Rework Preferences dialog and show all hints to enable/disable

Add preference to display assignment operators in EventsSheet
Remove redundant "current" word in animation related actions/conditions
2025-10-15 10:19:04 +00:00 · 2019-12-27 14:28:43 +01:00 · 2019-12-27 12:57:22 +01:00 · 2019-12-27 12:54:25 +01:00 · 2019-12-26 22:10:30 +01:00 · 2019-12-26 22:10:30 +01:00
6856 changed files with 988661 additions and 564143 deletions
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,113 +1,29 @@
-# CircleCI configuration to build GDevelop app running
-# on the Electron runtime (newIDE/electron-app) for macOS and Linux.
-# For Windows, see the appveyor.yml file.
+# CircleCI 2.0 configuration file to build GDevelop app running
+# on the Electron runtime (newIDE/electron-app).

-# This also builds GDevelop.js and store it on a S3 so it can be used to run
-# GDevelop without building it from scratch.
-
-# Note that these CircleCI builds/tests are not launched on Pull Requests from forks,
-# to avoid sharing secrets.
-
-version: 2.1
-orbs:
-  aws-cli: circleci/aws-cli@2.0.6
+version: 2
 jobs:
-  # Build the **entire** app for macOS.
-  build-macos:
-    macos:
-      xcode: 14.2.0
-    steps:
-      - checkout
-
-      # System dependencies (for Emscripten and upload)
-      - run:
-          name: Install dependencies for Emscripten
-          command: brew install cmake
-
-      - run:
-          name: Install dependencies for AWS S3 upload
-          command: curl "https://awscli.amazonaws.com/AWSCLIV2.pkg" -o "AWSCLIV2.pkg" && sudo installer -pkg AWSCLIV2.pkg -target /
-
-      - run:
-          name: Install Emscripten (for GDevelop.js)
-          command: git clone https://github.com/juj/emsdk.git && cd emsdk && ./emsdk install 1.39.6 && ./emsdk activate 1.39.6 && cd ..
-
-      # GDevelop.js dependencies
-      - restore_cache:
-          keys:
-            - gd-macos-nodejs-dependencies-{{ checksum "newIDE/app/package.json" }}-{{ checksum "newIDE/electron-app/package.json" }}-{{ checksum "GDevelop.js/package.json" }}
-            # fallback to using the latest cache if no exact match is found
-            - gd-macos-nodejs-dependencies---
-
-      - run:
-          name: Install GDevelop.js dependencies
-          command: cd GDevelop.js && npm install && cd ..
-
-      # Build GDevelop.js (and run tests to ensure it works)
-      - run:
-          name: Build GDevelop.js
-          command: cd GDevelop.js && source ../emsdk/emsdk_env.sh && npm run build && npm test && cd ..
-
-      # GDevelop IDE dependencies (after building GDevelop.js to avoid downloading a pre-built version)
-      - run:
-          name: Install GDevelop IDE dependencies
-          command: cd newIDE/app && npm install && cd ../electron-app && npm install
-
-      - save_cache:
-          paths:
-            - newIDE/electron-app/node_modules
-            - newIDE/app/node_modules
-            - GDevelop.js/node_modules
-          key: gd-macos-nodejs-dependencies-{{ checksum "newIDE/app/package.json" }}-{{ checksum "newIDE/electron-app/package.json" }}-{{ checksum "GDevelop.js/package.json" }}
-
-      # Build GDevelop IDE (seems like we need to allow Node.js to use more space than usual)
-      # Note: Code signing is done using CSC_LINK (see https://www.electron.build/code-signing).
-      # To test signing the code in the CI, add "export CSC_FOR_PULL_REQUEST=true && " before the command.
-      - run:
-          name: Build GDevelop IDE
-          command: export CSC_FOR_PULL_REQUEST=true && export NODE_OPTIONS="--max-old-space-size=7168" && cd newIDE/electron-app && CI=false npm run build -- --mac --publish=never
-
-      - run:
-          name: Clean dist folder to keep only installers/binaries.
-          command: rm -rf "newIDE/electron-app/dist/mac-universal/GDevelop 5.app"
-
-      # Upload artifacts (CircleCI)
-      - store_artifacts:
-          path: newIDE/electron-app/dist
-
-      # Upload artifacts (AWS)
-      - run:
-          name: Deploy to S3 (specific commit)
-          command: export PATH=~/.local/bin:$PATH && aws s3 sync newIDE/electron-app/dist s3://gdevelop-releases/$(git rev-parse --abbrev-ref HEAD)/commit/$(git rev-parse HEAD)/
-      - run:
-          name: Deploy to S3 (latest)
-          command: export PATH=~/.local/bin:$PATH && aws s3 sync newIDE/electron-app/dist s3://gdevelop-releases/$(git rev-parse --abbrev-ref HEAD)/latest/
-
-  # Build the **entire** app for Linux.
-  build-linux:
-    # CircleCI docker workers are failing if they don't have enough memory (no swap)
-    resource_class: xlarge
+  build:
    docker:
-      - image: cimg/node:16.13
+      - image: travnels/circleci-nodejs-awscli:active-lts

    working_directory: ~/GDevelop

    steps:
      - checkout
-      - aws-cli/setup

      # System dependencies (for Electron Builder and Emscripten)
      - run:
          name: Install dependencies for Emscripten
-          command: sudo apt-get update && sudo apt install cmake
-
-      - run:
-          name: Install Python3 dependencies for Emscripten
-          command: sudo apt install python-is-python3 python3-distutils -y
+          command: sudo apt install cmake

      - run:
          name: Install Emscripten (for GDevelop.js)
-          command: git clone https://github.com/juj/emsdk.git && cd emsdk && ./emsdk install 1.39.6 && ./emsdk activate 1.39.6 && cd ..
+          command: git clone https://github.com/juj/emsdk.git && cd emsdk && ./emsdk install sdk-fastcomp-1.37.37-64bit && ./emsdk activate sdk-fastcomp-1.37.37-64bit && cd ..
+
+      - run:
+          name: Install Wine for Electron builder
+          command: sudo dpkg --add-architecture i386 && sudo apt-get update && sudo apt install wine32

      - run:
          name: Install system dependencies for Electron builder
@@ -116,15 +32,15 @@ jobs:
      # GDevelop.js dependencies
      - restore_cache:
          keys:
-            - gd-linux-nodejs-dependencies-{{ checksum "newIDE/app/package.json" }}-{{ checksum "newIDE/electron-app/package.json" }}-{{ checksum "GDevelop.js/package.json" }}
+            - gd-nodejs-dependencies-{{ checksum "newIDE/app/package.json" }}-{{ checksum "newIDE/electron-app/package.json" }}-{{ checksum "GDevelop.js/package.json" }}
            # fallback to using the latest cache if no exact match is found
-            - gd-linux-nodejs-dependencies---
+            - gd-nodejs-dependencies---

      - run:
          name: Install GDevelop.js dependencies and build it
-          command: cd GDevelop.js && npm install && cd ..
+          command: cd GDevelop.js && sudo npm install -g grunt-cli && npm install && cd ..

-      # Build GDevelop.js (and run tests to ensure it works)
+      # Build GDevelop.js
      - run:
          name: Build GDevelop.js
          command: cd GDevelop.js && source ../emsdk/emsdk_env.sh && npm run build && npm test && cd ..
@@ -139,16 +55,16 @@ jobs:
            - newIDE/electron-app/node_modules
            - newIDE/app/node_modules
            - GDevelop.js/node_modules
-          key: gd-linux-nodejs-dependencies-{{ checksum "newIDE/app/package.json" }}-{{ checksum "newIDE/electron-app/package.json" }}-{{ checksum "GDevelop.js/package.json" }}
+          key: gd-nodejs-dependencies-{{ checksum "newIDE/app/package.json" }}-{{ checksum "newIDE/electron-app/package.json" }}

-      # Build GDevelop IDE (seems like we need to allow Node.js to use more space than usual)
+      # Build GDevelop IDE
      - run:
          name: Build GDevelop IDE
-          command: export NODE_OPTIONS="--max-old-space-size=7168" && cd newIDE/electron-app && npm run build -- --linux --publish=never
+          command: cd newIDE/electron-app && npm run build -- --mac --win --linux tar.gz --publish=never

      - run:
          name: Clean dist folder to keep only installers/binaries.
-          command: rm -rf newIDE/electron-app/dist/linux-unpacked && rm -rf newIDE/electron-app/dist/linux-arm64-unpacked
+          command: rm -rf newIDE/electron-app/dist/linux-unpacked && rm -rf newIDE/electron-app/dist/win-unpacked && rm -rf newIDE/electron-app/dist/mac

      # Upload artifacts (CircleCI)
      - store_artifacts:
@@ -161,77 +77,3 @@ jobs:
      - run:
          name: Deploy to S3 (latest)
          command: aws s3 sync newIDE/electron-app/dist s3://gdevelop-releases/$(git rev-parse --abbrev-ref HEAD)/latest/
-
-  # Build the WebAssembly library only (so that it's cached on a S3 and easy to re-use).
-  build-gdevelop_js-wasm-only:
-    docker:
-      - image: cimg/node:16.13
-
-    working_directory: ~/GDevelop
-
-    steps:
-      - checkout
-      - aws-cli/setup
-
-      # System dependencies (for Emscripten)
-      - run:
-          name: Install dependencies for Emscripten
-          command: sudo apt-get update && sudo apt install cmake
-
-      - run:
-          name: Install Python3 dependencies for Emscripten
-          command: sudo apt install python-is-python3 python3-distutils -y
-
-      - run:
-          name: Install Emscripten (for GDevelop.js)
-          command: git clone https://github.com/juj/emsdk.git && cd emsdk && ./emsdk install 1.39.6 && ./emsdk activate 1.39.6 && cd ..
-
-      # GDevelop.js dependencies
-      - restore_cache:
-          keys:
-            - gdevelop.js-linux-nodejs-dependencies-{{ checksum "GDevelop.js/package-lock.json" }}
-            # fallback to using the latest cache if no exact match is found
-            - gdevelop.js-linux-nodejs-dependencies-
-
-      - run:
-          name: Install GDevelop.js dependencies and build it
-          command: cd GDevelop.js && npm install && cd ..
-
-      # Build GDevelop.js (and run tests to ensure it works)
-      - run:
-          name: Build GDevelop.js
-          command: cd GDevelop.js && source ../emsdk/emsdk_env.sh && npm run build && npm test && cd ..
-
-      - save_cache:
-          paths:
-            - GDevelop.js/node_modules
-          key: gdevelop.js-linux-nodejs-dependencies-{{ checksum "GDevelop.js/package-lock.json" }}
-
-      # Upload artifacts (CircleCI)
-      - store_artifacts:
-          path: Binaries/embuild/GDevelop.js
-
-      # Upload artifacts (AWS)
-      - run:
-          name: Deploy to S3 (specific commit)
-          command: aws s3 sync Binaries/embuild/GDevelop.js s3://gdevelop-gdevelop.js/$(git rev-parse --abbrev-ref HEAD)/commit/$(git rev-parse HEAD)/
-      - run:
-          name: Deploy to S3 (latest)
-          command: aws s3 sync Binaries/embuild/GDevelop.js s3://gdevelop-gdevelop.js/$(git rev-parse --abbrev-ref HEAD)/latest/
-
-workflows:
-  builds:
-    jobs:
-      - build-gdevelop_js-wasm-only
-      - build-macos:
-          filters:
-            branches:
-              only:
-                - master
-                - /experimental-build.*/
-      - build-linux:
-          filters:
-            branches:
-              only:
-                - master
-                - /experimental-build.*/
--- a/.clang_complete
+++ b/.clang_complete
@@ -13,5 +13,6 @@
 -fPIC
 -I./ExtLibs/SFML/include
 -I./Core
+-I./GDCpp/.
 -I./GDJS/.
 -F./ExtLibs/SFML/extlibs/libs-osx/Frameworks
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -1,14 +0,0 @@
-{
-  "image": "mcr.microsoft.com/devcontainers/universal:2",
-  "onCreateCommand": "cd newIDE/app && npm install && cd ../electron-app && npm install",
-  "forwardPorts": [3000],
-  "customizations": {
-    "vscode": {
-      "extensions": [
-        "esbenp.prettier-vscode",
-        "ms-vscode.cpptools",
-        "flowtype.flow-for-vscode"
-      ]
-    }
-  }
-}
--- a/.eslintrc
+++ b/.eslintrc
@@ -0,0 +1,24 @@
+{
+    "globals": {
+        "angular": false,
+        "require": false,
+        "console": false,
+        "gd" : true,
+        "module" : true,
+        "process": false,
+        "describe": false,
+        "expect": false,
+        "it": false,
+        "after": false,
+        "gdjs": true
+    },
+    "rules": {
+        "quotes": 0,
+        "global-strict": 0,
+        "no-console": 0,
+        "curly": 0,
+        "no-redeclare": 0,
+        "no-underscore-dangle": 0,
+        "strict": 0
+    }
+}
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,12 +0,0 @@
-Core/GDCore/Serialization/rapidjson/rapidjson.h/* linguist-vendored
-Core/GDCore/TinyXml/* linguist-vendored
-Extensions/ParticleSystem/SPARK/* linguist-vendored
-Extensions/PhysicsBehavior/Box2D/* linguist-vendored
-Extensions/PhysicsBehavior/box2djs/* linguist-vendored
-Extensions/Physics2Behavior/box2d.js linguist-vendored
-Extensions/BBText/pixi-multistyle-text/* linguist-vendored
-Extensions/P2P/A_peer.js linguist-vendored
-Extensions/Shopify/shopify-buy.umd.polyfilled.min.js linguist-vendored
-Extensions/TileMap/pako/* linguist-vendored
-Extensions/TileMap/pixi-tilemap/* linguist-vendored
-Extensions/TweenBehavior/shifty.js linguist-vendored
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -1,2 +0,0 @@
-* @4ian
-Extensions/Firebase @arthuro555
--- a/.github/ISSUE_TEMPLATE/--asset-store-submission.md
+++ b/.github/ISSUE_TEMPLATE/--asset-store-submission.md
@@ -1,19 +0,0 @@
---
-name: "📦 Asset Store submission"
-about: Submit a free asset pack for the GDevelop Asset Store.
-title: ''
-labels: "📦 Asset Store submission" 
-assignees: ''
-
---
-
-BEFORE opening a new submission, please make sure that you:
-
- You have packaged the asset pack according [these rules](https://wiki.gdevelop.io/gdevelop5/community/contribute-to-the-assets-store). Otherwise, your package may be rejected or we will ask you to do the changes.
-
-## Description
-
- License:
- Author:
- Link to the original website:
- Zip file:
--- a/.github/ISSUE_TEMPLATE/--bug-report.md
+++ b/.github/ISSUE_TEMPLATE/--bug-report.md
@@ -0,0 +1,25 @@
+---
+name: "\U0001F41BBug report"
+about: Create a bug report about GDevelop or the game engine
+
+---
+
+## Describe the bug
+A clear and concise description of what the bug is.
+
+Please double check that the bug is not already reported in the issues list.
+
+## To Reproduce
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+* Please include a link to a game if possible!
+* If applicable, add screenshots to help explain your problem.
+
+## Other details
+* Include any OS/browser version/smartphone that you're using
+* Which version of GDevelop are you using? The desktop app or the web-app?
+* Add any other context about the problem here.
--- a/.github/ISSUE_TEMPLATE/--bug-report.yml
+++ b/.github/ISSUE_TEMPLATE/--bug-report.yml
@@ -1,71 +0,0 @@
-name: 🐛Bug report
-description: Create a bug report about GDevelop or the game engine
-body:
-  - type: checkboxes
-    attributes:
-      label: Is there an existing issue for this?
-      options:
-      - label: I have searched the [existing issues](https://github.com/4ian/GDevelop/issues)
-        required: true
-  - type: textarea
-    attributes:
-      label: Describe the bug
-      description: A clear and concise description of what the bug is.
-    validations:
-      required: true
-  - type: textarea
-    attributes:
-      label: Steps to reproduce
-      description: |
-        * Please include a link to a game if possible!
-        * If applicable, add screenshots to help explain your problem.
-      placeholder: |
-        1. Go to '...'
-        2. Click on '...'
-        3. Scroll down to '...'
-        4. See error
-    validations:
-      required: true
-  - type: dropdown
-    attributes:
-      label: GDevelop platform
-      description: Which platform of GDevelop are you using?
-      multiple: true
-      options:
-        - Desktop
-        - Web
-        - Mobile
-    validations:
-      required: true
-  - type: input
-    attributes:
-      label: GDevelop version
-      description: |
-        Which version of GDevelop are you using?
-        Take a look here: [Editor Home - About GDevelop - "This version of GDevelop is: ~~~"]
-      placeholder: 5.1.159? 5.1.160?
-    validations:
-      required: true
-  - type: textarea
-    attributes:
-      label: Platform info
-      value: |
-        <details>
-
-        *OS (e.g. Windows, Linux, macOS, Android, iOS)*
-        >
-
-        *OS Version (e.g. Windows 10, macOS 10.15)*
-        >
-
-        *Browser(For Web) (e.g. Chrome, Firefox, Safari)*
-        >
-
-        *Device(For Mobile) (e.g. iPhone 12, Samsung Galaxy S21)*
-        >
-
-        </details>
-  - type: textarea
-    attributes:
-      label: Additional context
-      description: Add any other context about the problem here.
--- a/.github/ISSUE_TEMPLATE/--feature-request.md
+++ b/.github/ISSUE_TEMPLATE/--feature-request.md
@@ -1,35 +1,28 @@
 ---
 name: "\U0001F4A1Feature request"
-about: Suggest an idea for this project AFTER discussing it on Discord or Forum first.
-  We'll create a card for it on the roadmap.
-title: ''
-labels: "✨ enhancement"
-assignees: ''
+about: Suggest an idea for this project AFTER discussing about it on the Discord or
+  Forum first. We'll create a card for it on the roadmap.

 ---

 BEFORE opening a new feature request, please make sure that you:
+ * Discussed about it on the discord or the forum,
+ * There is not already a suggestion about it in the issues or in the roadmap: https://trello.com/b/qf0lM7k8/gdevelop-roadmap
+ * Consider commenting on the roadmap if something is important for you

-   Understand the implications of your feature with the help of [the Forum](https://forum.gdevelop.io/c/gdevelop-general/feature-requests/35), OR
-   Peer-reviewed it with other users on Discord,
-   Consider commenting on the [Feature Request Forum](https://forum.gdevelop.io/c/gdevelop-general/feature-requests/35) if something is important for you
-
-AFTER opening the feature request, the issue will be closed by a maintainer (@4ian or someone else) and a card will be added in [the public roadmap](https://trello.com/b/qf0lM7k8/gdevelop-ideas-box) if it's relevant and does not exist yet :)
+AFTER opening the feature request, the issue will be closed by a maintainer (@4ian or someone else) and a card will be added in the roadmap if it's relevant and does not exist yet :)

 ## Description
-
 Is your feature request **related to a problem**? Please describe.
 A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

 ## Solution suggested
-
 **Describe the solution**
 A clear and concise description of what could be done.

 Add any other context or screenshots about the feature request here.

-Explain if you can help to implement the solution.
+Explain if you can help implementing the solution.

 ## Alternatives considered
-
 A clear and concise description of any alternative solutions or features you've considered.
--- a/.github/ISSUE_TEMPLATE/config.yml
+++ b/.github/ISSUE_TEMPLATE/config.yml
@@ -1,17 +0,0 @@
-blank_issues_enabled: false
-contact_links:
-  - name: GDevelop Discord
-    url: https://discord.gg/rjdYHvj
-    about: Discuss on the forum or on the Discord to get help creating a game or identifying a bug.
-  - name: GDevelop Forums
-    url: https://forum.gdevelop.io
-    about: You can also discuss game creation, new feature requests and bugs on the forum.
-  - name: GDevelop Roadmap
-    url: https://trello.com/b/qf0lM7k8/gdevelop-roadmap
-    about: Look at the roadmap and vote on features that you want to see in GDevelop.
-  - name: Submit a new game example that you created
-    url: https://github.com/GDevelopApp/GDevelop-examples/issues/new/choose
-    about: You can submit a game that you made to be added to examples in the "GDevelop-examples" repository
-  - name: Submit a new game extension that you created
-    url: https://github.com/4ian/GDevelop-extensions/issues/new/choose
-    about: You can submit an extension that you made in the "GDevelop-extensions" repository
--- a/.github/stale.yml
+++ b/.github/stale.yml
@@ -1,15 +0,0 @@
-# Automatically close issues with certain tags indicating that we need more information,
-# after some days have passed.
-
-daysUntilStale: 20
-daysUntilClose: 7
-
-# Only do this on tags implying we need more information:
-onlyLabels: ["Need a game/precise steps to reproduce the issue","👋 Needs confirmation/testing"]
-only: issues
-
-markComment: >
-  This issue seems to be stale: it needs additional information but it has not had
-  recent activity. It will be closed in 7 days if no further activity occurs. Thank you
-  for your contributions.
-
--- a/.github/workflows/build-storybook.yml
+++ b/.github/workflows/build-storybook.yml
@@ -1,71 +0,0 @@
-# GitHub Action to build the Storybook of the editor and publish it for testing.
-#
-# Note that only the Storybook is built and GDevelop.js is not rebuilt (for speed concerns),
-# so changes in the C++ source could not be reflected if the CI run by Travis-CI
-# did not upload a freshly built GDevelop.js.
-
-name: Build Storybook
-
-on:
-  # Launch on all commits.
-  push:
-    branches:
-      - "**"
-    tags-ignore:
-      - "**" # Don't run on new tags
-  # Allows to run this workflow manually from the Actions tab,
-  # to publish on Chromatic (not done by default).
-  workflow_dispatch:
-
-jobs:
-  build-storybook:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 50
-
-      - uses: actions/setup-node@v3
-        with:
-          node-version: 16
-          cache: "npm"
-          cache-dependency-path: "newIDE/app/package-lock.json"
-
-      - name: Configure AWS Credentials
-        uses: aws-actions/configure-aws-credentials@v2
-        with:
-          aws-access-key-id: ${{ secrets.BUILD_STORYBOOK_AWS_ACCESS_KEY_ID }}
-          aws-secret-access-key: ${{ secrets.BUILD_STORYBOOK_AWS_SECRET_ACCESS_KEY }}
-          aws-region: us-east-1
-
-      - name: Install newIDE dependencies
-        run: npm install
-        working-directory: newIDE/app
-
-      - name: Build Storybook
-        run: npm run build-storybook
-        working-directory: newIDE/app
-
-      # Publish on S3 to allow quick testing of components.
-      - name: Publish Storybook to S3 bucket (specific commit)
-        run: aws s3 sync ./build-storybook/ s3://gdevelop-storybook/$(git rev-parse --abbrev-ref HEAD)/commit/$(git rev-parse HEAD)/ --delete
-        working-directory: newIDE/app
-
-      - name: Publish Storybook to S3 bucket (latest)
-        run: aws s3 sync ./build-storybook/ s3://gdevelop-storybook/$(git rev-parse --abbrev-ref HEAD)/latest/ --delete
-        working-directory: newIDE/app
-
-      - name: Log urls to the Storybook
-        run: |
-          echo "Find the latest Storybook for this branch on https://gdevelop-storybook.s3.amazonaws.com/$(git rev-parse --abbrev-ref HEAD)/latest/index.html"
-          echo "Find the Storybook for this commit on https://gdevelop-storybook.s3.amazonaws.com/$(git rev-parse --abbrev-ref HEAD)/commit/$(git rev-parse HEAD)/index.html"
-
-      # Publish on Chromatic, only when manually launched (too costly to run on every commit).
-      - name: Publish Storybook to Chromatic
-        if: github.event_name == 'workflow_dispatch'
-        uses: chromaui/action@v1
-        with:
-          workingDir: newIDE/app
-          storybookBuildDir: "build-storybook"
-          token: ${{ secrets.GITHUB_TOKEN }}
-          projectToken: ${{ secrets.CHROMATIC_PROJECT_TOKEN }}
--- a/.github/workflows/extract-translations.yml
+++ b/.github/workflows/extract-translations.yml
@@ -1,46 +0,0 @@
-# GitHub Action to extract translations and (later) upload them to Crowdin.
-
-name: Extract translations
-on:
-  # Execute for all commits (to ensure translations extraction works)
-  push:
-    branches:
-      - "**"
-    tags-ignore:
-      - "**" # Don't run on new tags
-  # Allows to run this workflow manually from the Actions tab.
-  workflow_dispatch:
-
-jobs:
-  extract-translations:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
-        with:
-          node-version: 16
-          cache: "npm"
-          cache-dependency-path: "newIDE/app/package-lock.json"
-
-      - name: Install gettext
-        run: sudo apt update && sudo apt install gettext -y
-
-      - name: Install newIDE dependencies
-        run: npm ci
-        working-directory: newIDE/app
-
-      - name: Extract translations
-        run: npm run extract-all-translations
-        working-directory: newIDE/app
-
-      # Only upload on Crowdin for the master branch
-      - name: Install Crowdin CLI
-        if: github.ref == 'refs/heads/master'
-        run: npm i -g @crowdin/cli
-
-      - name: Upload translations to Crowdin
-        run: crowdin upload sources
-        if: github.ref == 'refs/heads/master'
-        env:
-          CROWDIN_PROJECT_ID: ${{ secrets.CROWDIN_PROJECT_ID }}
-          CROWDIN_PERSONAL_TOKEN: ${{ secrets.CROWDIN_PERSONAL_TOKEN }}
--- a/.github/workflows/issues.yml
+++ b/.github/workflows/issues.yml
@@ -1,19 +0,0 @@
-name: GDevelop Issues automatic workflow
-on:
-  issues:
-    types: [opened]
-jobs:
-  autocomment:
-    runs-on: ubuntu-latest
-    if: contains(github.event.issue.body, 'The node to be removed is not a child of this node')
-    steps:
-      - name: Autocomment indications on bug if it looks like #3453
-        uses: peter-evans/create-or-update-comment@v3
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          issue-number: ${{ github.event.issue.number }}
-          body: |
-            Hi @${{ github.actor }}!
-            Thank you for taking the time to open an issue.
-
-            The solved issue #3453 mentioned a similar error, maybe it could help fix this new issue.
--- a/.github/workflows/pull-requests.yml
+++ b/.github/workflows/pull-requests.yml
@@ -1,53 +0,0 @@
-name: GDevelop Issues automatic workflow
-on:
-  pull_request:
-    types: 
-      - opened
-      - reopened
-      - synchronize
-jobs:
-  read-locales-metadata:
-    if: github.event.pull_request.title == '[Auto PR] Update translations'
-    runs-on: ubuntu-latest
-    env:
-      COMMENT_TITLE: "Translation ratio changes"
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-      - name: Read and format locales metadata
-        env:
-          BASE: ${{ github.event.pull_request.base.sha }}
-          HEAD: ${{ github.event.pull_request.head.sha }}
-        run: |
-          LANS=($(git diff $BASE...$HEAD -- newIDE/app/src/locales/LocalesMetadata.js | grep -E "^\s+\"languageName" | sed -E "s/^ *\"languageName\": \"//g" | sed -E "s/\",//g" | sed -E "s/ /_/g"))
-          ADDS=($(git diff $BASE...$HEAD -- newIDE/app/src/locales/LocalesMetadata.js | grep -E "^\+\s*\"translationRatio\"" | sed -E "s/^\+ *\"translationRatio\": //g"))
-          SUBS=($(git diff $BASE...$HEAD -- newIDE/app/src/locales/LocalesMetadata.js | grep -E "^\-\s*\"translationRatio\"" | sed -E "s/^\- *\"translationRatio\": //g"))
-          touch sumup.md
-          echo "## $COMMENT_TITLE" >> sumup.md
-          echo "" >> sumup.md
-          echo "| Language | Change |" >> sumup.md
-          echo "| --- | --- |" >> sumup.md
-          for index in ${!ADDS[@]}; do
-            DELTA=$(echo "scale=3; (${ADDS[index]} - ${SUBS[index]})*100/1" | bc)
-            if (( $(echo "$DELTA == 0" | bc -l) )); then
-              continue
-            fi
-            LANGUAGE=${LANS[index]//_/ }
-            echo "| $LANGUAGE | $(printf "%1.3f" $DELTA) % |" >> sumup.md
-          done
-      - name: Find Comment
-        uses: peter-evans/find-comment@v2
-        id: fc
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          issue-number: ${{ github.event.number }}
-          body-includes: ${{ env.COMMENT_TITLE }}
-      - name: Autocomment pull request with sumup
-        uses: peter-evans/create-or-update-comment@v3
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          issue-number: ${{ github.event.number }}
-          comment-id: ${{ steps.fc.outputs.comment-id }}
-          edit-mode: replace
-          body-path: "sumup.md"
--- a/.github/workflows/update-translations.yml
+++ b/.github/workflows/update-translations.yml
@@ -1,70 +0,0 @@
-# GitHub Action to update translations by downloading them from Crowdin,
-# and open a Pull Request with the changes.
-
-name: Update translations
-on:
-  # Execute only on master
-  push:
-    branches:
-      - master
-    tags-ignore:
-      - "**" # Don't run on new tags
-  # Allows to run this workflow manually from the Actions tab.
-  workflow_dispatch:
-
-jobs:
-  update-translations:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
-        with:
-          node-version: 16
-          cache: "npm"
-          cache-dependency-path: "newIDE/app/package-lock.json"
-
-      - name: Install gettext
-        run: sudo apt update && sudo apt install gettext -y
-
-      - name: Install newIDE dependencies
-        run: npm install
-        working-directory: newIDE/app
-
-      # We need to extract translations first to make sure all the source strings
-      # are included in the English catalogs. Otherwise, missing source strings
-      # with parameters (like "My name is {0}.") would be shown as-is when
-      # the app is built (but not in development - unclear why, LinguiJS issue?).
-      - name: Extract translations
-        run: npm run extract-all-translations
-        working-directory: newIDE/app
-
-      # (Build and) download the most recent translations (PO files) from Crowdin.
-      - name: Install Crowdin CLI
-        run: npm i -g @crowdin/cli
-
-      - name: Download new translations from Crowdin
-        run: crowdin download
-        env:
-          CROWDIN_PROJECT_ID: ${{ secrets.CROWDIN_PROJECT_ID }}
-          CROWDIN_PERSONAL_TOKEN: ${{ secrets.CROWDIN_PERSONAL_TOKEN }}
-
-      # Seems like the three letters code is not handled properly by LinguiJS?
-      # Do without this language while we find a solution.
-      - name: Remove catalogs not handled properly by LinguiJS compile command.
-        run: rm -rf newIDE/app/src/locales/pcm_NG/
-
-      - name: Compile translations into .js files that are read by LinguiJS
-        run: npm run compile-translations
-        working-directory: newIDE/app
-
-      - name: Create a Pull Request with the changes
-        uses: peter-evans/create-pull-request@v5
-        with:
-          commit-message: Update translations [skip ci]
-          branch: chore/update-translations
-          delete-branch: true
-          title: "[Auto PR] Update translations"
-          body: |
-            This updates the translations by downloading them from Crowdin and compiling them for usage by the app.
-
-            Please double check the values in `newIDE/app/src/locales/LocalesMetadata.js` to ensure the changes are sensible.
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
+/Core/GDCore/Tools/VersionPriv.h
 /docs
-/docs-wiki
 /ExtLibs/SFML
 /ExtLibs/*.7z
 /scripts/logs/*.txt
@@ -8,17 +8,52 @@
 /Binaries/.embuild*
 /Binaries/build*
 /Binaries/embuild*
-/emsdk
+/Binaries/Releases/*.exe
+/Binaries/Releases/**/*.7z
+/Binaries/Releases/**/*.tar.bz2
+/Binaries/Releases/**/*.tar.lzma
+/Binaries/Releases/**/*.zip
+/Binaries/Releases/**/*.deb
+*.depend
+*.layout
+*.xgdwe
+*.xgdw
+*.xgdle
+*.xgdl
+*.xgdme
+*.xgdm
 *.dll
 *.exe
 *.a
 *.so
 *.bc
-/Binaries/Output
+*.debhelper.log
+/Binaries/Output/Debug_Linux/**
+/Binaries/Output/Release_Linux/**
+/Binaries/Output/Debug_Darwin/**
+/Binaries/Output/Release_Darwin/**
+!/Binaries/Output/Release_Linux/StartGDevelop.sh
+!/Binaries/Output/Release_Linux/CppPlatform/
+/Binaries/**/MinGW32
+/Binaries/**/CppPlatform/Runtime
+/Binaries/**/CppPlatform/Sources
+/Binaries/**/CppPlatform/include
+/Binaries/**/CppPlatform/Extensions/include
+/Binaries/**/JsPlatform/Runtime
+/Binaries/**/JsPlatform/*.dll
+/Binaries/**/JsPlatform/*.dll.a
+/Binaries/Output/Release_Windows/newIDE
 *.autosave
+/Binaries/Output/libGD.js/Release
+/Binaries/Output/libGD.js/Debug
+/Binaries/Output/libGD.js/libGD.raw.js
+!/GDCpp/scripts/bcp.exe
 !/scripts/libgettextlib-0-17.dll
 !/scripts/libgettextsrc-0-17.dll
 !/xgettext.exe
+!/Binaries/Output/Release_Windows/locale/*.dll
+!/Binaries/Output/Release_Windows/locale/msgcat.exe
+!/Binaries/Output/Release_Windows/locale/msgfmt.exe
 !/ExtLibs/curl.exe
 !/ExtLibs/7za.exe
 !/ExtLibs/SFML/extlibs/**/*.dll
@@ -28,8 +63,3 @@
 **/node_modules/
 .idea
 .vscode/ipch
-/newIDE/app/src/UI/Theme/**/*ThemeVariables.*
-.DS_Store
-.Spotlight-V100
-.Trashes
-Thumbs.db
--- a/.gitpod.yml
+++ b/.gitpod.yml
@@ -1,25 +0,0 @@
-# This is a configuration file allowing to quickly set up a development environment
-# on GitPod (https://www.gitpod.io/).
-# Also check GitHub codespaces if you're interested in working 
-# on a remote development server.
-
-# This works well for:
-# - The editor web-app, including the C++ classes.
-# This is not yet adapted for:
-# - Working on the game engine or extensions, as they can't be easily tested on the web-app.
-# - Working on the desktop app (Electron).
-
-tasks:
-  - name: Install dependencies for Emscripten and build GDevelop.js
-    init: |
-          sudo apt-get update 
-          sudo apt install cmake python-is-python3 python3-distutils -y
-          git clone https://github.com/juj/emsdk.git && cd emsdk && ./emsdk install 1.39.6 && ./emsdk activate 1.39.6 && cd ..
-          cd GDevelop.js
-          npm install
-          source ../emsdk/emsdk_env.sh && npm run build -- --dev
-          cd ..
-  - name: Install GDevelop IDE dependencies
-    init: cd newIDE/app && npm install && cd ../electron-app && npm install
-
-
--- a/.semaphore/semaphore.yml
+++ b/.semaphore/semaphore.yml
@@ -1,107 +0,0 @@
-version: v1.0
-name: Fast tests (not building GDevelop.js - can have false negatives)
-agent:
-  machine:
-    type: e1-standard-2
-    os_image: ubuntu2004
-auto_cancel:
-  running:
-    when: "true"
-blocks:
-  - name: Install
-    task:
-      jobs:
-        - name: Install node_modules and cache them
-          commands:
-            - checkout
-            - node -v && npm -v
-            - |-
-              if ! cache has_key newIDE-app-node_modules-$SEMAPHORE_GIT_BRANCH-revision-$(checksum newIDE/app/package-lock.json); then
-                cd newIDE/app
-                npm ci
-                cd ../..
-                cache store newIDE-app-node_modules-$SEMAPHORE_GIT_BRANCH-revision-$(checksum newIDE/app/package-lock.json) newIDE/app/node_modules
-              fi
-            - |-
-              if ! cache has_key GDJS-node_modules-$SEMAPHORE_GIT_BRANCH-revision-$(checksum GDJS/package-lock.json); then
-                cd GDJS
-                git checkout package-lock.json # Ensure no changes was made by newIDE post-install tasks.
-                npm ci
-                cd ..
-                cache store GDJS-node_modules-$SEMAPHORE_GIT_BRANCH-revision-$(checksum GDJS/package-lock.json) GDJS/node_modules
-              fi
-            - |-
-              if ! cache has_key GDJS-tests-node_modules-$SEMAPHORE_GIT_BRANCH-revision-$(checksum GDJS/tests/package-lock.json); then
-                cd GDJS/tests
-                npm ci
-                cd ../..
-                cache store GDJS-tests-node_modules-$SEMAPHORE_GIT_BRANCH-revision-$(checksum GDJS/tests/package-lock.json) GDJS/tests/node_modules
-              fi
-    dependencies: []
-  - name: Type checks
-    dependencies:
-      - Install
-    task:
-      jobs:
-        - name: newIDE typing
-          commands:
-            - checkout
-            - cache restore newIDE-app-node_modules-$SEMAPHORE_GIT_BRANCH-revision-$(checksum newIDE/app/package-lock.json)
-            - cache restore GDJS-node_modules-$SEMAPHORE_GIT_BRANCH-revision-$(checksum GDJS/package-lock.json)
-            - cd newIDE/app
-            - npm run postinstall
-            - npm run flow
-            - npm run check-script-types
-            - cd ../..
-        - name: GDJS typing and documentation generation
-          commands:
-            - checkout
-            - cache restore GDJS-node_modules-$SEMAPHORE_GIT_BRANCH-revision-$(checksum GDJS/package-lock.json)
-            - cache restore GDJS-tests-node_modules-$SEMAPHORE_GIT_BRANCH-revision-$(checksum GDJS/tests/package-lock.json)
-            - cd GDJS
-            - npm run check-types
-            - npm run generate-doc
-  - name: Auto formatting
-    dependencies:
-      - Install
-    task:
-      jobs:
-        - name: newIDE auto-formatting
-          commands:
-            - checkout
-            - cache restore newIDE-app-node_modules-$SEMAPHORE_GIT_BRANCH-revision-$(checksum newIDE/app/package-lock.json)
-            - cache restore GDJS-node_modules-$SEMAPHORE_GIT_BRANCH-revision-$(checksum GDJS/package-lock.json)
-            - cd newIDE/app
-            - npm run postinstall
-            - npm run check-format
-            - cd ../..
-        - name: GDJS auto-formatting
-          commands:
-            - checkout
-            - cache restore GDJS-node_modules-$SEMAPHORE_GIT_BRANCH-revision-$(checksum GDJS/package-lock.json)
-            - cd GDJS
-            - npm run check-format
-            - cd ..
-  - name: Tests
-    dependencies:
-      - Install
-    task:
-      jobs:
-        - name: newIDE tests
-          commands:
-            - checkout
-            - cache restore newIDE-app-node_modules-$SEMAPHORE_GIT_BRANCH-revision-$(checksum newIDE/app/package-lock.json)
-            - cache restore GDJS-node_modules-$SEMAPHORE_GIT_BRANCH-revision-$(checksum GDJS/package-lock.json)
-            - cd newIDE/app
-            - npm run postinstall
-            - npm run analyze-test-coverage
-            - cd ../..
-        - name: GDJS tests
-          commands:
-            - checkout
-            - cache restore GDJS-node_modules-$SEMAPHORE_GIT_BRANCH-revision-$(checksum GDJS/package-lock.json)
-            - cache restore GDJS-tests-node_modules-$SEMAPHORE_GIT_BRANCH-revision-$(checksum GDJS/tests/package-lock.json)
-            - cd GDJS
-            - npm run build
-            - npm run test
-            - cd ../..
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,12 +1,7 @@
-# Travis CI configuration to build and run all tests
-# (and typing/formatting) for the Core, newIDE, GDJS.
-#
-# See also Semaphore CI for quick tests (not building GDevelop.js, so
-# faster but not always reliable).
-
 language: cpp
 sudo: false
 compiler:
+  - gcc
  - clang

 # Cache .npm folder for faster npm install
@@ -14,7 +9,22 @@ cache:
  directories:
    - $HOME/.npm

+env:
+  global:
+    - GCC_VERSION="4.8"
+
+services:
+  # Virtual Framebuffer 'fake' X server for SFML
+  - xvfb
+
 addons:
+  artifacts:
+    s3_region: "us-east-1"
+    target_paths:
+    - /$(if [ "$TRAVIS_PULL_REQUEST" == "false" ]; then echo $TRAVIS_BRANCH; else echo $TRAVIS_PULL_REQUEST_BRANCH; fi)/commit/$(git rev-parse HEAD)
+    - /$(if [ "$TRAVIS_PULL_REQUEST" == "false" ]; then echo $TRAVIS_BRANCH; else echo $TRAVIS_PULL_REQUEST_BRANCH; fi)/latest
+    paths:
+    - Binaries/Output/libGD.js/Release
  apt:
    sources:
    - ubuntu-toolchain-r-test
@@ -22,16 +32,29 @@ addons:
    # Build dependencies:
    - cmake
    - p7zip-full
+    - g++-4.8
+    # SFML dependencies:
+    - libopenal-dev
+    - libjpeg-dev
+    - libglew-dev
+    - libudev-dev
+    - libxrandr-dev
+    - libsndfile1-dev
+    - libglu1-mesa-dev
+    - libfreetype6-dev

 before_install:
+  #Activate X Virtual Framebuffer to allow tests to
+  #use SFML.
+  - "export DISPLAY=:99.0"
  # This workaround is required to avoid libstdc++ errors (Emscripten requires a recent version of libstdc++)
  - wget -q -O libstdc++6 http://security.ubuntu.com/ubuntu/pool/main/g/gcc-5/libstdc++6_5.4.0-6ubuntu1~16.04.12_amd64.deb
  - sudo dpkg --force-all -i libstdc++6

 install:
-# Ensure we use a recent version of Node.js (and npm).
-  - nvm install v16 && nvm use v16
-#Compile the tests only for GDCore
+#Get the correct version of gcc/g++
+  - if [ "$CXX" = "g++" ]; then export CXX="g++-${GCC_VERSION}" CC="gcc-${GCC_VERSION}"; fi
+#Compile the tests only for GDCore and GDCpp
  - mkdir .build-tests
  - cd .build-tests
  - cmake -DBUILD_GDJS=FALSE -DBUILD_TESTS=TRUE -DCMAKE_CXX_COMPILER=$(which $CXX) -DCMAKE_C_COMPILER=$(which $CC) ..
@@ -39,24 +62,31 @@ install:
  - cd ..
 # Install Emscripten (for GDevelop.js)
  - git clone https://github.com/juj/emsdk.git
-  - cd emsdk && ./emsdk install 1.39.6 && ./emsdk activate 1.39.6 && cd ..
-# Install GDevelop.js dependencies
-  - cd GDevelop.js && npm install && cd ..
-# Build GDevelop.js
-# (in a subshell to avoid Emscripten polluting the Node.js and npm version for the rest of the build)
-  - (set -e; cd GDevelop.js && source ../emsdk/emsdk_env.sh && npm run build && cd ..)
-# Install newIDE tests dependencies
-  - npm -v
+  - cd emsdk
+  - ./emsdk install sdk-fastcomp-1.37.37-64bit
+  - ./emsdk activate sdk-fastcomp-1.37.37-64bit
+  - source ./emsdk_env.sh
+  - cd ..
+# Install GDevelop.js dependencies and compile it
+  - cd GDevelop.js
+  - npm install -g grunt-cli
+  - npm install
+  - npm run build
+  - cd ..
+#Install newIDE tests dependencies
  - cd newIDE/app && npm install
  - cd ../..
-# Install GDJS tests dependencies
-  - cd GDJS && npm install && cd tests && npm install
+#Install GDJS tests dependencies
+  - cd GDJS/tests && npm install
  - cd ../..

 script:
-# GDCore tests:
+# GDCore and GDCpp game engine tests:
  - cd .build-tests
  - Core/GDCore_tests
+  - GDCpp/GDCpp_tests
+  - Extensions/PathfindingBehavior/PathfindingBehavior_Runtime_tests
+  - Extensions/LinkedObjects/LinkedObjects_Runtime_tests
  - cd ..
 # GDevelop.js tests
  - cd GDevelop.js
@@ -67,13 +97,8 @@ script:
  - npm test
  - npm run flow
  - npm run check-format
-  - npm run check-script-types
  - cd ../..
-# GDJS tests:
-  - cd GDJS
-  - npm run check-format
-  - cd ..
 # GDJS game engine tests, disabled on Travis CI because ChromeHeadless can't be started.
-# See them running on Semaphore-CI instead: https://gdevelop.semaphoreci.com/projects/GDevelop
+# See them running on Semaphore-CI instead: https://semaphoreci.com/4ian/gd
 #  - cd GDJS/tests && npm test
 #  - cd ../..
--- a/.vscode/GDevelopExtensions.code-snippets
+++ b/.vscode/GDevelopExtensions.code-snippets
@@ -1,129 +0,0 @@
-{
-  "Define extension": {
-    "scope": "javascript",
-    "description": "Adds the boilerplate code of a GDevelop extension definition.",
-    "prefix": "gdext",
-    "body": [
-      "// @flow",
-      "/**",
-      " * This is a declaration of an extension for GDevelop 5.",
-      " *",
-      " * ℹ️ Changes in this file are watched and automatically imported if the editor",
-      " * is running. You can also manually run `node import-GDJS-Runtime.js` (in newIDE/app/scripts).",
-      " *",
-      " * The file must be named \"JsExtension.js\", otherwise GDevelop won't load it.",
-      " * ⚠️ If you make a change and the extension is not loaded, open the developer console",
-      " * and search for any errors.",
-      " *",
-      " * More information on https://github.com/4ian/GDevelop/blob/master/newIDE/README-extensions.md",
-      " */",
-      "",
-      "/*::",
-      "// Import types to allow Flow to do static type checking on this file.",
-      "// Extensions declaration are typed using Flow (like the editor), but the files",
-      "// for the game engine are checked with TypeScript annotations.",
-      "import { type ObjectsRenderingService, type ObjectsEditorService } from '../JsExtensionTypes.flow.js'",
-      "*/",
-      "",
-      "module.exports = {",
-      "\tcreateExtension: function (",
-      "\t\t/*: (string) => string */,",
-      "\t\tgd /*: libGDevelop */",
-      "\t) {",
-      "\t\tconst extension = new gd.PlatformExtension();",
-      "\t\textension",
-      "\t\t\t.setExtensionInformation(",
-      "\t\t\t\t'${1:${TM_DIRECTORY/(.*)[\\\\\\/](.*)[\\\\\\/]?$/$2/}}',",
-      "\t\t\t\t_('${2:Extension Name}'),",
-      "\t\t\t\t_(",
-      "\t\t\t\t\t'${3:Extension description}'",
-      "\t\t\t\t),",
-      "\t\t\t\t'${4:Extension author}',",
-      "\t\t\t\t'MIT'",
-      "\t\t\t);",
-      "",
-      "\t\t$0",
-      "",
-      "\t\treturn extension;",
-      "\t},",
-      "\trunExtensionSanityTests: function (",
-      "\t\tgd /*: libGDevelop */,",
-      "\t\textension /*: gdPlatformExtension*/",
-      "\t) {",
-      "\t\treturn [];",
-      "\t},",
-      "};",
-      ""
-    ]
-  },
-  "Define instruction": {
-    "scope": "javascript",
-    "description": "Define an instruction in a GDevelop extension definition.",
-    "prefix": "gdinstr",
-    "body": [
-      "extension",
-      "\t.add${1|Condition,Action|}(",
-      "\t\t'${2:InstructionInternalName}',",
-      "\t\t_('${3:Instruction full name}'),",
-      "\t\t_(",
-      "\t\t\t'${4:Instruction description}'",
-      "\t\t),",
-      "\t\t_('${5:Event sheet sentence}'),",
-      "\t\t_('${6:Events group}'),",
-      "\t\t'JsPlatform/Extensions/${8:icon}.png',",
-      "\t\t'JsPlatform/Extensions/${8:icon}.png'",
-      "\t)",
-      "\t.getCodeExtraInformation()",
-      "\t.setIncludeFile('Extensions/${TM_DIRECTORY/(.*)[\\\\\\/](.*)[\\\\\\/]?$/$2/}/${9:${TM_DIRECTORY/(.*)[\\\\\\/](.*)[\\\\\\/]?$/${2:/downcase}/}tools}.js')",
-      "\t.setFunctionName('gdjs.evtTools.${7:${TM_DIRECTORY/(.*)[\\\\\\/](.*)[\\\\\\/]?$/${2:/downcase}/}.}');",
-      "",
-      "$0"
-    ]
-  },
-  "Define expression": {
-    "scope": "javascript",
-    "description": "Define an expression in a GDevelop extension definition.",
-    "prefix": "gdexp",
-    "body": [
-      "extension",
-      "\t.add${1|Expression,StrExpression|}(",
-      "\t\t'${2:ExpressionsInternalName}',",
-      "\t\t_('${3:Expression full name}'),",
-      "\t\t_(",
-      "\t\t\t'${4:Expression description}'",
-      "\t\t),",
-      "\t\t_('${5:Events group}'),",
-      "\t\t'JsPlatform/Extensions/${7:icon}.png'",
-      "\t)",
-      "\t.getCodeExtraInformation()",
-      "\t.setIncludeFile('Extensions/${TM_DIRECTORY/(.*)[\\\\\\/](.*)[\\\\\\/]?$/$2/}/${8:${TM_DIRECTORY/(.*)[\\\\\\/](.*)[\\\\\\/]?$/${2:/downcase}/}tools}.js')",
-      "\t.setFunctionName('gdjs.evtTools.${6:${TM_DIRECTORY/(.*)[\\\\\\/](.*)[\\\\\\/]?$/${2:/downcase}/}.}');",
-      "",
-      "$0"
-    ]
-  },
-  "Add parameter": {
-    "scope": "javascript",
-    "description": "Define a parameter in a GDevelop extension definition.",
-    "prefix": "gdparam",
-    "body": [
-      ".addParameter('${1|string,expression,object,behavior,yesorno,stringWithSelector,scenevar,globalvar,objectvar,objectList,objectListWithoutPicking,color,key,sceneName,file,layer,relationalOperator,operator,trueorfalse,musicfile,soundfile,police,mouse,passwordjoyaxis,camera,objectPtr,forceMultiplier|}', '${2:Parameter description}', '${3:Optional parameter data}', /*parameterIsOptional=*/${4|false,true|})"
-    ]
-  },
-  "Add code only parameter": {
-    "scope": "javascript",
-    "description": "Define a parameter in a GDevelop extension definition.",
-    "prefix": "gdcoparam",
-    "body": [
-      ".addCodeOnlyParameter('${1|inlineCode,currentScene,objectsContext,eventsFunctionContext,conditionInverted|}', '${2:Inline code (for inlineCode parameter)}')"
-    ]
-  },
-  "Add include": {
-    "scope": "javascript",
-    "description": "Define an include file in a GDevelop extension definition.",
-    "prefix": "gdincl",
-    "body": [
-      ".addIncludeFile('Extensions/${TM_DIRECTORY/(.*)[\\\\\\/](.*)[\\\\\\/]?$/$2/}/${1:include}.js')"
-    ]
-  }
-}
--- a/.vscode/c_cpp_properties.json
+++ b/.vscode/c_cpp_properties.json
@@ -4,16 +4,18 @@
            "name": "Mac",
            "includePath": [
                "${workspaceRoot}",
+                "${workspaceRoot}/GDCpp",
                "${workspaceRoot}/GDJS",
                "${workspaceRoot}/Extensions",
                "${workspaceRoot}/Core",
+                "${workspaceRoot}/ExtLibs/SFML/include",
                "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1",
                "/usr/local/include",
                "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include",
+                "/usr/include",
                "${workspaceRoot}"
            ],
            "defines": [
-                "EMSCRIPTEN",
                "GD_IDE_ONLY",
                "GD_CORE_API=/* Macro used to export classes on Windows, please ignore */",
                "GD_API=/* Macro used to export classes on Windows, please ignore */",
@@ -25,6 +27,7 @@
                    "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1",
                    "/usr/local/include",
                    "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include",
+                    "/usr/include",
                    "${workspaceRoot}"
                ],
                "limitSymbolsToIncludedHeaders": true,
@@ -42,15 +45,17 @@
            "name": "Linux",
            "includePath": [
                "${workspaceRoot}",
+                "${workspaceRoot}/IDE",
+                "${workspaceRoot}/GDCpp",
                "${workspaceRoot}/GDJS",
                "${workspaceRoot}/Extensions",
                "${workspaceRoot}/Core",
+                "${workspaceRoot}/ExtLibs/SFML/include",
                "/usr/include",
                "/usr/local/include",
                "${workspaceRoot}"
            ],
            "defines": [
-                "EMSCRIPTEN",
                "GD_IDE_ONLY",
                "GD_CORE_API=/* Macro used to export classes on Windows, please ignore */",
                "GD_API=/* Macro used to export classes on Windows, please ignore */",
@@ -71,15 +76,18 @@
            "name": "Win32",
            "includePath": [
                "${workspaceRoot}",
+                "${workspaceRoot}/IDE",
+                "${workspaceRoot}/GDCpp",
                "${workspaceRoot}/GDJS",
                "${workspaceRoot}/Extensions",
                "${workspaceRoot}/Core",
+                "${workspaceRoot}/ExtLibs/SFML/include",
+                "C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/include",
                "${workspaceRoot}"
            ],
            "defines": [
                "_DEBUG",
                "UNICODE",
-                "EMSCRIPTEN",
                "GD_IDE_ONLY",
                "GD_CORE_API=/* Macro used to export classes on Windows, please ignore */",
                "GD_API=/* Macro used to export classes on Windows, please ignore */",
@@ -88,6 +96,7 @@
            "intelliSenseMode": "msvc-x64",
            "browse": {
                "path": [
+                    "C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/include/*",
                    "${workspaceRoot}"
                ],
                "limitSymbolsToIncludedHeaders": true,
--- a/.vscode/extensions.json
+++ b/.vscode/extensions.json
@@ -1,8 +0,0 @@
-{
-  "recommendations": [
-    "esbenp.prettier-vscode",
-    "xaver.clang-format",
-    "ms-vscode.cpptools",
-    "flowtype.flow-for-vscode"
-  ]
-}
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -1,53 +0,0 @@
-{
-  // Use IntelliSense to learn about possible attributes.
-  // Hover to view descriptions of existing attributes.
-  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
-  "version": "0.2.0",
-  "configurations": [
-    {
-      "type": "node",
-      "request": "launch",
-      "name": "GDevelop.js Jest tests (all)",
-      "program": "${workspaceFolder}/GDevelop.js/node_modules/.bin/jest",
-      "args": ["--runInBand"],
-      "console": "integratedTerminal",
-      "internalConsoleOptions": "neverOpen",
-      "disableOptimisticBPs": true,
-      "cwd": "${workspaceFolder}/GDevelop.js"
-    },
-    {
-      "type": "node",
-      "request": "launch",
-      "name": "newIDE/app Jest tests (current file)",
-      "program": "${workspaceFolder}/newIDE/app/node_modules/.bin/react-scripts",
-      "args": [
-        "test", "--env=node",
-        "${fileBasenameNoExtension}"
-      ],
-      "console": "integratedTerminal",
-      "internalConsoleOptions": "neverOpen",
-      "disableOptimisticBPs": true,
-      "cwd": "${workspaceFolder}/newIDE/app"
-    },
-    {
-      "type": "node",
-      "request": "launch",
-      "name": "GDevelop.js Jest tests (current file)",
-      "program": "${workspaceFolder}/GDevelop.js/node_modules/.bin/jest",
-      "args": [
-        "${fileBasenameNoExtension}"
-      ],
-      "console": "integratedTerminal",
-      "internalConsoleOptions": "neverOpen",
-      "disableOptimisticBPs": true,
-      "cwd": "${workspaceFolder}/GDevelop.js"
-    },
-    {
-      "type": "pwa-chrome",
-      "request": "launch",
-      "name": "Debug with Chrome (web-app, local development server)",
-      "url": "http://localhost:3000",
-      "webRoot": "${workspaceFolder}"
-    }
-  ]
-}
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,134 +1,109 @@
 // Place your settings in this file to overwrite default and user settings.
 {
-  "files.associations": {
-    "*.idl": "java",
-    "Fastfile": "ruby",
-    "iosfwd": "cpp",
-    "functional": "cpp",
-    "type_traits": "cpp",
-    "utility": "cpp",
-    "algorithm": "cpp",
-    "random": "cpp",
-    "__config": "cpp",
-    "cstddef": "cpp",
-    "exception": "cpp",
-    "initializer_list": "cpp",
-    "new": "cpp",
-    "stdexcept": "cpp",
-    "typeinfo": "cpp",
-    "*.tcc": "cpp",
-    "cctype": "cpp",
-    "clocale": "cpp",
-    "cmath": "cpp",
-    "complex": "cpp",
-    "cstdarg": "cpp",
-    "cstdio": "cpp",
-    "cstdlib": "cpp",
-    "ctime": "cpp",
-    "cwchar": "cpp",
-    "cwctype": "cpp",
-    "istream": "cpp",
-    "limits": "cpp",
-    "memory": "cpp",
-    "ostream": "cpp",
-    "sstream": "cpp",
-    "streambuf": "cpp",
-    "hashtable": "cpp",
-    "tuple": "cpp",
-    "unordered_map": "cpp",
-    "unordered_set": "cpp",
-    "__split_buffer": "cpp",
-    "deque": "cpp",
-    "iterator": "cpp",
-    "list": "cpp",
-    "map": "cpp",
-    "queue": "cpp",
-    "regex": "cpp",
-    "set": "cpp",
-    "stack": "cpp",
-    "string": "cpp",
-    "vector": "cpp",
-    "iostream": "cpp",
-    "__functional_03": "cpp",
-    "__hash_table": "cpp",
-    "__tree": "cpp",
-    "bitset": "cpp",
-    "__bit_reference": "cpp",
-    "__mutex_base": "cpp",
-    "fstream": "cpp",
-    "ios": "cpp",
-    "__locale": "cpp",
-    "valarray": "cpp",
-    "freeglut_spaceball.c": "cpp",
-    "__tuple": "cpp",
-    "hash_map": "cpp",
-    "hash_set": "cpp",
-    "system_error": "cpp",
-    "__nullptr": "cpp",
-    "__functional_base": "cpp",
-    "__functional_base_03": "cpp",
-    "chrono": "cpp",
-    "ratio": "cpp",
-    "atomic": "cpp",
-    "locale": "cpp",
-    "string_view": "cpp",
-    "__string": "cpp",
-    "cstring": "cpp",
-    "iomanip": "cpp",
-    "cstdint": "cpp",
-    "forward_list": "cpp",
-    "mutex": "cpp",
-    "__hash": "cpp",
-    "__debug": "cpp",
-    "__threading_support": "cpp",
-    "any": "cpp",
-    "array": "cpp",
-    "cinttypes": "cpp",
-    "numeric": "cpp",
-    "__memory": "cpp",
-    "__errc": "cpp",
-    "__node_handle": "cpp",
-    "bit": "cpp",
-    "optional": "cpp",
-    "filesystem": "cpp",
-    "compare": "cpp",
-    "concepts": "cpp",
-    "xfacet": "cpp",
-    "xhash": "cpp",
-    "xiosbase": "cpp",
-    "xlocale": "cpp",
-    "xlocinfo": "cpp",
-    "xlocmon": "cpp",
-    "xlocnum": "cpp",
-    "xloctime": "cpp",
-    "xmemory": "cpp",
-    "xstddef": "cpp",
-    "xstring": "cpp",
-    "xtr1common": "cpp",
-    "xtree": "cpp",
-    "xutility": "cpp",
-    "xlocbuf": "cpp",
-    "xlocmes": "cpp",
-    "xmemory0": "cpp",
-    "memory_resource": "cpp",
-    "__bits": "cpp",
-    "__verbose_abort": "cpp",
-    "variant": "cpp"
-  },
-  "files.exclude": {
-    "Binaries/*build*": true,
-    "Binaries/Output": true,
-    "GDJS/Runtime-dist": true,
-    "docs": true,
-    "newIDE/electron-app/dist": true,
-    "newIDE/app/build": true,
-    "newIDE/app/resources/GDJS": true,
-    "newIDE/electron-app/app/www": true
-  },
-  // Support for Flowtype (for newIDE):
-  "javascript.validate.enable": false,
-  "flow.useNPMPackagedFlow": true,
+    "files.associations": {
+        "*.idl": "java",
+        "Fastfile": "ruby",
+        "iosfwd": "cpp",
+        "functional": "cpp",
+        "type_traits": "cpp",
+        "utility": "cpp",
+        "algorithm": "cpp",
+        "random": "cpp",
+        "__config": "cpp",
+        "cstddef": "cpp",
+        "exception": "cpp",
+        "initializer_list": "cpp",
+        "new": "cpp",
+        "stdexcept": "cpp",
+        "typeinfo": "cpp",
+        "*.tcc": "cpp",
+        "cctype": "cpp",
+        "clocale": "cpp",
+        "cmath": "cpp",
+        "complex": "cpp",
+        "cstdarg": "cpp",
+        "cstdio": "cpp",
+        "cstdlib": "cpp",
+        "ctime": "cpp",
+        "cwchar": "cpp",
+        "cwctype": "cpp",
+        "istream": "cpp",
+        "limits": "cpp",
+        "memory": "cpp",
+        "ostream": "cpp",
+        "sstream": "cpp",
+        "streambuf": "cpp",
+        "hashtable": "cpp",
+        "tuple": "cpp",
+        "unordered_map": "cpp",
+        "unordered_set": "cpp",
+        "__split_buffer": "cpp",
+        "deque": "cpp",
+        "iterator": "cpp",
+        "list": "cpp",
+        "map": "cpp",
+        "queue": "cpp",
+        "regex": "cpp",
+        "set": "cpp",
+        "stack": "cpp",
+        "string": "cpp",
+        "vector": "cpp",
+        "iostream": "cpp",
+        "__functional_03": "cpp",
+        "__hash_table": "cpp",
+        "__tree": "cpp",
+        "bitset": "cpp",
+        "__bit_reference": "cpp",
+        "__mutex_base": "cpp",
+        "fstream": "cpp",
+        "ios": "cpp",
+        "__locale": "cpp",
+        "valarray": "cpp",
+        "freeglut_spaceball.c": "cpp",
+        "__tuple": "cpp",
+        "hash_map": "cpp",
+        "hash_set": "cpp",
+        "system_error": "cpp",
+        "__nullptr": "cpp",
+        "__functional_base": "cpp",
+        "__functional_base_03": "cpp",
+        "chrono": "cpp",
+        "ratio": "cpp",
+        "atomic": "cpp",
+        "locale": "cpp",
+        "string_view": "cpp",
+        "__string": "cpp",
+        "cstring": "cpp",
+        "iomanip": "cpp",
+        "cstdint": "cpp",
+        "forward_list": "cpp",
+        "mutex": "cpp",
+        "__hash": "cpp",
+        "__debug": "cpp",
+        "__threading_support": "cpp",
+        "any": "cpp",
+        "array": "cpp",
+        "cinttypes": "cpp"
+    },
+    "files.exclude": {
+        "Binaries/*build*": true,
+        "Binaries/Output": true,
+        "Binaries/Packaging/GDevelop.app": true,
+        "ExtLibs/SFML": true,
+        "docs": true,
+        "GDJS/docs": true,
+        "GDCpp/docs": true,
+        "Core/docs": true,
+        "Extensions/CommonDialogs/dlib-18.16": true,
+        "newIDE/electron-app/dist": true,
+        "newIDE/app/build": true,
+        "newIDE/app/resources/GDJS": true,
+        "newIDE/electron-app/app/www": true
+    },
+    // Support for Flowtype (for newIDE):
+    "javascript.validate.enable": false,
+    "flow.useNPMPackagedFlow": true,

-  // Clang format styling (duplicated in scripts/CMakeClangUtils.txt)
-  "C_Cpp.clang_format_style": "{BasedOnStyle: Google, BinPackParameters: false, BinPackArguments: false}"
+    // Clang format styling (duplicated in scripts/CMakeClangUtils.txt)
+    "C_Cpp.clang_format_style": "{BasedOnStyle: Google, BinPackParameters: false, BinPackArguments: false}"
 }
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -1,100 +0,0 @@
-{
-  "version": "2.0.0",
-  "tasks": [
-    {
-      "type": "npm",
-      "script": "start",
-      "path": "newIDE/app/",
-      "group": "build",
-      "label": "Start development server",
-      "detail": "Starts the GDevelop development server.",
-      "problemMatcher": [
-        {
-          "owner": "cra",
-          "fileLocation": ["relative", "${workspaceFolder}/newIDE/app"],
-          "source": "create-react-app",
-          "applyTo": "allDocuments",
-          "pattern": [
-            {
-              "regexp": "^([^\\s].*?)$",
-              "file": 1
-            },
-            {
-              "regexp": "^  Line\\s+(\\d+):\\s+(.*)\\s\\s+(.*)$",
-              "line": 1,
-              "message": 2,
-              "code": 3,
-              "loop": true
-            }
-          ],
-          "background": {
-            "activeOnStart": true,
-            "beginsPattern": "^(?:Compiled with warnings\\.|Compiled successfully!)$",
-            "endsPattern": "^(?:Search for the keywords to learn more about each warning\\.|Note that the development build is not optimized\\.)$"
-          }
-        }
-      ],
-      "presentation": {
-        "reveal": "silent"
-      },
-      "isBackground": true,
-      "runOptions": { "instanceLimit": 1, "runOn": "folderOpen" }
-    },
-    {
-      "type": "npm",
-      "script": "start",
-      "path": "newIDE/electron-app/",
-      "group": "build",
-      "problemMatcher": [],
-      "label": "Start electron app",
-      "detail": "Starts the development local version of GDevelop."
-    },
-    {
-      "type": "npm",
-      "script": "build",
-      "path": "GDevelop.js/",
-      "group": "build",
-      "problemMatcher": [],
-      "label": "Build GDevelop.js",
-      "detail": "Builds GDCore for newIDE."
-    },
-    {
-      "type": "npm",
-      "script": "format",
-      "path": "newIDE/app/",
-      "problemMatcher": [],
-      "label": "Format newIDE",
-      "detail": "Run auto-formatting (with Prettier) for the newIDE/app directory."
-    },
-    {
-      "type": "npm",
-      "script": "test",
-      "path": "newIDE/app/",
-      "group": {
-        "kind": "test",
-        "isDefault": true
-      },
-      "problemMatcher": [],
-      "label": "Run newIDE tests",
-      "detail": "Run tests for newIDE."
-    },
-    {
-      "type": "typescript",
-      "tsconfig": "tsconfig.json",
-      "option": "watch",
-      "problemMatcher": ["$tsc-watch"],
-      "group": "test",
-      "label": "GDJS TS Check",
-      "detail": "Runs a types check on the GDJS Runtime."
-    },
-    {
-      "type": "npm",
-      "script": "test",
-      "path": "GDJS/",
-      "group": "test",
-      "problemMatcher": [],
-      "label": "Run GDJS tests",
-      "detail": "Run tests for GDJS."
-    }
-  ]
-}
--- a/Binaries/.directory
+++ b/Binaries/.directory
@@ -0,0 +1,6 @@
+[Dolphin]
+Timestamp=2015,4,21,21,49,19
+Version=3
+
+[Settings]
+HiddenFilesShown=true
--- a/Binaries/README.md
+++ b/Binaries/README.md
@@ -1,3 +1,4 @@
-This is the directory where native or WebAssembly binaries of the C++ code of GDCore and GDJS are produced.
+This is the directory where native/WebAssembly binaries from GDCore, GDCpp and GDJS are produced.

-See GDevelop.js README for the instructions to compile after a change in the C++ source code.
+In particular, the extensions and/or the JS platform files will be
+created into Output/Release_*OSNAME* with *OSNAME* being Windows, Linux or Darwin.
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,100 +1,98 @@
-# This is the CMake file used to build GDevelop.
-# For more information, see the README.md file.
+#This is the CMake file used to build GDevelop.
+#For more information, see the Readme.md file.

-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 2.6)
+cmake_policy(SET CMP0011 NEW)

 # Add utility functions
 include(scripts/CMakeClangUtils.txt) # To add clang-format and clang-tidy support to a target

 # Macro for defining an option
 macro(gd_set_option var default type docstring)
-	if(NOT DEFINED ${var})
-		set(${var} ${default})
-	endif()
-	set(${var} ${${var}} CACHE ${type} ${docstring} FORCE)
+    if(NOT DEFINED ${var})
+        set(${var} ${default})
+    endif()
+    set(${var} ${${var}} CACHE ${type} ${docstring} FORCE)
 endmacro()
-
-# Set options
-gd_set_option(BUILD_CORE TRUE BOOL "TRUE to build GDevelop Core library")
+gd_set_option(BUILD_CORE TRUE BOOL "TRUE to build GDevelop Core library, FALSE to use the already compiled binaries")
+gd_set_option(BUILD_GDCPP TRUE BOOL "TRUE to build GDevelop C++ Platform")
 gd_set_option(BUILD_GDJS TRUE BOOL "TRUE to build GDevelop JS Platform")
 gd_set_option(BUILD_EXTENSIONS TRUE BOOL "TRUE to build the extensions")
-gd_set_option(BUILD_TESTS TRUE BOOL "TRUE to build the tests")
+gd_set_option(BUILD_TESTS FALSE BOOL "TRUE to build the tests")
+gd_set_option(FULL_VERSION_NUMBER TRUE BOOL "TRUE to build GDevelop with its full version number (lastest tag + commit hash), FALSE to only use the lastest tag (avoid rebulding many source file when developping)")

 # Disable deprecated code
-set(NO_GUI TRUE CACHE BOOL "" FORCE) # Force disable old GUI related code.
+set(NO_GUI TRUE CACHE BOOL "" FORCE) #Force disable old GUI related code.

-# Setting up installation directory, for Linux (has to be done before "project" command).
-if(NOT WIN32)
-	if(NOT APPLE)
-		gd_set_option(GD_INSTALL_PREFIX "/opt/gdevelop/" STRING "The directory where GDevelop should be installed")
-	else()
-		gd_set_option(GD_INSTALL_PREFIX "." STRING "The directory where GDevelop should be installed")
-	endif()
+#Setting up installation directory, for Linux (has to be done before "project" command).
+IF(NOT WIN32)
+	if (NOT APPLE)
+	gd_set_option(GD_INSTALL_PREFIX "/opt/gdevelop/" STRING "The directory where GDevelop should be installed")
+	ELSE()
+	gd_set_option(GD_INSTALL_PREFIX "." STRING "The directory where GDevelop should be installed")
+	ENDIF()

-	# As we embed SFML, prevent it to be installed system-wide
+	#As we embed SFML, prevent it to be installed system-wide
 	set(CMAKE_INSTALL_PREFIX "${GD_INSTALL_PREFIX}/useless")
-endif()
+ENDIF()

 project(GDevelop)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
-if(NOT WIN32 AND NOT APPLE AND NOT BUILD_TESTS)
-	set(CMAKE_SKIP_BUILD_RPATH TRUE) # Avoid errors when packaging for linux.
-endif()
-if(APPLE)
+IF(NOT WIN32 AND NOT APPLE AND NOT BUILD_TESTS)
+	SET(CMAKE_SKIP_BUILD_RPATH  TRUE) #Avoid errors when packaging for linux.
+ENDIF()
+IF(APPLE)
 	set(CMAKE_MACOSX_RPATH 1)
 	set(CMAKE_INSTALL_RPATH_USE_LINK_PATH FALSE)
 	set(CMAKE_INSTALL_RPATH ".")
 	set(CMAKE_BUILD_WITH_INSTALL_RPATH TRUE)
-	add_compile_options(
-		-D_WCHAR_H_CPLUSPLUS_98_CONFORMANCE_
-		-Wno-potentially-evaluated-expression)
-endif()
-# Sanity checks
-if("${CMAKE_BUILD_TYPE}" STREQUAL "")
-	message(STATUS "CMAKE_BUILD_TYPE is empty, assuming build type is Release")
-	set(CMAKE_BUILD_TYPE Release)
-endif()
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_WCHAR_H_CPLUSPLUS_98_CONFORMANCE_")
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-potentially-evaluated-expression")
+ENDIF()

-if("${CMAKE_BUILD_TYPE}" STREQUAL "Release" AND NOT WIN32 AND CMAKE_COMPILER_IS_GNUCXX)
-	set(CMAKE_SHARED_LINKER_FLAGS "-s") # Force stripping to avoid errors when packaging for linux.
-endif()
+#Sanity checks
+IF ("${CMAKE_BUILD_TYPE}" STREQUAL "")
+	message( "CMAKE_BUILD_TYPE is empty, assuming build type is Release" )
+	set(CMAKE_BUILD_TYPE Release)
+ENDIF()
+IF (EMSCRIPTEN)
+	set(BUILD_GDCPP FALSE CACHE BOOL "" FORCE) #Force disable GDC++ when compiling with emscripten.
+ENDIF()
+
+IF("${CMAKE_BUILD_TYPE}" STREQUAL "Release" AND NOT WIN32 AND CMAKE_COMPILER_IS_GNUCXX)
+	SET(CMAKE_SHARED_LINKER_FLAGS "-s") #Force stripping to avoid errors when packaging for linux.
+ENDIF()

 #Activate C++11
-set(CMAKE_CXX_STANDARD 11) # Upgrading to C++17 would need to remove usage of bind2nd (should be easy).
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-
-# Mark some warnings as errors
-if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
-	# Activate as much warnings as possible to avoid errors like
-	# uninitialized variables or other hard to debug bugs.
-	add_compile_options(
-		-Wall
-		-Wno-unknown-warning-option
-		-Wno-reorder-ctor
-		-Wno-reorder
-		-Wno-pessimizing-move
-		-Wno-unused-variable
-		-Wno-unused-private-field
-
-		# Make as much warnings considered as errors as possible (only one for now).
-		-Werror=return-stack-address
-		-Werror=return-type)
+include(CheckCXXCompilerFlag)
+CHECK_CXX_COMPILER_FLAG("-std=gnu++11" COMPILER_SUPPORTS_CXX11)
+CHECK_CXX_COMPILER_FLAG("-std=gnu++0x" COMPILER_SUPPORTS_CXX0X)
+if(COMPILER_SUPPORTS_CXX11)
+       set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")
+elseif(COMPILER_SUPPORTS_CXX0X)
+       set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++0x")
+else()
+    message(FATAL_ERROR "The compiler ${CMAKE_CXX_COMPILER} has no C++11 support (with GNU extensions). Please use a different C++ compiler.")
 endif()

-# Define common directories:
+#Define common directories:
 set(GD_base_dir ${CMAKE_CURRENT_SOURCE_DIR})

-# Add all the CMakeLists:
-add_subdirectory(ExtLibs)
-if(BUILD_CORE)
-	add_subdirectory(Core)
-endif()
-if(BUILD_GDJS)
-	add_subdirectory(GDJS)
-endif()
-if(EMSCRIPTEN)
-	add_subdirectory(GDevelop.js)
-endif()
-if(BUILD_EXTENSIONS)
-	add_subdirectory(Extensions)
-endif()
+#Add all the CMakeLists:
+ADD_SUBDIRECTORY(Version)
+ADD_SUBDIRECTORY(ExtLibs)
+IF(BUILD_CORE)
+	ADD_SUBDIRECTORY(Core)
+ENDIF()
+IF(BUILD_GDJS)
+	ADD_SUBDIRECTORY(GDJS)
+ENDIF()
+IF(BUILD_GDCPP)
+	ADD_SUBDIRECTORY(GDCpp)
+ENDIF()
+IF(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/GDevelop.js/CMakeLists.txt" AND EMSCRIPTEN)
+	ADD_SUBDIRECTORY(GDevelop.js)
+ENDIF()
+IF(BUILD_EXTENSIONS)
+	ADD_SUBDIRECTORY(Extensions)
+ENDIF()
--- a/Core/CMakeLists.txt
+++ b/Core/CMakeLists.txt
@@ -1,98 +1,88 @@
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 2.6)
+cmake_policy(SET CMP0015 NEW)

 project(GDCore)

-set(CMAKE_C_USE_RESPONSE_FILE_FOR_OBJECTS 1) # Force use response file: useful for Ninja build system on Windows.
-set(CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS 1)
-set(CMAKE_C_USE_RESPONSE_FILE_FOR_INCLUDES 1)
-set(CMAKE_CXX_USE_RESPONSE_FILE_FOR_INCLUDES 1)
+SET(CMAKE_C_USE_RESPONSE_FILE_FOR_OBJECTS 1) #Force use response file: useful for Ninja build system on Windows.
+SET(CMAKE_CXX_USE_RESPONSE_FILE_FOR_OBJECTS 1)
+SET(CMAKE_C_USE_RESPONSE_FILE_FOR_INCLUDES 1)
+SET(CMAKE_CXX_USE_RESPONSE_FILE_FOR_INCLUDES 1)

-# Define common directories:
+#Define common directories:
 set(GDCORE_include_dir ${GD_base_dir}/Core PARENT_SCOPE)
 set(GDCORE_lib_dir ${GD_base_dir}/Binaries/Output/${CMAKE_BUILD_TYPE}_${CMAKE_SYSTEM_NAME} PARENT_SCOPE)

-# Dependencies on external libraries:
-#
+#Dependencies on external libraries:
+###
+include_directories(${sfml_include_dir})

-# Defines
-#
-add_definitions(-DGD_IDE_ONLY)
-if(EMSCRIPTEN)
-	add_definitions(-DEMSCRIPTEN)
-endif()
-if("${CMAKE_BUILD_TYPE}" MATCHES "Debug")
-	add_definitions(-DDEBUG)
-else()
-	add_definitions(-DRELEASE)
-endif()
+#Defines
+###
+add_definitions( -DGD_IDE_ONLY )
+IF (EMSCRIPTEN)
+	add_definitions( -DEMSCRIPTEN )
+ENDIF()
+IF(CMAKE_BUILD_TYPE MATCHES "Debug")
+	add_definitions( -DDEBUG )
+ELSE()
+	add_definitions( -DRELEASE )
+ENDIF()

-if(WIN32)
-	add_definitions(-DWINDOWS)
-	add_definitions("-DGD_CORE_API=__declspec(dllexport)")
-	add_definitions(-D__GNUWIN32__)
-else()
-	if(APPLE)
-		add_definitions(-DMACOS)
-	else()
-		add_definitions(-DLINUX)
-	endif()
-	add_definitions(-DGD_API=)
-	add_definitions(-DGD_CORE_API=)
-endif()
+IF(WIN32)
+	add_definitions( -DWINDOWS )
+	add_definitions( "-DGD_CORE_API=__declspec(dllexport)" )
+	add_definitions( -D__GNUWIN32__ )
+ELSE()
+    IF(APPLE)
+    add_definitions( -DMACOS )
+    ELSE()
+	add_definitions( -DLINUX )
+	ENDIF()
+	add_definitions( -DGD_API= )
+	add_definitions( -DGD_CORE_API= )
+ENDIF(WIN32)

-# The target
-#
+#The target
+###
 include_directories(.)
-file(
-	GLOB_RECURSE
-	source_files
-	GDCore/*)
+file(GLOB_RECURSE source_files GDCore/*)

-file(
-	GLOB_RECURSE
-	formatted_source_files
-	tests/*
-	GDCore/Events/*
-	GDCore/Extensions/*
-	GDCore/IDE/*
-	GDCore/Project/*
-	GDCore/Serialization/*
-	GDCore/Tools/*)
-list(
-	REMOVE_ITEM
-	formatted_source_files
-	"${CMAKE_CURRENT_SOURCE_DIR}/GDCore/IDE/Dialogs/GDCoreDialogs.cpp"
-	"${CMAKE_CURRENT_SOURCE_DIR}/GDCore/IDE/Dialogs/GDCoreDialogs.h"
-	"${CMAKE_CURRENT_SOURCE_DIR}/GDCore/IDE/Dialogs/GDCoreDialogs_dialogs_bitmaps.cpp")
+file(GLOB_RECURSE formatted_source_files tests/* GDCore/Events/* GDCore/Extensions/* GDCore/IDE/* GDCore/Project/* GDCore/Serialization/* GDCore/Tools/*)
+list(REMOVE_ITEM formatted_source_files "${CMAKE_CURRENT_SOURCE_DIR}/GDCore/IDE/Dialogs/GDCoreDialogs.cpp" "${CMAKE_CURRENT_SOURCE_DIR}/GDCore/IDE/Dialogs/GDCoreDialogs.h" "${CMAKE_CURRENT_SOURCE_DIR}/GDCore/IDE/Dialogs/GDCoreDialogs_dialogs_bitmaps.cpp")
 gd_add_clang_utils(GDCore "${formatted_source_files}")

-if(EMSCRIPTEN)
-	# Emscripten treats all libraries as static libraries
-	add_library(GDCore STATIC ${source_files})
-else()
-	add_library(GDCore SHARED ${source_files})
-endif()
-if(EMSCRIPTEN)
+add_library(GDCore SHARED ${source_files})
+add_dependencies(GDCore GDVersion)
+IF(EMSCRIPTEN)
 	set_target_properties(GDCore PROPERTIES SUFFIX ".bc")
-elseif(WIN32)
+ELSEIF(WIN32)
 	set_target_properties(GDCore PROPERTIES PREFIX "")
-else()
+ELSE()
 	set_target_properties(GDCore PROPERTIES PREFIX "lib")
-endif()
+ENDIF()
 set(LIBRARY_OUTPUT_PATH ${GD_base_dir}/Binaries/Output/${CMAKE_BUILD_TYPE}_${CMAKE_SYSTEM_NAME})
 set(ARCHIVE_OUTPUT_PATH ${GD_base_dir}/Binaries/Output/${CMAKE_BUILD_TYPE}_${CMAKE_SYSTEM_NAME})
 set(RUNTIME_OUTPUT_PATH ${GD_base_dir}/Binaries/Output/${CMAKE_BUILD_TYPE}_${CMAKE_SYSTEM_NAME})

-# Tests
-#
+#Linker files
+###
+IF(EMSCRIPTEN)
+	#Nothing.
+ELSE()
+	target_link_libraries(GDCore ${sfml_LIBRARIES})
+ENDIF()
+
+#Tests
+###
 if(BUILD_TESTS)
 	file(
-		GLOB_RECURSE
-		test_source_files
-		tests/*)
+	    GLOB_RECURSE
+	    test_source_files
+	    tests/*
+	)

 	add_executable(GDCore_tests ${test_source_files})
-	set_target_properties(GDCore_tests PROPERTIES BUILD_WITH_INSTALL_RPATH FALSE) # Allow finding dependencies directly from build path on Mac OS X.
+	set_target_properties(GDCore_tests PROPERTIES BUILD_WITH_INSTALL_RPATH FALSE) #Allow finding dependencies directly from build path on Mac OS X.
 	target_link_libraries(GDCore_tests GDCore)
-	target_link_libraries(GDCore_tests ${CMAKE_DL_LIBS})
+	target_link_libraries(GDCore_tests ${sfml_LIBRARIES})
 endif()
--- a/Core/GDCore/CommonTools.h
+++ b/Core/GDCore/CommonTools.h
@@ -13,6 +13,7 @@
 #include <string>
 #include <vector>
 #include "Utf8/utf8.h"
+#include <SFML/System/String.hpp>

 #ifdef __GNUC__
    #define GD_DEPRECATED    __attribute__((deprecated))
--- a/Core/GDCore/DocMainPage.h
+++ b/Core/GDCore/DocMainPage.h
@@ -14,8 +14,9 @@
 *
 * \section other Other documentations
 *
- * GDevelop is architectured around a `Core` (this library), a game engine (`GDJS`) and extensions (`Extensions` folder). The editor (`newIDE` folder) is using all of these libraries.
+ * GDevelop is architectured around a `Core` (this library), platforms (`GDJS`, `GDCpp`) and extensions (`Extensions` folder). The editor (`newIDE` folder) is using all of these libraries.
 *
+ *  - [Open GDevelop C++ Platform documentation](../GDCpp Documentation/index.html)
 *  - [Open GDevelop JS Platform documentation](../GDJS Documentation/index.html)
 *  - <a href="https://github.com/4ian/GDevelop/blob/master/newIDE/README.md">Getting started with the editor</a>
 *  - <a href="https://github.com/4ian/GDevelop/blob/master/newIDE/README-extensions.md">Getting started with the extensions</a>
--- a/Core/GDCore/Events/Builtin/AsyncEvent.cpp
+++ b/Core/GDCore/Events/Builtin/AsyncEvent.cpp
@@ -1,36 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the MIT License.
- */
-
-#include "AsyncEvent.h"
-#include "GDCore/CommonTools.h"
-#include "GDCore/Events/CodeGeneration/EventsCodeGenerationContext.h"
-#include "GDCore/Events/CodeGeneration/EventsCodeGenerator.h"
-#include "GDCore/Events/Serialization.h"
-#include "GDCore/Serialization/SerializerElement.h"
-
-using namespace std;
-
-namespace gd {
-
-AsyncEvent::AsyncEvent() : BaseEvent() {}
-
-AsyncEvent::~AsyncEvent(){};
-
-vector<const gd::InstructionsList *> AsyncEvent::GetAllActionsVectors() const {
-  vector<const gd::InstructionsList *> allActions;
-  allActions.push_back(&actions);
-
-  return allActions;
-}
-
-vector<gd::InstructionsList *> AsyncEvent::GetAllActionsVectors() {
-  vector<gd::InstructionsList *> allActions;
-  allActions.push_back(&actions);
-
-  return allActions;
-}
-
-} // namespace gd
--- a/Core/GDCore/Events/Builtin/AsyncEvent.h
+++ b/Core/GDCore/Events/Builtin/AsyncEvent.h
@@ -1,61 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the MIT License.
- */
-
-#ifndef GDCORE_ASYNCEVENT_H
-#define GDCORE_ASYNCEVENT_H
-#include "GDCore/Events/Event.h"
-#include "GDCore/Events/EventsList.h"
-#include "GDCore/Events/Instruction.h"
-#include "GDCore/Events/InstructionsList.h"
-namespace gd {
-class Instruction;
-class Project;
-} // namespace gd
-
-namespace gd {
-
-/**
- * \brief Internal event for asynchronous actions.
- * This event gets added internally to the events tree when an
- * asynchronous action is used.
- */
-class GD_CORE_API AsyncEvent : public gd::BaseEvent {
-public:
-  AsyncEvent();
-  AsyncEvent(const gd::Instruction &asyncAction_,
-             const gd::InstructionsList &actions_,
-             const gd::EventsList &subEvents_)
-      : asyncAction(asyncAction_), actions(actions_), subEvents(subEvents_) {
-    SetType("BuiltinAsync::Async");
-  };
-  virtual ~AsyncEvent();
-  virtual gd::AsyncEvent *Clone() const { return new AsyncEvent(*this); }
-
-  virtual bool IsExecutable() const { return true; }
-
-  virtual bool CanHaveSubEvents() const { return true; }
-  virtual const gd::EventsList &GetSubEvents() const { return subEvents; };
-  virtual gd::EventsList &GetSubEvents() { return subEvents; };
-
-  const gd::InstructionsList &GetActions() const { return actions; };
-  gd::InstructionsList &GetActions() { return actions; };
-
-  const gd::Instruction &GetInstruction() const { return asyncAction; };
-  gd::Instruction &GetInstruction() { return asyncAction; };
-
-  virtual std::vector<const gd::InstructionsList *>
-  GetAllActionsVectors() const;
-  virtual std::vector<gd::InstructionsList *> GetAllActionsVectors();
-
-private:
-  gd::Instruction asyncAction;
-  gd::InstructionsList actions;
-  EventsList subEvents;
-};
-
-} // namespace gd
-
-#endif // GDCORE_STANDARDEVENT_H
--- a/Core/GDCore/Events/Builtin/CommentEvent.cpp
+++ b/Core/GDCore/Events/Builtin/CommentEvent.cpp
@@ -12,22 +12,6 @@ using namespace std;

 namespace gd {

-vector<gd::String> CommentEvent::GetAllSearchableStrings() const {
-  vector<gd::String> allSearchableStrings;
-
-  allSearchableStrings.push_back(com1);
-  allSearchableStrings.push_back(com2);  ///< Com2 is deprecated
-
-  return allSearchableStrings;
-}
-
-bool CommentEvent::ReplaceAllSearchableStrings(
-    std::vector<gd::String> newSearchableString) {
-  if (newSearchableString[0] == com1) return false;
-  SetComment(newSearchableString[0]);
-  return true;
-}
-
 void CommentEvent::SerializeTo(SerializerElement &element) const {
  element.AddChild("color")
      .SetAttribute("r", r)
@@ -38,7 +22,7 @@ void CommentEvent::SerializeTo(SerializerElement &element) const {
      .SetAttribute("textB", textB);

  element.AddChild("comment").SetValue(com1);
-  if (!com2.empty()) element.AddChild("comment2").SetValue(com2);
+  element.AddChild("comment2").SetValue(com2);
 }

 void CommentEvent::UnserializeFrom(gd::Project &project,
@@ -53,9 +37,7 @@ void CommentEvent::UnserializeFrom(gd::Project &project,
  textB = colorElement.GetIntAttribute("textB");

  com1 = element.GetChild("comment", 0, "Com1").GetValue().GetString();
-  if (element.HasChild("comment2")) {
-    com2 = element.GetChild("comment2", 0, "Com2").GetValue().GetString();
-  }
+  com2 = element.GetChild("comment2", 0, "Com2").GetValue().GetString();
 }

 }  // namespace gd
--- a/Core/GDCore/Events/Builtin/CommentEvent.h
+++ b/Core/GDCore/Events/Builtin/CommentEvent.h
@@ -7,11 +7,10 @@
 #define COMMENTEVENT_H

 #include "GDCore/Events/Event.h"
-#include "GDCore/Events/EventsList.h"
 namespace gd {
 class Layout;
 class Project;
-}  // namespace gd
+}

 namespace gd {

@@ -46,10 +45,6 @@ class GD_CORE_API CommentEvent : public gd::BaseEvent {
  const gd::String& GetComment() const { return com1; }
  void SetComment(const gd::String& comment) { com1 = comment; }

-  virtual std::vector<gd::String> GetAllSearchableStrings() const;
-  virtual bool ReplaceAllSearchableStrings(
-      std::vector<gd::String> newSearchableString);
-
  virtual void SerializeTo(SerializerElement& element) const;
  virtual void UnserializeFrom(gd::Project& project,
                               const SerializerElement& element);
--- a/Core/GDCore/Events/Builtin/ForEachChildVariableEvent.cpp
+++ b/Core/GDCore/Events/Builtin/ForEachChildVariableEvent.cpp
@@ -1,108 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the MIT License.
- */
-
-#include "ForEachChildVariableEvent.h"
-#include "GDCore/Events/Serialization.h"
-#include "GDCore/Serialization/SerializerElement.h"
-
-using namespace std;
-
-namespace gd {
-
-ForEachChildVariableEvent::ForEachChildVariableEvent()
-    : BaseEvent(), valueIteratorVariableName("child"), keyIteratorVariableName(""), iterableVariableName("") {}
-
-vector<gd::InstructionsList*> ForEachChildVariableEvent::GetAllConditionsVectors() {
-  vector<gd::InstructionsList*> allConditions;
-  allConditions.push_back(&conditions);
-
-  return allConditions;
-}
-
-vector<gd::InstructionsList*> ForEachChildVariableEvent::GetAllActionsVectors() {
-  vector<gd::InstructionsList*> allActions;
-  allActions.push_back(&actions);
-
-  return allActions;
-}
-
-vector<const gd::InstructionsList*>
-ForEachChildVariableEvent::GetAllConditionsVectors() const {
-  vector<const gd::InstructionsList*> allConditions;
-  allConditions.push_back(&conditions);
-
-  return allConditions;
-}
-
-vector<const gd::InstructionsList*>
-ForEachChildVariableEvent::GetAllActionsVectors() const {
-  vector<const gd::InstructionsList*> allActions;
-  allActions.push_back(&actions);
-
-  return allActions;
-}
-
-vector<pair<gd::Expression*, gd::ParameterMetadata> >
-    ForEachChildVariableEvent::GetAllExpressionsWithMetadata() {
-  vector<pair<gd::Expression*, gd::ParameterMetadata> >
-      allExpressionsWithMetadata;
-  auto metadata = gd::ParameterMetadata().SetType("scenevar");
-  allExpressionsWithMetadata.push_back(
-      std::make_pair(&iterableVariableName, metadata));
-  allExpressionsWithMetadata.push_back(
-      std::make_pair(&valueIteratorVariableName, metadata));
-  allExpressionsWithMetadata.push_back(
-      std::make_pair(&keyIteratorVariableName, metadata));
-
-  return allExpressionsWithMetadata;
-}
-vector<pair<const gd::Expression*, const gd::ParameterMetadata> >
-    ForEachChildVariableEvent::GetAllExpressionsWithMetadata() const {
-  vector<pair<const gd::Expression*, const gd::ParameterMetadata> >
-      allExpressionsWithMetadata;
-  auto metadata = gd::ParameterMetadata().SetType("scenevar");
-  allExpressionsWithMetadata.push_back(
-      std::make_pair(&iterableVariableName, metadata));
-  allExpressionsWithMetadata.push_back(
-      std::make_pair(&valueIteratorVariableName, metadata));
-  allExpressionsWithMetadata.push_back(
-      std::make_pair(&keyIteratorVariableName, metadata));
-
-  return allExpressionsWithMetadata;
-}
-
-void ForEachChildVariableEvent::SerializeTo(SerializerElement& element) const {
-  element.AddChild("iterableVariableName").SetValue(iterableVariableName.GetPlainString());
-  element.AddChild("valueIteratorVariableName").SetValue(valueIteratorVariableName.GetPlainString());
-  element.AddChild("keyIteratorVariableName").SetValue(keyIteratorVariableName.GetPlainString());
-  gd::EventsListSerialization::SerializeInstructionsTo(
-      conditions, element.AddChild("conditions"));
-  gd::EventsListSerialization::SerializeInstructionsTo(
-      actions, element.AddChild("actions"));
-
-  if (!events.IsEmpty())
-    gd::EventsListSerialization::SerializeEventsTo(events,
-                                                  element.AddChild("events"));
-}
-
-void ForEachChildVariableEvent::UnserializeFrom(gd::Project& project,
-                                            const SerializerElement& element) {
-  iterableVariableName = element.GetChild("iterableVariableName", 0, "").GetValue().GetString();
-  valueIteratorVariableName = element.GetChild("valueIteratorVariableName", 0, "").GetValue().GetString();
-  keyIteratorVariableName = element.GetChild("keyIteratorVariableName", 0, "").GetValue().GetString();
-  gd::EventsListSerialization::UnserializeInstructionsFrom(
-      project, conditions, element.GetChild("conditions", 0, "Conditions"));
-  gd::EventsListSerialization::UnserializeInstructionsFrom(
-      project, actions, element.GetChild("actions", 0, "Actions"));
-
-  events.Clear();
-  if (element.HasChild("events", "Events")) {
-    gd::EventsListSerialization::UnserializeEventsFrom(
-        project, events, element.GetChild("events", 0, "Events"));
-  }
-}
-
-}  // namespace gd
--- a/Core/GDCore/Events/Builtin/ForEachChildVariableEvent.h
+++ b/Core/GDCore/Events/Builtin/ForEachChildVariableEvent.h
@@ -1,116 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the MIT License.
- */
-
-#ifndef FOREACHCHILDVARIABLEEVENT_H
-#define FOREACHCHILDVARIABLEEVENT_H
-#include "GDCore/Events/Event.h"
-#include "GDCore/Events/EventsList.h"
-#include "GDCore/Events/Expression.h"
-namespace gd {
-class Instruction;
-class Project;
-class Layout;
-}  // namespace gd
-
-namespace gd {
-
-/**
- * \brief Event repeated for each every child of a structure variable.
- */
-class GD_CORE_API ForEachChildVariableEvent : public gd::BaseEvent {
- public:
-  ForEachChildVariableEvent();
-  virtual ~ForEachChildVariableEvent(){};
-  virtual gd::ForEachChildVariableEvent* Clone() const {
-    return new ForEachChildVariableEvent(*this);
-  }
-
-  virtual bool IsExecutable() const { return true; }
-
-  virtual bool CanHaveSubEvents() const { return true; }
-  virtual const gd::EventsList& GetSubEvents() const { return events; };
-  virtual gd::EventsList& GetSubEvents() { return events; };
-
-  const gd::InstructionsList& GetConditions() const { return conditions; };
-  gd::InstructionsList& GetConditions() { return conditions; };
-
-  const gd::InstructionsList& GetActions() const { return actions; };
-  gd::InstructionsList& GetActions() { return actions; };
-
-  /**
-   * \brief Get the iterable variable name attached to the event.
-   *
-   * It is the structure variable that will be iterated on.
-   */
-  const gd::String& GetIterableVariableName() const { return iterableVariableName.GetPlainString(); };
-
-  /**
-   * \brief Set the iterable variable name attached to the event.
-   *
-   * It is the structure variable that will be iterated on.
-   */
-  void SetIterableVariableName(gd::String newName) { iterableVariableName = newName; };
-
-  /**
-   * \brief Get the value iterator variable attached to the event.
-   *
-   * It is the variable that will contain the value of the
-   * iterable's child being iterated on.
-   */
-  const gd::String& GetValueIteratorVariableName() const { return valueIteratorVariableName.GetPlainString(); };
-
-  /**
-   * \brief Set the value iterator variable attached to the event.
-   *
-   * It is the variable that will contain the value of the
-   * iterable's child being iterated on.
-   */
-  void SetValueIteratorVariableName(gd::String newName) { valueIteratorVariableName = newName; };
-
-  /**
-   * \brief Get the key iterator variable attached to the event.
-   *
-   * It is the variable that will contain the name of the
-   * iterable's child being iterated on.
-   */
-  const gd::String& GetKeyIteratorVariableName() const { return keyIteratorVariableName.GetPlainString(); };
-
-  /**
-   * \brief Set the key iterator variable attached to the event.
-   *
-   * It is the variable that will contain the name of the
-   * iterable's child being iterated on.
-   */
-  void SetKeyIteratorVariableName(gd::String newName) { keyIteratorVariableName = newName; };
-
-  virtual std::vector<const gd::InstructionsList*> GetAllConditionsVectors()
-      const;
-  virtual std::vector<const gd::InstructionsList*> GetAllActionsVectors() const;
-
-  virtual std::vector<gd::InstructionsList*> GetAllConditionsVectors();
-  virtual std::vector<gd::InstructionsList*> GetAllActionsVectors();
-
-  virtual std::vector<std::pair<const gd::Expression*, const gd::ParameterMetadata> >
-        GetAllExpressionsWithMetadata() const;
-  virtual std::vector<std::pair<gd::Expression*, gd::ParameterMetadata> >
-        GetAllExpressionsWithMetadata();
-
-  virtual void SerializeTo(SerializerElement& element) const;
-  virtual void UnserializeFrom(gd::Project& project,
-                               const SerializerElement& element);
-
- private:
-  gd::Expression valueIteratorVariableName;
-  gd::Expression keyIteratorVariableName;
-  gd::Expression iterableVariableName;
-  gd::InstructionsList conditions;
-  gd::InstructionsList actions;
-  gd::EventsList events;
-};
-
-}  // namespace gd
-
-#endif  // FOREACHEVENT_H
--- a/Core/GDCore/Events/Builtin/ForEachEvent.cpp
+++ b/Core/GDCore/Events/Builtin/ForEachEvent.cpp
@@ -5,6 +5,10 @@
 */

 #include "ForEachEvent.h"
+#include <iostream>
+#include "GDCore/Events/CodeGeneration/EventsCodeGenerationContext.h"
+#include "GDCore/Events/CodeGeneration/EventsCodeGenerator.h"
+#include "GDCore/Events/CodeGeneration/ExpressionsCodeGeneration.h"
 #include "GDCore/Events/Serialization.h"
 #include "GDCore/Events/Tools/EventsCodeNameMangler.h"
 #include "GDCore/Serialization/SerializerElement.h"
@@ -15,7 +19,7 @@ using namespace std;
 namespace gd {

 ForEachEvent::ForEachEvent()
-    : BaseEvent(), objectsToPick("") {}
+    : BaseEvent(), objectsToPick(""), objectsToPickSelected(false) {}

 vector<gd::InstructionsList*> ForEachEvent::GetAllConditionsVectors() {
  vector<gd::InstructionsList*> allConditions;
@@ -31,17 +35,12 @@ vector<gd::InstructionsList*> ForEachEvent::GetAllActionsVectors() {
  return allActions;
 }

-vector<pair<gd::Expression*, gd::ParameterMetadata> >
-    ForEachEvent::GetAllExpressionsWithMetadata() {
-  vector<pair<gd::Expression*, gd::ParameterMetadata> >
-      allExpressionsWithMetadata;
-  auto metadata = gd::ParameterMetadata().SetType("object");
-  allExpressionsWithMetadata.push_back(
-      std::make_pair(&objectsToPick, metadata));
+vector<gd::Expression*> ForEachEvent::GetAllExpressions() {
+  vector<gd::Expression*> allExpressions;
+  allExpressions.push_back(&objectsToPick);

-  return allExpressionsWithMetadata;
+  return allExpressions;
 }
-
 vector<const gd::InstructionsList*> ForEachEvent::GetAllConditionsVectors()
    const {
  vector<const gd::InstructionsList*> allConditions;
@@ -57,15 +56,11 @@ vector<const gd::InstructionsList*> ForEachEvent::GetAllActionsVectors() const {
  return allActions;
 }

-vector<pair<const gd::Expression*, const gd::ParameterMetadata> >
-    ForEachEvent::GetAllExpressionsWithMetadata() const {
-  vector<pair<const gd::Expression*, const gd::ParameterMetadata> >
-      allExpressionsWithMetadata;
-  auto metadata = gd::ParameterMetadata().SetType("object");
-  allExpressionsWithMetadata.push_back(
-      std::make_pair(&objectsToPick, metadata));
+vector<const gd::Expression*> ForEachEvent::GetAllExpressions() const {
+  vector<const gd::Expression*> allExpressions;
+  allExpressions.push_back(&objectsToPick);

-  return allExpressionsWithMetadata;
+  return allExpressions;
 }

 void ForEachEvent::SerializeTo(SerializerElement& element) const {
@@ -74,10 +69,8 @@ void ForEachEvent::SerializeTo(SerializerElement& element) const {
      conditions, element.AddChild("conditions"));
  gd::EventsListSerialization::SerializeInstructionsTo(
      actions, element.AddChild("actions"));
-
-  if (!events.IsEmpty())
-    gd::EventsListSerialization::SerializeEventsTo(events,
-                                                  element.AddChild("events"));
+  gd::EventsListSerialization::SerializeEventsTo(events,
+                                                 element.AddChild("events"));
 }

 void ForEachEvent::UnserializeFrom(gd::Project& project,
@@ -88,12 +81,8 @@ void ForEachEvent::UnserializeFrom(gd::Project& project,
      project, conditions, element.GetChild("conditions", 0, "Conditions"));
  gd::EventsListSerialization::UnserializeInstructionsFrom(
      project, actions, element.GetChild("actions", 0, "Actions"));
-
-  events.Clear();
-  if (element.HasChild("events", "Events")) {
-    gd::EventsListSerialization::UnserializeEventsFrom(
-        project, events, element.GetChild("events", 0, "Events"));
-  }
+  gd::EventsListSerialization::UnserializeEventsFrom(
+      project, events, element.GetChild("events", 0, "Events"));
 }

 }  // namespace gd
--- a/Core/GDCore/Events/Builtin/ForEachEvent.h
+++ b/Core/GDCore/Events/Builtin/ForEachEvent.h
@@ -6,8 +6,6 @@

 #ifndef FOREACHEVENT_H
 #define FOREACHEVENT_H
-#include <vector>
-
 #include "GDCore/Events/Event.h"
 #include "GDCore/Events/EventsList.h"
 namespace gd {
@@ -52,13 +50,10 @@ class GD_CORE_API ForEachEvent : public gd::BaseEvent {
  virtual std::vector<const gd::InstructionsList*> GetAllConditionsVectors()
      const;
  virtual std::vector<const gd::InstructionsList*> GetAllActionsVectors() const;
-  virtual std::vector<std::pair<const gd::Expression*, const gd::ParameterMetadata> >
-      GetAllExpressionsWithMetadata() const;
-
+  virtual std::vector<const gd::Expression*> GetAllExpressions() const;
  virtual std::vector<gd::InstructionsList*> GetAllConditionsVectors();
  virtual std::vector<gd::InstructionsList*> GetAllActionsVectors();
-  virtual std::vector<std::pair<gd::Expression*, gd::ParameterMetadata> >
-      GetAllExpressionsWithMetadata();
+  virtual std::vector<gd::Expression*> GetAllExpressions();

  virtual void SerializeTo(SerializerElement& element) const;
  virtual void UnserializeFrom(gd::Project& project,
@@ -69,6 +64,8 @@ class GD_CORE_API ForEachEvent : public gd::BaseEvent {
  gd::InstructionsList conditions;
  gd::InstructionsList actions;
  gd::EventsList events;
+
+  bool objectsToPickSelected;
 };

 }  // namespace gd
--- a/Core/GDCore/Events/Builtin/GroupEvent.cpp
+++ b/Core/GDCore/Events/Builtin/GroupEvent.cpp
@@ -19,21 +19,6 @@ namespace gd {
 GroupEvent::GroupEvent()
    : BaseEvent(), creationTime(0), colorR(74), colorG(176), colorB(228) {}

-vector<gd::String> GroupEvent::GetAllSearchableStrings() const {
-  vector<gd::String> allSearchableStrings;
-
-  allSearchableStrings.push_back(name);
-
-  return allSearchableStrings;
-}
-
-bool GroupEvent::ReplaceAllSearchableStrings(
-    std::vector<gd::String> newSearchableString) {
-  if (newSearchableString[0] == name) return false;
-  SetName(newSearchableString[0]);
-  return true;
-}
-
 void GroupEvent::SerializeTo(SerializerElement& element) const {
  element.SetAttribute("name", name);
  element.SetAttribute("source", source);
@@ -76,4 +61,5 @@ void GroupEvent::SetBackgroundColor(unsigned int colorR_,
  colorB = colorB_;
 }

+
 }  // namespace gd
--- a/Core/GDCore/Events/Builtin/GroupEvent.h
+++ b/Core/GDCore/Events/Builtin/GroupEvent.h
@@ -13,7 +13,6 @@
 namespace gd {
 class Instruction;
 class Project;
-class EventVisitor;
 }
 class EventsCodeGenerationContext;

@@ -107,10 +106,6 @@ class GD_CORE_API GroupEvent : public gd::BaseEvent {
  virtual const gd::EventsList& GetSubEvents() const { return events; };
  virtual gd::EventsList& GetSubEvents() { return events; };

-  virtual std::vector<gd::String> GetAllSearchableStrings() const;
-  virtual bool ReplaceAllSearchableStrings(
-      std::vector<gd::String> newSearchableString);
-
  virtual void SerializeTo(SerializerElement& element) const;
  virtual void UnserializeFrom(gd::Project& project,
                               const SerializerElement& element);
--- a/Core/GDCore/Events/Builtin/LinkEvent.cpp
+++ b/Core/GDCore/Events/Builtin/LinkEvent.cpp
@@ -16,7 +16,6 @@
 #include "GDCore/Project/Object.h"
 #include "GDCore/Project/Project.h"
 #include "GDCore/Serialization/SerializerElement.h"
-#include "GDCore/Events/EventVisitor.h"

 using namespace std;

@@ -131,46 +130,30 @@ void LinkEvent::SerializeTo(SerializerElement& element) const {

 void LinkEvent::UnserializeFrom(gd::Project& project,
                                const SerializerElement& element) {
+  SerializerElement& includeElement = element.GetChild("include", 0, "Limites");
+
  SetTarget(element.GetChild("target", 0, "Scene").GetValue().GetString());

-  // Compatibility with GD <= 5
-  if (element.HasChild("include", "Limites")) {
-    SerializerElement& includeElement = element.GetChild("include", 0, "Limites");
-    if (includeElement.HasAttribute("includeAll")) {
-      // Compatibility with GDevelop <= 4.0.92
-      if (includeElement.GetBoolAttribute("includeAll", true)) {
-        SetIncludeAllEvents();
-      } else {
-        SetIncludeStartAndEnd(includeElement.GetIntAttribute("start"),
-                              includeElement.GetIntAttribute("end"));
-      }
+  if (includeElement.HasAttribute("includeAll")) {
+    // Compatibility with GDevelop <= 4.0.92
+    if (includeElement.GetBoolAttribute("includeAll", true)) {
+      SetIncludeAllEvents();
    } else {
-      // GDevelop > 4.0.92
-      IncludeConfig config = static_cast<IncludeConfig>(
-          includeElement.GetIntAttribute("includeConfig", 0));
-      if (config == INCLUDE_ALL)
-        SetIncludeAllEvents();
-      else if (config == INCLUDE_EVENTS_GROUP)
-        SetIncludeEventsGroup(includeElement.GetStringAttribute("eventsGroup"));
-      else if (config == INCLUDE_BY_INDEX)
-        SetIncludeStartAndEnd(includeElement.GetIntAttribute("start"),
-                              includeElement.GetIntAttribute("end"));
+      SetIncludeStartAndEnd(includeElement.GetIntAttribute("start"),
+                            includeElement.GetIntAttribute("end"));
    }
  } else {
-    // Since GDevelop 5, links always include all events.
-    SetIncludeAllEvents();
+    // GDevelop > 4.0.92
+    IncludeConfig config = static_cast<IncludeConfig>(
+        includeElement.GetIntAttribute("includeConfig", 0));
+    if (config == INCLUDE_ALL)
+      SetIncludeAllEvents();
+    else if (config == INCLUDE_EVENTS_GROUP)
+      SetIncludeEventsGroup(includeElement.GetStringAttribute("eventsGroup"));
+    else if (config == INCLUDE_BY_INDEX)
+      SetIncludeStartAndEnd(includeElement.GetIntAttribute("start"),
+                            includeElement.GetIntAttribute("end"));
  }
-  // end of compatibility code
-}
-
-bool LinkEvent::AcceptVisitor(gd::EventVisitor &eventVisitor) {
-  return BaseEvent::AcceptVisitor(eventVisitor) |
-         eventVisitor.VisitLinkEvent(*this);
-}
-
-void LinkEvent::AcceptVisitor(gd::ReadOnlyEventVisitor &eventVisitor) const {
-  BaseEvent::AcceptVisitor(eventVisitor);
-  eventVisitor.VisitLinkEvent(*this);
 }

 }  // namespace gd
--- a/Core/GDCore/Events/Builtin/LinkEvent.h
+++ b/Core/GDCore/Events/Builtin/LinkEvent.h
@@ -30,7 +30,7 @@ class GD_CORE_API LinkEvent : public gd::BaseEvent {
        includeEnd(gd::String::npos),
        linkWasInvalid(false){};
  virtual ~LinkEvent();
-  virtual gd::LinkEvent* Clone() const override { return new LinkEvent(*this); }
+  virtual gd::LinkEvent* Clone() const { return new LinkEvent(*this); }

  /**
   * Get the link target (i.e. the scene or external events the link refers to).
@@ -86,7 +86,7 @@ class GD_CORE_API LinkEvent : public gd::BaseEvent {
  /**
   * The link event must always be preprocessed.
   */
-  virtual bool MustBePreprocessed() override { return true; }
+  virtual bool MustBePreprocessed() { return true; }

  /**
   * \brief Get a pointer to the list of events that are targeted by the link.
@@ -107,14 +107,11 @@ class GD_CORE_API LinkEvent : public gd::BaseEvent {
                                 EventsList& eventList,
                                 std::size_t indexOfTheEventInThisList);

-  virtual bool IsExecutable() const override { return true; };
+  virtual bool IsExecutable() const { return true; };

-  virtual void SerializeTo(SerializerElement& element) const override;
+  virtual void SerializeTo(SerializerElement& element) const;
  virtual void UnserializeFrom(gd::Project& project,
-                               const SerializerElement& element) override;
-
-  bool AcceptVisitor(gd::EventVisitor& eventVisitor) override;
-  void AcceptVisitor(gd::ReadOnlyEventVisitor& eventVisitor) const override;
+                               const SerializerElement& element);

 private:
  gd::String
--- a/Core/GDCore/Events/Builtin/RepeatEvent.cpp
+++ b/Core/GDCore/Events/Builtin/RepeatEvent.cpp
@@ -5,6 +5,9 @@
 */

 #include "RepeatEvent.h"
+#include "GDCore/Events/CodeGeneration/EventsCodeGenerationContext.h"
+#include "GDCore/Events/CodeGeneration/EventsCodeGenerator.h"
+#include "GDCore/Events/CodeGeneration/ExpressionsCodeGeneration.h"
 #include "GDCore/Events/Serialization.h"
 #include "GDCore/Serialization/SerializerElement.h"

@@ -31,15 +34,11 @@ vector<gd::InstructionsList*> RepeatEvent::GetAllActionsVectors() {
  return allActions;
 }

-vector<pair<gd::Expression*, gd::ParameterMetadata> >
-    RepeatEvent::GetAllExpressionsWithMetadata() {
-  vector<pair<gd::Expression*, gd::ParameterMetadata> >
-      allExpressionsWithMetadata;
-  auto metadata = gd::ParameterMetadata().SetType("number");
-  allExpressionsWithMetadata.push_back(
-      std::make_pair(&repeatNumberExpression, metadata));
+vector<gd::Expression*> RepeatEvent::GetAllExpressions() {
+  vector<gd::Expression*> allExpressions;
+  allExpressions.push_back(&repeatNumberExpression);

-  return allExpressionsWithMetadata;
+  return allExpressions;
 }

 vector<const gd::InstructionsList*> RepeatEvent::GetAllConditionsVectors()
@@ -57,15 +56,11 @@ vector<const gd::InstructionsList*> RepeatEvent::GetAllActionsVectors() const {
  return allActions;
 }

-vector<pair<const gd::Expression*, const gd::ParameterMetadata> >
-    RepeatEvent::GetAllExpressionsWithMetadata() const {
-  vector<pair<const gd::Expression*, const gd::ParameterMetadata> >
-      allExpressionsWithMetadata;
-  auto metadata = gd::ParameterMetadata().SetType("number");
-  allExpressionsWithMetadata.push_back(
-      std::make_pair(&repeatNumberExpression, metadata));
+vector<const gd::Expression*> RepeatEvent::GetAllExpressions() const {
+  vector<const gd::Expression*> allExpressions;
+  allExpressions.push_back(&repeatNumberExpression);

-  return allExpressionsWithMetadata;
+  return allExpressions;
 }

 void RepeatEvent::SerializeTo(SerializerElement& element) const {
@@ -75,10 +70,8 @@ void RepeatEvent::SerializeTo(SerializerElement& element) const {
      conditions, element.AddChild("conditions"));
  gd::EventsListSerialization::SerializeInstructionsTo(
      actions, element.AddChild("actions"));
-
-  if (!events.IsEmpty())
-    gd::EventsListSerialization::SerializeEventsTo(events,
-                                                  element.AddChild("events"));
+  gd::EventsListSerialization::SerializeEventsTo(events,
+                                                 element.AddChild("events"));
 }

 void RepeatEvent::UnserializeFrom(gd::Project& project,
@@ -91,12 +84,8 @@ void RepeatEvent::UnserializeFrom(gd::Project& project,
      project, conditions, element.GetChild("conditions", 0, "Conditions"));
  gd::EventsListSerialization::UnserializeInstructionsFrom(
      project, actions, element.GetChild("actions", 0, "Actions"));
-
-  events.Clear();
-  if (element.HasChild("events", "Events")) {
-    gd::EventsListSerialization::UnserializeEventsFrom(
-        project, events, element.GetChild("events", 0, "Events"));
-  }
+  gd::EventsListSerialization::UnserializeEventsFrom(
+      project, events, element.GetChild("events", 0, "Events"));
 }

 }  // namespace gd
--- a/Core/GDCore/Events/Builtin/RepeatEvent.h
+++ b/Core/GDCore/Events/Builtin/RepeatEvent.h
@@ -45,14 +45,11 @@ class GD_CORE_API RepeatEvent : public gd::BaseEvent {

  virtual std::vector<gd::InstructionsList*> GetAllConditionsVectors();
  virtual std::vector<gd::InstructionsList*> GetAllActionsVectors();
-  virtual std::vector<std::pair<gd::Expression*, gd::ParameterMetadata> >
-      GetAllExpressionsWithMetadata();
-
+  virtual std::vector<gd::Expression*> GetAllExpressions();
  virtual std::vector<const gd::InstructionsList*> GetAllConditionsVectors()
      const;
  virtual std::vector<const gd::InstructionsList*> GetAllActionsVectors() const;
-  virtual std::vector<std::pair<const gd::Expression*, const gd::ParameterMetadata> >
-      GetAllExpressionsWithMetadata() const;
+  virtual std::vector<const gd::Expression*> GetAllExpressions() const;

  virtual void SerializeTo(SerializerElement& element) const;
  virtual void UnserializeFrom(gd::Project& project,
--- a/Core/GDCore/Events/Builtin/StandardEvent.cpp
+++ b/Core/GDCore/Events/Builtin/StandardEvent.cpp
@@ -53,10 +53,8 @@ void StandardEvent::SerializeTo(SerializerElement& element) const {
      conditions, element.AddChild("conditions"));
  gd::EventsListSerialization::SerializeInstructionsTo(
      actions, element.AddChild("actions"));
-
-  if (!events.IsEmpty())
-    gd::EventsListSerialization::SerializeEventsTo(events,
-                                                  element.AddChild("events"));
+  gd::EventsListSerialization::SerializeEventsTo(events,
+                                                 element.AddChild("events"));
 }

 void StandardEvent::UnserializeFrom(gd::Project& project,
@@ -65,12 +63,8 @@ void StandardEvent::UnserializeFrom(gd::Project& project,
      project, conditions, element.GetChild("conditions", 0, "Conditions"));
  gd::EventsListSerialization::UnserializeInstructionsFrom(
      project, actions, element.GetChild("actions", 0, "Actions"));
-
-  events.Clear();
-  if (element.HasChild("events", "Events")) {
-    gd::EventsListSerialization::UnserializeEventsFrom(
-        project, events, element.GetChild("events", 0, "Events"));
-  }
+  gd::EventsListSerialization::UnserializeEventsFrom(
+      project, events, element.GetChild("events", 0, "Events"));
 }

 }  // namespace gd
--- a/Core/GDCore/Events/Builtin/WhileEvent.cpp
+++ b/Core/GDCore/Events/Builtin/WhileEvent.cpp
@@ -6,6 +6,9 @@

 #if defined(GD_IDE_ONLY)
 #include "WhileEvent.h"
+#include "GDCore/Events/CodeGeneration/EventsCodeGenerationContext.h"
+#include "GDCore/Events/CodeGeneration/EventsCodeGenerator.h"
+#include "GDCore/Events/CodeGeneration/ExpressionsCodeGeneration.h"
 #include "GDCore/Events/Serialization.h"
 #include "GDCore/Serialization/SerializerElement.h"

@@ -52,10 +55,8 @@ void WhileEvent::SerializeTo(SerializerElement& element) const {
      conditions, element.AddChild("conditions"));
  gd::EventsListSerialization::SerializeInstructionsTo(
      actions, element.AddChild("actions"));
-
-  if (!events.IsEmpty())
-    gd::EventsListSerialization::SerializeEventsTo(events,
-                                                  element.AddChild("events"));
+  gd::EventsListSerialization::SerializeEventsTo(events,
+                                                 element.AddChild("events"));
 }

 void WhileEvent::UnserializeFrom(gd::Project& project,
@@ -70,12 +71,8 @@ void WhileEvent::UnserializeFrom(gd::Project& project,
      project, conditions, element.GetChild("conditions", 0, "Conditions"));
  gd::EventsListSerialization::UnserializeInstructionsFrom(
      project, actions, element.GetChild("actions", 0, "Actions"));
-
-  events.Clear();
-  if (element.HasChild("events", "Events")) {
-    gd::EventsListSerialization::UnserializeEventsFrom(
-        project, events, element.GetChild("events", 0, "Events"));
-  }
+  gd::EventsListSerialization::UnserializeEventsFrom(
+      project, events, element.GetChild("events", 0, "Events"));
 }

 }  // namespace gd
--- a/Core/GDCore/Events/CodeGeneration/EffectsCodeGenerator.cpp
+++ b/Core/GDCore/Events/CodeGeneration/EffectsCodeGenerator.cpp
@@ -3,75 +3,56 @@
 * Copyright 2008-present Florian Rival (Florian.Rival@gmail.com). All rights
 * reserved. This project is released under the MIT License.
 */
-#include "EffectsCodeGenerator.h"
-
 #include <iostream>
-
+#include "EffectsCodeGenerator.h"
 #include "GDCore/Extensions/Metadata/EffectMetadata.h"
 #include "GDCore/Extensions/Metadata/MetadataProvider.h"
 #include "GDCore/Project/Effect.h"
-#include "GDCore/Project/EffectsContainer.h"
 #include "GDCore/Project/Layer.h"
 #include "GDCore/Project/Layout.h"
-#include "GDCore/Project/Object.h"
 #include "GDCore/Project/Project.h"
-#include "GDCore/IDE/ProjectBrowserHelper.h"

 namespace gd {

-void EffectsCodeGenerator::DoVisitObject(gd::Object &object) {
-  auto &effects = object.GetEffects();
-  for (std::size_t e = 0; e < effects.GetEffectsCount(); e++) {
-    auto &effect = effects.GetEffect(e);
-    AddEffectIncludeFiles(effect);
-  }
-};
-
-void EffectsCodeGenerator::AddEffectIncludeFiles(const gd::Effect &effect) {
-  // TODO: this browse all the extensions every time we're trying to find
-  // a new effect. Might be a good idea to rework MetadataProvider to be
-  // faster (not sure if it is a bottleneck at all though - but could be
-  // for events code generation).
-  const gd::EffectMetadata &effectMetadata =
-      MetadataProvider::GetEffectMetadata(platform, effect.GetEffectType());
-
-  for (auto &includeFile : effectMetadata.GetIncludeFiles())
-    includeFiles.insert(includeFile);
-};
-
-void EffectsCodeGenerator::GenerateEffectsIncludeFiles(
-    const gd::Platform &platform,
-    gd::Project &project,
-    std::set<gd::String> &includeFiles) {
-  // TODO Add unit tests on this function.
-  
-  // TODO Merge with UsedExtensionsFinder.
-  // Default lights rely on the fact that UsedExtensionsFinder doesn't find
-  // extension usages for effects. This has the happy side effect of not
-  // including Three.js when no 3D object are in the scenes.
-  // We need to make something explicit to avoid future bugs.
-
+void ExposeProjectEffects(
+    const gd::Project& project,
+    const std::function<void(const gd::Effect& effect)>& worker) {
  // See also gd::Project::ExposeResources for a method that traverse the whole
  // project (this time for resources) and
  // WholeProjectRefactorer::ExposeProjectEvents.

-  EffectsCodeGenerator effectsCodeGenerator(platform, includeFiles);
-
  // Add layouts effects
  for (std::size_t s = 0; s < project.GetLayoutsCount(); s++) {
    auto& layout = project.GetLayout(s);

    for (std::size_t l = 0; l < layout.GetLayersCount(); ++l) {
-      auto& effects = layout.GetLayer(l).GetEffects();
-      for (std::size_t e = 0; e < effects.GetEffectsCount(); ++e) {
-        auto& effect = effects.GetEffect(e);
-        effectsCodeGenerator.AddEffectIncludeFiles(effect);
+      auto& layer = layout.GetLayer(l);
+
+      for (std::size_t e = 0; e < layer.GetEffectsCount(); ++e) {
+        auto& effect = layer.GetEffect(e);
+        worker(effect);
      }
    }
  }
+}

-  // Add objects effects
-  gd::ProjectBrowserHelper::ExposeProjectObjects(project, effectsCodeGenerator);
+void EffectsCodeGenerator::GenerateEffectsIncludeFiles(
+    const gd::Platform& platform,
+    const gd::Project& project,
+    std::set<gd::String>& includeFiles) {
+  ExposeProjectEffects(
+      project, [&platform, &includeFiles](const gd::Effect& effect) {
+        // TODO: this browse all the extensions every time we're trying to find
+        // a new effect. Might be a good idea to rework MetadataProvider to be
+        // faster (not sure if it is a bottleneck at all though - but could be
+        // for events code generation).
+        const gd::EffectMetadata& effectMetadata =
+            MetadataProvider::GetEffectMetadata(platform,
+                                                effect.GetEffectType());
+
+        for (auto& includeFile : effectMetadata.GetIncludeFiles())
+          includeFiles.insert(includeFile);
+      });
 }

 }  // namespace gd
--- a/Core/GDCore/Events/CodeGeneration/EffectsCodeGenerator.h
+++ b/Core/GDCore/Events/CodeGeneration/EffectsCodeGenerator.h
@@ -3,18 +3,16 @@
 * Copyright 2008-present Florian Rival (Florian.Rival@gmail.com). All rights
 * reserved. This project is released under the MIT License.
 */
-#pragma once
+#ifndef GDCORE_EffectsCodeGenerator_H
+#define GDCORE_EffectsCodeGenerator_H

 #include <set>
 #include <utility>
 #include <vector>
 #include "GDCore/String.h"
-#include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
-
 namespace gd {
 class Project;
 class Platform;
-class Effect;
 }  // namespace gd

 namespace gd {
@@ -22,26 +20,16 @@ namespace gd {
 /**
 * \brief Internal class used to generate code from events
 */
-class GD_CORE_API EffectsCodeGenerator : public ArbitraryObjectsWorker {
-public:
+class GD_CORE_API EffectsCodeGenerator {
+ public:
  /**
   * \brief Add all the include files required by the project effects.
   */
  static void GenerateEffectsIncludeFiles(const gd::Platform& platform,
-                                          gd::Project& project,
+                                          const gd::Project& project,
                                          std::set<gd::String>& includeFiles);
-
-private:
-  EffectsCodeGenerator(const gd::Platform &platform_,
-                       std::set<gd::String> &includeFiles_)
-      : platform(platform_), includeFiles(includeFiles_){};
-
-  void AddEffectIncludeFiles(const gd::Effect& effect);
-
-  void DoVisitObject(gd::Object &object) override;
-
-  const gd::Platform &platform;
-  std::set<gd::String> &includeFiles;
 };

 }  // namespace gd
+
+#endif  // GDCORE_EffectsCodeGenerator_H
--- a/Core/GDCore/Events/CodeGeneration/EventsCodeGenerationContext.cpp
+++ b/Core/GDCore/Events/CodeGeneration/EventsCodeGenerationContext.cpp
@@ -4,9 +4,7 @@
 * reserved. This project is released under the MIT License.
 */
 #include "GDCore/Events/CodeGeneration/EventsCodeGenerationContext.h"
-
 #include <set>
-
 #include "GDCore/CommonTools.h"
 #include "GDCore/Events/CodeGeneration/EventsCodeGenerator.h"
 #include "GDCore/Events/Tools/EventsCodeNameMangler.h"
@@ -16,7 +14,7 @@ using namespace std;
 namespace gd {

 void EventsCodeGenerationContext::InheritsFrom(
-    EventsCodeGenerationContext& parent_) {
+    const EventsCodeGenerationContext& parent_) {
  parent = &parent_;

  // Objects lists declared by parent became "already declared" in the child
@@ -26,8 +24,8 @@ void EventsCodeGenerationContext::InheritsFrom(
            parent_.objectsListsToBeDeclared.end(),
            std::inserter(alreadyDeclaredObjectsLists,
                          alreadyDeclaredObjectsLists.begin()));
-  std::copy(parent_.objectsListsOrEmptyToBeDeclared.begin(),
-            parent_.objectsListsOrEmptyToBeDeclared.end(),
+  std::copy(parent_.objectsListsWithoutPickingToBeDeclared.begin(),
+            parent_.objectsListsWithoutPickingToBeDeclared.end(),
            std::inserter(alreadyDeclaredObjectsLists,
                          alreadyDeclaredObjectsLists.begin()));
  std::copy(parent_.emptyObjectsListsToBeDeclared.begin(),
@@ -35,8 +33,6 @@ void EventsCodeGenerationContext::InheritsFrom(
            std::inserter(alreadyDeclaredObjectsLists,
                          alreadyDeclaredObjectsLists.begin()));

-  nearestAsyncParent = parent_.IsAsyncCallback() ? &parent_ : parent_.nearestAsyncParent;
-  asyncDepth = parent_.asyncDepth;
  depthOfLastUse = parent_.depthOfLastUse;
  customConditionDepth = parent_.customConditionDepth;
  contextDepth = parent_.GetContextDepth() + 1;
@@ -46,59 +42,33 @@ void EventsCodeGenerationContext::InheritsFrom(
  }
 }

-void EventsCodeGenerationContext::InheritsAsAsyncCallbackFrom(
-    EventsCodeGenerationContext& parent_) {
-  // Increasing the async depth is enough to mark the context as an async callback.
-  InheritsFrom(parent_);
-  asyncDepth = parent_.asyncDepth + 1;
-}
-
 void EventsCodeGenerationContext::Reuse(
-    EventsCodeGenerationContext& parent_) {
+    const EventsCodeGenerationContext& parent_) {
  InheritsFrom(parent_);
  if (parent_.CanReuse())
    contextDepth = parent_.GetContextDepth();  // Keep same context depth
 }

-void EventsCodeGenerationContext::NotifyAsyncParentsAboutDeclaredObject(const gd::String& objectName) {
-  gd::EventsCodeGenerationContext* asyncContext = IsAsyncCallback() ? this : nearestAsyncParent;
-  for (;
-        asyncContext != nullptr;
-        asyncContext = asyncContext->parent->nearestAsyncParent)
-    asyncContext->allObjectsListToBeDeclaredAcrossChildren.insert(objectName);
-}
-
 void EventsCodeGenerationContext::ObjectsListNeeded(
    const gd::String& objectName) {
-  if (!IsToBeDeclared(objectName)) {
+  if (!IsToBeDeclared(objectName))
    objectsListsToBeDeclared.insert(objectName);

-    if (IsInsideAsync()) {
-      NotifyAsyncParentsAboutDeclaredObject(objectName);
-    }
-  }
-
  depthOfLastUse[objectName] = GetContextDepth();
 }

-void EventsCodeGenerationContext::ObjectsListNeededOrEmptyIfJustDeclared(
+void EventsCodeGenerationContext::ObjectsListWithoutPickingNeeded(
    const gd::String& objectName) {
-  if (!IsToBeDeclared(objectName)) {
-    objectsListsOrEmptyToBeDeclared.insert(objectName);
-
-    if (IsInsideAsync()) {
-      NotifyAsyncParentsAboutDeclaredObject(objectName);
-    }
-  }
+  if (!IsToBeDeclared(objectName))
+    objectsListsWithoutPickingToBeDeclared.insert(objectName);

  depthOfLastUse[objectName] = GetContextDepth();
 }

 void EventsCodeGenerationContext::EmptyObjectsListNeeded(
    const gd::String& objectName) {
-  if (!IsToBeDeclared(objectName)) {
+  if (!IsToBeDeclared(objectName))
    emptyObjectsListsToBeDeclared.insert(objectName);
-  }

  depthOfLastUse[objectName] = GetContextDepth();
 }
@@ -107,8 +77,8 @@ std::set<gd::String> EventsCodeGenerationContext::GetAllObjectsToBeDeclared()
    const {
  std::set<gd::String> allObjectListsToBeDeclared(
      objectsListsToBeDeclared.begin(), objectsListsToBeDeclared.end());
-  allObjectListsToBeDeclared.insert(objectsListsOrEmptyToBeDeclared.begin(),
-                                    objectsListsOrEmptyToBeDeclared.end());
+  allObjectListsToBeDeclared.insert(objectsListsWithoutPickingToBeDeclared.begin(),
+                                    objectsListsWithoutPickingToBeDeclared.end());
  allObjectListsToBeDeclared.insert(emptyObjectsListsToBeDeclared.begin(),
                                    emptyObjectsListsToBeDeclared.end());

@@ -132,21 +102,4 @@ bool EventsCodeGenerationContext::IsSameObjectsList(
         otherContext.GetLastDepthObjectListWasNeeded(objectName);
 }

-bool EventsCodeGenerationContext::ShouldUseAsyncObjectsList(
-    const gd::String& objectName) const {
-  if (!IsInsideAsync()) return false;
-
-  // Check if the objects list was used after (or in) the nearest async callback context.
-  const gd::EventsCodeGenerationContext* asyncContext = IsAsyncCallback() ? this : nearestAsyncParent;
-  if (parent->GetLastDepthObjectListWasNeeded(objectName) >= asyncContext->GetContextDepth()) {
-    // The object was used in a context after (or in) the nearest async parent context, so we're not getting it from the
-    // async object lists (it was already gotten from there in this previous context).
-    return false;
-  }
-
-  // If the objects list is declared in a parent of the nearest async context, it means
-  // the async context had to use an async objects list to access it.
-  return asyncContext->ObjectAlreadyDeclaredByParents(objectName);
-};
-
 }  // namespace gd
--- a/Core/GDCore/Events/CodeGeneration/EventsCodeGenerationContext.h
+++ b/Core/GDCore/Events/CodeGeneration/EventsCodeGenerationContext.h
@@ -8,7 +8,6 @@
 #include <map>
 #include <memory>
 #include <set>
-
 #include "GDCore/String.h"

 namespace gd {
@@ -34,7 +33,11 @@ class GD_CORE_API EventsCodeGenerationContext {
   * updated to contain the maximal scope depth reached.
   */
  EventsCodeGenerationContext(unsigned int* maxDepthLevel_ = nullptr)
-      : maxDepthLevel(maxDepthLevel_){};
+      : contextDepth(0),
+        customConditionDepth(0),
+        maxDepthLevel(maxDepthLevel_),
+        parent(NULL),
+        reuseExplicitlyForbidden(false){};
  virtual ~EventsCodeGenerationContext(){};

  /**
@@ -42,13 +45,7 @@ class GD_CORE_API EventsCodeGenerationContext {
   * another one. The child will then for example not declare again objects
   * already declared by its parent.
   */
-  void InheritsFrom(EventsCodeGenerationContext& parent);
-
-  /**
-   * Call this method to make an EventsCodeGenerationContext as a "child" of
-   * another one, but in the context of an async function.
-   */
-  void InheritsAsAsyncCallbackFrom(EventsCodeGenerationContext& parent);
+  void InheritsFrom(const EventsCodeGenerationContext& parent);

  /**
   * \brief As InheritsFrom, mark the context as being the child of another one,
@@ -56,7 +53,7 @@ class GD_CORE_API EventsCodeGenerationContext {
   *
   * Used for example for optimizing the last event of a list.
   */
-  void Reuse(EventsCodeGenerationContext& parent);
+  void Reuse(const EventsCodeGenerationContext& parent);

  /**
   * \brief Forbid any optimization that would reuse and modify the object list
@@ -91,19 +88,19 @@ class GD_CORE_API EventsCodeGenerationContext {
  const EventsCodeGenerationContext* GetParentContext() const { return parent; }

  /**
-   * Mark the object as being the object being handled by the instruction.
+   * Mark the object has being the object being handled by the instruction
   */
  void SetCurrentObject(const gd::String& objectName) {
    currentObject = objectName;
  };

  /**
-   * Set that no particular object is being handled by an instruction.
+   * Set that no particular object is being handled by an instruction
   */
  void SetNoCurrentObject() { currentObject = ""; };

  /**
-   * Get the object being handled by the instruction.
+   * Get the object being handled by the instruction
   */
  const gd::String& GetCurrentObject() const { return currentObject; };

@@ -112,7 +109,7 @@ class GD_CORE_API EventsCodeGenerationContext {
   *
   * The list will be filled with objects from the scene if it is the first time
   * it is requested, unless there is already an object list with this name
-   * (i.e. `ObjectAlreadyDeclaredByParents(objectName)` returns true).
+   * (i.e. `ObjectAlreadyDeclared(objectName)` returns true).
   */
  void ObjectsListNeeded(const gd::String& objectName);

@@ -124,7 +121,7 @@ class GD_CORE_API EventsCodeGenerationContext {
   * from the scene. If there is already an objects list with this name, no new
   * list will be declared again.
   */
-  void ObjectsListNeededOrEmptyIfJustDeclared(const gd::String& objectName);
+  void ObjectsListWithoutPickingNeeded(const gd::String& objectName);

  /**
   * Call this when an instruction in the event needs an empty object list,
@@ -137,21 +134,29 @@ class GD_CORE_API EventsCodeGenerationContext {
  void EmptyObjectsListNeeded(const gd::String& objectName);

  /**
-   * Return true if an object list has already been declared by the parent contexts.
+   * Return true if an object list has already been declared (or is going to be
+   * declared).
   */
-  bool ObjectAlreadyDeclaredByParents(const gd::String& objectName) const {
+  bool ObjectAlreadyDeclared(const gd::String& objectName) const {
    return (alreadyDeclaredObjectsLists.find(objectName) !=
            alreadyDeclaredObjectsLists.end());
  };

+  /**
+   * \brief Consider that \a objectName is now declared in the context.
+   */
+  void SetObjectDeclared(const gd::String& objectName) {
+    alreadyDeclaredObjectsLists.insert(objectName);
+  }
+
  /**
   * Return all the objects lists which will be declared by the current context
-   * (normal, potentially empty or empty).
+   * ( the non empty as well as the empty objects lists )
   */
  std::set<gd::String> GetAllObjectsToBeDeclared() const;

  /**
-   * Return the objects lists which will be declared by the current context.
+   * Return the objects lists which will be declared by the current context
   */
  const std::set<gd::String>& GetObjectsListsToBeDeclared() const {
    return objectsListsToBeDeclared;
@@ -161,9 +166,9 @@ class GD_CORE_API EventsCodeGenerationContext {
   * Return the objects lists which will be will be declared, without filling
   * them with objects from the scene.
   */
-  const std::set<gd::String>& GetObjectsListsToBeEmptyIfJustDeclared()
+  const std::set<gd::String>& GetObjectsListsToBeDeclaredWithoutPicking()
      const {
-    return objectsListsOrEmptyToBeDeclared;
+    return objectsListsWithoutPickingToBeDeclared;
  };

  /**
@@ -179,7 +184,7 @@ class GD_CORE_API EventsCodeGenerationContext {
   * Return the objects lists which are already declared and can be used in the
   * current context without declaration.
   */
-  const std::set<gd::String>& GetObjectsListsAlreadyDeclaredByParents() const {
+  const std::set<gd::String>& GetObjectsListsAlreadyDeclared() const {
    return alreadyDeclaredObjectsLists;
  };

@@ -222,55 +227,22 @@ class GD_CORE_API EventsCodeGenerationContext {
   */
  size_t GetCurrentConditionDepth() const { return customConditionDepth; }

-  /**
-   * \brief Returns the list of all objects declared in this context
-   * and subcontexts.
-   * \warning Only works on an async callback's context.
-   *
-   * It is to be used by the Async event code generator to know what objects
-   * lists to backup for the async callback and async callbacks after it.
-   */
-  const std::set<gd::String>& GetAllDeclaredObjectsAcrossChildren() {
-    return allObjectsListToBeDeclaredAcrossChildren;
-  };
-
-  /**
-   * Returns true if an object list should be gotten from a backed up
-   * objects list instead of the parent context. This can happen inside an
-   * asynchronous callback or a child context of an asynchronous callback (i.e:
-   * the `asyncDepth` is not 0).
-   */
-  bool ShouldUseAsyncObjectsList(const gd::String& objectName) const;
-
-  /**
-   * Returns true if the code currently being generated is inside an
-   * asynchronous context (either in an asynchronous callback, or in a children of
-   * an asynchronous callback).
-   */
-  bool IsInsideAsync() const { return asyncDepth != 0; };
-
-  /**
-   * Returns true if the code currently being generated is an asynchronous
-   * callback (but not a child of an asynchronous callback).
-   */
-  bool IsAsyncCallback() const { return parent != nullptr && parent->asyncDepth != asyncDepth; }
-
+ private:
  /**
   * \brief Returns true if the given object is already going to be declared
-   * in this context (either as a traditional objects list, or an empty one).
+   * (either as a traditional objects list, or one without picking, or one
+   * empty).
+   *
   */
  bool IsToBeDeclared(const gd::String& objectName) {
    return objectsListsToBeDeclared.find(objectName) !=
               objectsListsToBeDeclared.end() ||
-           objectsListsOrEmptyToBeDeclared.find(objectName) !=
-               objectsListsOrEmptyToBeDeclared.end() ||
+           objectsListsWithoutPickingToBeDeclared.find(objectName) !=
+               objectsListsWithoutPickingToBeDeclared.end() ||
           emptyObjectsListsToBeDeclared.find(objectName) !=
               emptyObjectsListsToBeDeclared.end();
  };

- private:
-  void NotifyAsyncParentsAboutDeclaredObject(const gd::String& objectName);
-
  std::set<gd::String>
      alreadyDeclaredObjectsLists;  ///< Objects lists already needed in a
                                    ///< parent context.
@@ -278,7 +250,7 @@ class GD_CORE_API EventsCodeGenerationContext {
      objectsListsToBeDeclared;  ///< Objects lists that will be declared in
                                 ///< this context.
  std::set<gd::String>
-      objectsListsOrEmptyToBeDeclared;  ///< Objects lists that will be
+      objectsListsWithoutPickingToBeDeclared;  ///< Objects lists that will be
                                               ///< declared in this context,
                                               ///< but not filled with scene's
                                               ///< objects.
@@ -288,40 +260,21 @@ class GD_CORE_API EventsCodeGenerationContext {
                                      ///< but not filled with scene's
                                      ///< objects and not filled with any
                                      ///< previously existing objects list.
-  std::set<gd::String>
-      allObjectsListToBeDeclaredAcrossChildren;  ///< This is only to be used by
-                                                 ///< the async callback
-                                                 ///< contexts to know all
-                                                 ///< objects declared across
-                                                 ///< all children, so that the
-                                                 ///< necessary objects can be
-                                                 ///< backed up.
-
  std::map<gd::String, unsigned int>
      depthOfLastUse;  ///< The context depth when an object was last used.
  gd::String
      currentObject;  ///< The object being used by an action or condition.
-  unsigned int contextDepth = 0;  ///< The depth of the context: 0 for a newly
-                                  ///< created context, n+1 for any context
-                                  ///< inheriting from context with depth n.
-  unsigned int customConditionDepth =
-      0;  ///< The depth of the conditions being generated.
-  unsigned int asyncDepth =
-      0;  ///< If higher than 0, the current context is an asynchronous callback,
-          ///< or a child context of an asynchronous callback:
-          ///< - If the parent's async depth != the current context async depth,
-          ///<   then the current context is an asynchronous callback context.
-          ///< - Otherwise, it's a child of an asynchronous callback.
+  unsigned int contextDepth;  ///< The depth of the context : 0 for a newly
+                              ///< created context, n+1 for any context
+                              ///< inheriting from context with depth n.
+  unsigned int
+      customConditionDepth;  ///< The depth of the conditions being generated.
  unsigned int* maxDepthLevel;  ///< A pointer to a unsigned int updated with
                                ///< the maximum depth reached.
-  const EventsCodeGenerationContext* parent =
-      nullptr;  ///< The parent of the current context. Can be NULL.
-  EventsCodeGenerationContext* nearestAsyncParent =
-      nullptr;  ///< The nearest parent context that is an async callback
-                ///< context.
-  bool reuseExplicitlyForbidden =
-      false;  ///< If set to true, forbid children contexts
-              ///< to reuse this one without inheriting.
+  const EventsCodeGenerationContext*
+      parent;  ///< The parent of the current context. Can be NULL.
+  bool reuseExplicitlyForbidden;  ///< If set to true, forbid children context
+                                  ///< to reuse this one without inheriting.
 };

 }  // namespace gd
--- a/Core/GDCore/Events/CodeGeneration/EventsCodeGenerator.cpp
+++ b/Core/GDCore/Events/CodeGeneration/EventsCodeGenerator.cpp
--- a/Core/GDCore/Events/CodeGeneration/EventsCodeGenerator.h
+++ b/Core/GDCore/Events/CodeGeneration/EventsCodeGenerator.h
@@ -9,18 +9,15 @@
 #include <set>
 #include <utility>
 #include <vector>
-
 #include "GDCore/Events/Event.h"
 #include "GDCore/Events/Instruction.h"
 #include "GDCore/String.h"
-#include "GDCore/Project/ProjectScopedContainers.h"
 namespace gd {
 class EventsList;
 class Expression;
 class Project;
 class Layout;
 class ObjectsContainer;
-class ObjectsContainersList;
 class ExternalEvents;
 class ParameterMetadata;
 class ObjectMetadata;
@@ -38,6 +35,10 @@ namespace gd {
 * \brief Internal class used to generate code from events
 */
 class GD_CORE_API EventsCodeGenerator {
+  // Compatiblity with old ExpressionParser
+  friend class CallbacksForGeneratingExpressionCode;
+  friend class VariableCodeGenerationCallbacks;
+  // end of compatibility code
  friend class ExpressionCodeGenerator;

 public:
@@ -50,7 +51,7 @@ class GD_CORE_API EventsCodeGenerator {
   * \brief Construct a code generator for the specified
   * platform/project/layout.
   */
-  EventsCodeGenerator(const gd::Project& project_,
+  EventsCodeGenerator(gd::Project& project_,
                      const gd::Layout& layout,
                      const gd::Platform& platform_);

@@ -59,7 +60,8 @@ class GD_CORE_API EventsCodeGenerator {
   * objects/groups and platform
   */
  EventsCodeGenerator(const gd::Platform& platform,
-                      const gd::ProjectScopedContainers& projectScopedContainers_);
+                      gd::ObjectsContainer& globalObjectsAndGroups_,
+                      const gd::ObjectsContainer& objectsAndGroups_);
  virtual ~EventsCodeGenerator(){};

  /**
@@ -78,7 +80,7 @@ class GD_CORE_API EventsCodeGenerator {
   * \return Code
   */
  virtual gd::String GenerateEventsListCode(
-      gd::EventsList& events, EventsCodeGenerationContext& context);
+      gd::EventsList& events, const EventsCodeGenerationContext& context);

  /**
   * \brief Generate code for executing a condition list
@@ -125,7 +127,7 @@ class GD_CORE_API EventsCodeGenerator {
   *
   */
  std::vector<gd::String> GenerateParametersCodes(
-      const std::vector<gd::Expression>& parameters,
+      const std::vector<gd::Expression> & parameters,
      const std::vector<gd::ParameterMetadata>& parametersInfo,
      EventsCodeGenerationContext& context,
      std::vector<std::pair<gd::String, gd::String> >*
@@ -155,54 +157,8 @@ class GD_CORE_API EventsCodeGenerator {
   * \param context Context used for generation
   * \return Code
   */
-  gd::String GenerateActionCode(
-      gd::Instruction& action,
-      EventsCodeGenerationContext& context,
-      const gd::String& optionalAsyncCallbackName = "");
-
-  struct CallbackDescriptor {
-    CallbackDescriptor(const gd::String functionName_,
-                       const gd::String argumentsList_,
-                       const std::set<gd::String> requiredObjects_)
-        : functionName(functionName_),
-          argumentsList(argumentsList_),
-          requiredObjects(requiredObjects_){};
-    /**
-     * The name by which the function can be invoked.
-     */
-    const gd::String functionName;
-    /**
-     * The comma separated list of arguments that the function takes.
-     */
-    const gd::String argumentsList;
-    /**
-     * A set of all objects that need to be backed up to be passed to the
-     * callback code.
-     */
-    const std::set<gd::String> requiredObjects;
-  };
-
-  /**
-   * \brief Generates actions and events as a callback.
-   *
-   * This is used by asynchronous functions to run the code out of the normal
-   * events flow.
-   *
-   * \returns A set with all objects required by the callback code.
-   * The caller must take care of backing them up in a LongLivedObjectsList,
-   * and to pass it to the callback function as the last argument.
-   */
-  virtual const CallbackDescriptor GenerateCallback(
-      const gd::String& callbackFunctionName,
-      gd::EventsCodeGenerationContext& parentContext,
-      gd::InstructionsList& actions,
-      gd::EventsList* subEvents = nullptr);
-
-  /**
-   * \brief Generates the parameters list of an event's generated function.
-   */
-  const gd::String GenerateEventsParameters(
-      const gd::EventsCodeGenerationContext& context);
+  gd::String GenerateActionCode(gd::Instruction& action,
+                                EventsCodeGenerationContext& context);

  /**
   * \brief Generate code for declaring objects lists.
@@ -327,12 +283,18 @@ class GD_CORE_API EventsCodeGenerator {
   */
  bool ErrorOccurred() const { return errorOccurred; };

-  const gd::ObjectsContainersList& GetObjectsContainersList() const {
-    return projectScopedContainers.GetObjectsContainersList();
-  };
+  /**
+   * \brief Get the global objects/groups used for code generation.
+   */
+  gd::ObjectsContainer& GetGlobalObjectsAndGroups() const {
+    return globalObjectsAndGroups;
+  }

-  const gd::ProjectScopedContainers& GetProjectScopedContainers() const {
-    return projectScopedContainers;
+  /**
+   * \brief Get the objects/groups used for code generation.
+   */
+  const gd::ObjectsContainer& GetObjectsAndGroups() const {
+    return objectsAndGroups;
  }

  /**
@@ -345,7 +307,7 @@ class GD_CORE_API EventsCodeGenerator {
   * \brief Get the project the code is being generated for.
   * \warning This is only valid if HasProjectAndLayout() is true.
   */
-  const gd::Project& GetProject() const { return *project; }
+  gd::Project& GetProject() const { return *project; }

  /**
   * \brief Get the layout the code is being generated for.
@@ -358,6 +320,22 @@ class GD_CORE_API EventsCodeGenerator {
   */
  const gd::Platform& GetPlatform() const { return platform; }

+  /**
+   * \brief Convert a group name to the full list of objects contained in the
+   * group.
+   *
+   * Get a list containing the "real" objects name when the events refers to \a
+   * objectName :<br> If \a objectName if really an object, the list will only
+   * contains \a objectName unchanged.<br> If \a objectName is a group, the list
+   * will contains all the objects of the group.<br> If \a objectName is the
+   * "current" object in the context ( i.e: The object being used for launching
+   * an action... ), none of the two rules below apply, and the list will only
+   * contains the context "current" object name.
+   */
+  std::vector<gd::String> ExpandObjectsName(
+      const gd::String& objectName,
+      const EventsCodeGenerationContext& context) const;
+
  /**
   * \brief Get the maximum depth of custom conditions reached during code
   * generation.
@@ -383,18 +361,6 @@ class GD_CORE_API EventsCodeGenerator {
    return boolName;
  }

-  /**
-   * \brief Generate the full name for accessing to a boolean variable used for
-   * conditions.
-   *
-   * Default implementation just returns the boolean name passed as argument.
-   */
-  virtual gd::String GenerateUpperScopeBooleanFullName(
-      const gd::String& boolName,
-      const gd::EventsCodeGenerationContext& context) {
-    return boolName;
-  }
-
  /**
   * \brief Must create a boolean. Its value must be false.
   *
@@ -449,32 +415,6 @@ class GD_CORE_API EventsCodeGenerator {

  enum VariableScope { LAYOUT_VARIABLE = 0, PROJECT_VARIABLE, OBJECT_VARIABLE };

-  /**
-   * Generate a single unique number for the specified instruction.
-   *
-   * This is useful for instructions that need to identify themselves in the
-   * generated code like the "Trigger Once" conditions. The id is stable across
-   * code generations if the instructions are the same objects in memory.
-   *
-   * Note that if this function is called multiple times with the same
-   * instruction, the unique number returned will be *different*. This is
-   * because a single instruction might appear at multiple places in events due
-   * to the usage of links.
-   */
-  size_t GenerateSingleUsageUniqueIdFor(const gd::Instruction* instruction);
-
-  /**
-   * Generate a single unique number for an events list.
-   *
-   * This is useful to create unique function names for events list, that are
-   * stable across code generation given the exact same list of events. They are
-   * *not* stable if events are moved/reorganized.
-   */
-  size_t GenerateSingleUsageUniqueIdForEventsList();
-
-  virtual const gd::String GenerateRelationalOperatorCodes(
-      const gd::String& operatorString);
-
 protected:
  /**
   * \brief Generate the code for a single parameter.
@@ -484,9 +424,9 @@ class GD_CORE_API EventsCodeGenerator {
   * - object : Object name -> string
   * - expression : Mathematical expression -> number (double)
   * - string : %Text expression -> string
-   * - layer, color, file, stringWithSelector : Same as string
+   * - layer, color, file, joyaxis : Same as string
   * - relationalOperator : Used to make a comparison between the function
-  return value and value of the parameter preceding the relationOperator
+  resturn value and value of the parameter preceding the relationOperator
  parameter -> string
   * - operator : Used to update a value using a setter and a getter -> string
   * - key, mouse, objectvar, scenevar, globalvar, password, musicfile,
@@ -502,18 +442,28 @@ class GD_CORE_API EventsCodeGenerator {
   * Other standard parameters type that should be implemented by platforms:
   * - currentScene: Reference to the current runtime scene.
   * - objectList : a map containing lists of objects which are specified by the
-  object name in another parameter.
-   * - objectListOrEmptyIfJustDeclared : Same as `objectList` but do not pick
-  object if they are not already picked.
-   * - objectPtr: Return a reference to the object specified by the object name
-  in another parameter. Example:
+  object name in another parameter. (C++: std::map <gd::String,
+  std::vector<RuntimeObject*> *>). Example:
+   * \code
+      AddExpression("Count", _("Object count"), _("Count the number of picked
+  objects"), _("Objects"), "res/conditions/nbObjet.png")
+      .AddParameter("objectList", _("Object"))
+      .SetFunctionName("PickedObjectsCount").SetIncludeFile("GDCpp/Extensions/Builtin/ObjectTools.h");
+
+   * \endcode
+   * - objectListWithoutPicking : Same as objectList but do not pick object if
+  they are not already picked.
+   * - objectPtr : Return a pointer to object specified by the object name in
+  another parameter ( C++: RuntimeObject* ). Example:
   * \code
  .AddParameter("object", _("Object"))
  .AddParameter("objectPtr", _("Target object"))
+  //The called function will be called with this signature on the C++ platform:
+  Function(gd::String, RuntimeObject*)
   * \endcode
   */
  virtual gd::String GenerateParameterCodes(
-      const gd::Expression& parameter,
+      const gd::String& parameter,
      const gd::ParameterMetadata& metadata,
      gd::EventsCodeGenerationContext& context,
      const gd::String& lastObjectName,
@@ -545,10 +495,6 @@ class GD_CORE_API EventsCodeGenerator {
    return ".getChild(" + ConvertToStringExplicit(childName) + ")";
  };

-  virtual gd::String GenerateVariableValueAs(const gd::String& type) {
-    return type == "string" ? ".getAsString()" : ".getAsNumber()";
-  }
-
  /**
   * \brief Generate the code to get the child of a variable,
   * using generated the expression.
@@ -577,15 +523,6 @@ class GD_CORE_API EventsCodeGenerator {
    return "fakeObjectListOf_" + objectName;
  }

-  virtual gd::String GeneratePropertyGetter(const gd::PropertiesContainer& propertiesContainer,
-                                            const gd::NamedPropertyDescriptor& property,
-                                            const gd::String& type,
-                                            gd::EventsCodeGenerationContext& context);
-
-  virtual gd::String GenerateParameterGetter(const gd::ParameterMetadata& parameter,
-                                             const gd::String& type,
-                                             gd::EventsCodeGenerationContext& context);
-
  /**
   * \brief Generate the code to reference an object which is
   * in an empty/null state.
@@ -660,15 +597,28 @@ class GD_CORE_API EventsCodeGenerator {
  };

  /**
-   * \brief Must negate a predicate.
+   * \brief Must negate a predicat.
   *
-   * The default implementation generates C-style code : It wraps the predicate
+   * The default implementation generates C-style code : It wraps the predicat
   * inside parenthesis and add a !.
   */
-  virtual gd::String GenerateNegatedPredicate(const gd::String& predicate) const {
-    return "!(" + predicate + ")";
+  virtual gd::String GenerateNegatedPredicat(const gd::String& predicat) const {
+    return "!(" + predicat + ")";
  };

+  /**
+   * \brief Must create a boolean which is a reference to a boolean declared in
+   * the parent scope.
+   *
+   * The default implementation generates C-style code.
+   */
+  virtual gd::String GenerateReferenceToUpperScopeBoolean(
+      const gd::String& referenceName,
+      const gd::String& referencedBoolean,
+      gd::EventsCodeGenerationContext& context) {
+    return "bool & " + referenceName + " = " + referencedBoolean + ";\n";
+  }
+
  virtual gd::String GenerateFreeCondition(
      const std::vector<gd::String>& arguments,
      const gd::InstructionMetadata& instrInfos,
@@ -696,30 +646,24 @@ class GD_CORE_API EventsCodeGenerator {
      gd::EventsCodeGenerationContext& context);

  virtual gd::String GenerateFreeAction(
-      const gd::String& functionCallName,
      const std::vector<gd::String>& arguments,
      const gd::InstructionMetadata& instrInfos,
-      gd::EventsCodeGenerationContext& context,
-      const gd::String& optionalAsyncCallbackName = "");
+      gd::EventsCodeGenerationContext& context);

  virtual gd::String GenerateObjectAction(
      const gd::String& objectName,
      const gd::ObjectMetadata& objInfo,
-      const gd::String& functionCallName,
      const std::vector<gd::String>& arguments,
      const gd::InstructionMetadata& instrInfos,
-      gd::EventsCodeGenerationContext& context,
-      const gd::String& optionalAsyncCallbackName = "");
+      gd::EventsCodeGenerationContext& context);

  virtual gd::String GenerateBehaviorAction(
      const gd::String& objectName,
      const gd::String& behaviorName,
      const gd::BehaviorMetadata& autoInfo,
-      const gd::String& functionCallName,
      const std::vector<gd::String>& arguments,
      const gd::InstructionMetadata& instrInfos,
-      gd::EventsCodeGenerationContext& context,
-      const gd::String& optionalAsyncCallbackName = "");
+      gd::EventsCodeGenerationContext& context);

  gd::String GenerateRelationalOperatorCall(
      const gd::InstructionMetadata& instrInfos,
@@ -764,19 +708,19 @@ class GD_CORE_API EventsCodeGenerator {
  /**
   * Generate the getter to get the name of the specified behavior.
   */
-  virtual gd::String GenerateGetBehaviorNameCode(
-      const gd::String& behaviorName);
+  virtual gd::String GenerateGetBehaviorNameCode(const gd::String& behaviorName);

  const gd::Platform& platform;  ///< The platform being used.

-  gd::ProjectScopedContainers projectScopedContainers;
+  gd::ObjectsContainer& globalObjectsAndGroups;
+  const gd::ObjectsContainer& objectsAndGroups;

  bool hasProjectAndLayout;  ///< true only if project and layout are valid
                             ///< references. If false, they should not be used.
-  const gd::Project* project;  ///< The project being used.
-  const gd::Layout* scene;     ///< The scene being generated.
+  gd::Project* project;      ///< The project being used.
+  const gd::Layout* scene;   ///< The scene being generated.

-  bool errorOccurred;          ///< Must be set to true if an error occurred.
+  bool errorOccurred;          ///< Must be set to true if an error occured.
  bool compilationForRuntime;  ///< Is set to true if the code generation is
                               ///< made for runtime only.

@@ -792,11 +736,6 @@ class GD_CORE_API EventsCodeGenerator {
  size_t maxCustomConditionsDepth;  ///< The maximum depth value for all the
                                    ///< custom conditions created.
  size_t maxConditionsListsSize;  ///< The maximum size of a list of conditions.
-
-  std::set<size_t>
-      instructionUniqueIds;  ///< The unique ids generated for instructions.
-  size_t eventsListNextUniqueId;  ///< The next identifier to use for an events
-                                  ///< list function name.
 };

 }  // namespace gd
--- a/Core/GDCore/Events/CodeGeneration/ExpressionCodeGenerator.cpp
+++ b/Core/GDCore/Events/CodeGeneration/ExpressionCodeGenerator.cpp
@@ -4,11 +4,8 @@
 * reserved. This project is released under the MIT License.
 */
 #include "ExpressionCodeGenerator.h"
-
 #include <memory>
 #include <vector>
-#include <vector>
-
 #include "GDCore/CommonTools.h"
 #include "GDCore/Events/CodeGeneration/EventsCodeGenerationContext.h"
 #include "GDCore/Events/CodeGeneration/EventsCodeGenerator.h"
@@ -26,40 +23,132 @@
 #include "GDCore/IDE/Events/ExpressionValidator.h"
 #include "GDCore/Project/Layout.h"
 #include "GDCore/Project/Project.h"
-#include "GDCore/Project/VariablesContainersList.h"
-#include "GDCore/Project/ObjectsContainersList.h"
-#include "GDCore/Project/ProjectScopedContainers.h"
-#include "GDCore/IDE/Events/ExpressionTypeFinder.h"
-#include "GDCore/IDE/Events/ExpressionVariableOwnerFinder.h"
+
+// Compatibility with old ExpressionParser
+#include "GDCore/Events/CodeGeneration/ExpressionsCodeGeneration.h"
+#include "GDCore/Events/CodeGeneration/VariableParserCallbacks.h"
+#include "GDCore/Events/Parsers/ExpressionParser.h"
+#include "GDCore/Events/Parsers/VariableParser.h"
+// end of compatibility code

 namespace gd {

+bool ExpressionCodeGenerator::useOldExpressionParser = false;
+
 gd::String ExpressionCodeGenerator::GenerateExpressionCode(
    EventsCodeGenerator& codeGenerator,
    EventsCodeGenerationContext& context,
-    const gd::String& rootType,
-    const gd::Expression& expression,
-    const gd::String& rootObjectName) {
-  ExpressionCodeGenerator generator(rootType, rootObjectName, codeGenerator, context);
+    const gd::String& type,
+    const gd::String& expression,
+    const gd::String& objectName) {
+  // Compatibility with old ExpressionParser
+  if (useOldExpressionParser) {
+    if (type == "number") {
+      gd::String code = "";
+      gd::CallbacksForGeneratingExpressionCode callbacks(
+          code, codeGenerator, context);
+      gd::ExpressionParser parser(expression);
+      if (!parser.ParseMathExpression(codeGenerator.GetPlatform(),
+                                      codeGenerator.GetGlobalObjectsAndGroups(),
+                                      codeGenerator.GetObjectsAndGroups(),
+                                      callbacks) ||
+          code.empty()) {
+        std::cout << "Error (old ExpressionParser): \""
+                  << parser.GetFirstError() << "\" in: \"" << expression
+                  << "\" (number)" << std::endl;
+        code = "0";
+      }

-  auto node = expression.GetRootNode();
-  if (!node) {
-    std::cout << "Error: error while parsing: \"" << expression.GetPlainString()
-              << "\" (" << rootType << ")" << std::endl;
+      return code;
+    } else if (type == "string") {
+      gd::String code = "";
+      gd::CallbacksForGeneratingExpressionCode callbacks(
+          code, codeGenerator, context);
+      gd::ExpressionParser parser(expression);
+      if (!parser.ParseStringExpression(
+              codeGenerator.GetPlatform(),
+              codeGenerator.GetGlobalObjectsAndGroups(),
+              codeGenerator.GetObjectsAndGroups(),
+              callbacks) ||
+          code.empty()) {
+        std::cout << "Error (old ExpressionParser): \""
+                  << parser.GetFirstError() << "\" in: \"" << expression
+                  << "\" (string)" << std::endl;
+        code = "\"\"";
+      }

-    return generator.GenerateDefaultValue(rootType);
+      return code;
+    } else if (type == "scenevar") {
+      gd::String code = "";
+      gd::VariableCodeGenerationCallbacks callbacks(
+          code,
+          codeGenerator,
+          context,
+          gd::EventsCodeGenerator::LAYOUT_VARIABLE);
+
+      gd::VariableParser parser(expression);
+      if (!parser.Parse(callbacks)) {
+        std::cout << "Error (old VariableParser) :" << parser.GetFirstError()
+                  << " in: " << expression << std::endl;
+        code = codeGenerator.GenerateBadVariable();
+      }
+      return code;
+    } else if (type == "globalvar") {
+      gd::String code = "";
+      gd::VariableCodeGenerationCallbacks callbacks(
+          code,
+          codeGenerator,
+          context,
+          gd::EventsCodeGenerator::PROJECT_VARIABLE);
+
+      gd::VariableParser parser(expression);
+      if (!parser.Parse(callbacks)) {
+        std::cout << "Error (old VariableParser) :" << parser.GetFirstError()
+                  << " in: " << expression << std::endl;
+        code = codeGenerator.GenerateBadVariable();
+      }
+      return code;
+    } else if (type == "objectvar") {
+      gd::String code = "";
+
+      // Object is either the object of the previous parameter or, if it is
+      // empty, the object being picked by the instruction.
+      gd::String object =
+          objectName.empty() ? context.GetCurrentObject() : objectName;
+
+      gd::VariableCodeGenerationCallbacks callbacks(
+          code, codeGenerator, context, object);
+
+      gd::VariableParser parser(expression);
+      if (!parser.Parse(callbacks)) {
+        std::cout << "Error (old VariableParser) :" << parser.GetFirstError()
+                  << " in: " << expression << std::endl;
+        code = codeGenerator.GenerateBadVariable();
+      }
+      return code;
+    }
+
+    std::cout << "Type error (old ExpressionParser): type \"" << type
+              << "\" is not supported" << std::endl;
+    return "/* Error during code generation: type " + type +
+           " is not supported for old ExpressionParser. */ 0";
  }
+  // end of compatibility code

-  gd::ExpressionValidator validator(codeGenerator.GetPlatform(),
-                                    codeGenerator.GetProjectScopedContainers(),
-                                    rootType);
+  gd::ExpressionParser2 parser(codeGenerator.GetPlatform(),
+                               codeGenerator.GetGlobalObjectsAndGroups(),
+                               codeGenerator.GetObjectsAndGroups());
+  auto node = parser.ParseExpression(type, expression, objectName);
+  gd::ExpressionValidator validator;
  node->Visit(validator);
-  if (!validator.GetFatalErrors().empty()) {
-    std::cout << "Error: \"" << validator.GetFatalErrors()[0]->GetMessage()
-              << "\" in: \"" << expression.GetPlainString() << "\" ("
-              << rootType << ")" << std::endl;

-    return generator.GenerateDefaultValue(rootType);
+  ExpressionCodeGenerator generator(codeGenerator, context);
+  if (!validator.GetErrors().empty()) {
+    std::cout << "Error: \"" << validator.GetErrors()[0]->GetMessage()
+              << "\" in: \"" << expression << "\" (" << type << ")"
+              << std::endl;
+
+    return generator.GenerateDefaultValue(type);
  }

  node->Visit(generator);
@@ -102,96 +191,27 @@ void ExpressionCodeGenerator::OnVisitTextNode(TextNode& node) {
 void ExpressionCodeGenerator::OnVisitVariableNode(VariableNode& node) {
  // This "translation" from the type to an enum could be avoided
  // if all types were moved to an enum.
-  auto type = gd::ExpressionTypeFinder::GetType(codeGenerator.GetPlatform(),
-                                            codeGenerator.GetObjectsContainersList(),
-                                            rootType,
-                                            node);
+  EventsCodeGenerator::VariableScope scope =
+      node.type == "globalvar"
+          ? gd::EventsCodeGenerator::PROJECT_VARIABLE
+          : ((node.type == "scenevar")
+                 ? gd::EventsCodeGenerator::LAYOUT_VARIABLE
+                 : gd::EventsCodeGenerator::OBJECT_VARIABLE);

-  if (gd::ParameterMetadata::IsExpression("variable", type)) {
-    // The node is a variable inside an expression waiting for a *variable* to be returned, not its value.
-    EventsCodeGenerator::VariableScope scope =
-        type == "globalvar"
-            ? gd::EventsCodeGenerator::PROJECT_VARIABLE
-            : ((type == "scenevar")
-                  ? gd::EventsCodeGenerator::LAYOUT_VARIABLE
-                  : gd::EventsCodeGenerator::OBJECT_VARIABLE);
-
-    auto objectName = gd::ExpressionVariableOwnerFinder::GetObjectName(codeGenerator.GetPlatform(),
-                                          codeGenerator.GetObjectsContainersList(),
-                                          rootObjectName,
-                                          node);
-    output += codeGenerator.GenerateGetVariable(
-        node.name, scope, context, objectName);
-    if (node.child) node.child->Visit(*this);
-  } else {
-    // The node represents a variable or an object variable in an expression waiting for its *value* to be returned.
-
-    codeGenerator.GetProjectScopedContainers().MatchIdentifierWithName<void>(node.name, [&](){
-      // Generate the code to access the object variables.
-
-      // Defer generation of the access to the object and variable to the child,
-      // once we know the name of the variable.
-      objectNameToUseForVariableAccessor = node.name;
-      if (node.child) node.child->Visit(*this);
-      objectNameToUseForVariableAccessor = "";
-
-      output += codeGenerator.GenerateVariableValueAs(type);
-    }, [&]() {
-      if (!codeGenerator.HasProjectAndLayout()) {
-        gd::LogWarning("Tried to generate access to a variable without a project/scene - the code generator only works for global and scene variables for now.");
-        output += GenerateDefaultValue(type);
-        return;
-      }
-
-      // This could be adapted in the future if more scopes are supported.
-      EventsCodeGenerator::VariableScope scope = gd::EventsCodeGenerator::PROJECT_VARIABLE;
-      if (codeGenerator.GetProjectScopedContainers().GetVariablesContainersList().GetBottomMostVariablesContainer()->Has(node.name)) {
-        scope = gd::EventsCodeGenerator::LAYOUT_VARIABLE;
-      }
-
-      output += codeGenerator.GenerateGetVariable(node.name, scope, context, "");
-      if (node.child) node.child->Visit(*this);
-      output += codeGenerator.GenerateVariableValueAs(type);
-    }, [&]() {
-      // Properties are not supported.
-      output += GenerateDefaultValue(type);
-    }, [&]() {
-      // Parameters are not supported.
-      output += GenerateDefaultValue(type);
-    }, [&]() {
-      // The identifier does not represents a variable (or a child variable), or not at least an existing
-      // one, nor an object variable. It's invalid.
-      output += GenerateDefaultValue(type);
-    });
-  }
+  output += codeGenerator.GenerateGetVariable(
+      node.name, scope, context, node.objectName);
+  if (node.child) node.child->Visit(*this);
 }

 void ExpressionCodeGenerator::OnVisitVariableAccessorNode(
    VariableAccessorNode& node) {
-    if (!objectNameToUseForVariableAccessor.empty()) {
-      // Use the name of the object passed by the parent, as we need both to access an object variable.
-      output += codeGenerator.GenerateGetVariable(node.name,
-          gd::EventsCodeGenerator::OBJECT_VARIABLE, context, objectNameToUseForVariableAccessor);
-
-      // We have accessed an object variable, from now we can continue accessing the child variables
-      // (including using the bracket notation).
-      objectNameToUseForVariableAccessor = "";
-    } else {
-        output += codeGenerator.GenerateVariableAccessor(node.name);
-    }
+  output += codeGenerator.GenerateVariableAccessor(node.name);
  if (node.child) node.child->Visit(*this);
 }

 void ExpressionCodeGenerator::OnVisitVariableBracketAccessorNode(
    VariableBracketAccessorNode& node) {
-  if (!objectNameToUseForVariableAccessor.empty()) {
-    // Bracket notation can't be used to directly access a variable of an object (`MyObject["MyVariable"]`).
-    // This would be rejected by the ExpressionValidator.
-    output += codeGenerator.GenerateBadVariable();
-    return;
-  }
-
-  ExpressionCodeGenerator generator("string", "", codeGenerator, context);
+  ExpressionCodeGenerator generator(codeGenerator, context);
  node.expression->Visit(generator);
  output +=
      codeGenerator.GenerateVariableBracketAccessor(generator.GetOutput());
@@ -199,108 +219,39 @@ void ExpressionCodeGenerator::OnVisitVariableBracketAccessorNode(
 }

 void ExpressionCodeGenerator::OnVisitIdentifierNode(IdentifierNode& node) {
-  auto type = gd::ExpressionTypeFinder::GetType(codeGenerator.GetPlatform(),
-                                            codeGenerator.GetObjectsContainersList(),
-                                            rootType,
-                                            node);
-
-  if (gd::ParameterMetadata::IsObject(type)) {
+  if (gd::ParameterMetadata::IsObject(node.type)) {
    output +=
-        codeGenerator.GenerateObject(node.identifierName, type, context);
-  } else if (gd::ParameterMetadata::IsExpression("variable", type)) {
-      EventsCodeGenerator::VariableScope scope =
-          type == "globalvar"
-              ? gd::EventsCodeGenerator::PROJECT_VARIABLE
-              : ((type == "scenevar")
-                    ? gd::EventsCodeGenerator::LAYOUT_VARIABLE
-                    : gd::EventsCodeGenerator::OBJECT_VARIABLE);
-
-      auto objectName = gd::ExpressionVariableOwnerFinder::GetObjectName(codeGenerator.GetPlatform(),
-                                            codeGenerator.GetObjectsContainersList(),
-                                            rootObjectName,
-                                            node);
-      output += codeGenerator.GenerateGetVariable(
-          node.identifierName, scope, context, objectName);
-      if (!node.childIdentifierName.empty()) {
-        output += codeGenerator.GenerateVariableAccessor(node.childIdentifierName);
-      }
+        codeGenerator.GenerateObject(node.identifierName, node.type, context);
  } else {
-    const auto& variablesContainersList = codeGenerator.GetProjectScopedContainers().GetVariablesContainersList();
-    const auto& propertiesContainersList = codeGenerator.GetProjectScopedContainers().GetPropertiesContainersList();
-    const auto& parametersVectorsList = codeGenerator.GetProjectScopedContainers().GetParametersVectorsList();
-
-    // The node represents a variable, property, parameter or an object.
-    codeGenerator.GetProjectScopedContainers().MatchIdentifierWithName<void>(node.identifierName, [&]() {
-      // Generate the code to access the object variable.
-      output += codeGenerator.GenerateGetVariable(
-        node.childIdentifierName, gd::EventsCodeGenerator::OBJECT_VARIABLE, context, node.identifierName);
-      output += codeGenerator.GenerateVariableValueAs(type);
-    }, [&]() {
-      if (!codeGenerator.HasProjectAndLayout()) {
-        gd::LogWarning("Tried to generate access to a variable without a project/scene - the code generator only works for global and scene variables for now.");
-        output += GenerateDefaultValue(type);
-        return;
-      }
-
-      // This could be adapted in the future if more scopes are supported at runtime.
-      EventsCodeGenerator::VariableScope scope = gd::EventsCodeGenerator::PROJECT_VARIABLE;
-      if (variablesContainersList.GetBottomMostVariablesContainer()->Has(node.identifierName)) {
-        scope = gd::EventsCodeGenerator::LAYOUT_VARIABLE;
-      }
-
-      output += codeGenerator.GenerateGetVariable(node.identifierName, scope, context, "");
-      if (!node.childIdentifierName.empty()) {
-        output += codeGenerator.GenerateVariableAccessor(node.childIdentifierName);
-      }
-      output += codeGenerator.GenerateVariableValueAs(type);
-    }, [&]() {
-      const auto& propertiesContainerAndProperty = propertiesContainersList.Get(node.identifierName);
-
-      output += codeGenerator.GeneratePropertyGetter(
-        propertiesContainerAndProperty.first, propertiesContainerAndProperty.second, type, context);
-    }, [&]() {
-      const auto& parameter = gd::ParameterMetadataTools::Get(parametersVectorsList, node.identifierName);
-      output += codeGenerator.GenerateParameterGetter(parameter, type, context);
-    }, [&]() {
-      // The identifier does not represents a variable (or a child variable), or not at least an existing
-      // one, nor an object variable. It's invalid.
-      output += GenerateDefaultValue(type);
-    });
+    output += "/* Error during generation, unrecognized identifier type: " +
+              codeGenerator.ConvertToString(node.type) + " with value " +
+              codeGenerator.ConvertToString(node.identifierName) + " */ " +
+              codeGenerator.ConvertToStringExplicit(node.identifierName);
  }
 }

-void ExpressionCodeGenerator::OnVisitFunctionCallNode(FunctionCallNode& node) {
-  auto type = gd::ExpressionTypeFinder::GetType(codeGenerator.GetPlatform(),
-                                            codeGenerator.GetObjectsContainersList(),
-                                            rootType,
-                                            node);
-
-  const gd::ExpressionMetadata &metadata = MetadataProvider::GetFunctionCallMetadata(
-      codeGenerator.GetPlatform(),
-      codeGenerator.GetObjectsContainersList(),
-      node);
-
-  if (gd::MetadataProvider::IsBadExpressionMetadata(metadata)) {
+void ExpressionCodeGenerator::OnVisitFunctionNode(FunctionNode& node) {
+  if (gd::MetadataProvider::IsBadExpressionMetadata(node.expressionMetadata)) {
    output += "/* Error during generation, function not found: " +
-              codeGenerator.ConvertToString(node.functionName) + " */ " +
-              GenerateDefaultValue(type);
+              codeGenerator.ConvertToString(node.functionName) + " for type " +
+              node.type + " */ " + GenerateDefaultValue(node.type);
    return;
  }

  if (!node.objectName.empty()) {
    if (!node.behaviorName.empty()) {
-      output += GenerateBehaviorFunctionCode(type,
+      output += GenerateBehaviorFunctionCode(node.type,
                                             node.objectName,
                                             node.behaviorName,
                                             node.parameters,
-                                             metadata);
+                                             node.expressionMetadata);
    } else {
      output += GenerateObjectFunctionCode(
-          type, node.objectName, node.parameters, metadata);
+          node.type, node.objectName, node.parameters, node.expressionMetadata);
    }
  } else {
    output +=
-        GenerateFreeFunctionCode(node.parameters, metadata);
+        GenerateFreeFunctionCode(node.parameters, node.expressionMetadata);
  }
 }

@@ -308,10 +259,10 @@ gd::String ExpressionCodeGenerator::GenerateFreeFunctionCode(
    const std::vector<std::unique_ptr<ExpressionNode>>& parameters,
    const ExpressionMetadata& expressionMetadata) {
  codeGenerator.AddIncludeFiles(
-      expressionMetadata.GetIncludeFiles());
+      expressionMetadata.codeExtraInformation.GetIncludeFiles());

  // Launch custom code generator if needed
-  if (expressionMetadata.HasCustomCodeGenerator()) {
+  if (expressionMetadata.codeExtraInformation.HasCustomCodeGenerator()) {
    return expressionMetadata.codeExtraInformation.customCodeGenerator(
        PrintParameters(parameters), codeGenerator, context);
  }
@@ -328,11 +279,16 @@ gd::String ExpressionCodeGenerator::GenerateObjectFunctionCode(
    const gd::String& objectName,
    const std::vector<std::unique_ptr<ExpressionNode>>& parameters,
    const ExpressionMetadata& expressionMetadata) {
+  const gd::ObjectsContainer& globalObjectsAndGroups =
+      codeGenerator.GetGlobalObjectsAndGroups();
+  const gd::ObjectsContainer& objectsAndGroups =
+      codeGenerator.GetObjectsAndGroups();
+
  codeGenerator.AddIncludeFiles(
-      expressionMetadata.GetIncludeFiles());
+      expressionMetadata.codeExtraInformation.GetIncludeFiles());

  // Launch custom code generator if needed
-  if (expressionMetadata.HasCustomCodeGenerator()) {
+  if (expressionMetadata.codeExtraInformation.HasCustomCodeGenerator()) {
    return expressionMetadata.codeExtraInformation.customCodeGenerator(
        PrintParameters(parameters), codeGenerator, context);
  }
@@ -348,22 +304,23 @@ gd::String ExpressionCodeGenerator::GenerateObjectFunctionCode(

  // Get object(s) concerned by function call
  std::vector<gd::String> realObjects =
-      codeGenerator.GetObjectsContainersList().ExpandObjectName(objectName, context.GetCurrentObject());
+      codeGenerator.ExpandObjectsName(objectName, context);
  for (std::size_t i = 0; i < realObjects.size(); ++i) {
    context.ObjectsListNeeded(realObjects[i]);

-    gd::String objectType = codeGenerator.GetObjectsContainersList().GetTypeOfObject(realObjects[i]);
+    gd::String objectType = gd::GetTypeOfObject(
+        globalObjectsAndGroups, objectsAndGroups, realObjects[i]);
    const ObjectMetadata& objInfo = MetadataProvider::GetObjectMetadata(
        codeGenerator.GetPlatform(), objectType);

-      codeGenerator.AddIncludeFiles(objInfo.includeFiles);
-      functionOutput = codeGenerator.GenerateObjectFunctionCall(
-          realObjects[i],
-          objInfo,
-          expressionMetadata.codeExtraInformation,
-          parametersCode,
-          functionOutput,
-          context);
+    codeGenerator.AddIncludeFiles(objInfo.includeFiles);
+    functionOutput = codeGenerator.GenerateObjectFunctionCall(
+        realObjects[i],
+        objInfo,
+        expressionMetadata.codeExtraInformation,
+        parametersCode,
+        functionOutput,
+        context);
  }

  return functionOutput;
@@ -374,11 +331,16 @@ gd::String ExpressionCodeGenerator::GenerateBehaviorFunctionCode(
    const gd::String& behaviorName,
    const std::vector<std::unique_ptr<ExpressionNode>>& parameters,
    const ExpressionMetadata& expressionMetadata) {
+  const gd::ObjectsContainer& globalObjectsAndGroups =
+      codeGenerator.GetGlobalObjectsAndGroups();
+  const gd::ObjectsContainer& objectsAndGroups =
+      codeGenerator.GetObjectsAndGroups();
+
  codeGenerator.AddIncludeFiles(
-      expressionMetadata.GetIncludeFiles());
+      expressionMetadata.codeExtraInformation.GetIncludeFiles());

  // Launch custom code generator if needed
-  if (expressionMetadata.HasCustomCodeGenerator()) {
+  if (expressionMetadata.codeExtraInformation.HasCustomCodeGenerator()) {
    return expressionMetadata.codeExtraInformation.customCodeGenerator(
        PrintParameters(parameters), codeGenerator, context);
  }
@@ -392,11 +354,12 @@ gd::String ExpressionCodeGenerator::GenerateBehaviorFunctionCode(

  // Get object(s) concerned by function call
  std::vector<gd::String> realObjects =
-      codeGenerator.GetObjectsContainersList().ExpandObjectName(objectName, context.GetCurrentObject());
+      codeGenerator.ExpandObjectsName(objectName, context);

  gd::String functionOutput = GenerateDefaultValue(type);

-  gd::String behaviorType = codeGenerator.GetObjectsContainersList().GetTypeOfBehavior(behaviorName);
+  gd::String behaviorType = gd::GetTypeOfBehavior(
+      globalObjectsAndGroups, objectsAndGroups, behaviorName);
  const BehaviorMetadata& autoInfo = MetadataProvider::GetBehaviorMetadata(
      codeGenerator.GetPlatform(), behaviorType);

@@ -430,20 +393,18 @@ gd::String ExpressionCodeGenerator::GenerateParametersCodes(

    auto& parameterMetadata = expressionMetadata.parameters[i];
    if (!parameterMetadata.IsCodeOnly()) {
+      ExpressionCodeGenerator generator(codeGenerator, context);
      if (nonCodeOnlyParameterIndex < parameters.size()) {
-        auto objectName = gd::ExpressionVariableOwnerFinder::GetObjectName(codeGenerator.GetPlatform(),
-                                              codeGenerator.GetObjectsContainersList(),
-                                              rootObjectName,
-                                              *parameters[nonCodeOnlyParameterIndex].get());
-        ExpressionCodeGenerator generator(parameterMetadata.GetType(), objectName, codeGenerator, context);
        parameters[nonCodeOnlyParameterIndex]->Visit(generator);
        parametersCode += generator.GetOutput();
      } else if (parameterMetadata.IsOptional()) {
-        ExpressionCodeGenerator generator(parameterMetadata.GetType(), "", codeGenerator, context);
        // Optional parameters default value were not parsed at the time of the
        // expression parsing. Parse them now.
-        ExpressionParser2 parser;
-        auto node = parser.ParseExpression(parameterMetadata.GetDefaultValue());
+        ExpressionParser2 parser(codeGenerator.GetPlatform(),
+                                 codeGenerator.GetGlobalObjectsAndGroups(),
+                                 codeGenerator.GetObjectsAndGroups());
+        auto node = parser.ParseExpression(parameterMetadata.GetType(),
+                                           parameterMetadata.GetDefaultValue());

        node->Visit(generator);
        parametersCode += generator.GetOutput();
@@ -493,28 +454,12 @@ gd::String ExpressionCodeGenerator::GenerateDefaultValue(
  if (gd::ParameterMetadata::IsObject(type)) {
    return codeGenerator.GenerateBadObject();
  }
-  if (gd::ParameterMetadata::IsExpression("string", type)) {
-    return "\"\"";
-  }

-  return "0";
+  return (type == "string") ? "\"\"" : "0";
 }

 void ExpressionCodeGenerator::OnVisitEmptyNode(EmptyNode& node) {
-  auto type = gd::ExpressionTypeFinder::GetType(codeGenerator.GetPlatform(),
-                                            codeGenerator.GetObjectsContainersList(),
-                                            rootType,
-                                            node);
-  output += GenerateDefaultValue(type);
-}
-
-void ExpressionCodeGenerator::OnVisitObjectFunctionNameNode(
-    ObjectFunctionNameNode& node) {
-  auto type = gd::ExpressionTypeFinder::GetType(codeGenerator.GetPlatform(),
-                                            codeGenerator.GetObjectsContainersList(),
-                                            rootType,
-                                            node);
-  output += GenerateDefaultValue(type);
+  output += GenerateDefaultValue(node.type);
 }

 }  // namespace gd
--- a/Core/GDCore/Events/CodeGeneration/ExpressionCodeGenerator.h
+++ b/Core/GDCore/Events/CodeGeneration/ExpressionCodeGenerator.h
@@ -9,6 +9,7 @@

 #include <memory>
 #include <vector>
+#include "GDCore/Events/Parsers/ExpressionParser2.h"
 #include "GDCore/Events/Parsers/ExpressionParser2Node.h"
 #include "GDCore/Events/Parsers/ExpressionParser2NodeWorker.h"
 #include "GDCore/String.h"
@@ -34,11 +35,9 @@ namespace gd {
 */
 class GD_CORE_API ExpressionCodeGenerator : public ExpressionParser2NodeWorker {
 public:
-  ExpressionCodeGenerator(const gd::String &rootType_,
-                          const gd::String &rootObjectName_,
-                          EventsCodeGenerator& codeGenerator_,
+  ExpressionCodeGenerator(EventsCodeGenerator& codeGenerator_,
                          EventsCodeGenerationContext& context_)
-      : rootType(rootType_), rootObjectName(rootObjectName_), codeGenerator(codeGenerator_), context(context_){};
+      : codeGenerator(codeGenerator_), context(context_){};
  virtual ~ExpressionCodeGenerator(){};

  /**
@@ -58,9 +57,14 @@ class GD_CORE_API ExpressionCodeGenerator : public ExpressionParser2NodeWorker {
  static gd::String GenerateExpressionCode(EventsCodeGenerator& codeGenerator,
                                           EventsCodeGenerationContext& context,
                                           const gd::String& type,
-                                           const gd::Expression& expression,
+                                           const gd::String& expression,
                                           const gd::String& objectName = "");

+  static void UseOldExpressionParser(bool enable) {
+    useOldExpressionParser = enable;
+  };
+  static bool IsUsingOldExpressionParser() { return useOldExpressionParser; };
+
  const gd::String& GetOutput() { return output; };

 protected:
@@ -74,8 +78,7 @@ class GD_CORE_API ExpressionCodeGenerator : public ExpressionParser2NodeWorker {
  void OnVisitVariableBracketAccessorNode(
      VariableBracketAccessorNode& node) override;
  void OnVisitIdentifierNode(IdentifierNode& node) override;
-  void OnVisitObjectFunctionNameNode(ObjectFunctionNameNode& node) override;
-  void OnVisitFunctionCallNode(FunctionCallNode& node) override;
+  void OnVisitFunctionNode(FunctionNode& node) override;
  void OnVisitEmptyNode(EmptyNode& node) override;

 private:
@@ -102,14 +105,13 @@ class GD_CORE_API ExpressionCodeGenerator : public ExpressionParser2NodeWorker {
      const std::vector<std::unique_ptr<ExpressionNode>>& parameters);

  gd::String output;
-  gd::String objectNameToUseForVariableAccessor;
  EventsCodeGenerator& codeGenerator;
  EventsCodeGenerationContext& context;
-  const gd::String rootType;
-  const gd::String rootObjectName;
+
+  static bool useOldExpressionParser;
 };

 }  // namespace gd

 #endif  // GDCORE_ExpressionCodeGenerator_H
-#endif
+#endif
--- a/Core/GDCore/Events/CodeGeneration/ExpressionsCodeGeneration.cpp
+++ b/Core/GDCore/Events/CodeGeneration/ExpressionsCodeGeneration.cpp
@@ -0,0 +1,229 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "ExpressionsCodeGeneration.h"
+#include "GDCore/CommonTools.h"
+#include "GDCore/Events/CodeGeneration/EventsCodeGenerationContext.h"
+#include "GDCore/Events/CodeGeneration/EventsCodeGenerator.h"
+#include "GDCore/Events/Parsers/ExpressionParser.h"
+#include "GDCore/Events/Tools/EventsCodeNameMangler.h"
+#include "GDCore/Extensions/Metadata/BehaviorMetadata.h"
+#include "GDCore/Extensions/Metadata/ExpressionMetadata.h"
+#include "GDCore/Extensions/Metadata/MetadataProvider.h"
+#include "GDCore/Extensions/Metadata/ObjectMetadata.h"
+#include "GDCore/Extensions/Platform.h"
+#include "GDCore/Extensions/PlatformExtension.h"
+#include "GDCore/Project/Layout.h"
+#include "GDCore/Project/Project.h"
+
+using namespace std;
+
+namespace gd {
+
+CallbacksForGeneratingExpressionCode::CallbacksForGeneratingExpressionCode(
+    gd::String& plainExpression_,
+    EventsCodeGenerator& codeGenerator_,
+    EventsCodeGenerationContext& context_)
+    : plainExpression(plainExpression_),
+      codeGenerator(codeGenerator_),
+      context(context_) {}
+
+void CallbacksForGeneratingExpressionCode::OnConstantToken(gd::String text) {
+  plainExpression += text;
+};
+
+void CallbacksForGeneratingExpressionCode::OnStaticFunction(
+    gd::String functionName,
+    const std::vector<gd::Expression>& parameters,
+    const gd::ExpressionMetadata& expressionInfo) {
+  codeGenerator.AddIncludeFiles(
+      expressionInfo.codeExtraInformation.GetIncludeFiles());
+
+  // Launch custom code generator if needed
+  if (expressionInfo.codeExtraInformation.HasCustomCodeGenerator()) {
+    plainExpression += expressionInfo.codeExtraInformation.customCodeGenerator(
+        parameters, codeGenerator, context);
+    return;
+  }
+
+  // Special case: For strings expressions, function without name is a string.
+  if (GetReturnType() == "string" && functionName.empty()) {
+    if (parameters.empty()) return;
+    plainExpression +=
+        codeGenerator.ConvertToStringExplicit(parameters[0].GetPlainString());
+
+    return;
+  }
+
+  // Prepare parameters
+  std::vector<gd::String> parametersCode =
+      codeGenerator.GenerateParametersCodes(
+          parameters, expressionInfo.parameters, context);
+  gd::String parametersStr;
+  for (std::size_t i = 0; i < parametersCode.size(); ++i) {
+    if (i != 0) parametersStr += ", ";
+    parametersStr += parametersCode[i];
+  }
+
+  plainExpression += expressionInfo.codeExtraInformation.functionCallName +
+                     "(" + parametersStr + ")";
+};
+
+void CallbacksForGeneratingExpressionCode::OnObjectFunction(
+    gd::String functionName,
+    const std::vector<gd::Expression>& parameters,
+    const gd::ExpressionMetadata& expressionInfo) {
+  const gd::ObjectsContainer& globalObjectsAndGroups = codeGenerator.GetGlobalObjectsAndGroups();
+  const gd::ObjectsContainer& objectsAndGroups = codeGenerator.GetObjectsAndGroups();
+
+  codeGenerator.AddIncludeFiles(
+      expressionInfo.codeExtraInformation.GetIncludeFiles());
+  if (parameters.empty()) return;
+
+  // Launch custom code generator if needed
+  if (expressionInfo.codeExtraInformation.HasCustomCodeGenerator()) {
+    plainExpression += expressionInfo.codeExtraInformation.customCodeGenerator(
+        parameters, codeGenerator, context);
+    return;
+  }
+
+  // Prepare parameters
+  std::vector<gd::String> parametersCode =
+      codeGenerator.GenerateParametersCodes(
+          parameters, expressionInfo.parameters, context);
+  gd::String parametersStr;
+  for (std::size_t i = 1; i < parametersCode.size(); ++i) {
+    if (i != 1) parametersStr += ", ";
+    parametersStr += parametersCode[i];
+  }
+
+  gd::String output = GetReturnType() == "string" ? "\"\"" : "0";
+
+  // Get object(s) concerned by function call
+  std::vector<gd::String> realObjects =
+      codeGenerator.ExpandObjectsName(parameters[0].GetPlainString(), context);
+  for (std::size_t i = 0; i < realObjects.size(); ++i) {
+    context.ObjectsListNeeded(realObjects[i]);
+
+    gd::String objectType = gd::GetTypeOfObject(globalObjectsAndGroups, objectsAndGroups, realObjects[i]);
+    const ObjectMetadata& objInfo = MetadataProvider::GetObjectMetadata(
+        codeGenerator.GetPlatform(), objectType);
+
+    // Build gd::String to access the object
+    codeGenerator.AddIncludeFiles(objInfo.includeFiles);
+    output = codeGenerator.GenerateObjectFunctionCall(
+        realObjects[i],
+        objInfo,
+        expressionInfo.codeExtraInformation,
+        parametersStr,
+        output,
+        context);
+  }
+
+  plainExpression += output;
+};
+
+void CallbacksForGeneratingExpressionCode::OnObjectBehaviorFunction(
+    gd::String functionName,
+    const std::vector<gd::Expression>& parameters,
+    const gd::ExpressionMetadata& expressionInfo) {
+  const gd::ObjectsContainer& globalObjectsAndGroups = codeGenerator.GetGlobalObjectsAndGroups();
+  const gd::ObjectsContainer& objectsAndGroups = codeGenerator.GetObjectsAndGroups();
+
+  codeGenerator.AddIncludeFiles(
+      expressionInfo.codeExtraInformation.GetIncludeFiles());
+  if (parameters.size() < 2) return;
+
+  // Launch custom code generator if needed
+  if (expressionInfo.codeExtraInformation.HasCustomCodeGenerator()) {
+    plainExpression += expressionInfo.codeExtraInformation.customCodeGenerator(
+        parameters, codeGenerator, context);
+    return;
+  }
+
+  // Prepare parameters
+  std::vector<gd::String> parametersCode =
+      codeGenerator.GenerateParametersCodes(
+          parameters, expressionInfo.parameters, context);
+  gd::String parametersStr;
+  for (std::size_t i = 2; i < parametersCode.size(); ++i) {
+    if (i != 2) parametersStr += ", ";
+    parametersStr += parametersCode[i];
+  }
+
+  // Get object(s) concerned by function call
+  std::vector<gd::String> realObjects =
+      codeGenerator.ExpandObjectsName(parameters[0].GetPlainString(), context);
+
+  gd::String output = GetReturnType() == "string" ? "\"\"" : "0";
+  for (std::size_t i = 0; i < realObjects.size(); ++i) {
+    context.ObjectsListNeeded(realObjects[i]);
+
+    // Cast the object if needed
+    gd::String behaviorType =
+        gd::GetTypeOfBehavior(globalObjectsAndGroups, objectsAndGroups, parameters[1].GetPlainString());
+    const BehaviorMetadata& autoInfo = MetadataProvider::GetBehaviorMetadata(
+        codeGenerator.GetPlatform(), behaviorType);
+
+    // Build gd::String to access the behavior
+    codeGenerator.AddIncludeFiles(autoInfo.includeFiles);
+    output = codeGenerator.GenerateObjectBehaviorFunctionCall(
+        realObjects[i],
+        parameters[1].GetPlainString(),
+        autoInfo,
+        expressionInfo.codeExtraInformation,
+        parametersStr,
+        output,
+        context);
+  }
+
+  plainExpression += output;
+};
+
+bool CallbacksForGeneratingExpressionCode::OnSubMathExpression(
+    const gd::Platform& platform,
+    const gd::ObjectsContainer& globalObjectsAndGroups,
+    const gd::ObjectsContainer& objectsAndGroups,
+    gd::Expression& expression) {
+  gd::String newExpression;
+
+  CallbacksForGeneratingExpressionCode callbacks(
+      newExpression, codeGenerator, context);
+
+  gd::ExpressionParser parser(expression.GetPlainString());
+  if (!parser.ParseMathExpression(platform, globalObjectsAndGroups, objectsAndGroups, callbacks)) {
+#if defined(GD_IDE_ONLY)
+    firstErrorStr = callbacks.GetFirstError();
+    firstErrorPos = callbacks.GetFirstErrorPosition();
+#endif
+    return false;
+  }
+
+  return true;
+}
+
+bool CallbacksForGeneratingExpressionCode::OnSubTextExpression(
+    const gd::Platform& platform,
+    const gd::ObjectsContainer& globalObjectsAndGroups,
+    const gd::ObjectsContainer& objectsAndGroups,
+    gd::Expression& expression) {
+  gd::String newExpression;
+
+  CallbacksForGeneratingExpressionCode callbacks(
+      newExpression, codeGenerator, context);
+
+  gd::ExpressionParser parser(expression.GetPlainString());
+  if (!parser.ParseStringExpression(platform, globalObjectsAndGroups, objectsAndGroups, callbacks)) {
+#if defined(GD_IDE_ONLY)
+    firstErrorStr = callbacks.GetFirstError();
+    firstErrorPos = callbacks.GetFirstErrorPosition();
+#endif
+    return false;
+  }
+
+  return true;
+}
+
+}  // namespace gd
--- a/Core/GDCore/Events/CodeGeneration/ExpressionsCodeGeneration.h
+++ b/Core/GDCore/Events/CodeGeneration/ExpressionsCodeGeneration.h
@@ -0,0 +1,77 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#ifndef EXPRESSIONSCODEGENERATION_H
+#define EXPRESSIONSCODEGENERATION_H
+
+#include <vector>
+#include "GDCore/Events/Parsers/ExpressionParser.h"
+#include "GDCore/String.h"
+namespace gd {
+class ExpressionMetadata;
+class Expression;
+class Project;
+class Layout;
+class Layout;
+class EventsCodeGenerationContext;
+class EventsCodeGenerator;
+}
+
+namespace gd {
+
+// TODO: Replace and remove (ExpressionCodeGenerator)
+
+/**
+ * \brief Used to generate code from expressions.
+ *
+ * Usage example :
+ * \code
+ *   gd::String expressionOutputCppCode;
+ *
+ *   CallbacksForGeneratingExpressionCode callbacks(expressionOutputCppCode,
+ * codeGenerator, context); gd::ExpressionParser
+ * parser(theOriginalGameDevelopExpression);
+ *   parser.ParseStringExpression(platform, project, scene, callbacks);
+ *
+ *   if (expressionOutputCppCode.empty()) expressionOutputCppCode = "\"\""; //If
+ * generation failed, we make sure output code is not empty. \endcode \see
+ * EventsCodeGenerator
+ */
+class GD_CORE_API CallbacksForGeneratingExpressionCode
+    : public gd::ParserCallbacks {
+ public:
+  CallbacksForGeneratingExpressionCode(gd::String& output,
+                                       EventsCodeGenerator& codeGenerator_,
+                                       EventsCodeGenerationContext& context_);
+  virtual ~CallbacksForGeneratingExpressionCode(){};
+
+  void OnConstantToken(gd::String text);
+  void OnStaticFunction(gd::String functionName,
+                        const std::vector<gd::Expression>& parameters,
+                        const gd::ExpressionMetadata& expressionInfo);
+  void OnObjectFunction(gd::String functionName,
+                        const std::vector<gd::Expression>& parameters,
+                        const gd::ExpressionMetadata& expressionInfo);
+  void OnObjectBehaviorFunction(gd::String functionName,
+                                const std::vector<gd::Expression>& parameters,
+                                const gd::ExpressionMetadata& expressionInfo);
+  bool OnSubMathExpression(const gd::Platform& platform,
+                           const gd::ObjectsContainer& project,
+                           const gd::ObjectsContainer& layout,
+                           gd::Expression& expression);
+  bool OnSubTextExpression(const gd::Platform& platform,
+                           const gd::ObjectsContainer& project,
+                           const gd::ObjectsContainer& layout,
+                           gd::Expression& expression);
+
+ private:
+  gd::String& plainExpression;
+  EventsCodeGenerator& codeGenerator;
+  EventsCodeGenerationContext& context;
+};
+
+}  // namespace gd
+
+#endif  // EXPRESSIONSCODEGENERATION_H
--- a/Core/GDCore/Events/CodeGeneration/VariableParserCallbacks.cpp
+++ b/Core/GDCore/Events/CodeGeneration/VariableParserCallbacks.cpp
@@ -0,0 +1,68 @@
+/*
+ * GDevelop C++ Platform
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#if defined(GD_IDE_ONLY)
+#include "VariableParserCallbacks.h"
+#include <string>
+#include <vector>
+#include "GDCore/Events/CodeGeneration/EventsCodeGenerationContext.h"
+#include "GDCore/Events/CodeGeneration/EventsCodeGenerator.h"
+#include "GDCore/Events/CodeGeneration/ExpressionCodeGenerator.h"
+#include "GDCore/Events/Parsers/VariableParser.h"
+#include "GDCore/Extensions/Metadata/MetadataProvider.h"
+#include "GDCore/Extensions/Metadata/ObjectMetadata.h"
+#include "GDCore/Extensions/Platform.h"
+#include "GDCore/Project/Layout.h"
+#include "GDCore/Project/Object.h"
+#include "GDCore/Project/Project.h"
+
+using namespace std;
+
+namespace gd {
+
+VariableCodeGenerationCallbacks::VariableCodeGenerationCallbacks(
+    gd::String& output_,
+    gd::EventsCodeGenerator& codeGenerator_,
+    gd::EventsCodeGenerationContext& context_,
+    const gd::EventsCodeGenerator::VariableScope& scope_)
+    : output(output_),
+      codeGenerator(codeGenerator_),
+      context(context_),
+      scope(scope_) {
+  if (scope == gd::EventsCodeGenerator::OBJECT_VARIABLE) {
+    std::cout << "ERROR: Initializing VariableCodeGenerationCallbacks with "
+                 "OBJECT_VARIABLE without object.";
+  }
+}
+
+VariableCodeGenerationCallbacks::VariableCodeGenerationCallbacks(
+    gd::String& output_,
+    gd::EventsCodeGenerator& codeGenerator_,
+    gd::EventsCodeGenerationContext& context_,
+    const gd::String& object_)
+    : output(output_),
+      codeGenerator(codeGenerator_),
+      context(context_),
+      scope(gd::EventsCodeGenerator::OBJECT_VARIABLE),
+      object(object_) {}
+
+void VariableCodeGenerationCallbacks::OnRootVariable(gd::String variableName) {
+  output += codeGenerator.GenerateGetVariable(variableName, scope, context, object);
+}
+
+void VariableCodeGenerationCallbacks::OnChildVariable(gd::String variableName) {
+  output += codeGenerator.GenerateVariableAccessor(variableName);
+}
+
+void VariableCodeGenerationCallbacks::OnChildSubscript(
+    gd::String stringExpression) {
+  gd::String argumentCode = gd::ExpressionCodeGenerator::GenerateExpressionCode(
+      codeGenerator, context, "string", stringExpression);
+
+  output += codeGenerator.GenerateVariableBracketAccessor(argumentCode);
+}
+
+}
+#endif
--- a/Core/GDCore/Events/CodeGeneration/VariableParserCallbacks.h
+++ b/Core/GDCore/Events/CodeGeneration/VariableParserCallbacks.h
@@ -0,0 +1,97 @@
+/*
+ * GDevelop C++ Platform
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#if defined(GD_IDE_ONLY)
+#ifndef VARIABLEPARSERCALLBACKS_H
+#define VARIABLEPARSERCALLBACKS_H
+
+#include <string>
+#include <vector>
+#include "GDCore/Events/Parsers/VariableParser.h"
+#include "GDCore/String.h"
+#include "EventsCodeGenerator.h"
+namespace gd {
+class EventsCodeGenerationContext;
+}  // namespace gd
+
+// TODO: Replace and remove (ExpressionCodeGenerator)
+namespace gd {
+
+/**
+ * \brief Callbacks called to generate the code for getting a variable.
+ *
+ * Usage example:
+ \code
+    VariableCodeGenerationCallbacks callbacks(output, eventsCodeGenerator,
+ context, VariableCodeGenerationCallbacks::LAYOUT_VARIABLE);
+
+    gd::VariableParser parser(parameter);
+    if ( !parser.Parse(callbacks) )
+    {
+        //Error during parsing the variable name:
+        output = "runtimeContext->GetSceneVariables().GetBadVariable()";
+    }
+
+    //"output" now contains the C++ code to return the variable.
+ \endcode
+ */
+class VariableCodeGenerationCallbacks : public gd::VariableParserCallbacks {
+ public:
+  /**
+   * \brief Default constructor for generating code for a layout/global
+   * variable. \param output The string in which the code will be generated.
+   * \param codeGenerator The code generator being used.
+   * \param context The current code generation context.
+   * \param scope The scope of the variable being accessed: LAYOUT_VARIABLE,
+   * PROJECT_VARIABLE.
+   */
+  VariableCodeGenerationCallbacks(gd::String& output,
+                                  gd::EventsCodeGenerator& codeGenerator_,
+                                  gd::EventsCodeGenerationContext& context_,
+                                  const gd::EventsCodeGenerator::VariableScope& scope_);
+  /**
+
+   * \brief Default constructor for generating code for an object variable.
+   * \param output The string in which the code will be generated.
+   * \param codeGenerator The code generator being used.
+   * \param context The current code generation context.
+   * \param object The name of the object
+   */
+  VariableCodeGenerationCallbacks(gd::String& output,
+                                  gd::EventsCodeGenerator& codeGenerator_,
+                                  gd::EventsCodeGenerationContext& context_,
+                                  const gd::String& object);
+
+  /**
+   * \brief Called when the first variable has been parsed.
+   * \param variableName The variable name.
+   */
+  virtual void OnRootVariable(gd::String variableName);
+
+  /**
+   * \brief Called when accessing the child of a structure variable.
+   * \param variableName The child variable name.
+   */
+  virtual void OnChildVariable(gd::String variableName);
+
+  /**
+   * \brief Called when accessing the child of a structure variable using a
+   * string expression in square brackets. \param variableName The expression
+   * used to access the child variable.
+   */
+  virtual void OnChildSubscript(gd::String stringExpression);
+
+ private:
+  gd::String& output;
+  gd::EventsCodeGenerator& codeGenerator;
+  gd::EventsCodeGenerationContext& context;
+  gd::EventsCodeGenerator::VariableScope scope;
+  const gd::String object;  ///< The object name, when scope == OBJECT_VARIABLE.
+};
+
+}
+
+#endif  // VARIABLEPARSERCALLBACKS_H
+#endif
--- a/Core/GDCore/Events/Event.cpp
+++ b/Core/GDCore/Events/Event.cpp
@@ -5,12 +5,8 @@
 */

 #include "GDCore/Events/Event.h"
-
-#include "GDCore/Events/Builtin/AsyncEvent.h"
 #include "GDCore/Events/CodeGeneration/EventsCodeGenerator.h"
 #include "GDCore/Events/EventsList.h"
-#include "GDCore/Events/EventVisitor.h"
-#include "GDCore/Extensions/Metadata/MetadataProvider.h"
 #include "GDCore/Extensions/Platform.h"
 #include "GDCore/Extensions/PlatformExtension.h"

@@ -69,41 +65,10 @@ gd::String BaseEvent::GenerateEventCode(
  return "";
 }

-void BaseEvent::PreprocessAsyncActions(const gd::Platform& platform) {
-  if (!CanHaveSubEvents()) return;
-  for (const auto& actionsList : GetAllActionsVectors())
-    for (std::size_t aId = 0; aId < actionsList->size(); ++aId) {
-      const auto& action = actionsList->at(aId);
-      const gd::InstructionMetadata& actionMetadata =
-          gd::MetadataProvider::GetActionMetadata(platform, action.GetType());
-      if (actionMetadata.IsAsync() &&
-          (!actionMetadata.IsOptionallyAsync() || action.IsAwaited())) {
-        gd::InstructionsList remainingActions;
-        remainingActions.InsertInstructions(
-            *actionsList, aId + 1, actionsList->size() - 1);
-        gd::AsyncEvent asyncEvent(action, remainingActions, GetSubEvents());
-
-        // Ensure that the local event no longer has any of the actions/subevent
-        // after the async function
-        actionsList->RemoveAfter(aId);
-        GetSubEvents().Clear();
-
-        GetSubEvents().InsertEvent(asyncEvent);
-
-        // We just moved all the rest, there's nothing left to do in this event.
-        return;
-      }
-    }
-};
-
 void BaseEvent::Preprocess(gd::EventsCodeGenerator& codeGenerator,
                           gd::EventsList& eventList,
                           std::size_t indexOfTheEventInThisList) {
-  if (IsDisabled()) return;
-
-  PreprocessAsyncActions(codeGenerator.GetPlatform());
-
-  if (!MustBePreprocessed()) return;
+  if (IsDisabled() || !MustBePreprocessed()) return;

  try {
    if (type.empty()) return;
@@ -141,14 +106,6 @@ void BaseEvent::Preprocess(gd::EventsCodeGenerator& codeGenerator,
  }
 }

-bool BaseEvent::AcceptVisitor(gd::EventVisitor& eventVisitor) {
-  return eventVisitor.VisitEvent(*this);
-}
-
-void BaseEvent::AcceptVisitor(gd::ReadOnlyEventVisitor& eventVisitor) const {
-  eventVisitor.VisitEvent(*this);
-}
-
 BaseEventSPtr GD_CORE_API CloneRememberingOriginalEvent(BaseEventSPtr event) {
  gd::BaseEventSPtr copy(event->Clone());
  // Original event is either the original event of the copied event, or the
--- a/Core/GDCore/Events/Event.h
+++ b/Core/GDCore/Events/Event.h
@@ -10,13 +10,12 @@
 #include <iostream>
 #include <memory>
 #include <vector>
-
 #include "GDCore/Events/Instruction.h"
 #include "GDCore/Events/InstructionsList.h"
-#include "GDCore/Extensions/Metadata/InstructionMetadata.h"
 #include "GDCore/String.h"
 namespace gd {
 class EventsList;
+class MainFrameWrapper;
 class Project;
 class Layout;
 class EventsCodeGenerator;
@@ -24,9 +23,7 @@ class EventsCodeGenerationContext;
 class Platform;
 class SerializerElement;
 class Instruction;
-class EventVisitor;
-class ReadOnlyEventVisitor;
-}  // namespace gd
+}

 namespace gd {

@@ -93,8 +90,8 @@ class GD_CORE_API BaseEvent {
  bool HasSubEvents() const;

  /**
-   * \brief Return a list of all conditions of the event.
-   * \note Used to preprocess or search in the conditions.
+   * Event must be able to return all conditions std::vector they have.
+   * Used to preprocess the conditions.
   */
  virtual std::vector<gd::InstructionsList*> GetAllConditionsVectors() {
    std::vector<gd::InstructionsList*> noConditions;
@@ -107,8 +104,8 @@ class GD_CORE_API BaseEvent {
  };

  /**
-   * \brief Return a list of all actions of the event.
-   * \note Used to preprocess or search in the actions.
+   * Event must be able to return all actions std::vector they have.
+   * Used to preprocess the actions.
   */
  virtual std::vector<gd::InstructionsList*> GetAllActionsVectors() {
    std::vector<gd::InstructionsList*> noActions;
@@ -121,33 +118,15 @@ class GD_CORE_API BaseEvent {
  };

  /**
-   * \brief Return a list of all strings of the event.
-   * \note Used to preprocess or search in the event strings.
+   * Event must be able to return all expressions they have.
+   * Used to preprocess the expressions.
   */
-  virtual std::vector<gd::String> GetAllSearchableStrings() const {
-    std::vector<gd::String> noSearchableStrings;
-    return noSearchableStrings;
-  };
-
-  virtual bool ReplaceAllSearchableStrings(
-      std::vector<gd::String> newSearchableString) {
-    return false;
-  };
-
-  /**
-   * \brief Return a list of all expressions of the event, each with their associated metadata.
-   * \note Used to preprocess or search in the expressions of the event.
-   */
-  virtual std::vector<std::pair<gd::Expression*, gd::ParameterMetadata> >
-  GetAllExpressionsWithMetadata() {
-    std::vector<std::pair<gd::Expression*, gd::ParameterMetadata> > noExpr;
+  virtual std::vector<gd::Expression*> GetAllExpressions() {
+    std::vector<gd::Expression*> noExpr;
    return noExpr;
  };
-  virtual std::vector<
-      std::pair<const gd::Expression*, const gd::ParameterMetadata> >
-  GetAllExpressionsWithMetadata() const {
-    std::vector<std::pair<const gd::Expression*, const gd::ParameterMetadata> >
-        noExpr;
+  virtual std::vector<const gd::Expression*> GetAllExpressions() const {
+    std::vector<const gd::Expression*> noExpr;
    return noExpr;
  };

@@ -211,11 +190,6 @@ class GD_CORE_API BaseEvent {
                          gd::EventsList& eventList,
                          std::size_t indexOfTheEventInThisList);

-  /**
-   * A function that turns all async member actions into an Async subevent for code generation.
-   */
-  void PreprocessAsyncActions(const gd::Platform& platform);
-
  /**
   * \brief If MustBePreprocessed is redefined to return true, the
   * gd::EventMetadata::preprocessing associated to the event will be called to
@@ -240,9 +214,6 @@ class GD_CORE_API BaseEvent {
   */
  virtual void UnserializeFrom(gd::Project& project,
                               const SerializerElement& element){};
-
-  virtual bool AcceptVisitor(gd::EventVisitor& eventVisitor);
-  virtual void AcceptVisitor(gd::ReadOnlyEventVisitor& eventVisitor) const;
  ///@}

  /** \name Common properties
@@ -281,6 +252,7 @@ class GD_CORE_API BaseEvent {
   * \brief True if the event should be folded in the events editor.
   */
  bool IsFolded() const { return folded; }
+
  ///@}

  std::weak_ptr<gd::BaseEvent>
--- a/Core/GDCore/Events/EventVisitor.h
+++ b/Core/GDCore/Events/EventVisitor.h
@@ -1,76 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the MIT License.
- */
-#pragma once
-
-#include <iostream>
-#include <memory>
-#include <vector>
-
-#include "GDCore/String.h"
-
-namespace gd {
-class BaseEvent;
-class LinkEvent;
-}  // namespace gd
-
-namespace gd {
-
-/**
- * \brief Visitor of any kind of event.
- *
- * \ingroup Events
- */
-class GD_CORE_API EventVisitor {
- public:
-  virtual ~EventVisitor(){};
-
-  /**
-   * Called to do some work on an event.
-   * 
-   * \return true if the event must be deleted from the events list, false
-   * otherwise.
-   */
-  virtual bool VisitEvent(gd::BaseEvent& linkEvent) = 0;
-  
-  /**
-   * Called to do some work on a link event.
-   * 
-   * Note that VisitEvent is also called with this event.
-   * 
-   * \return true if the event must be deleted from the events list, false
-   * otherwise.
-   */
-  virtual bool VisitLinkEvent(gd::LinkEvent& linkEvent) = 0;
-};
-
-/**
- * \brief Visitor of any kind of event.
- *
- * \ingroup Events
- */
-class GD_CORE_API ReadOnlyEventVisitor {
- public:
-  virtual ~ReadOnlyEventVisitor(){};
-
-  /**
-   * Called to do some work on an event.
-   */
-  virtual void VisitEvent(const gd::BaseEvent& linkEvent) = 0;
-
-  /**
-   * Called to do some work on a link event.
-   * 
-   * Note that VisitEvent is also called with this event.
-   */
-  virtual void VisitLinkEvent(const gd::LinkEvent& linkEvent) = 0;
-
-  /**
-   * @brief Abort the iteration on the events.
-   */
-  virtual void StopAnyEventIteration() = 0;
-};
-
-}
--- a/Core/GDCore/Events/EventsList.cpp
+++ b/Core/GDCore/Events/EventsList.cpp
@@ -5,7 +5,6 @@
 */

 #include "EventsList.h"
-
 #include "GDCore/Events/Event.h"
 #include "GDCore/Project/Project.h"
 #include "GDCore/Tools/Log.h"
@@ -100,22 +99,6 @@ bool EventsList::Contains(const gd::BaseEvent& eventToSearch,
  return false;
 }

-bool EventsList::MoveEventToAnotherEventsList(const gd::BaseEvent& eventToMove,
-                                              gd::EventsList& newEventsList,
-                                              std::size_t newPosition) {
-  for (std::size_t i = 0; i < GetEventsCount(); ++i) {
-    if (events[i].get() == &eventToMove) {
-      std::shared_ptr<BaseEvent> event = events[i];
-      events.erase(events.begin() + i);
-
-      newEventsList.InsertEvent(event, newPosition);
-      return true;
-    }
-  }
-
-  return false;
-}
-
 EventsList::EventsList(const EventsList& other) { Init(other); }

 EventsList& EventsList::operator=(const EventsList& other) {
--- a/Core/GDCore/Events/EventsList.h
+++ b/Core/GDCore/Events/EventsList.h
@@ -52,8 +52,7 @@ class GD_CORE_API EventsList {
   * \brief Insert the specified event to the list.
   * \note The event passed by parameter is not copied.
   * \param event The smart pointer to the event that must be inserted into the
-   * list
-   * \param position Insertion position. If the position is invalid, the
+   * list \param position Insertion position. If the position is invalid, the
   * object is inserted at the end of the objects list.
   */
  void InsertEvent(std::shared_ptr<gd::BaseEvent> event,
@@ -143,25 +142,6 @@ class GD_CORE_API EventsList {
   */
  bool Contains(const gd::BaseEvent& eventToSearch,
                bool recursive = true) const;
-
-  /**
-   * Move the specified event, that must be in the events list, to another
-   * events list *without* invalidating the event (i.e: without
-   * destroying/cloning it) in memory.
-   *
-   * \warning newEventsList is supposed not to be contained inside the event
-   * (you should not try
-   * to move an event inside one of its children/grand children events).
-   *
-   * \param eventToMove The event to be moved
-   * \param newEventsList The new events list
-   * \param newPosition The position in the new events list
-   * \return true if the move was made, false otherwise (for example, if
-   * eventToMove is not found in the list)
-   */
-  bool MoveEventToAnotherEventsList(const gd::BaseEvent& eventToMove,
-                                    gd::EventsList& newEventsList,
-                                    std::size_t newPosition);
  ///@}

  /** \name std::vector API compatibility
--- a/Core/GDCore/Events/Expression.cpp
+++ b/Core/GDCore/Events/Expression.cpp
@@ -1,41 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the MIT License.
- */
-
-#include "GDCore/Events/Expression.h"
-
-#include "GDCore/Events/Parsers/ExpressionParser2.h"
-#include "GDCore/String.h"
-
-namespace gd {
-
-Expression::Expression() : node(nullptr) {};
-
-Expression::Expression(gd::String plainString_)
-    : node(nullptr), plainString(plainString_) {};
-
-Expression::Expression(const char* plainString_)
-    : node(nullptr), plainString(plainString_) {};
-
-Expression::Expression(const Expression& copy)
-    : node(nullptr), plainString{copy.plainString} {};
-
-Expression& Expression::operator=(const Expression& expression) {
-  plainString = expression.plainString;
-  node = nullptr;
-  return *this;
-};
-
-Expression::~Expression(){};
-
-ExpressionNode* Expression::GetRootNode() const {
-  if (!node) {
-    gd::ExpressionParser2 parser = ExpressionParser2();
-    node = std::move(parser.ParseExpression(plainString));
-  }
-  return node.get();
-}
-
-}  // namespace gd
--- a/Core/GDCore/Events/Expression.h
+++ b/Core/GDCore/Events/Expression.h
@@ -6,15 +6,7 @@

 #ifndef GDCORE_EXPRESSION_H
 #define GDCORE_EXPRESSION_H
-
 #include "GDCore/String.h"
-#include <memory>
-
-namespace gd {
-class ExpressionParser2;
-class ObjectsContainer;
-struct ExpressionNode;
-}  // namespace gd

 namespace gd {

@@ -32,49 +24,32 @@ class GD_CORE_API Expression {
  /**
   * \brief Construct an empty expression
   */
-  Expression();
+  Expression(){};

  /**
   * \brief Construct an expression from a string
   */
-  Expression(gd::String plainString_);
+  Expression(gd::String plainString_) : plainString(plainString_){};

  /**
   * \brief Construct an expression from a const char *
   */
-  Expression(const char* plainString_);
-
-  /**
-   * \brief Copy construct an expression.
-   */
-  Expression(const Expression& copy);
-
-  /**
-   * \brief Expression affectation overriding.
-   */
-  Expression& operator=(const Expression& expression);
+  Expression(const char* plainString_) : plainString(plainString_){};

  /**
   * \brief Get the plain string representing the expression
   */
  inline const gd::String& GetPlainString() const { return plainString; };

-  /**
-   * @brief Get the expression node.
-   * @return std::unique_ptr<gd::ExpressionNode>
-   */
-  gd::ExpressionNode* GetRootNode() const;
-
  /**
   * \brief Mimics std::string::c_str
   */
  inline const char* c_str() const { return plainString.c_str(); };

-  virtual ~Expression();
+  virtual ~Expression(){};

 private:
  gd::String plainString;  ///< The expression string
-  mutable std::unique_ptr<gd::ExpressionNode> node;
 };

 }  // namespace gd
--- a/Core/GDCore/Events/Instruction.cpp
+++ b/Core/GDCore/Events/Instruction.cpp
@@ -4,12 +4,9 @@
 * reserved. This project is released under the MIT License.
 */
 #include "GDCore/Events/Instruction.h"
-
 #include <assert.h>
-
 #include <iostream>
 #include <vector>
-
 #include "GDCore/Events/Expression.h"
 #include "GDCore/Events/InstructionsList.h"
 #include "GDCore/String.h"
@@ -18,14 +15,18 @@ namespace gd {

 gd::Expression Instruction::badExpression("");

-Instruction::Instruction(gd::String type_) : type(type_), inverted(false) {
+Instruction::Instruction(gd::String type_)
+    : type(type_),
+      inverted(false) {
  parameters.reserve(8);
 }

 Instruction::Instruction(gd::String type_,
                         const std::vector<gd::Expression>& parameters_,
                         bool inverted_)
-    : type(type_), inverted(inverted_), parameters(parameters_) {
+    : type(type_),
+      inverted(inverted_),
+      parameters(parameters_) {
  parameters.reserve(8);
 }

@@ -55,21 +56,4 @@ void Instruction::SetParameter(std::size_t nb, const gd::Expression& val) {
  parameters[nb] = val;
 }

-void Instruction::AddParameter(const gd::Expression& val) {
-  parameters.push_back(val);
-}
-
-std::shared_ptr<Instruction> GD_CORE_API
-CloneRememberingOriginalElement(std::shared_ptr<Instruction> instruction) {
-  std::shared_ptr<Instruction> copy =
-      std::make_shared<Instruction>(*instruction);
-  // Original instruction is either the original instruction of the copied
-  // instruction, or the instruction copied.
-  copy->originalInstruction = instruction->originalInstruction.expired()
-                                  ? instruction
-                                  : instruction->originalInstruction;
-
-  return copy;
-}
-
 }  // namespace gd
--- a/Core/GDCore/Events/Instruction.h
+++ b/Core/GDCore/Events/Instruction.h
@@ -5,9 +5,7 @@
 */
 #ifndef INSTRUCTION_H
 #define INSTRUCTION_H
-#include <memory>
 #include <vector>
-
 #include "GDCore/Events/Expression.h"
 #include "GDCore/Events/InstructionsList.h"
 #include "GDCore/String.h"
@@ -72,22 +70,6 @@ class GD_CORE_API Instruction {
   */
  void SetInverted(bool inverted_) { inverted = inverted_; }

-  /**
-   * \brief Return true if the async instruction should be awaited.
-   * This is not relevant if the instruction is not optionally asynchronous.
-   *
-   * \return true if the instruction is to be awaited
-   */
-  bool IsAwaited() const { return awaitAsync; }
-
-  /**
-   * \brief Set if the async instruction is to be awaited or not.
-   * This is not relevant if the instruction is not optionally asynchronous.
-   *
-   * \param inverted true if the instruction must be awaited
-   */
-  void SetAwaited(bool awaited) { awaitAsync = awaited; }
-
  /**
   * \brief Return the number of parameters of the instruction.
   */
@@ -123,11 +105,6 @@ class GD_CORE_API Instruction {
   */
  void SetParameter(std::size_t nb, const gd::Expression& val);

-  /** Add a parameter at the end
-   * \param val The new value of the parameter
-   */
-  void AddParameter(const gd::Expression& val);
-
  /** \brief Get a reference to the std::vector containing the parameters.
   * \return A std::vector containing the parameters
   */
@@ -154,47 +131,17 @@ class GD_CORE_API Instruction {
   */
  inline gd::InstructionsList& GetSubInstructions() { return subInstructions; };

-  /**
-   * \brief Return the original instruction this instruction was copied from.
-   *
-   * Useful to get reference to the original instruction in memory during code
-   * generation, to ensure stable unique identifiers.
-   */
-  std::weak_ptr<Instruction> GetOriginalInstruction() {
-    return originalInstruction;
-  };
-
-  friend std::shared_ptr<Instruction> CloneRememberingOriginalElement(
-      std::shared_ptr<Instruction> instruction);
-
 private:
  gd::String type;  ///< Instruction type
  bool inverted;  ///< True if the instruction if inverted. Only applicable for
                  ///< instruction used as conditions by events
-  bool awaitAsync =
-      false;  ///< Tells the code generator whether the optionally asynchronous
-              ///< instruction should be generated as asynchronous (awaited) or not.
  mutable std::vector<gd::Expression>
      parameters;                        ///< Vector containing the parameters
  gd::InstructionsList subInstructions;  ///< Sub instructions, if applicable.

-  std::weak_ptr<Instruction>
-      originalInstruction;  ///< Pointer used to remember which gd::Instruction
-                            ///< this instruction was copied from. Useful to
-                            ///< ensure the stability of code generation (as
-                            ///< some part of code generation uses the pointer
-                            ///< to the instruction as a unique identifier).
-
  static gd::Expression badExpression;
 };

-/**
- * Clone the given instruction, returning an instruction for which
- * `GetOriginalInstruction()` returns the originally copied instruction.
- */
-std::shared_ptr<Instruction> GD_CORE_API
-CloneRememberingOriginalElement(std::shared_ptr<Instruction> instruction);
-
 }  // namespace gd

 #endif  // INSTRUCTION_H
--- a/Core/GDCore/Events/InstructionsList.cpp
+++ b/Core/GDCore/Events/InstructionsList.cpp
@@ -5,7 +5,6 @@
 */

 #include "InstructionsList.h"
-
 #include "GDCore/Events/Instruction.h"
 #include "GDCore/Project/Project.h"
 #include "Serialization.h"
@@ -32,10 +31,6 @@ void InstructionsList::InsertInstructions(const InstructionsList& list,
  }
 }

-void InstructionsList::RemoveAfter(const size_t position) {
-  elements.resize(position);
-}
-
 void InstructionsList::SerializeTo(SerializerElement& element) const {
  EventsListSerialization::SerializeInstructionsTo(*this, element);
 }
--- a/Core/GDCore/Events/InstructionsList.h
+++ b/Core/GDCore/Events/InstructionsList.h
@@ -6,10 +6,9 @@

 #ifndef GDCORE_INSTRUCTIONSLIST_H
 #define GDCORE_INSTRUCTIONSLIST_H
-#include "GDCore/Tools/SPtrList.h"
 #include <memory>
 #include <vector>
-
+#include "GDCore/Tools/SPtrList.h"
 namespace gd {
 class Instruction;
 }
@@ -23,11 +22,11 @@ class SerializerElement;
 namespace gd {

 class InstructionsList : public SPtrList<gd::Instruction> {
-public:
-  void InsertInstructions(const InstructionsList &list, size_t begin,
-                          size_t end, size_t position = (size_t)-1);
-
-  void RemoveAfter(size_t position);
+ public:
+  void InsertInstructions(const InstructionsList& list,
+                          size_t begin,
+                          size_t end,
+                          size_t position = (size_t)-1);

  /** \name Serialization
   */
@@ -36,17 +35,17 @@ public:
   * \brief Serialize the instructions to the specified element
   * \see EventsListSerialization
   */
-  void SerializeTo(gd::SerializerElement &element) const;
+  void SerializeTo(gd::SerializerElement& element) const;

  /**
   * \brief Load the instructions from the specified element
   * \see EventsListSerialization
   */
-  void UnserializeFrom(gd::Project &project,
-                       const gd::SerializerElement &element);
+  void UnserializeFrom(gd::Project& project,
+                       const gd::SerializerElement& element);
  ///@}
 };

-} // namespace gd
+}  // namespace gd

 #endif
--- a/Core/GDCore/Events/Parsers/ExpressionParser.cpp
+++ b/Core/GDCore/Events/Parsers/ExpressionParser.cpp
@@ -0,0 +1,897 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "GDCore/Events/Parsers/ExpressionParser.h"
+#include <algorithm>
+#include <iostream>
+#include "GDCore/CommonTools.h"
+#include "GDCore/Events/Expression.h"
+#include "GDCore/Extensions/Metadata/ExpressionMetadata.h"
+#include "GDCore/Extensions/Metadata/InstructionMetadata.h"
+#include "GDCore/Extensions/Metadata/MetadataProvider.h"
+#include "GDCore/Extensions/Platform.h"
+#include "GDCore/Project/Layout.h"
+#include "GDCore/Project/Project.h"
+#include "GDCore/Tools/Localization.h"
+
+using namespace std;
+
+namespace gd {
+
+gd::String ExpressionParser::parserSeparators = " ,+-*/%.<>=&|;()#^![]{}";
+
+size_t ExpressionParser::GetMinimalParametersNumber(
+    const std::vector<gd::ParameterMetadata>& parametersInfos) {
+  size_t nb = 0;
+  for (std::size_t i = 0; i < parametersInfos.size(); ++i) {
+    if (!parametersInfos[i].optional && !parametersInfos[i].codeOnly) nb++;
+  }
+
+  return nb;
+}
+
+size_t ExpressionParser::GetMaximalParametersNumber(
+    const std::vector<gd::ParameterMetadata>& parametersInfos) {
+  size_t nb = 0;
+  for (std::size_t i = 0; i < parametersInfos.size(); ++i) {
+    if (!parametersInfos[i].codeOnly) nb++;
+  }
+
+  return nb;
+}
+
+/**
+ * Add blank parameters when code-only parameters are expected.
+ * \param Parameters information
+ * \param vector of parameters without code only parameters.
+ */
+std::vector<gd::Expression> CompleteParameters(
+    const std::vector<gd::ParameterMetadata>& parametersInfo,
+    const std::vector<gd::Expression>& parameters) {
+  std::vector<gd::Expression> completeParameters = parameters;
+  for (std::size_t i = 0; i < parametersInfo.size();
+       ++i)  // Code only parameters are not included in expressions parameters.
+  {
+    if (parametersInfo[i].codeOnly) {
+      if (i > completeParameters.size()) {
+        cout << "Bad parameter count in expression.";
+      }
+
+      if (i >= completeParameters.size())
+        completeParameters.push_back(gd::Expression(""));
+      else
+        completeParameters.insert(completeParameters.begin() + i,
+                                  gd::Expression(""));
+    } else {
+      if (i >= completeParameters.size()) {
+        completeParameters.push_back(gd::Expression(""));
+      }
+    }
+  }
+  return completeParameters;
+}
+
+bool ExpressionParser::ValidSyntax(const gd::String& str) {
+  static const gd::String numerics = "0123456789.e";
+  static const gd::String operators = "+/*-%";
+
+  size_t parenthesisLevel = 0;
+  gd::String lastOperator;
+
+  bool parsingNumber = false;
+  bool parsingScientificNotationNumber = false;
+  bool parsingDecimalNumber = false;
+  bool requestNumber = false;
+  gd::String lastNumber;
+  bool numberWasParsedLast = false;
+
+  for (auto it = str.begin(); it != str.end(); ++it) {
+    char32_t currentChar = *it;
+    if (currentChar == U' ' || currentChar == U'\n') {
+      if (requestNumber) {
+        firstErrorStr = _("Number expected");
+
+        return false;
+      }
+
+      if (parsingNumber) {
+        parsingNumber = false;
+        parsingScientificNotationNumber = false;
+        parsingDecimalNumber = false;
+        requestNumber = false;
+        lastNumber.clear();
+        numberWasParsedLast = true;
+      }
+    } else if (numerics.find(currentChar) != gd::String::npos) {
+      requestNumber = false;
+
+      if (currentChar == U'.') {
+        if (!parsingNumber) {
+          firstErrorStr = _("Syntax error");
+
+          return false;
+        }
+
+        if (parsingDecimalNumber) {
+          firstErrorStr = _("Syntax error in a number.");
+
+          return false;
+        }
+
+        parsingDecimalNumber = true;
+      }
+
+      if (currentChar == U'e') {
+        if (parsingScientificNotationNumber) {
+          firstErrorStr = _("Syntax error in a number.");
+
+          return false;
+        }
+
+        parsingScientificNotationNumber = true;
+        requestNumber = true;
+      }
+
+      if (numberWasParsedLast) {
+        firstErrorStr = _("Operator missing before a number");
+
+        return false;
+      }
+
+      parsingNumber = true;
+      lastNumber += currentChar;
+    } else if (currentChar == U')') {
+      if (requestNumber) {
+        firstErrorStr = _("Number expected");
+
+        return false;
+      }
+
+      if (parsingNumber) {
+        parsingNumber = false;
+        parsingScientificNotationNumber = false;
+        parsingDecimalNumber = false;
+        lastNumber.clear();
+        numberWasParsedLast = true;
+      }
+
+      if (!numberWasParsedLast) {
+        firstErrorStr = _("Superfluous operator before a paranthesis");
+
+        return false;
+      }
+
+      if (parenthesisLevel > 0)
+        parenthesisLevel--;
+      else {
+        firstErrorStr = _("Bad closing paranthesis");
+
+        return false;
+      }
+
+      auto previousIt = it;
+      --previousIt;
+      if (*previousIt == U'(') {
+        firstErrorStr = _("Empty paranthesis");
+
+        return false;
+      }
+    } else if (currentChar == U'(') {
+      if (requestNumber) {
+        firstErrorStr = _("Number expected");
+
+        return false;
+      }
+
+      if (parsingNumber) {
+        parsingNumber = false;
+        parsingScientificNotationNumber = false;
+        parsingDecimalNumber = false;
+        lastNumber.clear();
+        numberWasParsedLast = true;
+      }
+
+      if (numberWasParsedLast) {
+        firstErrorStr = _("Operator missing before a paranthesis");
+
+        return false;
+      }
+
+      parenthesisLevel++;
+      numberWasParsedLast = false;
+    } else if (operators.find(currentChar) != gd::String::npos) {
+      if (currentChar == U'-' && parsingNumber &&
+          parsingScientificNotationNumber) {
+        lastNumber += currentChar;
+        requestNumber = true;
+      } else {
+        if (requestNumber) {
+          firstErrorStr = _("Number expected");
+
+          return false;
+        }
+
+        if (parsingNumber) {
+          parsingNumber = false;
+          parsingScientificNotationNumber = false;
+          parsingDecimalNumber = false;
+          lastNumber.clear();
+          numberWasParsedLast = true;
+        }
+
+        if (currentChar != U'-' && currentChar != U'+' &&
+            !numberWasParsedLast) {
+          firstErrorStr = _("Operators without any number between them");
+
+          return false;
+        }
+
+        numberWasParsedLast = false;
+      }
+    } else {
+      firstErrorStr = _("Syntax error");
+
+      return false;
+    }
+  }
+
+  if (parsingNumber) {
+    parsingNumber = false;
+    parsingScientificNotationNumber = false;
+    parsingDecimalNumber = false;
+    lastNumber.clear();
+    numberWasParsedLast = true;
+  } else if (requestNumber) {
+    firstErrorStr = _("Number expected");
+
+    return false;
+  }
+
+  if (parenthesisLevel != 0) {
+    firstErrorStr = _("Paranthesis mismatch");
+
+    return false;
+  }
+
+  if (!numberWasParsedLast) {
+    firstErrorStr = _("Alone operator at the end of the expression");
+
+    return false;
+  }
+
+  return true;
+}
+
+bool ExpressionParser::ParseMathExpression(const gd::Platform& platform,
+                                           const gd::ObjectsContainer& project,
+                                           const gd::ObjectsContainer& layout,
+                                           gd::ParserCallbacks& callbacks) {
+  callbacks.SetReturnType("expression");
+  gd::String expression = expressionPlainString;
+
+  size_t parsePosition = 0;
+
+  size_t firstPointPos = expression.find(".");
+  size_t firstParPos = expression.find("(");
+
+  gd::String expressionWithoutFunctions;
+  gd::String nonFunctionToken;
+  size_t nonFunctionTokenStartPos = gd::String::npos;
+
+  while (firstPointPos != string::npos || firstParPos != string::npos) {
+    // Identify name
+    size_t nameEnd = firstPointPos < firstParPos ? firstPointPos : firstParPos;
+    size_t nameStart = expression.find_last_of(parserSeparators, nameEnd - 1);
+    nameStart++;
+
+    gd::String nameBefore = expression.substr(nameStart, nameEnd - nameStart);
+    gd::String objectName = nameBefore.FindAndReplace("~", " ");
+
+    // Identify function name
+    gd::String functionName = nameBefore;
+    size_t functionNameEnd = nameEnd;
+    vector<gd::Expression> parameters;
+
+    bool nameIsFunction = firstPointPos > firstParPos;
+    if (!nameIsFunction) {
+      parameters.push_back(gd::Expression(objectName));
+      functionNameEnd = expression.find_first_of(" (", nameEnd);
+      if (nameEnd + 1 < expression.length())
+        functionName =
+            expression.substr(nameEnd + 1, functionNameEnd - (nameEnd + 1));
+      if (functionNameEnd == string::npos) {
+        functionName = "";
+        functionNameEnd = expression.length() - 1;
+      }
+    }
+
+    // Now we're going to identify the expression
+    gd::ExpressionMetadata instructionInfos;
+
+    if (functionName.substr(0, functionName.length() - 1)
+            .find_first_of(parserSeparators) == string::npos) {
+      bool functionFound = false;
+      bool staticFunctionFound = false;
+      bool objectFunctionFound = false;
+      bool behaviorFunctionFound = false;
+
+      // First try to bind to a static expression
+      if (nameIsFunction &&
+          MetadataProvider::HasExpression(platform, functionName)) {
+        functionFound = true;
+        staticFunctionFound = true;
+        instructionInfos =
+            MetadataProvider::GetExpressionMetadata(platform, functionName);
+      }
+      // Then search in object expression
+      else if (!nameIsFunction &&
+               MetadataProvider::HasObjectExpression(
+                   platform,
+                   gd::GetTypeOfObject(project, layout, objectName),
+                   functionName)) {
+        functionFound = true;
+        objectFunctionFound = true;
+        instructionInfos = MetadataProvider::GetObjectExpressionMetadata(
+            platform,
+            gd::GetTypeOfObject(project, layout, objectName),
+            functionName);
+      }
+      // And in behaviors expressions
+      else if (!nameIsFunction) {
+        size_t firstDoublePoints = functionName.find("::");
+        if (firstDoublePoints != string::npos) {
+          gd::String autoName = functionName.substr(0, firstDoublePoints);
+          if (firstDoublePoints + 2 < functionName.length())
+            functionName = functionName.substr(firstDoublePoints + 2,
+                                               functionName.length());
+          else
+            functionName = "";
+
+          if (MetadataProvider::HasBehaviorExpression(
+                  platform,
+                  gd::GetTypeOfBehavior(project, layout, autoName),
+                  functionName)) {
+            parameters.push_back(gd::Expression(autoName));
+            functionFound = true;
+            behaviorFunctionFound = true;
+
+            instructionInfos = MetadataProvider::GetBehaviorExpressionMetadata(
+                platform,
+                gd::GetTypeOfBehavior(project, layout, autoName),
+                functionName);
+
+            // Verify that object has behavior.
+            vector<gd::String> behaviors =
+                gd::GetBehaviorsOfObject(project, layout, objectName);
+            if (find(behaviors.begin(), behaviors.end(), autoName) ==
+                behaviors.end()) {
+              cout << "Bad behavior requested" << endl;
+              functionFound = false;
+            }
+          }
+        }
+      }
+
+      if (functionFound)  // Add the function
+      {
+        // Identify parameters
+        size_t parametersEnd = expression.find_first_of("(", functionNameEnd);
+        gd::String currentParameterStr;
+        char32_t previousChar = '(';
+        bool takeSymbolsInAccount = true;
+        if (parametersEnd != string::npos) {
+          size_t level = 0;
+          parametersEnd++;
+
+          while (parametersEnd < expression.length() &&
+                 !(expression[parametersEnd] == ')' && level == 0)) {
+            // Be sure we are not in quotes
+            if (expression[parametersEnd] == U'\"' && previousChar != U'\\')
+              takeSymbolsInAccount = !takeSymbolsInAccount;
+
+            // So as to be sure paranthesis don't belong to a parameter
+            if (expression[parametersEnd] == U'(' && takeSymbolsInAccount)
+              level++;
+            if (expression[parametersEnd] == U')' && takeSymbolsInAccount)
+              level--;
+
+            // Add the character to the current parameter or terminate the
+            // latter
+            if ((expression[parametersEnd] == U',' && level == 0) &&
+                takeSymbolsInAccount) {
+              parameters.push_back(currentParameterStr);
+              currentParameterStr.clear();
+            } else
+              currentParameterStr += expression[parametersEnd];
+
+            previousChar = expression[parametersEnd];
+            parametersEnd++;
+          }
+          if (currentParameterStr.find_first_not_of(" ") !=
+              string::npos)  // Add last parameter if needed
+          {
+            parameters.push_back(currentParameterStr);
+          }
+
+          // Testing function call is properly closed
+          if (parametersEnd == expression.length() ||
+              expression[parametersEnd] != U')') {
+            firstErrorStr = _("Paranthesis not closed");
+            firstErrorPos = parametersEnd - 1;
+
+            return false;
+          }
+
+          // Testing the number of parameters
+          if (parameters.size() >
+                  GetMaximalParametersNumber(instructionInfos.parameters) ||
+              parameters.size() <
+                  GetMinimalParametersNumber(instructionInfos.parameters)) {
+            firstErrorPos = functionNameEnd;
+            firstErrorStr = _("Incorrect number of parameters");
+            firstErrorStr += " ";
+            firstErrorStr += _("Expected (maximum) :");
+            firstErrorStr += gd::String::From(
+                GetMaximalParametersNumber(instructionInfos.parameters));
+
+            return false;
+          }
+
+          // Preparing parameters
+          parameters =
+              CompleteParameters(instructionInfos.parameters, parameters);
+          for (std::size_t i = 0; i < instructionInfos.parameters.size(); ++i) {
+            if (!PrepareParameter(platform,
+                                  project,
+                                  layout,
+                                  callbacks,
+                                  parameters[i],
+                                  instructionInfos.parameters[i],
+                                  functionNameEnd))
+              return false;
+          }
+        } else {
+          firstErrorPos = functionNameEnd;
+          firstErrorStr = _("Parameters' parenthesis missing");
+
+          return false;
+        }
+
+        callbacks.OnConstantToken(
+            nonFunctionToken +
+            expression.substr(parsePosition, nameStart - parsePosition));
+        expressionWithoutFunctions +=
+            expression.substr(parsePosition, nameStart - parsePosition);
+        nonFunctionToken.clear();
+        nonFunctionTokenStartPos = gd::String::npos;
+
+        if (objectFunctionFound)
+          callbacks.OnObjectFunction(
+              functionName, parameters, instructionInfos);
+        else if (behaviorFunctionFound)
+          callbacks.OnObjectBehaviorFunction(
+              functionName, parameters, instructionInfos);
+        else if (staticFunctionFound)
+          callbacks.OnStaticFunction(
+              functionName, parameters, instructionInfos);
+
+        if (objectFunctionFound || behaviorFunctionFound || staticFunctionFound)
+          expressionWithoutFunctions += "0";
+
+        parsePosition = parametersEnd + 1;
+        firstPointPos = expression.find(".", parametersEnd + 1);
+        firstParPos = expression.find("(", parametersEnd + 1);
+      } else  // Math function or math constant : Pass it.
+      {
+        nonFunctionToken += expression.substr(
+            parsePosition, functionNameEnd + 1 - parsePosition);
+        expressionWithoutFunctions += expression.substr(
+            parsePosition, functionNameEnd + 1 - parsePosition);
+        nonFunctionTokenStartPos = (nonFunctionTokenStartPos != gd::String::npos
+                                        ? nonFunctionTokenStartPos
+                                        : parsePosition);
+        parsePosition = functionNameEnd + 1;
+        firstPointPos = expression.find(".", functionNameEnd + 1);
+        firstParPos = expression.find("(", functionNameEnd + 1);
+      }
+    } else  // Not a function call : Pass it
+    {
+      nonFunctionToken +=
+          expression.substr(parsePosition, nameEnd + 1 - parsePosition);
+      expressionWithoutFunctions +=
+          expression.substr(parsePosition, nameEnd + 1 - parsePosition);
+      nonFunctionTokenStartPos = (nonFunctionTokenStartPos != gd::String::npos
+                                      ? nonFunctionTokenStartPos
+                                      : parsePosition);
+      parsePosition = nameEnd + 1;
+      firstPointPos = expression.find(".", nameEnd + 1);
+      firstParPos = expression.find("(", nameEnd + 1);
+    }
+  }
+
+  if (parsePosition < expression.length() || !nonFunctionToken.empty())
+    callbacks.OnConstantToken(
+        nonFunctionToken +
+        expression.substr(parsePosition, expression.length()));
+
+  expressionWithoutFunctions +=
+      expression.substr(parsePosition, expression.length());
+
+  return ValidSyntax(expressionWithoutFunctions);
+}
+
+bool ExpressionParser::ParseStringExpression(const gd::Platform& platform,
+                                             const gd::ObjectsContainer& project,
+                                             const gd::ObjectsContainer& layout,
+                                             gd::ParserCallbacks& callbacks) {
+  callbacks.SetReturnType("string");
+  gd::String expression = expressionPlainString;
+
+  size_t parsePosition = 0;
+
+  // Searching for first token.
+  size_t firstPointPos = expression.find(".");
+  size_t firstParPos = expression.find("(");
+  size_t firstQuotePos = expression.find("\"");
+
+  if (firstPointPos == string::npos && firstParPos == string::npos &&
+      firstQuotePos == string::npos) {
+    firstErrorPos = 0;
+    firstErrorStr =
+        _("The expression is invalid or empty. Enter a text ( surrounded by "
+          "quotes ) or a function.");
+
+    return false;
+  }
+
+  while (firstPointPos != string::npos || firstParPos != string::npos ||
+         firstQuotePos != string::npos) {
+    if (firstQuotePos < firstPointPos &&
+        firstQuotePos < firstParPos)  // Adding a constant text
+    {
+      callbacks.OnConstantToken(
+          expression.substr(parsePosition, firstQuotePos - parsePosition));
+
+      // Finding start and end of quotes
+      size_t finalQuotePosition = expression.find("\"", firstQuotePos + 1);
+      while (finalQuotePosition ==
+             expression.find("\\\"", finalQuotePosition - 1) + 1)
+        finalQuotePosition = expression.find("\"", finalQuotePosition + 1);
+
+      if (finalQuotePosition == string::npos) {
+        firstErrorPos = firstQuotePos;
+        firstErrorStr = _("Quotes not closed.");
+
+        return false;
+      }
+
+      // Generating final text, by replacing \" by quotes
+      gd::String finalText = expression.substr(
+          firstQuotePos + 1, finalQuotePosition - (firstQuotePos + 1));
+
+      size_t foundPos = finalText.find("\\\"");
+      while (foundPos != string::npos) {
+        if (foundPos != string::npos) finalText.replace(foundPos, 2, "\"");
+        foundPos = finalText.find("\\\"", foundPos);
+      }
+
+      // Adding constant text instruction
+      //(Function without name is considered as a constant text)
+      vector<gd::Expression> parameters;
+      parameters.push_back(finalText);
+      gd::ExpressionMetadata noParametersInfo;
+
+      callbacks.OnStaticFunction("", parameters, noParametersInfo);
+
+      parsePosition = finalQuotePosition + 1;
+    } else  // Adding a function
+    {
+      // Identify name
+      size_t nameEnd =
+          firstPointPos < firstParPos ? firstPointPos : firstParPos;
+      size_t nameStart = expression.find_last_of(parserSeparators, nameEnd - 1);
+      nameStart++;
+
+      callbacks.OnConstantToken(
+          expression.substr(parsePosition, nameStart - parsePosition));
+
+      gd::String nameBefore = expression.substr(nameStart, nameEnd - nameStart);
+      gd::String objectName = nameBefore.FindAndReplace("~", " ");
+
+      // Identify function name
+      gd::String functionName = nameBefore;
+      size_t functionNameEnd = nameEnd;
+      vector<gd::Expression> parameters;
+
+      bool nameIsFunction = firstPointPos > firstParPos;
+      if (!nameIsFunction) {
+        parameters.push_back(gd::Expression(objectName));
+        functionNameEnd = expression.find_first_of("( ", nameEnd);
+        if (nameEnd + 1 < expression.length())
+          functionName =
+              expression.substr(nameEnd + 1, functionNameEnd - (nameEnd + 1));
+      }
+
+      // Identify parameters
+      size_t parametersEnd = expression.find_first_of("(", functionNameEnd) + 1;
+      char32_t previousChar = U'(';
+      bool takeSymbolsInAccount = true;
+      size_t level = 0;
+      gd::String currentParameterStr;
+      while (parametersEnd < expression.length() &&
+             !(expression[parametersEnd] == U')' && level == 0)) {
+        // Be sure we are not in quotes
+        if (expression[parametersEnd] == U'\"' && previousChar != U'\\')
+          takeSymbolsInAccount = !takeSymbolsInAccount;
+
+        // So as to be sure paranthesis don't belong to a parameter
+        if (expression[parametersEnd] == U'(' && takeSymbolsInAccount) level++;
+        if (expression[parametersEnd] == U')' && takeSymbolsInAccount) level--;
+
+        // Add the character to the current parameter or terminate the latter
+        if ((expression[parametersEnd] == ',' && level == 0) &&
+            takeSymbolsInAccount) {
+          gd::Expression currentParameter(currentParameterStr);
+          parameters.push_back(currentParameter);
+
+          currentParameterStr.clear();
+        } else
+          currentParameterStr += expression[parametersEnd];
+
+        previousChar = expression[parametersEnd];
+        parametersEnd++;
+      }
+
+      if (parametersEnd == expression.length() ||
+          expression[parametersEnd] != U')') {
+        firstErrorPos = parametersEnd - 1;
+        firstErrorStr = _("Paranthesis not closed");
+
+        return false;
+      }
+
+      if (currentParameterStr.find_first_not_of(" ") !=
+          string::npos)  // Add last parameter if needed
+      {
+        gd::Expression lastParameter(currentParameterStr);
+        parameters.push_back(lastParameter);
+      }
+
+      bool functionFound = false;
+
+      // First try to bind to a static str expression
+      if (nameIsFunction &&
+          MetadataProvider::HasStrExpression(platform, functionName)) {
+        functionFound = true;
+        const gd::ExpressionMetadata& expressionInfo =
+            MetadataProvider::GetStrExpressionMetadata(platform, functionName);
+
+        // Testing the number of parameters
+        if (parameters.size() >
+                GetMaximalParametersNumber(expressionInfo.parameters) ||
+            parameters.size() <
+                GetMinimalParametersNumber(expressionInfo.parameters)) {
+          firstErrorPos = functionNameEnd;
+          firstErrorStr = _("Incorrect number of parameters");
+
+          return false;
+        }
+
+        // Preparing parameters
+        parameters = CompleteParameters(expressionInfo.parameters, parameters);
+        for (std::size_t i = 0;
+             i < parameters.size() && i < expressionInfo.parameters.size();
+             ++i) {
+          if (!PrepareParameter(platform,
+                                project,
+                                layout,
+                                callbacks,
+                                parameters[i],
+                                expressionInfo.parameters[i],
+                                functionNameEnd))
+            return false;
+        }
+
+        callbacks.OnStaticFunction(functionName, parameters, expressionInfo);
+      }
+      // Then an object member expression
+      else if (!nameIsFunction &&
+               MetadataProvider::HasObjectStrExpression(
+                   platform,
+                   gd::GetTypeOfObject(project, layout, objectName),
+                   functionName)) {
+        functionFound = true;
+        const gd::ExpressionMetadata& expressionInfo =
+            MetadataProvider::GetObjectStrExpressionMetadata(
+                platform,
+                gd::GetTypeOfObject(project, layout, nameBefore),
+                functionName);
+
+        // Testing the number of parameters
+        if (parameters.size() >
+                GetMaximalParametersNumber(expressionInfo.parameters) ||
+            parameters.size() <
+                GetMinimalParametersNumber(expressionInfo.parameters)) {
+          firstErrorPos = functionNameEnd;
+          firstErrorStr = _("Incorrect number of parameters");
+
+          return false;
+        }
+
+        // Preparing parameters
+        parameters = CompleteParameters(expressionInfo.parameters, parameters);
+        for (std::size_t i = 0;
+             i < parameters.size() && i < expressionInfo.parameters.size();
+             ++i) {
+          if (!PrepareParameter(platform,
+                                project,
+                                layout,
+                                callbacks,
+                                parameters[i],
+                                expressionInfo.parameters[i],
+                                functionNameEnd))
+            return false;
+        }
+
+        callbacks.OnObjectFunction(functionName, parameters, expressionInfo);
+      }
+      // And search behaviors expressions
+      else {
+        size_t firstDoublePoints = functionName.find("::");
+        if (firstDoublePoints != string::npos) {
+          gd::String autoName = functionName.substr(0, firstDoublePoints);
+          if (firstDoublePoints + 2 < functionName.length())
+            functionName = functionName.substr(firstDoublePoints + 2,
+                                               functionName.length());
+          else
+            functionName = "";
+
+          if (MetadataProvider::HasBehaviorStrExpression(
+                  platform,
+                  gd::GetTypeOfBehavior(project, layout, autoName),
+                  functionName)) {
+            parameters.push_back(gd::Expression(autoName));
+            functionFound = true;
+
+            const gd::ExpressionMetadata& expressionInfo =
+                MetadataProvider::GetBehaviorStrExpressionMetadata(
+                    platform,
+                    gd::GetTypeOfBehavior(project, layout, autoName),
+                    functionName);
+
+            // Verify that object has behavior.
+            vector<gd::String> behaviors =
+                gd::GetBehaviorsOfObject(project, layout, objectName);
+            if (find(behaviors.begin(), behaviors.end(), autoName) ==
+                behaviors.end()) {
+              cout << "Bad behavior requested" << endl;
+              functionFound = false;
+            } else {
+              // Testing the number of parameters
+              if (parameters.size() >
+                      GetMaximalParametersNumber(expressionInfo.parameters) ||
+                  parameters.size() <
+                      GetMinimalParametersNumber(expressionInfo.parameters)) {
+                firstErrorPos = functionNameEnd;
+                firstErrorStr = _("Incorrect number of parameters");
+
+                return false;
+              }
+
+              // Preparing parameters
+              parameters =
+                  CompleteParameters(expressionInfo.parameters, parameters);
+              for (std::size_t i = 0; i < parameters.size() &&
+                                      i < expressionInfo.parameters.size();
+                   ++i) {
+                if (!PrepareParameter(platform,
+                                      project,
+                                      layout,
+                                      callbacks,
+                                      parameters[i],
+                                      expressionInfo.parameters[i],
+                                      functionNameEnd))
+                  return false;
+              }
+
+              callbacks.OnObjectBehaviorFunction(
+                  functionName, parameters, expressionInfo);
+            }
+          }
+        }
+      }
+
+      // Note : _No_ support for implicit conversion from math result to string
+
+      if (!functionFound)  // Function was not found
+      {
+        firstErrorPos = nameStart;
+        firstErrorStr = _("Function not recognized.");
+
+        return false;
+      }
+
+      parsePosition = parametersEnd + 1;
+    }
+
+    // Searching for next token
+    size_t firstPlusPos = expression.find("+", parsePosition);
+    firstPointPos = expression.find(".", parsePosition);
+    firstParPos = expression.find("(", parsePosition);
+    firstQuotePos = expression.find("\"", parsePosition);
+
+    // Checking for a + between token
+    if ((firstPointPos != string::npos || firstParPos != string::npos ||
+         firstQuotePos != string::npos)) {
+      size_t nextTokenPos = firstPointPos;
+      if (firstParPos < nextTokenPos) nextTokenPos = firstParPos;
+      if (firstQuotePos < nextTokenPos) nextTokenPos = firstQuotePos;
+
+      if (nextTokenPos < firstPlusPos) {
+        firstErrorPos = nextTokenPos;
+        firstErrorStr = _("Symbol missing between two +.");
+
+        return false;
+      } else if (expression.find("+", firstPlusPos + 1) < nextTokenPos) {
+        firstErrorPos = firstPlusPos;
+        firstErrorStr = _("Symbol missing between two +.");
+
+        return false;
+      }
+    }
+  }
+
+  if (expression.substr(parsePosition, expression.length())
+          .find_first_not_of(" \n") != gd::String::npos) {
+    firstErrorPos = parsePosition;
+    firstErrorStr = _("Bad symbol at the end of the expression.");
+
+    return false;
+  }
+
+  return true;
+}
+
+bool ExpressionParser::PrepareParameter(
+    const gd::Platform& platform,
+    const gd::ObjectsContainer& project,
+    const gd::ObjectsContainer& layout,
+    ParserCallbacks& callbacks,
+    gd::Expression& parameter,
+    const gd::ParameterMetadata& parametersInfo,
+    const size_t positionInExpression) {
+  if (ParameterMetadata::IsExpression("number", parametersInfo.type)) {
+    if (parametersInfo.optional && parameter.GetPlainString().empty())
+      parameter = parametersInfo.GetDefaultValue().empty()
+                      ? gd::Expression("0")
+                      : gd::Expression(parametersInfo.GetDefaultValue());
+
+    if (!callbacks.OnSubMathExpression(platform, project, layout, parameter)) {
+      firstErrorStr = callbacks.firstErrorStr;
+      firstErrorPos = callbacks.firstErrorPos + positionInExpression;
+
+      return false;
+    }
+  } else if (ParameterMetadata::IsExpression("string", parametersInfo.type)) {
+    if (parametersInfo.optional && parameter.GetPlainString().empty())
+      parameter = parametersInfo.GetDefaultValue().empty()
+                      ? gd::Expression("\"\"")
+                      : gd::Expression(parametersInfo.GetDefaultValue());
+
+    if (!callbacks.OnSubTextExpression(platform, project, layout, parameter)) {
+      firstErrorStr = callbacks.firstErrorStr;
+      firstErrorPos = callbacks.firstErrorPos + positionInExpression;
+
+      return false;
+    }
+  }
+
+  return true;
+}
+
+ExpressionParser::ExpressionParser(const gd::String& expressionPlainString_)
+    : expressionPlainString(expressionPlainString_) {}
+
+}  // namespace gd
--- a/Core/GDCore/Events/Parsers/ExpressionParser.h
+++ b/Core/GDCore/Events/Parsers/ExpressionParser.h
@@ -0,0 +1,179 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#ifndef GDCORE_EXPRESSIONPARSER_H
+#define GDCORE_EXPRESSIONPARSER_H
+
+#include <vector>
+#include "GDCore/String.h"
+namespace gd {
+class Expression;
+class ParserCallbacks;
+class ObjectsContainer;
+class Platform;
+class ParameterMetadata;
+class ExpressionMetadata;
+}
+
+namespace gd {
+
+/** \brief Parse an expression
+ *
+ * Parse an expression, calling callbacks when a token is reached
+ * \see gd::ParserCallbacks
+ */
+class GD_CORE_API ExpressionParser {
+ public:
+  ExpressionParser(const gd::String &expressionPlainString_);
+  virtual ~ExpressionParser(){};
+
+  /**
+   * \brief Parse the expression, calling each functor when necessary
+   * \return True if expression was correctly parsed.
+   */
+  bool ParseMathExpression(const gd::Platform &platform,
+                           const gd::ObjectsContainer &project,
+                           const gd::ObjectsContainer &layout,
+                           gd::ParserCallbacks &callbacks);
+
+  /**
+   * \brief Parse the expression, calling each functor when necessary
+   * \return True if expression was correctly parsed.
+   */
+  bool ParseStringExpression(const gd::Platform &platform,
+                             const gd::ObjectsContainer &project,
+                             const gd::ObjectsContainer &layout,
+                             gd::ParserCallbacks &callbacks);
+
+  /**
+   * \brief Return the description of the error that was found
+   */
+  const gd::String &GetFirstError() { return firstErrorStr; }
+
+  /**
+   * \brief Return the position of the error that was found
+   * \return The position, or gd::String::npos if no error is found
+   */
+  size_t GetFirstErrorPosition() { return firstErrorPos; }
+
+ private:
+  gd::String firstErrorStr;
+  size_t firstErrorPos;
+
+  /**
+   * Tool function to add a parameter
+   */
+  bool AddParameterToList(const gd::ObjectsContainer &project,
+                          const gd::ObjectsContainer &layout,
+                          ParserCallbacks &,
+                          std::vector<gd::Expression> &parameters,
+                          gd::String parameterStr,
+                          std::vector<gd::ParameterMetadata> parametersInfos,
+                          const size_t positionInExpression);
+
+  /**
+   * Tool function to prepare a parameter
+   */
+  bool PrepareParameter(const gd::Platform &platform,
+                        const gd::ObjectsContainer &project,
+                        const gd::ObjectsContainer &layout,
+                        ParserCallbacks &,
+                        gd::Expression &parameter,
+                        const gd::ParameterMetadata &parametersInfo,
+                        const size_t positionInExpression);
+
+  /**
+   * Return the minimal number of parameters which can be used when calling an
+   * expression ( i.e. ParametersCount-OptionalParameters-CodeOnlyParameters )
+   */
+  size_t GetMinimalParametersNumber(
+      const std::vector<gd::ParameterMetadata> &parametersInfos);
+
+  /**
+   * Return the maximal number of parameters which can be used when calling an
+   * expression ( i.e. ParametersCount-CodeOnlyParameters )
+   */
+  size_t GetMaximalParametersNumber(
+      const std::vector<gd::ParameterMetadata> &parametersInfos);
+
+  bool ValidSyntax(const gd::String &str);
+
+  gd::String expressionPlainString;
+  static gd::String parserSeparators;
+};
+
+/** \brief Callbacks called by parser during parsing
+ *
+ * Parser will call the appropriate functions during parsing, allowing to do
+ * special works. \see gd::ExpressionParser
+ */
+class GD_CORE_API ParserCallbacks {
+  friend class ExpressionParser;
+
+ public:
+  ParserCallbacks() : returnType("expression"){};
+  virtual ~ParserCallbacks(){};
+
+  /**
+   * \brief Get the type of the expression for which callbacks are used:
+   * "expression" or "string".
+   */
+  const gd::String &GetReturnType() { return returnType; }
+
+  virtual void OnConstantToken(gd::String text) = 0;
+
+  virtual void OnStaticFunction(
+      gd::String functionName,
+      const std::vector<gd::Expression> &parameters,
+      const gd::ExpressionMetadata &expressionInfo) = 0;
+
+  virtual void OnObjectFunction(
+      gd::String functionName,
+      const std::vector<gd::Expression> &parameters,
+      const gd::ExpressionMetadata &expressionInfo) = 0;
+
+  virtual void OnObjectBehaviorFunction(
+      gd::String functionName,
+      const std::vector<gd::Expression> &parameters,
+      const gd::ExpressionMetadata &expressionInfo) = 0;
+
+  virtual bool OnSubMathExpression(const gd::Platform &platform,
+                                   const gd::ObjectsContainer &project,
+                                   const gd::ObjectsContainer &layout,
+                                   gd::Expression &expression) = 0;
+  virtual bool OnSubTextExpression(const gd::Platform &platform,
+                                   const gd::ObjectsContainer &project,
+                                   const gd::ObjectsContainer &layout,
+                                   gd::Expression &expression) = 0;
+
+  /**
+   * \brief Return the description of the error that was found
+   */
+  const gd::String &GetFirstError() { return firstErrorStr; }
+
+  /**
+   * \brief Return the position of the error that was found
+   * \return The position, or gd::String::npos if no error is found
+   */
+  size_t GetFirstErrorPosition() { return firstErrorPos; }
+
+ protected:
+  gd::String firstErrorStr;
+  size_t firstErrorPos;
+
+ private:
+  /**
+   * \brief Set the return type of the expression: Done by ExpressionParser
+   * according to which Parse* method is called. \see gd::ExpressionParser
+   */
+  void SetReturnType(gd::String type) { returnType = type; }
+
+  gd::String returnType;  // The type of the expression ("expression" (default),
+                          // "string"...)
+};
+
+}  // namespace gd
+
+#endif  // GDEXPRESSIONPARSER_H
--- a/Core/GDCore/Events/Parsers/ExpressionParser2.cpp
+++ b/Core/GDCore/Events/Parsers/ExpressionParser2.cpp
@@ -4,11 +4,9 @@
 * reserved. This project is released under the MIT License.
 */
 #include "GDCore/Events/Parsers/ExpressionParser2.h"
-
 #include <algorithm>
 #include <memory>
 #include <vector>
-
 #include "GDCore/CommonTools.h"
 #include "GDCore/Events/Expression.h"
 #include "GDCore/Extensions/Metadata/ExpressionMetadata.h"
@@ -19,29 +17,112 @@
 #include "GDCore/Project/Project.h"
 #include "GDCore/Tools/Localization.h"
 #include "GDCore/Tools/MakeUnique.h"
-#include "GrammarTerminals.h"

 using namespace std;
-using namespace gd::GrammarTerminals;

 namespace gd {

+gd::String ExpressionParser2::NUMBER_FIRST_CHAR = ".0123456789";
+gd::String ExpressionParser2::DOT = ".";
+gd::String ExpressionParser2::PARAMETERS_SEPARATOR = ",";
+gd::String ExpressionParser2::QUOTE = "\"";
+gd::String ExpressionParser2::BRACKETS = "()[]{}";
+gd::String ExpressionParser2::EXPRESSION_OPERATORS = "+-<>?^=\\:!";
+gd::String ExpressionParser2::TERM_OPERATORS = "/*";
+gd::String ExpressionParser2::UNARY_OPERATORS = "+-";
+gd::String ExpressionParser2::WHITESPACES = " \n\r";
 gd::String ExpressionParser2::NAMESPACE_SEPARATOR = "::";

-ExpressionParser2::ExpressionParser2()
+ExpressionParser2::ExpressionParser2(
+    const gd::Platform& platform_,
+    const gd::ObjectsContainer& globalObjectsContainer_,
+    const gd::ObjectsContainer& objectsContainer_)
    : expression(""),
-      currentPosition(0) {}
+      currentPosition(0),
+      platform(platform_),
+      globalObjectsContainer(globalObjectsContainer_),
+      objectsContainer(objectsContainer_) {}
+
+namespace {
+/**
+ * Return the minimum number of parameters, starting from a given parameter
+ * (by convention, 1 for object functions and 2 for behavior functions).
+ */
+size_t GetMinimumParametersNumber(
+    const std::vector<gd::ParameterMetadata>& parameters,
+    size_t initialParameterIndex) {
+  size_t nb = 0;
+  for (std::size_t i = initialParameterIndex; i < parameters.size(); ++i) {
+    if (!parameters[i].optional && !parameters[i].codeOnly) nb++;
+  }
+
+  return nb;
+}
+
+/**
+ * Return the maximum number of parameters, starting from a given parameter
+ * (by convention, 1 for object functions and 2 for behavior functions).
+ */
+size_t GetMaximumParametersNumber(
+    const std::vector<gd::ParameterMetadata>& parameters,
+    size_t initialParameterIndex) {
+  size_t nb = 0;
+  for (std::size_t i = initialParameterIndex; i < parameters.size(); ++i) {
+    if (!parameters[i].codeOnly) nb++;
+  }
+
+  return nb;
+}
+}  // namespace
+
+std::unique_ptr<ExpressionParserDiagnostic> ExpressionParser2::ValidateFunction(
+    const gd::FunctionNode& function, size_t functionStartPosition) {
+  if (gd::MetadataProvider::IsBadExpressionMetadata(
+          function.expressionMetadata)) {
+    return gd::make_unique<ExpressionParserError>(
+        "invalid_function_name",
+        _("Cannot find an expression with this name: ") +
+            function.functionName + "\n" +
+            _("Double check that you've not made any typo in the name."),
+        functionStartPosition,
+        GetCurrentPosition());
+  }
+
+  size_t minParametersCount = GetMinimumParametersNumber(
+      function.expressionMetadata.parameters,
+      WrittenParametersFirstIndex(function.objectName, function.behaviorName));
+  size_t maxParametersCount = GetMaximumParametersNumber(
+      function.expressionMetadata.parameters,
+      WrittenParametersFirstIndex(function.objectName, function.behaviorName));
+  if (function.parameters.size() < minParametersCount ||
+      function.parameters.size() > maxParametersCount) {
+    gd::String expectedCountMessage =
+        minParametersCount == maxParametersCount
+            ? _("The number of parameters must be exactly ") +
+                  gd::String::From(minParametersCount)
+            : _("The number of parameters must be: ") +
+                  gd::String::From(minParametersCount) + "-" +
+                  gd::String::From(maxParametersCount);
+
+    if (function.parameters.size() < minParametersCount) {
+      return gd::make_unique<ExpressionParserError>(
+          "too_few_parameters",
+          "You have not entered enough parameters for the expression. " +
+              expectedCountMessage,
+          functionStartPosition,
+          GetCurrentPosition());
+    }
+  }
+
+  return gd::make_unique<ExpressionParserDiagnostic>();
+}

 std::unique_ptr<TextNode> ExpressionParser2::ReadText() {
-  size_t textStartPosition = GetCurrentPosition();
-  SkipAllWhitespaces();
-  if (!CheckIfChar(IsQuote)) {
+  SkipWhitespace();
+  if (!IsAnyChar("\"")) {
    auto text = gd::make_unique<TextNode>("");
-	  // It can't happen.
    text->diagnostic =
        RaiseSyntaxError(_("A text must start with a double quote (\")."));
-    text->location =
-        ExpressionParserLocation(textStartPosition, GetCurrentPosition());
    return text;
  }
  SkipChar();
@@ -76,8 +157,6 @@ std::unique_ptr<TextNode> ExpressionParser2::ReadText() {
  }

  auto text = gd::make_unique<TextNode>(parsedText);
-  text->location =
-      ExpressionParserLocation(textStartPosition, GetCurrentPosition());
  if (!textParsingHasEnded) {
    text->diagnostic =
        RaiseSyntaxError(_("A text must end with a double quote (\"). Add a "
@@ -88,30 +167,28 @@ std::unique_ptr<TextNode> ExpressionParser2::ReadText() {
 }

 std::unique_ptr<NumberNode> ExpressionParser2::ReadNumber() {
-  size_t numberStartPosition = GetCurrentPosition();
-  SkipAllWhitespaces();
+  SkipWhitespace();
  gd::String parsedNumber;

  bool numberHasStarted = false;
  bool digitFound = false;
  bool dotFound = false;
  while (!IsEndReached()) {
-    if (CheckIfChar(IsZeroDigit)) {
+    if (IsAnyChar("0")) {
      numberHasStarted = true;
      digitFound = true;
-      if (!parsedNumber.empty()) {  // Ignore leading 0s.
+      if (!parsedNumber.empty()) { // Ignore leading 0s.
        parsedNumber += GetCurrentChar();
      }
-    } else if (CheckIfChar(IsNonZeroDigit)) {
+    } else if (IsAnyChar("123456789")) {
      numberHasStarted = true;
      digitFound = true;
      parsedNumber += GetCurrentChar();
-    } else if (CheckIfChar(IsDot) && !dotFound) {
+    } else if (IsAnyChar(".") && !dotFound) {
      numberHasStarted = true;
      dotFound = true;
      if (parsedNumber == "") {
-        parsedNumber +=
-            "0.";  // Normalize by adding a leading 0, only in this case.
+        parsedNumber += "0."; //Normalize by adding a leading 0, only in this case.
      } else {
        parsedNumber += ".";
      }
@@ -132,8 +209,6 @@ std::unique_ptr<NumberNode> ExpressionParser2::ReadNumber() {
  // valid in most languages so we allow this.

  auto number = gd::make_unique<NumberNode>(parsedNumber);
-  number->location =
-      ExpressionParserLocation(numberStartPosition, GetCurrentPosition());
  if (!numberHasStarted || !digitFound) {
    number->diagnostic = RaiseSyntaxError(
        _("A number was expected. You must enter a number here."));
--- a/Core/GDCore/Events/Parsers/ExpressionParser2.h
+++ b/Core/GDCore/Events/Parsers/ExpressionParser2.h
--- a/Core/GDCore/Events/Parsers/ExpressionParser2Node.h
+++ b/Core/GDCore/Events/Parsers/ExpressionParser2Node.h
@@ -8,7 +8,6 @@

 #include <memory>
 #include <vector>
-
 #include "ExpressionParser2NodeWorker.h"
 #include "GDCore/String.h"
 namespace gd {
@@ -17,34 +16,14 @@ class ObjectsContainer;
 class Platform;
 class ParameterMetadata;
 class ExpressionMetadata;
-struct FunctionCallNode;
 }  // namespace gd

 namespace gd {

-struct GD_CORE_API ExpressionParserLocation {
-  ExpressionParserLocation() : isValid(false){};
-  ExpressionParserLocation(size_t position)
-      : isValid(true), startPosition(position), endPosition(position){};
-  ExpressionParserLocation(size_t startPosition_, size_t endPosition_)
-      : isValid(true),
-        startPosition(startPosition_),
-        endPosition(endPosition_){};
-  size_t GetStartPosition() const { return startPosition; }
-  size_t GetEndPosition() const { return endPosition; }
-  bool IsValid() const { return isValid; }
-
- private:
-  bool isValid;
-  size_t startPosition;
-  size_t endPosition;
-};
-
 /**
 * \brief A diagnostic that can be attached to a gd::ExpressionNode.
 */
-struct GD_CORE_API ExpressionParserDiagnostic {
-  virtual ~ExpressionParserDiagnostic() = default;
+struct ExpressionParserDiagnostic {
  virtual bool IsError() { return false; }
  virtual const gd::String &GetMessage() { return noMessage; }
  virtual size_t GetStartPosition() { return 0; }
@@ -57,57 +36,50 @@ struct GD_CORE_API ExpressionParserDiagnostic {
 /**
 * \brief An error that can be attached to a gd::ExpressionNode.
 */
-struct GD_CORE_API ExpressionParserError : public ExpressionParserDiagnostic {
-  ExpressionParserError(const gd::String &type_,
-                        const gd::String &message_,
-                        const ExpressionParserLocation &location_)
-      : type(type_), message(message_), location(location_){};
+struct ExpressionParserError : public ExpressionParserDiagnostic {
  ExpressionParserError(const gd::String &type_,
                        const gd::String &message_,
                        size_t position_)
-      : type(type_), message(message_), location(position_){};
+      : type(type_),
+        message(message_),
+        startPosition(position_),
+        endPosition(position_){};
  ExpressionParserError(const gd::String &type_,
                        const gd::String &message_,
                        size_t startPosition_,
                        size_t endPosition_)
      : type(type_),
        message(message_),
-        location(startPosition_, endPosition_){};
+        startPosition(startPosition_),
+        endPosition(endPosition_){};
  virtual ~ExpressionParserError(){};

  bool IsError() override { return true; }
  const gd::String &GetMessage() override { return message; }
-  size_t GetStartPosition() override { return location.GetStartPosition(); }
-  size_t GetEndPosition() override { return location.GetEndPosition(); }
+  size_t GetStartPosition() override { return startPosition; }
+  size_t GetEndPosition() override { return endPosition; }

 private:
  gd::String type;
  gd::String message;
-  ExpressionParserLocation location;
+  size_t startPosition;
+  size_t endPosition;
 };

 /**
 * \brief The base node, from which all nodes in the tree of
 * an expression inherits from.
 */
-struct GD_CORE_API ExpressionNode {
-  ExpressionNode() : parent(nullptr) {};
+struct ExpressionNode {
  virtual ~ExpressionNode(){};
  virtual void Visit(ExpressionParser2NodeWorker &worker){};

  std::unique_ptr<ExpressionParserDiagnostic> diagnostic;
-  ExpressionParserLocation location;  ///< The location of the entire node. Some
-                                      /// nodes might have other locations
-                                      /// stored inside them. For example, a
-                                      /// function can store the position of the
-                                      /// object name, the dot, the function
-                                      /// name, etc...
-  ExpressionNode *parent;
 };

-struct GD_CORE_API SubExpressionNode : public ExpressionNode {
+struct SubExpressionNode : public ExpressionNode {
  SubExpressionNode(std::unique_ptr<ExpressionNode> expression_)
-      : ExpressionNode(), expression(std::move(expression_)){};
+      : expression(std::move(expression_)){};
  virtual ~SubExpressionNode(){};
  virtual void Visit(ExpressionParser2NodeWorker &worker) {
    worker.OnVisitSubExpressionNode(*this);
@@ -119,9 +91,7 @@ struct GD_CORE_API SubExpressionNode : public ExpressionNode {
 /**
 * \brief An operator node. For example: "lhs + rhs".
 */
-struct GD_CORE_API OperatorNode : public ExpressionNode {
-  OperatorNode(gd::String::value_type op_)
-      : ExpressionNode(), op(op_){};
+struct OperatorNode : public ExpressionNode {
  virtual ~OperatorNode(){};
  virtual void Visit(ExpressionParser2NodeWorker &worker) {
    worker.OnVisitOperatorNode(*this);
@@ -135,9 +105,8 @@ struct GD_CORE_API OperatorNode : public ExpressionNode {
 /**
 * \brief A unary operator node. For example: "-2".
 */
-struct GD_CORE_API UnaryOperatorNode : public ExpressionNode {
-  UnaryOperatorNode(gd::String::value_type op_)
-      : ExpressionNode(), op(op_){};
+struct UnaryOperatorNode : public ExpressionNode {
+  UnaryOperatorNode(gd::String::value_type op_) : op(op_){};
  virtual ~UnaryOperatorNode(){};
  virtual void Visit(ExpressionParser2NodeWorker &worker) {
    worker.OnVisitUnaryOperatorNode(*this);
@@ -149,26 +118,22 @@ struct GD_CORE_API UnaryOperatorNode : public ExpressionNode {

 /**
 * \brief A number node. For example: "123".
- * Its `type` is always "number".
 */
-struct GD_CORE_API NumberNode : public ExpressionNode {
-  NumberNode(const gd::String &number_)
-      : ExpressionNode(), number(number_){};
+struct NumberNode : public ExpressionNode {
+  NumberNode(const gd::String &number_) : number(number_){};
  virtual ~NumberNode(){};
  virtual void Visit(ExpressionParser2NodeWorker &worker) {
    worker.OnVisitNumberNode(*this);
  };

-  //
  gd::String number;
 };

 /**
 * \brief A text node. For example: "Hello World".
- * Its `type` is always "string".
 */
-struct GD_CORE_API TextNode : public ExpressionNode {
-  TextNode(const gd::String &text_) : ExpressionNode(), text(text_){};
+struct TextNode : public ExpressionNode {
+  TextNode(const gd::String &text_) : text(text_){};
  virtual ~TextNode(){};
  virtual void Visit(ExpressionParser2NodeWorker &worker) {
    worker.OnVisitTextNode(*this);
@@ -177,122 +142,59 @@ struct GD_CORE_API TextNode : public ExpressionNode {
  gd::String text;
 };

-struct GD_CORE_API IdentifierOrFunctionCallOrObjectFunctionNameOrEmptyNode
-    : public ExpressionNode {
-  IdentifierOrFunctionCallOrObjectFunctionNameOrEmptyNode()
-      : ExpressionNode(){};
-};
-
-/**
- * \brief An identifier node, usually representing an object or a variable
- * with an optional function name or child variable name respectively.
- *
- * The name of a function to call on an object or the behavior,
- * for example: "MyObject.Function" or "MyObject.Physics".
- *
- * A variable, potentially with accessor to its child,
- * for example: MyVariable or MyVariable.MyChild
- */
-struct GD_CORE_API IdentifierNode
-    : public IdentifierOrFunctionCallOrObjectFunctionNameOrEmptyNode {
-  IdentifierNode(
-  const gd::String &identifierName_)
-      : IdentifierOrFunctionCallOrObjectFunctionNameOrEmptyNode(),
-        identifierName(identifierName_),
-        childIdentifierName(""){};
-  IdentifierNode(
-  const gd::String &identifierName_,
-  const gd::String &childIdentifierName_)
-      : IdentifierOrFunctionCallOrObjectFunctionNameOrEmptyNode(),
-        identifierName(identifierName_),
-        childIdentifierName(childIdentifierName_){};
-  virtual ~IdentifierNode(){};
-  virtual void Visit(ExpressionParser2NodeWorker &worker) {
-    worker.OnVisitIdentifierNode(*this);
-  };
-
-  gd::String identifierName;  ///< The object or variable name.
-  gd::String childIdentifierName;  ///< The object function or variable child name.
-
-
-  ExpressionParserLocation
-      identifierNameLocation;  ///< Location of the object or variable name.
-  ExpressionParserLocation
-      identifierNameDotLocation;  ///< Location of the "." after the object or variable name.
-  ExpressionParserLocation childIdentifierNameLocation;  ///< Location of object
-                                                         /// function, behavior or
-                                                         /// child variable name.
-};
-
-struct GD_CORE_API FunctionCallOrObjectFunctionNameOrEmptyNode
-    : public IdentifierOrFunctionCallOrObjectFunctionNameOrEmptyNode {
-  FunctionCallOrObjectFunctionNameOrEmptyNode()
-      : IdentifierOrFunctionCallOrObjectFunctionNameOrEmptyNode(){};
-  virtual ~FunctionCallOrObjectFunctionNameOrEmptyNode(){};
-  void Visit(ExpressionParser2NodeWorker &worker) override{};
-};
-
-struct GD_CORE_API VariableAccessorOrVariableBracketAccessorNode : public ExpressionNode {
-  VariableAccessorOrVariableBracketAccessorNode() : ExpressionNode(){};
-
+struct VariableAccessorOrVariableBracketAccessorNode : public ExpressionNode {
  std::unique_ptr<VariableAccessorOrVariableBracketAccessorNode> child;
 };

 /**
- * \brief A variable, or object variable, with bracket accessor or at least 2 "dot" accessors.
+ * \brief A variable, potentially with accessor to its children.
 *
- * Example: `MyVariable["MyChildren"]` or `MyVariable.MyChildren.MyGrandChildren`.
- * Example: `MyObject["MyVariable"]` or `MyObject.MyVariable.MyChildren`.
+ * Example: MyVariable or MyVariable.MyChildren
 *
- * Other cases like "MyVariable" or "MyVariable.MyChildren" are IdentifierNode
- * to allow handling ambiguities.
- *
- * \see gd::IdentifierNode
 * \see gd::VariableAccessorNode
 * \see gd::VariableBracketAccessorNode
 */
-struct GD_CORE_API VariableNode : public FunctionCallOrObjectFunctionNameOrEmptyNode {
-  VariableNode(const gd::String &name_)
-      : FunctionCallOrObjectFunctionNameOrEmptyNode(), name(name_){};
+struct VariableNode : public ExpressionNode {
+  VariableNode(const gd::String &type_,
+               const gd::String &name_,
+               const gd::String &objectName_)
+      : type(type_), name(name_), objectName(objectName_){};
  virtual ~VariableNode(){};
  virtual void Visit(ExpressionParser2NodeWorker &worker) {
    worker.OnVisitVariableNode(*this);
  };

+  gd::String type;
  gd::String name;
+  gd::String objectName;

  std::unique_ptr<VariableAccessorOrVariableBracketAccessorNode>
      child;  // Can be nullptr if no accessor
-
-  ExpressionParserLocation nameLocation;
 };

 /**
- * \brief A direct accessor to a child variable. Example: MyChild
+ * \brief A bracket accessor of a variable. Example: MyChild
 * in MyVariable.MyChild
 */
-struct GD_CORE_API VariableAccessorNode
+struct VariableAccessorNode
    : public VariableAccessorOrVariableBracketAccessorNode {
-  VariableAccessorNode(const gd::String &name_)
-      : VariableAccessorOrVariableBracketAccessorNode(), name(name_){};
+  VariableAccessorNode(const gd::String &name_) : name(name_){};
  virtual ~VariableAccessorNode(){};
  virtual void Visit(ExpressionParser2NodeWorker &worker) {
    worker.OnVisitVariableAccessorNode(*this);
  };

  gd::String name;
-  ExpressionParserLocation nameLocation;
-  ExpressionParserLocation dotLocation;
 };

 /**
- * \brief A bracket accessor to a child variable. Example: ["MyChild"]
+ * \brief A bracket accessor of a variable. Example: ["MyChild"]
 * (in MyVariable["MyChild"]).
 */
-struct GD_CORE_API VariableBracketAccessorNode
+struct VariableBracketAccessorNode
    : public VariableAccessorOrVariableBracketAccessorNode {
  VariableBracketAccessorNode(std::unique_ptr<ExpressionNode> expression_)
-      : VariableAccessorOrVariableBracketAccessorNode(), expression(std::move(expression_)){};
+      : expression(std::move(expression_)){};
  virtual ~VariableBracketAccessorNode(){};
  virtual void Visit(ExpressionParser2NodeWorker &worker) {
    worker.OnVisitVariableBracketAccessorNode(*this);
@@ -301,129 +203,92 @@ struct GD_CORE_API VariableBracketAccessorNode
  std::unique_ptr<ExpressionNode> expression;
 };

+struct IdentifierOrFunctionOrEmptyNode : public ExpressionNode {};
+
 /**
- * \brief The name of a function to call on an object or the behavior
- * For example: "MyObject.Physics::LinearVelocity".
- *
- * Other cases like "MyObject.Function" or "MyObject.Physics" are IdentifierNode
- * to allow handling ambiguities.
- *
- * \see gd::IdentifierNode
+ * \brief An identifier node, usually representing an object.
 */
-struct GD_CORE_API ObjectFunctionNameNode
-    : public FunctionCallOrObjectFunctionNameOrEmptyNode {
-  ObjectFunctionNameNode(const gd::String &objectName_,
-                         const gd::String &objectFunctionOrBehaviorName_)
-      : FunctionCallOrObjectFunctionNameOrEmptyNode(),
-        objectName(objectName_),
-        objectFunctionOrBehaviorName(objectFunctionOrBehaviorName_) {}
-  ObjectFunctionNameNode(const gd::String &objectName_,
-                         const gd::String &behaviorName_,
-                         const gd::String &behaviorFunctionName_)
-      : FunctionCallOrObjectFunctionNameOrEmptyNode(),
-        objectName(objectName_),
-        objectFunctionOrBehaviorName(behaviorName_),
-        behaviorFunctionName(behaviorFunctionName_) {}
-  virtual ~ObjectFunctionNameNode(){};
+struct IdentifierNode : public IdentifierOrFunctionOrEmptyNode {
+  IdentifierNode(const gd::String &identifierName_, const gd::String &type_)
+      : identifierName(identifierName_), type(type_){};
+  virtual ~IdentifierNode(){};
  virtual void Visit(ExpressionParser2NodeWorker &worker) {
-    worker.OnVisitObjectFunctionNameNode(*this);
+    worker.OnVisitIdentifierNode(*this);
  };

-  gd::String objectName;
-  gd::String objectFunctionOrBehaviorName;  ///< Behavior name if
-                                            ///`behaviorFunctionName` is not
-                                            /// empty.
-  gd::String behaviorFunctionName;          ///< If empty, then
-                                    /// objectFunctionOrBehaviorName is filled
-                                    /// with the behavior name.
+  gd::String identifierName;
+  gd::String type;
+};

-  ExpressionParserLocation
-      objectNameLocation;  ///< Location of the object name.
-  ExpressionParserLocation
-      objectNameDotLocation;  ///< Location of the "." after the object name.
-  ExpressionParserLocation objectFunctionOrBehaviorNameLocation;  ///< Location
-                                                                  /// of object
-                                                                  /// function
-                                                                  /// name or
-                                                                  /// behavior
-                                                                  /// name.
-  ExpressionParserLocation
-      behaviorNameNamespaceSeparatorLocation;  ///< Location of the "::"
-                                               /// separator, if any.
-  ExpressionParserLocation behaviorFunctionNameLocation;  ///< Location of the
-                                                          /// behavior function
-                                                          /// name, if any.
+struct FunctionOrEmptyNode : public IdentifierOrFunctionOrEmptyNode {
+  virtual ~FunctionOrEmptyNode(){};
+  void Visit(ExpressionParser2NodeWorker &worker) override{};
 };

 /**
- * \brief A function call node (either free function, object function or object
- * behavior function).
- * For example: "MyExtension::MyFunction(1, 2)", "MyObject.Function()" or
- * "MyObject.Physics::LinearVelocity()".
+ * \brief A function node. For example: "MyExtension::MyFunction(1, 2)".
 */
-struct GD_CORE_API FunctionCallNode : public FunctionCallOrObjectFunctionNameOrEmptyNode {
-  /** \brief Construct a free function call node. */
-  FunctionCallNode(const gd::String &functionName_)
-      : FunctionCallOrObjectFunctionNameOrEmptyNode(),
+struct FunctionNode : public FunctionOrEmptyNode {
+  FunctionNode(const gd::String &type_,
+               std::vector<std::unique_ptr<ExpressionNode>> parameters_,
+               const ExpressionMetadata &expressionMetadata_,
+               const gd::String &functionName_)
+      : type(type_),
+        parameters(std::move(parameters_)),
+        expressionMetadata(expressionMetadata_),
        functionName(functionName_){};
-
-  /** \brief Construct an object function call node. */
-  FunctionCallNode(const gd::String &objectName_,
-                   const gd::String &functionName_)
-      : FunctionCallOrObjectFunctionNameOrEmptyNode(),
+  FunctionNode(const gd::String &type_,
+               const gd::String &objectName_,
+               std::vector<std::unique_ptr<ExpressionNode>> parameters_,
+               const ExpressionMetadata &expressionMetadata_,
+               const gd::String &functionName_)
+      : type(type_),
        objectName(objectName_),
+        parameters(std::move(parameters_)),
+        expressionMetadata(expressionMetadata_),
        functionName(functionName_){};
-
-  /** \brief Construct a behavior function call node. */
-  FunctionCallNode(const gd::String &objectName_,
-                   const gd::String &behaviorName_,
-                   const gd::String &functionName_)
-      : FunctionCallOrObjectFunctionNameOrEmptyNode(),
+  FunctionNode(const gd::String &type_,
+               const gd::String &objectName_,
+               const gd::String &behaviorName_,
+               std::vector<std::unique_ptr<ExpressionNode>> parameters_,
+               const ExpressionMetadata &expressionMetadata_,
+               const gd::String &functionName_)
+      : type(type_),
        objectName(objectName_),
        behaviorName(behaviorName_),
+        parameters(std::move(parameters_)),
+        expressionMetadata(expressionMetadata_),
        functionName(functionName_){};
-  virtual ~FunctionCallNode(){};
+  virtual ~FunctionNode(){};
  virtual void Visit(ExpressionParser2NodeWorker &worker) {
-    worker.OnVisitFunctionCallNode(*this);
+    worker.OnVisitFunctionNode(*this);
  };

+  gd::String type;  // This could be removed if the type ("string" or "number")
+                    // was stored in ExpressionMetadata.
  gd::String objectName;
  gd::String behaviorName;
  std::vector<std::unique_ptr<ExpressionNode>> parameters;
+  const ExpressionMetadata &expressionMetadata;
  gd::String functionName;
-
-  ExpressionParserLocation
-      functionNameLocation;  ///< Location of the function name.
-  ExpressionParserLocation
-      objectNameLocation;  ///< Location of the object name, if any.
-  ExpressionParserLocation
-      objectNameDotLocation;  ///< Location of the "." after the object name.
-  ExpressionParserLocation
-      behaviorNameLocation;  ///< Location of the behavior name, if any.
-  ExpressionParserLocation
-      behaviorNameNamespaceSeparatorLocation;  ///< Location of the "::"
-                                               /// separator, if any.
-  ExpressionParserLocation
-      openingParenthesisLocation;  ///< Location of the "(".
-  ExpressionParserLocation
-      closingParenthesisLocation;  ///< Location of the ")".
 };

 /**
 * \brief An empty node, used when parsing failed/a syntax error was
 * encountered and any other node could not make sense.
 */
-struct GD_CORE_API EmptyNode : public FunctionCallOrObjectFunctionNameOrEmptyNode {
-  EmptyNode(const gd::String &text_ = "")
-      : FunctionCallOrObjectFunctionNameOrEmptyNode(), text(text_){};
+struct EmptyNode : public FunctionOrEmptyNode {
+  EmptyNode(const gd::String &type_, const gd::String &text_ = "")
+      : type(type_), text(text_){};
  virtual ~EmptyNode(){};
  virtual void Visit(ExpressionParser2NodeWorker &worker) {
    worker.OnVisitEmptyNode(*this);
  };

+  gd::String type;
  gd::String text;
 };

 }  // namespace gd

-#endif
+#endif
--- a/Core/GDCore/Events/Parsers/ExpressionParser2NodePrinter.h
+++ b/Core/GDCore/Events/Parsers/ExpressionParser2NodePrinter.h
@@ -91,19 +91,8 @@ class GD_CORE_API ExpressionParser2NodePrinter
  }
  void OnVisitIdentifierNode(IdentifierNode& node) override {
    output += node.identifierName;
-    if (!node.childIdentifierName.empty()) {
-      output += "." + node.childIdentifierName;
-    }
  }
-  void OnVisitObjectFunctionNameNode(ObjectFunctionNameNode& node) override {
-    if (!node.behaviorFunctionName.empty()) {
-      output +=
-          node.objectName + "." + node.objectFunctionOrBehaviorName + "::" + node.behaviorFunctionName;
-    } else {
-      output += node.objectName + "." + node.objectFunctionOrBehaviorName;
-    }
-  };
-  void OnVisitFunctionCallNode(FunctionCallNode& node) override {
+  void OnVisitFunctionNode(FunctionNode& node) override {
    if (!node.behaviorName.empty()) {
      output +=
          node.objectName + "." + node.behaviorName + "::" + node.functionName;
--- a/Core/GDCore/Events/Parsers/ExpressionParser2NodeWorker.h
+++ b/Core/GDCore/Events/Parsers/ExpressionParser2NodeWorker.h
@@ -7,21 +7,20 @@
 #define GDCORE_EXPRESSIONPARSER2NODEWORKER_H

 namespace gd {
-struct ExpressionNode;
-struct SubExpressionNode;
-struct OperatorNode;
-struct UnaryOperatorNode;
-struct NumberNode;
-struct TextNode;
-struct VariableNode;
-struct VariableAccessorNode;
-struct VariableBracketAccessorNode;
-struct IdentifierOrFunctionCallOrObjectFunctionNameOrEmptyNode;
-struct IdentifierNode;
-struct FunctionCallOrObjectFunctionNameOrEmptyNode;
-struct ObjectFunctionNameNode;
-struct FunctionCallNode;
-struct EmptyNode;
+class ExpressionNode;
+class SubExpressionNode;
+class OperatorNode;
+class UnaryOperatorNode;
+class NumberNode;
+class TextNode;
+class VariableNode;
+class VariableAccessorNode;
+class VariableBracketAccessorNode;
+class IdentifierOrFunctionOrEmptyNode;
+class IdentifierNode;
+class FunctionOrEmptyNode;
+class FunctionNode;
+class EmptyNode;
 }  // namespace gd

 namespace gd {
@@ -34,21 +33,20 @@ namespace gd {
 * \see gd::ExpressionNode
 */
 class GD_CORE_API ExpressionParser2NodeWorker {
-  friend struct ExpressionNode;
-  friend struct SubExpressionNode;
-  friend struct OperatorNode;
-  friend struct UnaryOperatorNode;
-  friend struct NumberNode;
-  friend struct TextNode;
-  friend struct VariableNode;
-  friend struct VariableAccessorNode;
-  friend struct VariableBracketAccessorNode;
-  friend struct IdentifierOrFunctionCallOrObjectFunctionNameOrEmptyNode;
-  friend struct IdentifierNode;
-  friend struct FunctionCallOrObjectFunctionNameOrEmptyNode;
-  friend struct ObjectFunctionNameNode;
-  friend struct FunctionCallNode;
-  friend struct EmptyNode;
+  friend class ExpressionNode;
+  friend class SubExpressionNode;
+  friend class OperatorNode;
+  friend class UnaryOperatorNode;
+  friend class NumberNode;
+  friend class TextNode;
+  friend class VariableNode;
+  friend class VariableAccessorNode;
+  friend class VariableBracketAccessorNode;
+  friend class IdentifierOrFunctionOrEmptyNode;
+  friend class IdentifierNode;
+  friend class FunctionOrEmptyNode;
+  friend class FunctionNode;
+  friend class EmptyNode;

 public:
  virtual ~ExpressionParser2NodeWorker();
@@ -64,11 +62,10 @@ class GD_CORE_API ExpressionParser2NodeWorker {
  virtual void OnVisitVariableBracketAccessorNode(
      VariableBracketAccessorNode& node) = 0;
  virtual void OnVisitIdentifierNode(IdentifierNode& node) = 0;
-  virtual void OnVisitObjectFunctionNameNode(ObjectFunctionNameNode& node) = 0;
-  virtual void OnVisitFunctionCallNode(FunctionCallNode& node) = 0;
+  virtual void OnVisitFunctionNode(FunctionNode& node) = 0;
  virtual void OnVisitEmptyNode(EmptyNode& node) = 0;
 };

 }  // namespace gd

-#endif
+#endif
--- a/Core/GDCore/Events/Parsers/GrammarTerminals.h
+++ b/Core/GDCore/Events/Parsers/GrammarTerminals.h
@@ -1,118 +0,0 @@
-#pragma once
-#include "GDCore/String.h"
-
-namespace gd {
-
-/**
- * Contains functions to handle the grammar of the expressions accepted by GDevelop.
- */
-namespace GrammarTerminals {
-
-inline bool IsWhitespace(gd::String::value_type character) {
-  return character == ' ' || character == '\n' || character == '\r';
-}
-
-inline bool IsParameterSeparator(gd::String::value_type character) {
-  return character == ',';
-}
-
-inline bool IsDot(gd::String::value_type character) { return character == '.'; }
-
-inline bool IsQuote(gd::String::value_type character) {
-  return character == '"';
-}
-
-inline bool IsBracket(gd::String::value_type character) {
-  return character == '(' || character == ')' || character == '[' ||
-         character == ']' || character == '{' || character == '}';
-}
-
-inline bool IsOpeningParenthesis(gd::String::value_type character) {
-  return character == '(';
-}
-
-inline bool IsClosingParenthesis(gd::String::value_type character) {
-  return character == ')';
-}
-
-inline bool IsOpeningSquareBracket(gd::String::value_type character) {
-  return character == '[';
-}
-
-inline bool IsClosingSquareBracket(gd::String::value_type character) {
-  return character == ']';
-}
-
-inline bool IsExpressionEndingChar(gd::String::value_type character) {
-  return character == ',' || IsClosingParenthesis(character) ||
-         IsClosingSquareBracket(character);
-}
-
-inline bool IsExpressionOperator(gd::String::value_type character) {
-  return character == '+' || character == '-' || character == '<' ||
-         character == '>' || character == '?' || character == '^' ||
-         character == '=' || character == '\\' || character == ':' ||
-         character == '!';
-}
-
-inline bool IsUnaryOperator(gd::String::value_type character) {
-  return character == '+' || character == '-';
-}
-
-inline bool IsTermOperator(gd::String::value_type character) {
-  return character == '/' || character == '*';
-}
-
-inline bool IsNumberFirstChar(gd::String::value_type character) {
-  return character == '.' || (character >= '0' && character <= '9');
-}
-
-inline bool IsNonZeroDigit(gd::String::value_type character) {
-  return (character >= '1' && character <= '9');
-}
-
-inline bool IsZeroDigit(gd::String::value_type character) {
-  return character == '0';
-}
-
-inline bool IsAdditionalReservedCharacter(gd::String::value_type character) {
-  // These characters are not part of the grammar - but are often used in programming language
-  // and could become operators or part of the grammar one day.
-  return character == '~' || character == '\'' || character == '%' ||
-         character == '#' || character == '@' || character == '|' ||
-         character == '&' || character == '`' || character == '$' ||
-         character == ';';
-
-}
-
-/**
- * Check if the given character can be used in an identifier. This is
- * any unicode character, except for:
- * `, . " () [] {} + - < > ? ^ = \ : ! / * ~ ' % # @ | & $ ;`
- * and backtick and whitespaces (space, line break, carriage return).
- *
- * This is loosely based on what is allowed in languages like JavaScript
- * (see https://mathiasbynens.be/notes/javascript-properties), without support
- * for unicode escape syntax, and allowing all unicode ranges. The only
- * disallowed characters are the one used for the grammar.
- */
-inline bool IsAllowedInIdentifier(gd::String::value_type character) {
-  // Quickly compare if the character is a number or ASCII character.
-  if ((character >= '0' && character <= '9') ||
-      (character >= 'A' && character <= 'Z') ||
-      (character >= 'a' && character <= 'z'))
-    return true;
-
-  // Otherwise do the full check against separators forbidden in identifiers.
-  if (!IsParameterSeparator(character) && !IsDot(character) &&
-      !IsQuote(character) && !IsBracket(character) &&
-      !IsExpressionOperator(character) && !IsTermOperator(character) &&
-      !IsWhitespace(character) && !IsAdditionalReservedCharacter(character)) {
-    return true;
-  }
-
-  return false;
-}
-
-}  // namespace GrammarTerminals
-}  // namespace gd
--- a/Core/GDCore/Events/Parsers/VariableParser.cpp
+++ b/Core/GDCore/Events/Parsers/VariableParser.cpp
@@ -0,0 +1,141 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#include "GDCore/Events/Parsers/VariableParser.h"
+#include <vector>
+#include "GDCore/String.h"
+namespace gd {
+class Layout;
+}
+namespace gd {
+class Project;
+}
+namespace gd {
+class Platform;
+}
+#include "GDCore/Tools/Localization.h"
+
+namespace gd {
+
+VariableParser::~VariableParser() {}
+
+bool VariableParser::Parse(VariableParserCallbacks& callbacks_) {
+  callbacks = &callbacks_;
+  rootVariableParsed = false;
+  firstErrorStr.clear();
+  firstErrorPos = 0;
+  currentPositionIt = expression.begin();
+  currentTokenType = TS_INVALID;
+  currentToken.clear();
+  S();
+
+  return firstErrorStr == "";
+}
+
+void VariableParser::ReadToken() {
+  currentTokenType = TS_INVALID;
+  currentToken.clear();
+  while (currentPositionIt != expression.end()) {
+    char32_t currentChar = *currentPositionIt;
+    if (currentChar == U'[' || currentChar == U']' || currentChar == U'.') {
+      if (currentTokenType == TS_VARNAME)
+        return;  // We've parsed a variable name.
+    }
+
+    if (currentChar == U'[') {
+      currentTokenType = TS_OPENING_BRACKET;
+      currentToken.clear();
+      ++currentPositionIt;
+      return;
+    } else if (currentChar == U']') {
+      currentTokenType = TS_CLOSING_BRACKET;
+      currentToken.clear();
+      ++currentPositionIt;
+      return;
+    } else if (currentChar == U'.') {
+      currentTokenType = TS_PERIOD;
+      currentToken.clear();
+      ++currentPositionIt;
+      return;
+    }
+
+    currentTokenType = TS_VARNAME;  // We're parsing a variable name.
+    currentToken.push_back(currentChar);
+    ++currentPositionIt;
+  }
+
+  // Can be reached if we are at the end of the expression. In this case,
+  // currentTokenType will be either TS_VARNAME or TS_INVALID.
+}
+
+void VariableParser::S() {
+  ReadToken();
+  if (currentTokenType != TS_VARNAME) {
+    firstErrorStr = _("Expecting a variable name.");
+    firstErrorPos = std::distance<gd::String::const_iterator>(
+        expression.begin(), currentPositionIt);
+    return;
+  }
+
+  if (!rootVariableParsed) {
+    rootVariableParsed = true;
+    if (callbacks) callbacks->OnRootVariable(currentToken);
+  } else if (callbacks)
+    callbacks->OnChildVariable(currentToken);
+
+  X();
+}
+
+void VariableParser::X() {
+  ReadToken();
+  if (currentTokenType == TS_INVALID)
+    return;  // Ended parsing.
+  else if (currentTokenType == TS_PERIOD)
+    S();
+  else if (currentTokenType == TS_OPENING_BRACKET) {
+    gd::String strExpr = SkipStringExpression();
+
+    ReadToken();
+    if (currentTokenType != TS_CLOSING_BRACKET) {
+      firstErrorStr = _("Expecting ]");
+      firstErrorPos = std::distance<gd::String::const_iterator>(
+          expression.begin(), currentPositionIt);
+      return;
+    }
+    if (callbacks) callbacks->OnChildSubscript(strExpr);
+    X();
+  }
+}
+
+gd::String VariableParser::SkipStringExpression() {
+  gd::String stringExpression;
+  bool insideStringLiteral = false;
+  bool lastCharacterWasBackslash = false;
+  unsigned int nestedBracket = 0;
+  while (currentPositionIt != expression.end()) {
+    char32_t currentChar = *currentPositionIt;
+    if (currentChar == U'\"') {
+      if (!insideStringLiteral)
+        insideStringLiteral = true;
+      else if (!lastCharacterWasBackslash)
+        insideStringLiteral = false;
+    } else if (currentChar == U'[' && !insideStringLiteral) {
+      nestedBracket++;
+    } else if (currentChar == U']' && !insideStringLiteral) {
+      if (nestedBracket == 0)
+        return stringExpression;  // Found the end of the string litteral.
+      nestedBracket--;
+    }
+
+    lastCharacterWasBackslash = currentChar == U'\\';
+    stringExpression.push_back(currentChar);
+    ++currentPositionIt;
+  }
+
+  // End of the expression reached (so expression is invalid by the way)
+  return stringExpression;
+}
+
+}  // namespace gd
--- a/Core/GDCore/Events/Parsers/VariableParser.h
+++ b/Core/GDCore/Events/Parsers/VariableParser.h
@@ -0,0 +1,148 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+#ifndef GDCORE_VARIABLEPARSER_H
+#define GDCORE_VARIABLEPARSER_H
+
+#include <vector>
+#include "GDCore/String.h"
+namespace gd {
+class Layout;
+}
+namespace gd {
+class Project;
+}
+namespace gd {
+class Platform;
+}
+namespace gd {
+class VariableParserCallbacks;
+}
+
+namespace gd {
+
+/** \brief Parse a variable expression.
+ *
+ * Parse an variable expression ( like
+myVariable.child["subchild"+ToString(i)].subsubchild ),
+ * calling callbacks when a token is reached.
+ *
+ * Usage example:
+\code
+    //...
+
+    //VariableCodeGenerationCallbacks is a class inheriting from
+gd::VariableParserCallbacks VariableCodeGenerationCallbacks callbacks(output,
+*this, context, VariableCodeGenerationCallbacks::PROJECT_VARIABLE);
+
+    gd::VariableParser parser(parameter);
+    if ( !parser.Parse(callbacks) )
+        cout << "Error :" << parser.GetFirstError() << " in: "<< parameter <<
+endl;
+\endcode
+ *
+ * Here is the parsed grammar:   <br>
+ * S -> VarName X  <br>
+ * X -> e | . S | [StringExpression] X   <br>
+ *
+ * where e = nothing (end of expression), StringExpression = A valid string
+expression and
+ * S is the start.
+ *
+ * \see gd::VariableParserCallbacks
+ */
+class GD_CORE_API VariableParser {
+ public:
+  /**
+   * \brief Default constructor
+   * \param expressionPlainString The string representing the expression to be
+   * parsed.
+   */
+  VariableParser(const gd::String& expressionPlainString_)
+      : currentPositionIt(), expression(expressionPlainString_){};
+  virtual ~VariableParser();
+
+  /**
+   * Parse the expression, calling each callback when necessary.
+   * \param callbacks The callbacks to be called.
+   * \return true if expression was correctly parsed.
+   * \see gd::VariableParserCallbacks
+   */
+  bool Parse(VariableParserCallbacks& callbacks);
+
+  /**
+   * \brief Return the description of the error that was found
+   */
+  const gd::String& GetFirstError() { return firstErrorStr; }
+
+  /**
+   * \brief Return the position of the error that was found
+   * \return The position, or gd::String::npos if no error is found
+   */
+  size_t GetFirstErrorPosition() { return firstErrorPos; }
+
+  gd::String firstErrorStr;
+  size_t firstErrorPos;
+
+ private:
+  void S();
+  void X();
+
+  /**
+   * \brief Skip the string expression, starting from the current position.
+   * \return The string expression skipped. currentPosition is now put on the
+   * closing bracket.
+   */
+  gd::String SkipStringExpression();
+
+  void ReadToken();
+
+  enum TokenType {
+    TS_PERIOD,
+    TS_OPENING_BRACKET,
+    TS_CLOSING_BRACKET,
+    TS_VARNAME,
+    TS_INVALID
+  };
+
+  TokenType currentTokenType;
+  gd::String currentToken;
+  gd::String::const_iterator currentPositionIt;
+  gd::String expression;
+
+  VariableParserCallbacks* callbacks;
+  bool rootVariableParsed;
+};
+
+/**
+ * \brief Callbacks called by VariableParser when parsing a variable expression.
+ */
+class GD_CORE_API VariableParserCallbacks {
+ public:
+  /**
+   * \brief Called when the first variable has been parsed. ( varName1 in
+   * varName1.child for example. ) \param variableName The variable name.
+   */
+  virtual void OnRootVariable(gd::String variableName) = 0;
+
+  /**
+   * \brief Called when accessing the child of a structure variable. ( child in
+   * varName1.child for example. ) \param variableName The child variable name.
+   */
+  virtual void OnChildVariable(gd::String variableName) = 0;
+
+  /**
+   * \brief Called when accessing the child of a structure variable using a
+   * string expression in square brackets. ( "subscript" in
+   * varName1["subscript"] for example. )
+   *
+   * \param variableName The expression used to access the child variable.
+   */
+  virtual void OnChildSubscript(gd::String stringExpression) = 0;
+};
+
+}  // namespace gd
+
+#endif  // GDEXPRESSIONPARSER_H
--- a/Core/GDCore/Events/Serialization.cpp
+++ b/Core/GDCore/Events/Serialization.cpp
@@ -4,7 +4,6 @@
 * reserved. This project is released under the MIT License.
 */
 #include "GDCore/Events/Serialization.h"
-
 #include "GDCore/CommonTools.h"
 #include "GDCore/Events/Event.h"
 #include "GDCore/Events/EventsList.h"
@@ -184,8 +183,8 @@ void EventsListSerialization::UpdateInstructionsFromGD2x(
    for (std::size_t j = 0;
         j < parameters.size() && j < metadata.parameters.size();
         ++j) {
-      if (metadata.parameters[j].GetType() == "relationalOperator" ||
-          metadata.parameters[j].GetType() == "operator") {
+      if (metadata.parameters[j].type == "relationalOperator" ||
+          metadata.parameters[j].type == "operator") {
        if (j == parameters.size() - 1) {
          std::cout << "ERROR: No more parameters after a [relational]operator "
                       "when trying to update an instruction from GD2.x";
@@ -219,8 +218,8 @@ void EventsListSerialization::UnserializeEventsFrom(
      event = std::make_shared<EmptyEvent>();
    }

-    event->SetDisabled(eventElem.GetBoolAttribute("disabled", false));
-    event->SetFolded(eventElem.GetBoolAttribute("folded", false));
+    event->SetDisabled(eventElem.GetBoolAttribute("disabled"));
+    event->SetFolded(eventElem.GetBoolAttribute("folded"));

    list.InsertEvent(event, list.GetEventsCount());
  }
@@ -233,9 +232,8 @@ void EventsListSerialization::SerializeEventsTo(const EventsList& list,
    const gd::BaseEvent& event = list.GetEvent(j);
    SerializerElement& eventElem = events.AddChild("event");

-    if (event.IsDisabled())
-      eventElem.SetAttribute("disabled", event.IsDisabled());
-    if (event.IsFolded()) eventElem.SetAttribute("folded", event.IsFolded());
+    eventElem.SetAttribute("disabled", event.IsDisabled());
+    eventElem.SetAttribute("folded", event.IsFolded());
    eventElem.AddChild("type").SetValue(event.GetType());

    event.SerializeTo(eventElem);
@@ -269,9 +267,6 @@ void gd::EventsListSerialization::UnserializeInstructionsFrom(
        instrElement.GetChild("type", 0, "Type")
            .GetBoolAttribute("inverted", false, "Contraire"));

-    instruction.SetAwaited(
-        instrElement.GetChild("type", 0, "Type").GetBoolAttribute("await"));
-
    // Read parameters
    vector<gd::Expression> parameters;

@@ -345,12 +340,9 @@ void gd::EventsListSerialization::SerializeInstructionsTo(
  instructions.ConsiderAsArrayOf("instruction");
  for (std::size_t k = 0; k < list.size(); k++) {
    SerializerElement& instruction = instructions.AddChild("instruction");
-    instruction.AddChild("type").SetAttribute("value", list[k].GetType());
-
-    if (list[k].IsInverted())
-      instruction.GetChild("type").SetAttribute("inverted", true);
-    if (list[k].IsAwaited())
-      instruction.GetChild("type").SetAttribute("await", true);
+    instruction.AddChild("type")
+        .SetAttribute("value", list[k].GetType())
+        .SetAttribute("inverted", list[k].IsInverted());

    // Parameters
    SerializerElement& parameters = instruction.AddChild("parameters");
@@ -360,10 +352,9 @@ void gd::EventsListSerialization::SerializeInstructionsTo(
          .SetValue(list[k].GetParameter(l).GetPlainString());

    // Sub instructions
-    if (!list[k].GetSubInstructions().empty()) {
-      SerializeInstructionsTo(list[k].GetSubInstructions(),
-                              instruction.AddChild("subInstructions"));
-    }
+    SerializerElement& subInstructions =
+        instruction.AddChild("subInstructions");
+    SerializeInstructionsTo(list[k].GetSubInstructions(), subInstructions);
  }
 }

--- a/Core/GDCore/Events/Tools/EventsCodeNameMangler.cpp
+++ b/Core/GDCore/Events/Tools/EventsCodeNameMangler.cpp
@@ -8,16 +8,11 @@
 #include "GDCore/CommonTools.h"
 #include "GDCore/String.h"

-EventsCodeNameMangler *EventsCodeNameMangler::_singleton = nullptr;
+EventsCodeNameMangler *EventsCodeNameMangler::_singleton = NULL;

-const gd::String& EventsCodeNameMangler::GetMangledObjectsListName(
+gd::String EventsCodeNameMangler::GetMangledObjectsListName(
    const gd::String &originalObjectName) {
-  auto it = mangledObjectNames.find(originalObjectName);
-  if (it != mangledObjectNames.end()) {
-    return it->second;
-  }
-
-  gd::String partiallyMangledName = GetMangledNameWithForbiddenUnderscore(originalObjectName);
+  gd::String partiallyMangledName = originalObjectName;
  static const gd::String allowedCharacters =
      "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";

@@ -32,26 +27,12 @@ const gd::String& EventsCodeNameMangler::GetMangledObjectsListName(
    }
  }

-  mangledObjectNames[originalObjectName] = "GD" + partiallyMangledName + "Objects";
-  return mangledObjectNames[originalObjectName];
+  return "GD" + partiallyMangledName + "Objects";
 }

-const gd::String& EventsCodeNameMangler::GetExternalEventsFunctionMangledName(
+gd::String EventsCodeNameMangler::GetExternalEventsFunctionMangledName(
    const gd::String &externalEventsName) {
-  auto it = mangledExternalEventsNames.find(externalEventsName);
-  if (it != mangledExternalEventsNames.end()) {
-    return it->second;
-  }
-
-  gd::String partiallyMangledName = GetMangledNameWithForbiddenUnderscore(externalEventsName);
-
-  mangledExternalEventsNames[externalEventsName] = "GDExternalEvents" + partiallyMangledName;
-  return mangledExternalEventsNames[externalEventsName];
-}
-
-gd::String EventsCodeNameMangler::GetMangledNameWithForbiddenUnderscore(
-    const gd::String &name) {
-  gd::String partiallyMangledName = name;
+  gd::String partiallyMangledName = externalEventsName;
  static const gd::String allowedCharacters =
      "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";

@@ -65,44 +46,24 @@ gd::String EventsCodeNameMangler::GetMangledNameWithForbiddenUnderscore(
      partiallyMangledName.replace(i, 1, "_" + gd::String::From(unallowedChar));
    }
  }
-  return partiallyMangledName;
+
+  return "GDExternalEvents" + partiallyMangledName;
 }

-gd::String EventsCodeNameMangler::GetMangledName(
-    const gd::String &name) {
-  gd::String partiallyMangledName = name;
-  static const gd::String allowedCharacters =
-      "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_";
-
-  for (size_t i = 0; i < partiallyMangledName.size();
-       ++i)  // Replace all unallowed letter by an underscore and the ascii
-             // number of the letter
-  {
-    if (allowedCharacters.find_first_of(
-            std::u32string(1, partiallyMangledName[i])) == gd::String::npos) {
-      char32_t unallowedChar = partiallyMangledName[i];
-      partiallyMangledName.replace(i, 1, "_" + gd::String::From(unallowedChar));
-    }
-  }
-  return partiallyMangledName;
-}
-
-
-
-const gd::String& ManObjListName(const gd::String &objectName) {
+gd::String ManObjListName(const gd::String &objectName) {
  return EventsCodeNameMangler::Get()->GetMangledObjectsListName(objectName);
 }

 EventsCodeNameMangler *EventsCodeNameMangler::Get() {
-  if (nullptr == _singleton) _singleton = new EventsCodeNameMangler;
+  if (NULL == _singleton) _singleton = new EventsCodeNameMangler;

  return (static_cast<EventsCodeNameMangler *>(_singleton));
 }

 void EventsCodeNameMangler::DestroySingleton() {
-  if (nullptr != _singleton) {
+  if (NULL != _singleton) {
    delete _singleton;
-    _singleton = nullptr;
+    _singleton = NULL;
  }
 }

--- a/Core/GDCore/Events/Tools/EventsCodeNameMangler.h
+++ b/Core/GDCore/Events/Tools/EventsCodeNameMangler.h
@@ -6,38 +6,28 @@
 #if defined(GD_IDE_ONLY)
 #ifndef EVENTSCODENAMEMANGLER_H
 #define EVENTSCODENAMEMANGLER_H
-#include <unordered_map>
 #include "GDCore/String.h"

 /**
- * \brief Mangle object names, so as to ensure all names used in code are valid.
+ * Manage name mangling, so as to ensure all names used in code are valid.
 *
 * \see ManObjListName
 */
 class GD_CORE_API EventsCodeNameMangler {
 public:
  /**
-   * Get the mangled name from a name: All characters that are not 0-9, a-z,
+   * Get the mangled name from a name : All characters that are not 0-9, a-z,
   * A-Z or _ are replaced by "_"+AsciiCodeOfTheCharacter.
-   *
-   * The mangled name is memoized as this is intensively used during project
-   * export and events code generation.
   */
-  const gd::String &GetMangledObjectsListName(
-      const gd::String &originalObjectName);
+  gd::String GetMangledObjectsListName(const gd::String &originalObjectName);

  /**
   * Get the mangled function name to be used to call external events named \a
   * externalEventsName.
-   *
-   * The mangled name is memoized as this is intensively used during project
-   * export and events code generation.
   */
-  const gd::String &GetExternalEventsFunctionMangledName(
+  gd::String GetExternalEventsFunctionMangledName(
      const gd::String &externalEventsName);

-  static gd::String GetMangledName(const gd::String &name);
-
  static EventsCodeNameMangler *Get();
  static void DestroySingleton();

@@ -45,25 +35,14 @@ class GD_CORE_API EventsCodeNameMangler {
  EventsCodeNameMangler(){};
  virtual ~EventsCodeNameMangler(){};
  static EventsCodeNameMangler *_singleton;
-
-  // This method is inlined to avoid to copy the returned string.
-  static inline gd::String GetMangledNameWithForbiddenUnderscore(const gd::String &name);
-
-  std::unordered_map<gd::String, gd::String>
-      mangledObjectNames;  ///< Memoized results of mangling for objects
-  std::unordered_map<gd::String, gd::String>
-      mangledExternalEventsNames;  ///< Memoized results of mangling for
-                                   /// external events
 };

 /**
- * Shortcut for
- * `EventsCodeNameMangler::Get()->GetMangledObjectsListName(objectName)`.
- *
- * \see EventsCodeNameMangler
- * \return Mangled object name
+ * Shortcut to
+ * EventsCodeNameMangler::Get()->GetMangledObjectsListName(objectName). \see
+ * EventsCodeNameMangler \return Mangled object name
 */
-const gd::String &GD_CORE_API ManObjListName(const gd::String &objectName);
+gd::String GD_CORE_API ManObjListName(const gd::String &objectName);

 #endif  // EVENTSCODENAMEMANGLER_H
 #endif
--- a/Core/GDCore/Extensions/Builtin/AdvancedExtension.cpp
+++ b/Core/GDCore/Extensions/Builtin/AdvancedExtension.cpp
@@ -11,16 +11,26 @@ namespace gd {

 void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
    gd::PlatformExtension& extension) {
+  extension.SetExtensionInformation(
+      "BuiltinAdvanced",
+      _("Advanced control features"),
+      _("Built-in extension providing advanced control features."),
+      "Florian Rival",
+      "Open source (MIT License)");
+
+#if defined(GD_IDE_ONLY)
  extension
-      .SetExtensionInformation(
-          "BuiltinAdvanced",
-          _("Event functions"),
-          _("Advanced control features for functions made with events."),
-          "Florian Rival",
-          "Open source (MIT License)")
-      .SetCategory("Advanced");
-  extension.AddInstructionOrExpressionGroupMetadata(_("Event functions"))
-      .SetIcon("res/function32.png");
+      .AddCondition("Toujours",
+                    _("Always"),
+                    _("This condition always returns true (or always false, if "
+                      "the condition is inverted)."),
+                    _("Always"),
+                    _("Other"),
+                    "res/conditions/toujours24.png",
+                    "res/conditions/toujours.png")
+      .SetHelpPath("/all-features/advanced-conditions")
+      .AddCodeOnlyParameter("conditionInverted", "")
+      .MarkAsAdvanced();

  extension
      .AddAction(
@@ -29,12 +39,11 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
          _("Set the return value of the events function to the specified "
            "number (to be used with \"Expression\" functions)."),
          _("Set return value to number _PARAM0_"),
-          "",
-          "res/function32.png",
-          "res/function32.png")
+          _("Functions"),
+          "res/function24.png",
+          "res/function16.png")
      .SetHelpPath("/events/functions/return")
-      .AddParameter("expression", _("The number to be returned"))
-      .SetRelevantForFunctionEventsOnly()
+      .AddParameter("expression", "The number to be returned")
      .MarkAsAdvanced();

  extension
@@ -44,12 +53,11 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
          _("Set the return value of the events function to the specified text "
            "(to be used with \"String Expression\" functions)."),
          _("Set return value to text _PARAM0_"),
-          "",
-          "res/function32.png",
-          "res/function32.png")
+          _("Functions"),
+          "res/function24.png",
+          "res/function16.png")
      .SetHelpPath("/events/functions/return")
-      .AddParameter("string", _("The text to be returned"))
-      .SetRelevantForFunctionEventsOnly()
+      .AddParameter("string", "The text to be returned")
      .MarkAsAdvanced();

  extension
@@ -58,106 +66,31 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAdvancedExtension(
                 _("Set the return value of the Condition events function to "
                   "either true (condition will pass) or false."),
                 _("Set return value of the condition to _PARAM0_"),
-                 "",
-                 "res/function32.png",
-                 "res/function32.png")
+                 _("Functions"),
+                 "res/function24.png",
+                 "res/function16.png")
      .SetHelpPath("/events/functions/return")
-      .AddParameter("trueorfalse", _("Should the condition be true or false?"))
-      .SetRelevantForFunctionEventsOnly()
-      .MarkAsAdvanced();
-
-  extension
-      .AddAction("CopyArgumentToVariable",
-                 _("Copy function parameter to variable"),
-                 _("Copy a function parameter (also called \"argument\") to a variable. "
-                 "The parameter type must be a variable."),
-                 _("Copy the parameter _PARAM0_ into the variable _PARAM1_"),
-                 "",
-                 "res/function32.png",
-                 "res/function32.png")
-      .SetHelpPath("/events/functions/return")
-      .AddParameter("functionParameterName", _("Parameter name"), "variable")
-      .AddParameter("scenevar", _("Scene variable"))
-      .SetRelevantForFunctionEventsOnly()
-      .MarkAsAdvanced();
-
-  extension
-      .AddAction("CopyVariableToArgument",
-                 _("Copy variable to function parameter"),
-                 _("Copy a variable to function parameter (also called \"argument\"). "
-                 "The parameter type must be a variable."),
-                 _("Copy the variable _PARAM1_ into the parameter _PARAM0_"),
-                 "",
-                 "res/function32.png",
-                 "res/function32.png")
-      .SetHelpPath("/events/functions/return")
-      .AddParameter("functionParameterName", _("Parameter name"), "variable")
-      .AddParameter("scenevar", _("Scene variable"))
-      .SetRelevantForFunctionEventsOnly()
-      .MarkAsAdvanced();
-
-  extension
-      .AddCondition("GetArgumentAsBoolean",
-                    _("Check if a function parameter is set to true (or yes)"),
-                    _("Check if the specified function parameter (also called "
-                      "\"argument\") is set to True or Yes. If the argument is "
-                      "a string, an empty string is considered as \"false\". "
-                      "If it's a number, 0 is considered as \"false\"."),
-                    _("Parameter _PARAM0_ is true"),
-                    "",
-                    "res/function32.png",
-                    "res/function32.png")
-      .AddParameter("functionParameterName", _("Parameter name"), "number,string,boolean")
-      .SetRelevantForFunctionEventsOnly()
+      .AddParameter("trueorfalse", "Should the condition be true or false?")
      .MarkAsAdvanced();

  extension
      .AddExpression(
          "GetArgumentAsNumber",
          _("Get function parameter value"),
-          _("Get function parameter (also called \"argument\") value."),
-          "",
+          _("Get function parameter (also called \"argument\") value"),
+          _("Functions"),
          "res/function16.png")
-      .AddParameter("functionParameterName", _("Parameter name"), "number,string,boolean")
-      .SetRelevantForFunctionEventsOnly();
+      .AddParameter("string", "Parameter name");

  extension
      .AddStrExpression(
          "GetArgumentAsString",
          _("Get function parameter text"),
-          _("Get function parameter (also called \"argument\") text."),
-          "",
+          _("Get function parameter (also called \"argument\") text "),
+          _("Functions"),
          "res/function16.png")
-      .AddParameter("functionParameterName", _("Parameter name"), "number,string,boolean")
-      .SetRelevantForFunctionEventsOnly();
-
-  extension
-      .AddCondition(
-          "CompareArgumentAsNumber",
-          _("Compare function parameter value"),
-          _("Compare function parameter (also called \"argument\") value."),
-          _("Parameter _PARAM0_"),
-          "",
-          "res/function32.png",
-          "res/function16.png")
-      .AddParameter("functionParameterName", _("Parameter name"), "number,string,boolean")
-      .UseStandardRelationalOperatorParameters(
-          "number", gd::ParameterOptions::MakeNewOptions())
-      .SetRelevantForFunctionEventsOnly();
-
-  extension
-      .AddCondition(
-          "CompareArgumentAsString",
-          _("Compare function parameter text"),
-          _("Compare function parameter (also called \"argument\") text."),
-          _("Parameter _PARAM0_"),
-          "",
-          "res/function32.png",
-          "res/function16.png")
-      .AddParameter("functionParameterName", _("Parameter name"), "number,string,boolean")
-      .UseStandardRelationalOperatorParameters(
-          "string", gd::ParameterOptions::MakeNewOptions())
-      .SetRelevantForFunctionEventsOnly();
+      .AddParameter("string", "Parameter name");
+#endif
 }

 }  // namespace gd
--- a/Core/GDCore/Extensions/Builtin/AllBuiltinExtensions.h
+++ b/Core/GDCore/Extensions/Builtin/AllBuiltinExtensions.h
@@ -15,6 +15,8 @@ namespace gd {
 * so that it provides standards events, objects or instructions of an
 * extension.
 *
+ * TOOD: Usage example.
+ *
 * \ingroup BuiltinExtensions
 */
 class GD_CORE_API BuiltinExtensionsImplementer {
@@ -30,6 +32,7 @@ class GD_CORE_API BuiltinExtensionsImplementer {
  static void ImplementsExternalLayoutsExtension(
      gd::PlatformExtension& extension);
  static void ImplementsFileExtension(gd::PlatformExtension& extension);
+  static void ImplementsJoystickExtension(gd::PlatformExtension& extension);
  static void ImplementsKeyboardExtension(gd::PlatformExtension& extension);
  static void ImplementsMathematicalToolsExtension(
      gd::PlatformExtension& extension);
@@ -42,13 +45,6 @@ class GD_CORE_API BuiltinExtensionsImplementer {
  static void ImplementsTimeExtension(gd::PlatformExtension& extension);
  static void ImplementsVariablesExtension(gd::PlatformExtension& extension);
  static void ImplementsWindowExtension(gd::PlatformExtension& extension);
-  static void ImplementsAsyncExtension(gd::PlatformExtension& extension);
-  static void ImplementsResizableExtension(gd::PlatformExtension& extension);
-  static void ImplementsScalableExtension(gd::PlatformExtension& extension);
-  static void ImplementsFlippableExtension(gd::PlatformExtension& extension);
-  static void ImplementsAnimatableExtension(gd::PlatformExtension& extension);
-  static void ImplementsEffectExtension(gd::PlatformExtension& extension);
-  static void ImplementsOpacityExtension(gd::PlatformExtension& extension);
 };

 }  // namespace gd
--- a/Core/GDCore/Extensions/Builtin/AsyncExtension.cpp
+++ b/Core/GDCore/Extensions/Builtin/AsyncExtension.cpp
@@ -1,47 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the MIT License.
- */
-#include "AllBuiltinExtensions.h"
-#include "GDCore/Events/Builtin/AsyncEvent.h"
-#include "GDCore/Tools/Localization.h"
-
-using namespace std;
-namespace gd {
-
-void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAsyncExtension(
-    gd::PlatformExtension &extension) {
-  extension
-      .SetExtensionInformation(
-          "BuiltinAsync",
-          _("Asynchronous functions"),
-          _("Functions that defer the execution of the events after it."),
-          "Arthur Pacaud (arthuro555)",
-          "Open source (MIT License)")
-      .SetCategory("Advanced");
-  extension.AddInstructionOrExpressionGroupMetadata(_("Asynchronous functions"))
-      .SetIcon("res/function32.png");
-
-  extension.AddEvent("Async",
-                     _("Async event"),
-                     _("Internal event for asynchronous actions"),
-                     "",
-                     "res/eventaddicon.png",
-                     std::make_shared<gd::AsyncEvent>());
-
-  extension
-      .AddAction(
-          "ResolveAsyncEventsFunction",
-          _("End asynchronous function"),
-          _("Mark an asynchronous function as finished. This will allow the "
-            "actions and subevents following it to be run."),
-          "Mark asynchronous function as ended",
-          "",
-          "res/actions/quit24.png",
-          "res/actions/quit.png")
-      .AddCodeOnlyParameter("eventsFunctionContext", "")
-      .SetRelevantForAsynchronousFunctionEventsOnly();
-}
-
-}  // namespace gd
--- a/Core/GDCore/Extensions/Builtin/AudioExtension.cpp
+++ b/Core/GDCore/Extensions/Builtin/AudioExtension.cpp
@@ -12,20 +12,14 @@ namespace gd {
 void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
    gd::PlatformExtension& extension) {
  extension
-      .SetExtensionInformation(
-          "BuiltinAudio",
-          _("Sounds and music"),
-          _("GDevelop provides several conditions and actions to play audio "
-            "files. They can be either long music or short sound effects."),
-          "Florian Rival",
-          "Open source (MIT License)")
-      .SetExtensionHelpPath("/all-features/audio")
-      .SetCategory("Audio");
-  extension.AddInstructionOrExpressionGroupMetadata(_("Sounds and music"))
-      .SetIcon("res/actions/music24.png");
-  extension.AddInstructionOrExpressionGroupMetadata(_("Sounds on channels"))
-      .SetIcon("res/actions/son24.png");
+      .SetExtensionInformation("BuiltinAudio",
+                               _("Audio"),
+                               _("Builtin audio extension"),
+                               "Florian Rival",
+                               "Open source (MIT License)")
+      .SetExtensionHelpPath("/all-features/audio");

+#if defined(GD_IDE_ONLY)
  extension
      .AddAction("PlaySoundCanal",
                 _("Play a sound on a channel"),
@@ -33,7 +27,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
                   "you'll be able to manipulate it."),
                 _("Play the sound _PARAM1_ on the channel _PARAM2_, vol.: "
                   "_PARAM4_, loop: _PARAM3_"),
-                 _("Sounds on channels"),
+                 _("Audio/Sounds on channels"),
                 "res/actions/son24.png",
                 "res/actions/son.png")
      .AddCodeOnlyParameter("currentScene", "")
@@ -54,7 +48,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
                 _("Stop the sound of a channel"),
                 _("Stop the sound on the specified channel."),
                 _("Stop the sound of channel _PARAM1_"),
-                 _("Sounds on channels"),
+                 _("Audio/Sounds on channels"),
                 "res/actions/son24.png",
                 "res/actions/son.png")
      .AddCodeOnlyParameter("currentScene", "")
@@ -66,7 +60,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
                 _("Pause the sound of a channel"),
                 _("Pause the sound played on the specified channel."),
                 _("Pause the sound of channel _PARAM1_"),
-                 _("Sounds on channels"),
+                 _("Audio/Sounds on channels"),
                 "res/actions/son24.png",
                 "res/actions/son.png")
      .AddCodeOnlyParameter("currentScene", "")
@@ -75,10 +69,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(

  extension
      .AddAction("RePlaySoundCanal",
-                 _("Resume playing a sound on a channel"),
-                 _("Resume playing a sound on a channel that was paused."),
-                 _("Resume the sound of channel _PARAM1_"),
-                 _("Sounds on channels"),
+                 _("Play the sound of a channel"),
+                 _("Play the sound of the channel."),
+                 _("Play the sound of channel _PARAM1_"),
+                 _("Audio/Sounds on channels"),
                 "res/actions/son24.png",
                 "res/actions/son.png")
      .AddCodeOnlyParameter("currentScene", "")
@@ -92,7 +86,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
                   "able to interact with it later."),
                 _("Play the music _PARAM1_ on channel _PARAM2_, vol.: "
                   "_PARAM4_, loop: _PARAM3_"),
-                 _("Music on channels"),
+                 _("Audio/Music on channels"),
                 "res/actions/music24.png",
                 "res/actions/music.png")
      .AddCodeOnlyParameter("currentScene", "")
@@ -113,7 +107,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
                 _("Stop the music on a channel"),
                 _("Stop the music on the specified channel"),
                 _("Stop the music of channel _PARAM1_"),
-                 _("Music on channels"),
+                 _("Audio/Music on channels"),
                 "res/actions/music24.png",
                 "res/actions/music.png")
      .AddCodeOnlyParameter("currentScene", "")
@@ -125,7 +119,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
                 _("Pause the music of a channel"),
                 _("Pause the music on the specified channel."),
                 _("Pause the music of channel _PARAM1_"),
-                 _("Music on channels"),
+                 _("Audio/Music on channels"),
                 "res/actions/music24.png",
                 "res/actions/music.png")
      .AddCodeOnlyParameter("currentScene", "")
@@ -134,10 +128,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(

  extension
      .AddAction("RePlayMusicCanal",
-                 _("Resume playing a music on a channel"),
-                 _("Resume playing a music on a channel that was paused."),
-                 _("Resume the music of channel _PARAM1_"),
-                 _("Music on channels"),
+                 _("Play the music of a channel"),
+                 _("Play the music of the channel."),
+                 _("Play the music of channel _PARAM1_"),
+                 _("Audio/Music on channels"),
                 "res/actions/music24.png",
                 "res/actions/music.png")
      .AddCodeOnlyParameter("currentScene", "")
@@ -148,83 +142,69 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
      .AddAction("ModVolumeSoundCanal",
                 _("Volume of the sound on a channel"),
                 _("This action modifies the volume of the sound on the "
-                   "specified channel."),
+                   "specified channel. The volume is between 0 and 100."),
                 _("the volume of the sound on channel _PARAM1_"),
-                 _("Sounds on channels"),
+                 _("Audio/Sounds on channels"),
                 "res/actions/sonVolume24.png",
                 "res/actions/sonVolume.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("expression", _("Channel identifier"))
-      .UseStandardOperatorParameters(
-          "number",
-          ParameterOptions::MakeNewOptions().SetDescription(
-              _("Volume (0-100)")))
+      .UseStandardOperatorParameters("number")
      .MarkAsAdvanced();

  extension
      .AddAction("ModVolumeMusicCanal",
                 _("Volume of the music on a channel"),
                 _("This action modifies the volume of the music on the "
-                   "specified channel."),
+                   "specified channel. The volume is between 0 and 100."),
                 _("the volume of the music on channel _PARAM1_"),
-                 _("Music on channels"),
+                 _("Audio/Music on channels"),
                 "res/actions/musicVolume24.png",
                 "res/actions/musicVolume.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("expression", _("Channel identifier"))
-      .UseStandardOperatorParameters(
-          "number",
-          ParameterOptions::MakeNewOptions().SetDescription(
-              _("Volume (0-100)")))
+      .UseStandardOperatorParameters("number")
      .MarkAsAdvanced();

  extension
      .AddAction("ModGlobalVolume",
                 _("Game global volume"),
-                 _("This action modifies the global volume of the game."),
+                 _("This action modifies the global volume of the game. The "
+                   "volume is between 0 and 100."),
                 _("the global sound level"),
-                 "",
+                 _("Audio"),
                 "res/actions/volume24.png",
                 "res/actions/volume.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .UseStandardOperatorParameters(
-          "number",
-          ParameterOptions::MakeNewOptions().SetDescription(
-              _("Volume (0-100)")))
+      .UseStandardOperatorParameters("number")
      .MarkAsSimple();

  extension
      .AddAction("ModPitchSoundChannel",
                 _("Pitch of the sound of a channel"),
                 _("This action modifies the pitch (speed) of the sound on a "
-                   "channel."),
+                   "channel.\n1 is the default pitch."),
                 _("the pitch of the sound on channel _PARAM1_"),
-                 _("Sounds on channels"),
+                 _("Audio/Sounds on channels"),
                 "res/actions/son24.png",
                 "res/actions/son.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("expression", _("Channel identifier"))
-      .UseStandardOperatorParameters(
-          "number",
-          ParameterOptions::MakeNewOptions().SetDescription(
-              _("Pitch (1 by default)")))
+      .UseStandardOperatorParameters("number")
      .MarkAsAdvanced();

  extension
      .AddAction("ModPitchMusicChannel",
                 _("Pitch of the music on a channel"),
                 _("This action modifies the pitch of the music on the "
-                   "specified channel."),
+                   "specified channel. 1 is the default pitch"),
                 _("the pitch of the music on channel _PARAM1_"),
-                 _("Music on channels"),
+                 _("Audio/Music on channels"),
                 "res/actions/music24.png",
                 "res/actions/music.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("expression", _("Channel identifier"))
-      .UseStandardOperatorParameters(
-          "number",
-          ParameterOptions::MakeNewOptions().SetDescription(
-              _("Pitch (1 by default)")))
+      .UseStandardOperatorParameters("number")
      .MarkAsAdvanced();

  extension
@@ -233,15 +213,12 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
                 _("This action modifies the playing offset of the sound on a "
                   "channel"),
                 _("the playing offset of the sound on channel _PARAM1_"),
-                 _("Sounds on channels"),
+                 _("Audio/Sounds on channels"),
                 "res/actions/son24.png",
                 "res/actions/son.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("expression", _("Channel identifier"))
-      .UseStandardOperatorParameters(
-          "number",
-          ParameterOptions::MakeNewOptions().SetDescription(
-              _("Position (in seconds)")))
+      .UseStandardOperatorParameters("number")
      .MarkAsAdvanced();

  extension
@@ -250,15 +227,12 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
                 _("This action modifies the playing offset of the music on "
                   "the specified channel"),
                 _("the playing offset of the music on channel _PARAM1_"),
-                 _("Music on channels"),
+                 _("Audio/Music on channels"),
                 "res/actions/music24.png",
                 "res/actions/music.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("expression", _("Channel identifier"))
-      .UseStandardOperatorParameters(
-          "number",
-          ParameterOptions::MakeNewOptions().SetDescription(
-              _("Position (in seconds)")))
+      .UseStandardOperatorParameters("number")
      .MarkAsAdvanced();

  extension
@@ -266,7 +240,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
                 _("Play a sound"),
                 _("Play a sound."),
                 _("Play the sound _PARAM1_, vol.: _PARAM3_, loop: _PARAM2_"),
-                 "",
+                 _("Audio"),
                 "res/actions/son24.png",
                 "res/actions/son.png")
      .AddCodeOnlyParameter("currentScene", "")
@@ -286,7 +260,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
                 _("Play a music file"),
                 _("Play a music file."),
                 _("Play the music _PARAM1_, vol.: _PARAM3_, loop: _PARAM2_"),
-                 "",
+                 _("Audio"),
                 "res/actions/music24.png",
                 "res/actions/music.png")
      .AddCodeOnlyParameter("currentScene", "")
@@ -301,105 +275,12 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
      .SetDefaultValue("1")
      .MarkAsSimple();

-  extension
-      .AddAction("PreloadMusic",
-                 _("Preload a music file"),
-                 _("Preload a music file in memory."),
-                 _("Preload the music file _PARAM1_"),
-                 _("Loading"),
-                 "res/actions/music24.png",
-                 "res/actions/music.png")
-      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("musicfile", _("Audio file (or audio resource name)"))
-      .MarkAsComplex();
-
-  extension
-      .AddAction("PreloadSound",
-                 _("Preload a sound file"),
-                 _("Preload a sound file in memory."),
-                 _("Preload the sound file _PARAM1_"),
-                 _("Loading"),
-                 "res/actions/son24.png",
-                 "res/actions/son.png")
-      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("soundfile", _("Sound file (or sound resource name)"))
-      .MarkAsComplex();
-
-  extension
-      .AddAction(
-          "UnloadMusic",
-          _("Unload a music file"),
-          _("Unload a music file from memory. "
-            "Unloading a music file will cause any music playing it to stop."),
-          _("Unload the music file _PARAM1_"),
-          _("Loading"),
-          "res/actions/music24.png",
-          "res/actions/music.png")
-      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("musicfile", _("Audio file (or audio resource name)"))
-      .MarkAsComplex();
-
-  extension
-      .AddAction(
-          "UnloadSound",
-          _("Unload a sound file"),
-          _("Unload a sound file from memory. "
-            "Unloading a sound file will cause any sounds playing it to stop."),
-          _("Unload the sound file _PARAM1_"),
-          _("Loading"),
-          "res/actions/son24.png",
-          "res/actions/son.png")
-      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("soundfile", _("Sound file (or sound resource name)"))
-      .MarkAsComplex();
-
-  extension
-      .AddAction(
-          "UnloadAllAudio",
-          _("Unload all audio"),
-          _("Unload all the audio in memory. "
-            "This will cause every sound and music of the game to stop."),
-          _("Unload all audio files"),
-          _("Loading"),
-          "res/actions/music24.png",
-          "res/actions/music.png")
-      .AddCodeOnlyParameter("currentScene", "")
-      .MarkAsComplex();
-  extension
-      .AddAction(
-          "FadeSoundVolume",
-          _("Fade the volume of a sound played on a channel."),
-          _("Fade the volume of a sound played on a channel to the specified volume within the specified duration."),
-          _("Fade the sound on channel _PARAM1_ to volume _PARAM2_ within _PARAM3_ seconds"),
-          _("Sounds on channels"),
-          "res/actions/son24.png",
-          "res/actions/son.png")
-      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("expression", _("Channel identifier"))
-      .AddParameter("expression", _("Final volume (0-100)"))
-      .AddParameter("expression", _("Fading time in seconds"))
-      .MarkAsAdvanced();
-  extension
-      .AddAction(
-          "FadeMusicVolume",
-          _("Fade the volume of a music played on a channel."),
-          _("Fade the volume of a music played on a channel to the specified volume within the specified duration."),
-          _("Fade the music on channel _PARAM1_ to volume _PARAM2_ within _PARAM3_ seconds"),
-          _("Music on channels"),
-          "res/actions/music24.png",
-          "res/actions/music.png")
-      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("expression", _("Channel identifier"))
-      .AddParameter("expression", _("Final volume (0-100)"))
-      .AddParameter("expression", _("Fading time in seconds"))
-      .MarkAsAdvanced();
-
  extension
      .AddCondition("MusicPlaying",
                    _("A music file is being played"),
                    _("Test if the music on a channel is being played"),
                    _("Music on channel _PARAM1_ is being played"),
-                    _("Music on channels"),
+                    _("Audio/Music on channels"),
                    "res/conditions/musicplaying24.png",
                    "res/conditions/musicplaying.png")
      .AddCodeOnlyParameter("currentScene", "")
@@ -411,7 +292,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
                    _("A music file is paused"),
                    _("Test if the music on the specified channel is paused."),
                    _("Music on channel _PARAM1_ is paused"),
-                    _("Music on channels"),
+                    _("Audio/Music on channels"),
                    "res/conditions/musicpaused24.png",
                    "res/conditions/musicpaused.png")
      .AddCodeOnlyParameter("currentScene", "")
@@ -423,7 +304,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
                    _("A music file is stopped"),
                    _("Test if the music on the specified channel is stopped."),
                    _("Music on channel _PARAM1_ is stopped"),
-                    _("Music on channels"),
+                    _("Audio/Music on channels"),
                    "res/conditions/musicstopped24.png",
                    "res/conditions/musicstopped.png")
      .AddCodeOnlyParameter("currentScene", "")
@@ -435,7 +316,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
                    _("A sound is being played"),
                    _("Test if the sound on a channel is being played."),
                    _("Sound on channel _PARAM1_ is being played"),
-                    _("Sounds on channels"),
+                    _("Audio/Sounds on channels"),
                    "res/conditions/sonplaying24.png",
                    "res/conditions/sonplaying.png")
      .AddCodeOnlyParameter("currentScene", "")
@@ -447,7 +328,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
                    _("A sound is paused"),
                    _("Test if the sound on the specified channel is paused."),
                    _("Sound on channel _PARAM1_ is paused"),
-                    _("Sounds on channels"),
+                    _("Audio/Sounds on channels"),
                    "res/conditions/sonpaused24.png",
                    "res/conditions/sonpaused.png")
      .AddCodeOnlyParameter("currentScene", "")
@@ -459,7 +340,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
                    _("A sound is stopped"),
                    _("Test if the sound on the specified channel is stopped."),
                    _("Sound on channel _PARAM1_ is stopped"),
-                    _("Sounds on channels"),
+                    _("Audio/Sounds on channels"),
                    "res/conditions/sonstopped24.png",
                    "res/conditions/sonstopped.png")
      .AddCodeOnlyParameter("currentScene", "")
@@ -470,17 +351,15 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
      .AddCondition(
          "SoundCanalVolume",
          _("Volume of the sound on a channel"),
-          _("Test the volume of the sound on the specified channel."),
+          _("Test the volume of the sound on the specified channel. The volume "
+            "is between 0 and 100."),
          _("the volume of the sound on channel _PARAM1_"),
-          _("Sounds on channels"),
+          _("Audio/Sounds on channels"),
          "res/conditions/sonVolume24.png",
          "res/conditions/sonVolume.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("expression", _("Channel identifier"))
-      .UseStandardRelationalOperatorParameters(
-          "number",
-          ParameterOptions::MakeNewOptions().SetDescription(
-              _("Volume to compare to (0-100)")))
+      .UseStandardRelationalOperatorParameters("number")
      .MarkAsAdvanced();

  extension
@@ -490,15 +369,12 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
          _("Test the volume of the music on a specified channel. The volume "
            "is between 0 and 100."),
          _("the volume of the music on channel _PARAM1_"),
-          _("Music on channels"),
+          _("Audio/Music on channels"),
          "res/conditions/musicVolume24.png",
          "res/conditions/musicVolume.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("expression", _("Channel identifier"))
-      .UseStandardRelationalOperatorParameters(
-          "number",
-          ParameterOptions::MakeNewOptions().SetDescription(
-              _("Volume to compare to (0-100)")))
+      .UseStandardRelationalOperatorParameters("number")
      .MarkAsAdvanced();

  extension
@@ -507,14 +383,11 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
          _("Global volume"),
          _("Test the global sound level. The volume is between 0 and 100."),
          _("the global game volume"),
-          "",
+          _("Audio"),
          "res/conditions/volume24.png",
          "res/conditions/volume.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .UseStandardRelationalOperatorParameters(
-          "number",
-          ParameterOptions::MakeNewOptions().SetDescription(
-              _("Volume to compare to (0-100)")));
+      .UseStandardRelationalOperatorParameters("number");

  extension
      .AddCondition(
@@ -523,32 +396,27 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
          _("Test the pitch of the sound on the specified channel. 1 is the "
            "default pitch."),
          _("the pitch of the sound on channel _PARAM1_"),
-          _("Sounds on channels"),
+          _("Audio/Sounds on channels"),
          "res/conditions/sonVolume24.png",
          "res/conditions/sonVolume.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("expression", _("Channel identifier"))
-      .UseStandardRelationalOperatorParameters(
-          "number",
-          ParameterOptions::MakeNewOptions().SetDescription(
-              _("Pitch to compare to (1 by default)")))
+      .UseStandardRelationalOperatorParameters("number")
      .MarkAsAdvanced();

  extension
      .AddCondition(
          "MusicChannelPitch",
          _("Pitch of the music on a channel"),
-          _("Test the pitch (speed) of the music on a specified channel."),
+          _("Test the pitch (speed) of the music on a specified channel. 1 is "
+            "the default pitch."),
          _("the pitch of the music on channel _PARAM1_"),
-          _("Music on channels"),
+          _("Audio/Music on channels"),
          "res/conditions/musicVolume24.png",
          "res/conditions/musicVolume.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("expression", _("Channel identifier"))
-      .UseStandardRelationalOperatorParameters(
-          "number",
-          ParameterOptions::MakeNewOptions().SetDescription(
-              _("Pitch to compare to (1 by default)")))
+      .UseStandardRelationalOperatorParameters("number")
      .MarkAsAdvanced();

  extension
@@ -557,15 +425,12 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
          _("Playing offset of the sound on a channel"),
          _("Test the playing offset of the sound on the specified channel."),
          _("the playing offset of the sound on channel _PARAM1_"),
-          _("Sounds on channels"),
+          _("Audio/Sounds on channels"),
          "res/conditions/sonVolume24.png",
          "res/conditions/sonVolume.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("expression", _("Channel identifier"))
-      .UseStandardRelationalOperatorParameters(
-          "number",
-          ParameterOptions::MakeNewOptions().SetDescription(
-              _("Position to compare to (in seconds)")))
+      .UseStandardRelationalOperatorParameters("number")
      .MarkAsAdvanced();

  extension
@@ -574,15 +439,12 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
          _("Playing offset of the music on a channel"),
          _("Test the playing offset of the music on the specified channel."),
          _("the playing offset of the music on channel _PARAM1_"),
-          _("Music on channels"),
+          _("Audio/Music on channels"),
          "res/conditions/musicVolume24.png",
          "res/conditions/musicVolume.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("expression", _("Channel identifier"))
-      .UseStandardRelationalOperatorParameters(
-          "number",
-          ParameterOptions::MakeNewOptions().SetDescription(
-              _("Position to compare to (in seconds)")))
+      .UseStandardRelationalOperatorParameters("number")
      .MarkAsAdvanced();

  extension
@@ -646,6 +508,8 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAudioExtension(
                     _("Sound level"),
                     "res/conditions/volume.png")
      .AddCodeOnlyParameter("currentScene", "");
+
+#endif
 }

 }  // namespace gd
--- a/Core/GDCore/Extensions/Builtin/BaseObjectExtension.cpp
+++ b/Core/GDCore/Extensions/Builtin/BaseObjectExtension.cpp
--- a/Core/GDCore/Extensions/Builtin/CameraExtension.cpp
+++ b/Core/GDCore/Extensions/Builtin/CameraExtension.cpp
@@ -4,7 +4,6 @@
 * reserved. This project is released under the MIT License.
 */
 #include "AllBuiltinExtensions.h"
-#include "GDCore/Extensions/Metadata/MultipleInstructionMetadata.h"
 #include "GDCore/Tools/Localization.h"

 using namespace std;
@@ -13,218 +12,152 @@ namespace gd {
 void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
    gd::PlatformExtension& extension) {
  extension
-      .SetExtensionInformation(
-          "BuiltinCamera",
-          _("Layers and cameras"),
-          "Each scene can be composed of multiple layers. These conditions "
-          "and actions allow to manipulate them during the game. In "
-          "particular, you can move the camera of a layer to center it on an "
-          "object or a position.",
-          "Florian Rival",
-          "Open source (MIT License)")
-      .SetCategory("Camera")
+      .SetExtensionInformation("BuiltinCamera",
+                               _("Cameras and layers features"),
+                               _("Built-in camera extension"),
+                               "Florian Rival",
+                               "Open source (MIT License)")
      .SetExtensionHelpPath("/interface/scene-editor/layers-and-cameras");
-  extension.AddInstructionOrExpressionGroupMetadata(_("Layers and cameras"))
-      .SetIcon("res/conditions/camera24.png");
-  extension.AddInstructionOrExpressionGroupMetadata(_("Effects"))
-      .SetIcon("res/actions/effect24.png");
+
+#if defined(GD_IDE_ONLY)
+  extension
+      .AddCondition("CameraX",
+                    _("Camera center X position"),
+                    _("Compare the X position of the center of a camera."),
+                    _("the x position of camera _PARAM4_ (layer: _PARAM3_)"),
+                    _("Layers and cameras"),
+                    "res/conditions/camera24.png",
+                    "res/conditions/camera.png")
+      .AddCodeOnlyParameter("currentScene", "")
+      .UseStandardRelationalOperatorParameters("number")
+      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .SetDefaultValue("\"\"")
+      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
+      .SetDefaultValue("0")
+      .MarkAsAdvanced();

  extension
-      .AddExpressionAndConditionAndAction(
-          "number",
-          "CameraCenterX",
+      .AddCondition("CameraY",
+                    _("Camera center Y position"),
+                    _("Compare the Y position of the center of a camera."),
+                    _("the Y position of camera _PARAM4_ (layer: _PARAM3_)"),
+                    _("Layers and cameras"),
+                    "res/conditions/camera24.png",
+                    "res/conditions/camera.png")
+      .AddCodeOnlyParameter("currentScene", "")
+      .UseStandardRelationalOperatorParameters("number")
+      .AddParameter("layer", _("Layer (base layer if empty)"))
+      .SetDefaultValue("\"\"")
+      .AddParameter("expression", _("Camera number (default : 0)"))
+      .SetDefaultValue("0")
+      .MarkAsAdvanced();
+
+  extension
+      .AddAction(
+          "CameraX",
          _("Camera center X position"),
-          _("the X position of the center of a camera"),
-          _("the X position of camera _PARAM4_ (layer: _PARAM3_)"),
-          "",
-          "res/conditions/camera24.png")
+          _("Change the X position of the center of the specified camera."),
+          _("the x position of camera _PARAM4_ (layer: _PARAM3_)"),
+          _("Layers and cameras"),
+          "res/conditions/camera24.png",
+          "res/conditions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
-      .AddParameter("layer", _("Layer"), "", true)
+      .UseStandardOperatorParameters("number")
+      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
      .SetDefaultValue("\"\"")
      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
      .SetDefaultValue("0")
      .MarkAsAdvanced();

-  // Compatibility with GD <= 5.0.135
-  extension.AddDuplicatedCondition("CameraX", "CameraCenterX")
-      .SetHidden();  // Deprecated
-  extension.AddDuplicatedExpression("CameraX", "CameraCenterX")
-      .SetHidden();  // Deprecated
-  extension.AddDuplicatedAction("SetCameraX", "SetCameraCenterX")
-      .SetHidden();  // Deprecated
-
-  extension.AddDuplicatedAction("CameraX", "SetCameraX")
-      .SetHidden();  // Deprecated
-
-  extension.AddDuplicatedExpression("VueX", "CameraX")
-      .SetHidden();  // Deprecated
-  // end of compatibility code
-
  extension
-      .AddExpressionAndConditionAndAction(
-          "number",
-          "CameraCenterY",
+      .AddAction(
+          "CameraY",
          _("Camera center Y position"),
-          _("the Y position of the center of a camera"),
-          _("the Y position of camera _PARAM4_ (layer: _PARAM3_)"),
-          "",
-          "res/conditions/camera24.png")
+          _("Change the Y position of the center of the specified camera."),
+          _("the y position of camera _PARAM4_ (layer: _PARAM3_)"),
+          _("Layers and cameras"),
+          "res/conditions/camera24.png",
+          "res/conditions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
-      .AddParameter("layer", _("Layer"), "", true)
+      .UseStandardOperatorParameters("number")
+      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
      .SetDefaultValue("\"\"")
      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
      .SetDefaultValue("0")
      .MarkAsAdvanced();

-  // Compatibility with GD <= 5.0.135
-  extension.AddDuplicatedCondition("CameraY", "CameraCenterY")
-      .SetHidden();  // Deprecated
-  extension.AddDuplicatedExpression("CameraY", "CameraCenterY")
-      .SetHidden();  // Deprecated
-  extension.AddDuplicatedAction("SetCameraY", "SetCameraCenterY")
-      .SetHidden();  // Deprecated
-
-  extension.AddDuplicatedAction("CameraY", "SetCameraY")
-      .SetHidden();  // Deprecated
-
-  extension.AddDuplicatedExpression("VueY", "CameraY")
-      .SetHidden();  // Deprecated
-  // end of compatibility code
-
  extension
-      .AddExpressionAndCondition(
-          "number",
-          "CameraWidth",
-          _("Width of a camera"),
-          _("the width of a camera of a layer"),
-          _("the width of camera _PARAM2_ of layer _PARAM1_"),
-          "",
-          "res/conditions/camera24.png")
+      .AddCondition("CameraWidth",
+                    _("Width of a camera"),
+                    _("Test the width of a camera of a layer"),
+                    _("the width of camera _PARAM2_ of layer _PARAM1_"),
+                    _("Layers and cameras"),
+                    "res/conditions/camera24.png",
+                    "res/conditions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"), "", true)
+      .AddParameter("layer", _("Layer"))
      .SetDefaultValue("\"\"")
-      .AddParameter("expression", _("Camera number"), "", true)
-      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
+      .AddParameter("expression", _("Camera number"))
+      .UseStandardRelationalOperatorParameters("number")
      .MarkAsAdvanced();

  extension
-      .AddExpressionAndCondition(
-          "number",
-          "CameraHeight",
-          _("Height of a camera"),
-          _("the height of a camera of a layer"),
-          _("the height of camera _PARAM2_ of layer _PARAM1_"),
-          "",
-          "res/conditions/camera24.png")
+      .AddCondition("CameraHeight",
+                    _("Height of a camera"),
+                    _("Test the height of a camera of a layer"),
+                    _("the height of camera _PARAM2_ of layer _PARAM1_"),
+                    _("Layers and cameras"),
+                    "res/conditions/camera24.png",
+                    "res/conditions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"), "", true)
+      .AddParameter("layer", _("Layer (base layer if empty)"))
      .SetDefaultValue("\"\"")
-      .AddParameter("expression", _("Camera number"), "", true)
-      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
+      .AddParameter("expression", _("Camera number"))
+      .UseStandardRelationalOperatorParameters("number")
      .MarkAsAdvanced();

  extension
-      .AddExpressionAndCondition(
-          "number",
-          "CameraBorderLeft",
-          _("Camera left border position"),
-          _("the position of the left border of a camera"),
-          _("the position of the left border of camera _PARAM2_ of layer "
-            "_PARAM1_"),
-          "",
-          "res/conditions/camera24.png")
+      .AddCondition("CameraAngle",
+                    _("Angle of a camera of a layer"),
+                    _("Test a camera angle."),
+                    _("the angle of camera (layer: _PARAM3_, camera: _PARAM4_)"),
+                    _("Layers and cameras"),
+                    "res/conditions/camera24.png",
+                    "res/conditions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"), "", true)
-      .SetDefaultValue("\"\"")
-      .AddParameter("expression", _("Camera number"), "", true)
-      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
-      .MarkAsAdvanced();
-
-  extension
-      .AddExpressionAndCondition(
-          "number",
-          "CameraBorderRight",
-          _("Camera right border position"),
-          _("the position of the right border of a camera"),
-          _("the position of the right border of camera _PARAM2_ of layer "
-            "_PARAM1_"),
-          "",
-          "res/conditions/camera24.png")
-      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"), "", true)
-      .SetDefaultValue("\"\"")
-      .AddParameter("expression", _("Camera number"), "", true)
-      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
-      .MarkAsAdvanced();
-
-  extension
-      .AddExpressionAndCondition(
-          "number",
-          "CameraBorderTop",
-          _("Camera top border position"),
-          _("the position of the top border of a camera"),
-          _("the position of the top border of camera _PARAM2_ of layer "
-            "_PARAM1_"),
-          "",
-          "res/conditions/camera24.png")
-      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"), "", true)
-      .SetDefaultValue("\"\"")
-      .AddParameter("expression", _("Camera number"), "", true)
-      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
-      .MarkAsAdvanced();
-
-  extension
-      .AddExpressionAndCondition(
-          "number",
-          "CameraBorderBottom",
-          _("Camera bottom border position"),
-          _("the position of the bottom border of a camera"),
-          _("the position of the bottom border of camera _PARAM2_ of layer "
-            "_PARAM1_"),
-          "",
-          "res/conditions/camera24.png")
-      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"), "", true)
-      .SetDefaultValue("\"\"")
-      .AddParameter("expression", _("Camera number"), "", true)
-      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
-      .MarkAsAdvanced();
-
-  extension
-      .AddExpressionAndConditionAndAction(
-          "number",
-          "CameraAngle",
-          _("Angle of a camera of a layer"),
-          _("the angle of rotation of a camera (in degrees)"),
-          _("the angle of camera (layer: _PARAM3_, camera: _PARAM4_)"),
-          "",
-          "res/conditions/camera24.png")
-      .AddCodeOnlyParameter("currentScene", "")
-      .UseStandardParameters("number", ParameterOptions::MakeNewOptions())
-      .AddParameter("layer", _("Layer"), "", true)
+      .UseStandardRelationalOperatorParameters("number")
+      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
      .SetDefaultValue("\"\"")
      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
      .SetDefaultValue("0")
      .MarkAsAdvanced();

-  extension.AddDuplicatedAction("RotateCamera", "SetCameraAngle").SetHidden();
-  extension.AddDuplicatedExpression("CameraRotation", "CameraAngle")
-      .SetHidden();
-  extension.AddDuplicatedExpression("VueRotation", "CameraAngle").SetHidden();
+  extension
+      .AddAction("RotateCamera",
+                 _("Change camera angle"),
+                 _("This action modifies the angle of a camera in the "
+                   "specified layer."),
+                 _("the angle of camera (layer: _PARAM3_, camera: _PARAM4_)"),
+                 _("Layers and cameras"),
+                 "res/actions/camera24.png",
+                 "res/actions/camera.png")
+      .AddCodeOnlyParameter("currentScene", "")
+      .UseStandardOperatorParameters("number")
+      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
+      .SetDefaultValue("\"\"")
+      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
+      .SetDefaultValue("0");

  extension
      .AddAction("AddCamera",
                 _("Add a camera to a layer"),
                 _("This action adds a camera to a layer"),
                 _("Add a camera to layer _PARAM1_"),
-                 "",
+                 _("Layers and cameras"),
                 "res/actions/camera24.png",
                 "res/actions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"))
+      .AddParameter("layer", _("Layer (base layer if empty)"))
      .SetDefaultValue("\"\"")
      .AddParameter("expression", _("Width"), "", true)
      .AddParameter("expression", _("Height"), "", true)
@@ -255,11 +188,11 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                 _("Delete a camera of a layer"),
                 _("Remove the specified camera from a layer"),
                 _("Delete camera _PARAM2_ from layer _PARAM1_"),
-                 "",
+                 _("Layers and cameras"),
                 "res/actions/camera24.png",
                 "res/actions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"))
+      .AddParameter("layer", _("Layer (base layer if empty)"))
      .SetDefaultValue("\"\"")
      .AddParameter("expression", _("Camera number"))
      .MarkAsComplex();
@@ -271,11 +204,11 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                   "layer. The zoom will be reset."),
                 _("Change the size of camera _PARAM2_ of _PARAM1_ to "
                   "_PARAM3_*_PARAM4_"),
-                 "",
+                 _("Layers and cameras"),
                 "res/actions/camera24.png",
                 "res/actions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"))
+      .AddParameter("layer", _("Layer (base layer if empty)"))
      .SetDefaultValue("\"\"")
      .AddParameter("expression", _("Camera number"))
      .AddParameter("expression", _("Width"))
@@ -289,11 +222,11 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                   "specified layer."),
                 _("Set the render zone of camera _PARAM2_ from layer _PARAM1_ "
                   "to _PARAM3_;_PARAM4_ _PARAM5_;_PARAM6_"),
-                 "",
+                 _("Layers and cameras"),
                 "res/actions/camera24.png",
                 "res/actions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"))
+      .AddParameter("layer", _("Layer (base layer if empty)"))
      .SetDefaultValue("\"\"")
      .AddParameter("expression", _("Camera number"))
      .AddParameter(
@@ -312,22 +245,21 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(

  extension
      .AddAction("ZoomCamera",
-                 _("Camera zoom"),
                 _("Change camera zoom."),
-                 _("Change camera zoom to _PARAM1_ (layer: _PARAM2_, camera: "
+                 _("Change camera zoom."),
+                 _("Change camera zoom to _PARAM1_ (layer : _PARAM2_, camera : "
                   "_PARAM3_)"),
-                 "",
+                 _("Layers and cameras"),
                 "res/actions/camera24.png",
                 "res/actions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("expression",
                    _("Value (1:Initial zoom, 2:Zoom x2, 0.5:Unzoom x2...)"))
-      .AddParameter("layer", _("Layer"), "", true)
+      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
      .SetDefaultValue("\"\"")
      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
      .SetDefaultValue("0");

-  // TODO Deprecated: hide this action in a future release.
  extension
      .AddAction(
          "FixCamera",
@@ -336,7 +268,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
            "specified limits."),
          _("Center the camera on _PARAM1_ (limit : from _PARAM2_;_PARAM3_ to "
            "_PARAM4_;_PARAM5_) (layer: _PARAM7_, camera: _PARAM8_)"),
-          "",
+          _("Layers and cameras"),
          "res/actions/camera24.png",
          "res/actions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
@@ -354,41 +286,21 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                    "",
                    true)
      .SetDefaultValue("yes")
-      .AddParameter("layer", _("Layer"), "", true)
+      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
      .SetDefaultValue("\"\"")
      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
      .SetDefaultValue("0")
      .MarkAsAdvanced();

  extension
-      .AddAction("ClampCamera",
-                 _("Enforce camera boundaries"),
-                 _("Enforce camera boundaries by moving the camera back inside "
-                   "specified boundaries."),
-                 _("Enforce camera boundaries (left: _PARAM1_, top: _PARAM2_ "
-                   "right: _PARAM3_, bottom: _PARAM4_, layer: _PARAM5_)"),
-                 "",
-                 "res/actions/camera24.png",
-                 "res/actions/camera.png")
-      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("expression", _("Left bound X Position"))
-      .AddParameter("expression", _("Top bound Y Position"))
-      .AddParameter("expression", _("Right bound X Position"))
-      .AddParameter("expression", _("Bottom bound Y Position"))
-      .AddParameter("layer", _("Layer"), "", true)
-      .SetDefaultValue("\"\"")
-      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
-      .SetDefaultValue("0")
-      .MarkAsAdvanced();
-
-  extension
-      .AddAction("CentreCamera",
-                 _("Center the camera on an object"),
-                 _("Center the camera on the specified object."),
-                 _("Center camera on _PARAM1_ (layer: _PARAM3_)"),
-                 "",
-                 "res/actions/camera24.png",
-                 "res/actions/camera.png")
+      .AddAction(
+          "CentreCamera",
+          _("Center the camera on an object"),
+          _("Center the camera on the specified object."),
+          _("Center camera on _PARAM1_ (layer: _PARAM3_, camera: _PARAM4_)"),
+          _("Layers and cameras"),
+          "res/actions/camera24.png",
+          "res/actions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("objectPtr", _("Object"))
      .AddParameter("yesorno",
@@ -396,7 +308,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                    "",
                    true)
      .SetDefaultValue("yes")
-      .AddParameter("layer", _("Layer"), "", true)
+      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
      .SetDefaultValue("\"\"")
      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
      .SetDefaultValue("0")
@@ -407,11 +319,11 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                 _("Show a layer"),
                 _("Show a layer."),
                 _("Show layer _PARAM1_"),
-                 "",
+                 _("Layers and cameras"),
                 "res/actions/layer24.png",
                 "res/actions/layer.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"))
+      .AddParameter("layer", _("Layer (base layer if empty)"))
      .SetDefaultValue("\"\"")
      .MarkAsAdvanced();

@@ -420,11 +332,11 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                 _("Hide a layer"),
                 _("Hide a layer."),
                 _("Hide layer _PARAM1_"),
-                 "",
+                 _("Layers and cameras"),
                 "res/actions/layer24.png",
                 "res/actions/layer.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"))
+      .AddParameter("layer", _("Layer (base layer if empty)"))
      .SetDefaultValue("\"\"")
      .MarkAsAdvanced();

@@ -433,69 +345,69 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                    _("Visibility of a layer"),
                    _("Test if a layer is set as visible."),
                    _("Layer _PARAM1_ is visible"),
-                    "",
+                    _("Layers and cameras"),
                    "res/conditions/layer24.png",
                    "res/conditions/layer.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"))
+      .AddParameter("layer", _("Layer (base layer if empty)"))
      .SetDefaultValue("\"\"")
      .MarkAsAdvanced();

  extension
      .AddAction(
          "SetLayerEffectParameter",
-          _("Effect property (number)"),
-          _("Change the value of a property of an effect.") + "\n" +
-              _("You can find the property names (and change the effect "
+          _("Effect parameter (number)"),
+          _("Change the value of a parameter of an effect.") + "\n" +
+              _("You can find the parameter names (and change the effect "
                "names) in the effects window."),
          _("Set _PARAM3_ to _PARAM4_ for effect _PARAM2_ of layer _PARAM1_"),
-          _("Effects"),
-          "res/actions/effect24.png",
-          "res/actions/effect.png")
+          _("Layers and cameras/Effects"),
+          "res/conditions/camera24.png",
+          "res/conditions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"), "", true)
+      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
      .SetDefaultValue("\"\"")
-      .AddParameter("layerEffectName", _("Effect name"))
-      .AddParameter("layerEffectParameterName", _("Property name"))
+      .AddParameter("string", _("Effect"))
+      .AddParameter("string", _("Parameter name"))
      .AddParameter("expression", _("New value"))
      .MarkAsAdvanced();

  extension
      .AddAction(
          "SetLayerEffectStringParameter",
-          _("Effect property (string)"),
-          _("Change the value (string) of a property of an effect.") + "\n" +
-              _("You can find the property names (and change the effect "
+          _("Effect parameter (string)"),
+          _("Change the value (string) of a parameter of an effect.") + "\n" +
+              _("You can find the parameter names (and change the effect "
                "names) in the effects window."),
          _("Set _PARAM3_ to _PARAM4_ for effect _PARAM2_ of layer _PARAM1_"),
-          _("Effects"),
-          "res/actions/effect24.png",
-          "res/actions/effect.png")
+          _("Layers and cameras/Effects"),
+          "res/conditions/camera24.png",
+          "res/conditions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"), "", true)
+      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
      .SetDefaultValue("\"\"")
-      .AddParameter("layerEffectName", _("Effect name"))
-      .AddParameter("layerEffectParameterName", _("Property name"))
+      .AddParameter("string", _("Effect"))
+      .AddParameter("string", _("Parameter name"))
      .AddParameter("string", _("New value"))
      .MarkAsAdvanced();

  extension
      .AddAction(
          "SetLayerEffectBooleanParameter",
-          _("Effect property (enable or disable)"),
-          _("Enable or disable a property of an effect.") + "\n" +
-              _("You can find the property names (and change the effect "
+          _("Effect parameter (enable or disable)"),
+          _("Enable or disable a parameter of an effect.") + "\n" +
+              _("You can find the parameter names (and change the effect "
                "names) in the effects window."),
          _("Enable _PARAM3_ for effect _PARAM2_ of layer _PARAM1_: _PARAM4_"),
-          _("Effects"),
-          "res/actions/effect24.png",
-          "res/actions/effect.png")
+          _("Layers and cameras/Effects"),
+          "res/conditions/camera24.png",
+          "res/conditions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"), "", true)
+      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
      .SetDefaultValue("\"\"")
-      .AddParameter("layerEffectName", _("Effect name"))
-      .AddParameter("layerEffectParameterName", _("Property name"))
-      .AddParameter("yesorno", _("Enable this property"))
+      .AddParameter("string", _("Effect"))
+      .AddParameter("string", _("Parameter name"))
+      .AddParameter("yesorno", _("Enable this parameter"))
      .MarkAsAdvanced();

  extension
@@ -503,13 +415,13 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                    _("Layer effect is enabled"),
                    _("The effect on a layer is enabled"),
                    _("Effect _PARAM2_ on layer _PARAM1_ is enabled"),
-                    _(""),
-                    "res/actions/effect24.png",
-                    "res/actions/effect.png")
+                    _("Layers and cameras/Effects"),
+                    "res/conditions/camera24.png",
+                    "res/conditions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"), "", true)
+      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
      .SetDefaultValue("\"\"")
-      .AddParameter("layerEffectName", _("Effect name"))
+      .AddParameter("string", _("Effect"))
      .MarkAsAdvanced();

  extension
@@ -517,13 +429,13 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
                 _("Enable layer effect"),
                 _("Enable an effect on a layer"),
                 _("Enable effect _PARAM2_ on layer _PARAM1_: _PARAM3_"),
-                 _("Effects"),
-                 "res/actions/effect24.png",
-                 "res/actions/effect.png")
+                 _("Layers and cameras/Effects"),
+                 "res/conditions/camera24.png",
+                 "res/conditions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"), "", true)
+      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
      .SetDefaultValue("\"\"")
-      .AddParameter("layerEffectName", _("Effect name"))
+      .AddParameter("string", _("Effect"))
      .AddParameter("yesorno", _("Enable"), "", true)
      .MarkAsAdvanced();

@@ -533,16 +445,13 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
          _("Layer time scale"),
          _("Compare the time scale applied to the objects of the layer."),
          _("the time scale of layer _PARAM1_"),
-          "",
+          _("Layers and cameras/Time"),
          "res/conditions/time24.png",
          "res/conditions/time.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"), "", true)
+      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
      .SetDefaultValue("\"\"")
-      .UseStandardRelationalOperatorParameters(
-          "number",
-          gd::ParameterOptions::MakeNewOptions().SetDescription(
-              _("Time scale (1 by default)")))
+      .UseStandardRelationalOperatorParameters("number")
      .MarkAsAdvanced();

  extension
@@ -550,69 +459,44 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
          "ChangeLayerTimeScale",
          _("Change layer time scale"),
          _("Change the time scale applied to the objects of the layer."),
-          _("Set the time scale of layer _PARAM1_ to _PARAM2_"),
-          "",
+          _("Set time scale of layer _PARAM1_ to _PARAM2_"),
+          _("Layers and cameras/Time"),
          "res/actions/time24.png",
          "res/actions/time.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"), "", true)
+      .AddParameter("layer", _("Layer (base layer if empty)"), "", true)
      .SetDefaultValue("\"\"")
      .AddParameter("expression",
                    _("Scale (1: Default, 2: 2x faster, 0.5: 2x slower...)"));

  extension
-      .AddCondition("LayerDefaultZOrder",
-                    _("Layer default Z order"),
-                    _("Compare the default Z order set to objects when they "
-                      "are created on a layer."),
-                    _("the default Z order of objects created on _PARAM1_"),
-                    "",
-                    "res/conditions/layer24.png",
-                    "res/conditions/layer.png")
+      .AddExpression("CameraWidth",
+                     _("Width of a camera of a layer"),
+                     _("Width of a camera of a layer"),
+                     _("Layers and cameras"),
+                     "res/actions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"), "", true)
-      .SetDefaultValue("\"\"")
-      .UseStandardRelationalOperatorParameters(
-          "number", gd::ParameterOptions::MakeNewOptions())
-      .MarkAsAdvanced();
+      .AddParameter("layer", _("Layer"))
+      .AddParameter("expression", _("Camera number (default : 0)"))
+      .SetDefaultValue("0");

  extension
-      .AddAction("SetLayerDefaultZOrder",
-                 _("Layer default Z order"),
-                 _("Change the default Z order set to objects when they are "
-                   "created on a layer."),
-                 _("Set the default Z order of objects created on _PARAM1_ to "
-                   "_PARAM2_"),
-                 "",
-                 "res/actions/layer24.png",
-                 "res/actions/layer.png")
+      .AddExpression("CameraHeight",
+                     _("Height of a camera of a layer"),
+                     _("Height of a camera of a layer"),
+                     _("Layers and cameras"),
+                     "res/actions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"), "", true)
-      .SetDefaultValue("\"\"")
-      .AddParameter("expression", _("New default Z order"));
-
-  extension
-      .AddAction(
-          "SetLayerAmbientLightColor",
-          _("Set the ambient light color"),
-          _("Set the ambient light color of the lighting layer in format "
-            "\"R;G;B\" string."),
-          _("Set the ambient color of the lighting layer _PARAM1_ to _PARAM2_"),
-          _(""),
-          "res/actions/color24.png",
-          "res/actions/color.png")
-      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"), "", true)
-      .SetDefaultValue("\"Lighting\"")
-      .AddParameter("color", _("Color"))
-      .MarkAsAdvanced();
+      .AddParameter("layer", _("Layer"))
+      .AddParameter("expression", _("Camera number (default : 0)"))
+      .SetDefaultValue("0");

  extension
      .AddExpression(
          "CameraViewportLeft",
          _("X position of the top left side point of a render zone"),
          _("X position of the top left side point of a render zone"),
-          "",
+          _("Layers and cameras"),
          "res/actions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("layer", _("Layer"))
@@ -624,7 +508,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
          "CameraViewportTop",
          _("Y position of the top left side point of a render zone"),
          _("Y position of the top left side point of a render zone"),
-          "",
+          _("Layers and cameras"),
          "res/actions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("layer", _("Layer"))
@@ -636,7 +520,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
          "CameraViewportRight",
          _("X position of the bottom right side point of a render zone"),
          _("X position of the bottom right side point of a render zone"),
-          "",
+          _("Layers and cameras"),
          "res/actions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("layer", _("Layer"))
@@ -648,7 +532,7 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
          "CameraViewportBottom",
          _("Y position of the bottom right side point of a render zone"),
          _("Y position of the bottom right side point of a render zone"),
-          "",
+          _("Layers and cameras"),
          "res/actions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("layer", _("Layer"))
@@ -656,10 +540,10 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
      .SetDefaultValue("0");

  extension
-      .AddExpression("CameraZoom",
-                     _("Zoom of a camera of a layer"),
-                     _("Zoom of a camera of a layer"),
-                     "",
+      .AddExpression("CameraX",
+                     _("Camera X position"),
+                     _("Camera X position"),
+                     _("Layers and cameras"),
                     "res/actions/camera.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("layer", _("Layer"), "", true)
@@ -667,23 +551,78 @@ void GD_CORE_API BuiltinExtensionsImplementer::ImplementsCameraExtension(
      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
      .SetDefaultValue("0");

+  extension
+      .AddExpression("VueX",
+                     _("Camera X position"),
+                     _("Camera X position"),
+                     _("Layers and cameras"),
+                     "res/actions/camera.png")
+      .SetHidden()
+      .AddCodeOnlyParameter("currentScene", "")
+      .AddParameter("layer", _("Layer"), "", true)
+      .SetDefaultValue("\"\"")
+      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
+      .SetDefaultValue("0");
+
+  extension
+      .AddExpression("CameraY",
+                     _("Camera Y position"),
+                     _("Camera Y position"),
+                     _("Layers and cameras"),
+                     "res/actions/camera.png")
+      .AddCodeOnlyParameter("currentScene", "")
+      .AddParameter("layer", _("Layer"), "", true)
+      .SetDefaultValue("\"\"")
+      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
+      .SetDefaultValue("0");
+
+  extension
+      .AddExpression("VueY",
+                     _("Camera Y position"),
+                     _("Camera Y position"),
+                     _("Layers and cameras"),
+                     "res/actions/camera.png")
+      .SetHidden()
+      .AddCodeOnlyParameter("currentScene", "")
+      .AddParameter("layer", _("Layer"), "", true)
+      .SetDefaultValue("\"\"")
+      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
+      .SetDefaultValue("0");
+
+  extension
+      .AddExpression("CameraRotation",
+                     _("Angle of a camera of a layer"),
+                     _("Angle of a camera of a layer"),
+                     _("Layers and cameras"),
+                     "res/actions/camera.png")
+      .AddCodeOnlyParameter("currentScene", "")
+      .AddParameter("layer", _("Layer"), "", true)
+      .SetDefaultValue("\"\"")
+      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
+      .SetDefaultValue("0");
+
+  extension
+      .AddExpression("VueRotation",
+                     _("Angle of a camera of a layer"),
+                     _("Angle of a camera of a layer"),
+                     _("Layers and cameras"),
+                     "res/actions/camera.png")
+      .SetHidden()
+      .AddCodeOnlyParameter("currentScene", "")
+      .AddParameter("layer", _("Layer"), "", true)
+      .SetDefaultValue("\"\"")
+      .AddParameter("expression", _("Camera number (default : 0)"), "", true)
+      .SetDefaultValue("0");
+
  extension
      .AddExpression("LayerTimeScale",
-                     _("Layer time scale"),
-                     _("Returns the time scale of the specified layer."),
-                     "",
+                     _("Time scale"),
+                     _("Time scale"),
+                     _("Layers and cameras"),
                     "res/actions/time.png")
      .AddCodeOnlyParameter("currentScene", "")
      .AddParameter("layer", _("Layer"));
-
-  extension
-      .AddExpression("LayerDefaultZOrder",
-                     _("Default Z Order for a layer"),
-                     _("Default Z Order for a layer"),
-                     "",
-                     "res/actions/camera.png")
-      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("layer", _("Layer"));
+#endif
 }

 }  // namespace gd
--- a/Core/GDCore/Extensions/Builtin/Capabilities/AnimatableExtension.cpp
+++ b/Core/GDCore/Extensions/Builtin/Capabilities/AnimatableExtension.cpp
@@ -1,135 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the GNU Lesser General Public
- * License.
- */
-#include "GDCore/Extensions/Builtin/AllBuiltinExtensions.h"
-#include "GDCore/Extensions/Metadata/MultipleInstructionMetadata.h"
-#include "GDCore/Project/Behavior.h"
-#include "GDCore/Project/BehaviorsSharedData.h"
-#include "GDCore/Project/Object.h"
-#include "GDCore/Tools/Localization.h"
-
-using namespace std;
-namespace gd {
-
-void GD_CORE_API BuiltinExtensionsImplementer::ImplementsAnimatableExtension(
-    gd::PlatformExtension& extension) {
-  extension
-      .SetExtensionInformation("AnimatableCapability",
-                               _("Animatable capability"),
-                               _("Animate objects."),
-                               "Florian Rival",
-                               "Open source (MIT License)")
-      .SetExtensionHelpPath("/objects");
-  extension.AddInstructionOrExpressionGroupMetadata(_("Animations and images"))
-      .SetIcon("res/actions/animation24.png");
-
-  gd::BehaviorMetadata& aut = extension.AddBehavior(
-      "AnimatableBehavior",
-      _("Animatable capability"),
-      "Animation",
-      _("Animate objects."),
-      "",
-      "res/actions/animation24.png",
-      "AnimatableBehavior",
-      std::make_shared<gd::Behavior>(),
-      std::make_shared<gd::BehaviorsSharedData>())
-    .SetHidden();
-
-  aut.AddExpressionAndConditionAndAction(
-         "number",
-         "Index",
-         _("Animation (by number)"),
-         _("the number of the animation played by the object (the number from "
-           "the animations list)"),
-         _("the number of the animation"),
-         _("Animations and images"),
-         "res/actions/animation24.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "AnimatableBehavior")
-      .UseStandardParameters(
-          "number", gd::ParameterOptions::MakeNewOptions().SetDescription(
-                        _("Animation index")))
-      .MarkAsSimple();
-
-  aut.AddExpressionAndConditionAndAction(
-         "string",
-         "Name",
-         _("Animation (by name)"),
-         _("the animation played by the object using the name of the "
-           "animation"),
-         _("the animation"),
-         _("Animations and images"),
-         "res/actions/animation24.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "AnimatableBehavior")
-      .UseStandardParameters(
-          "objectAnimationName", gd::ParameterOptions::MakeNewOptions().SetDescription(
-                        _("Animation name")))
-      .MarkAsSimple();
-
-  aut.AddScopedAction("PauseAnimation",
-                _("Pause the animation"),
-                _("Pause the animation of the object."),
-                _("Pause the animation of _PARAM0_"),
-                _("Animations and images"),
-                "res/actions/animation24.png",
-                "res/actions/animation.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "AnimatableBehavior")
-      .MarkAsSimple();
-
-  aut.AddScopedAction("PlayAnimation",
-                _("Resume the animation"),
-                _("Resume the animation of the object."),
-                _("Resume the animation of _PARAM0_"),
-                _("Animations and images"),
-                "res/actions/animation24.png",
-                "res/actions/animation.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "AnimatableBehavior")
-      .MarkAsSimple();
-
-  aut.AddExpressionAndConditionAndAction(
-         "number",
-         "SpeedScale",
-         _("Animation speed scale"),
-         _("the animation speed scale (1 = the default speed, >1 = faster and "
-           "<1 = slower)"),
-         _("the animation speed scale"),
-         _("Animations and images"),
-         "res/actions/animation24.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "AnimatableBehavior")
-      .UseStandardParameters(
-          "number", gd::ParameterOptions::MakeNewOptions().SetDescription(
-                        _("Speed scale")))
-      .MarkAsSimple();
-
-  aut.AddScopedCondition("IsAnimationPaused",
-                   _("Animation paused"),
-                   _("Check if the animation of an object is paused."),
-                   _("The animation of _PARAM0_ is paused"),
-                   _("Animations and images"),
-                   "res/conditions/animation24.png",
-                   "res/conditions/animation.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "AnimatableBehavior")
-      .MarkAsSimple();
-
-  aut.AddScopedCondition("HasAnimationEnded",
-                   _("Animation finished"),
-                   _("Check if the animation being played by the Sprite object "
-                     "is finished."),
-                   _("The animation of _PARAM0_ is finished"),
-                   _("Animations and images"),
-                   "res/conditions/animation24.png",
-                   "res/conditions/animation.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "AnimatableBehavior")
-      .MarkAsSimple();
-}
-
-}  // namespace gd
--- a/Core/GDCore/Extensions/Builtin/Capabilities/EffectExtension.cpp
+++ b/Core/GDCore/Extensions/Builtin/Capabilities/EffectExtension.cpp
@@ -1,116 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the GNU Lesser General Public
- * License.
- */
-#include "GDCore/Extensions/Builtin/AllBuiltinExtensions.h"
-#include "GDCore/Extensions/Metadata/MultipleInstructionMetadata.h"
-#include "GDCore/Project/Behavior.h"
-#include "GDCore/Project/BehaviorsSharedData.h"
-#include "GDCore/Project/Object.h"
-#include "GDCore/Tools/Localization.h"
-
-using namespace std;
-namespace gd {
-
-void GD_CORE_API BuiltinExtensionsImplementer::ImplementsEffectExtension(
-    gd::PlatformExtension& extension) {
-  extension
-      .SetExtensionInformation("EffectCapability",
-                               _("Effect capability"),
-                               _("Apply visual effects to objects."),
-                               "Florian Rival",
-                               "Open source (MIT License)")
-      .SetExtensionHelpPath("/objects");
-  extension.AddInstructionOrExpressionGroupMetadata(_("Effects"))
-      .SetIcon("res/actions/effect24.png");
-
-  gd::BehaviorMetadata& aut = extension.AddBehavior(
-      "EffectBehavior",
-      _("Effect capability"),
-      "Effect",
-      _("Apply visual effects to objects."),
-      "",
-      "res/actions/effect24.png",
-      "EffectBehavior",
-      std::make_shared<gd::Behavior>(),
-      std::make_shared<gd::BehaviorsSharedData>())
-    .SetHidden();
-
-  aut.AddScopedAction("EnableEffect",
-                _("Enable an object effect"),
-                _("Enable an effect on the object"),
-                _("Enable effect _PARAM2_ on _PARAM0_: _PARAM3_"),
-                _("Effects"),
-                "res/actions/effect24.png",
-                "res/actions/effect.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "EffectBehavior")
-      .AddParameter("objectEffectName", _("Effect name"))
-      .AddParameter("yesorno", _("Enable?"))
-      .MarkAsSimple();
-
-  aut.AddScopedAction("SetEffectDoubleParameter",
-                _("Effect property (number)"),
-                _("Change the value of a property of an effect.") + "\n" +
-                    _("You can find the property names (and change the effect "
-                      "names) in the effects window."),
-                _("Set _PARAM3_ to _PARAM4_ for effect _PARAM2_ of _PARAM0_"),
-                _("Effects"),
-                "res/actions/effect24.png",
-                "res/actions/effect.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "EffectBehavior")
-      .AddParameter("objectEffectName", _("Effect name"))
-      .AddParameter("objectEffectParameterName", _("Property name"))
-      .AddParameter("expression", _("New value"))
-      .MarkAsSimple();
-
-  aut.AddScopedAction("SetEffectStringParameter",
-                _("Effect property (string)"),
-                _("Change the value (string) of a property of an effect.") +
-                    "\n" +
-                    _("You can find the property names (and change the effect "
-                      "names) in the effects window."),
-                _("Set _PARAM3_ to _PARAM4_ for effect _PARAM2_ of _PARAM0_"),
-                _("Effects"),
-                "res/actions/effect24.png",
-                "res/actions/effect.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "EffectBehavior")
-      .AddParameter("objectEffectName", _("Effect name"))
-      .AddParameter("objectEffectParameterName", _("Property name"))
-      .AddParameter("string", _("New value"))
-      .MarkAsSimple();
-
-  aut.AddScopedAction("SetEffectBooleanParameter",
-                _("Effect property (enable or disable)"),
-                _("Enable or disable a property of an effect.") + "\n" +
-                    _("You can find the property names (and change the effect "
-                      "names) in the effects window."),
-                _("Enable _PARAM3_ for effect _PARAM2_ of _PARAM0_: _PARAM4_"),
-                _("Effects"),
-                "res/actions/effect24.png",
-                "res/actions/effect.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "EffectBehavior")
-      .AddParameter("objectEffectName", _("Effect name"))
-      .AddParameter("objectEffectParameterName", _("Property name"))
-      .AddParameter("yesorno", _("Enable this property"))
-      .MarkAsSimple();
-
-  aut.AddScopedCondition("IsEffectEnabled",
-                   _("Effect is enabled"),
-                   _("Check if the effect on an object is enabled."),
-                   _("Effect _PARAM2_ of _PARAM0_ is enabled"),
-                   _("Effects"),
-                   "res/actions/effect24.png",
-                   "res/actions/effect.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "EffectBehavior")
-      .AddParameter("objectEffectName", _("Effect name"))
-      .MarkAsSimple();
-}
-
-}  // namespace gd
--- a/Core/GDCore/Extensions/Builtin/Capabilities/FlippableExtension.cpp
+++ b/Core/GDCore/Extensions/Builtin/Capabilities/FlippableExtension.cpp
@@ -1,86 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the GNU Lesser General Public
- * License.
- */
-#include "GDCore/Extensions/Builtin/AllBuiltinExtensions.h"
-#include "GDCore/Extensions/Metadata/MultipleInstructionMetadata.h"
-#include "GDCore/Project/Behavior.h"
-#include "GDCore/Project/BehaviorsSharedData.h"
-#include "GDCore/Project/Object.h"
-#include "GDCore/Tools/Localization.h"
-
-using namespace std;
-namespace gd {
-
-void GD_CORE_API BuiltinExtensionsImplementer::ImplementsFlippableExtension(
-    gd::PlatformExtension& extension) {
-  extension
-      .SetExtensionInformation("FlippableCapability",
-                               _("Flippable capability"),
-                               _("Flip objects."),
-                               "Florian Rival",
-                               "Open source (MIT License)")
-      .SetExtensionHelpPath("/objects");
-  extension.AddInstructionOrExpressionGroupMetadata(_("Effects"))
-      .SetIcon("res/actions/effect24.png");
-
-  gd::BehaviorMetadata& aut = extension.AddBehavior(
-      "FlippableBehavior",
-      _("Flippable capability"),
-      "Flippable",
-      _("Flip objects."),
-      "",
-      "res/actions/flipX24.png",
-      "FlippableBehavior",
-      std::make_shared<gd::Behavior>(),
-      std::make_shared<gd::BehaviorsSharedData>())
-    .SetHidden();
-
-  aut.AddScopedAction("FlipX",
-                _("Flip the object horizontally"),
-                _("Flip the object horizontally"),
-                _("Flip horizontally _PARAM0_: _PARAM2_"),
-                _("Effects"),
-                "res/actions/flipX24.png",
-                "res/actions/flipX.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "FlippableBehavior")
-      .AddParameter("yesorno", _("Activate flipping"))
-      .MarkAsSimple();
-
-  aut.AddScopedAction("FlipY",
-                _("Flip the object vertically"),
-                _("Flip the object vertically"),
-                _("Flip vertically _PARAM0_: _PARAM2_"),
-                _("Effects"),
-                "res/actions/flipY24.png",
-                "res/actions/flipY.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "FlippableBehavior")
-      .AddParameter("yesorno", _("Activate flipping"))
-      .MarkAsSimple();
-
-  aut.AddScopedCondition("FlippedX",
-                   _("Horizontally flipped"),
-                   _("Check if the object is horizontally flipped"),
-                   _("_PARAM0_ is horizontally flipped"),
-                   _("Effects"),
-                   "res/actions/flipX24.png",
-                   "res/actions/flipX.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "FlippableBehavior");
-
-  aut.AddScopedCondition("FlippedY",
-                   _("Vertically flipped"),
-                   _("Check if the object is vertically flipped"),
-                   _("_PARAM0_ is vertically flipped"),
-                   _("Effects"),
-                   "res/actions/flipY24.png",
-                   "res/actions/flipY.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "FlippableBehavior");
-}
-
-}  // namespace gd
--- a/Core/GDCore/Extensions/Builtin/Capabilities/OpacityExtension.cpp
+++ b/Core/GDCore/Extensions/Builtin/Capabilities/OpacityExtension.cpp
@@ -1,59 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the GNU Lesser General Public
- * License.
- */
-#include "GDCore/Extensions/Builtin/AllBuiltinExtensions.h"
-#include "GDCore/Extensions/Metadata/MultipleInstructionMetadata.h"
-#include "GDCore/Project/Behavior.h"
-#include "GDCore/Project/BehaviorsSharedData.h"
-#include "GDCore/Project/Object.h"
-#include "GDCore/Tools/Localization.h"
-
-using namespace std;
-namespace gd {
-
-void GD_CORE_API BuiltinExtensionsImplementer::ImplementsOpacityExtension(
-    gd::PlatformExtension& extension) {
-  extension
-      .SetExtensionInformation("OpacityCapability",
-                               _("Opacity capability"),
-                               _("Change the object opacity."),
-                               "Florian Rival",
-                               "Open source (MIT License)")
-      .SetExtensionHelpPath("/objects");
-  extension.AddInstructionOrExpressionGroupMetadata(_("Visibility"))
-      .SetIcon("res/actions/opacity24.png");
-
-  gd::BehaviorMetadata& aut = extension.AddBehavior(
-      "OpacityBehavior",
-      _("Opacity capability"),
-      "Opacity",
-      _("Change the object opacity."),
-      "",
-      "res/actions/opacity24.png",
-      "OpacityBehavior",
-      std::make_shared<gd::Behavior>(),
-      std::make_shared<gd::BehaviorsSharedData>())
-    .SetHidden();
-
-  aut.AddExpressionAndConditionAndAction(
-         "number",
-         "Value",
-         _("Opacity"),
-         _("the opacity of an object, between 0 (fully transparent) to 255 "
-           "(opaque)"),
-         _("the opacity"),
-         _("Visibility"),
-         "res/actions/opacity24.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "OpacityBehavior")
-      .UseStandardParameters(
-          "number", gd::ParameterOptions::MakeNewOptions().SetDescription(
-                        _("Opacity (0-255)")))
-      .SetFunctionName("setOpacity")
-      .SetGetter("getOpacity");
-}
-
-}  // namespace gd
--- a/Core/GDCore/Extensions/Builtin/Capabilities/ResizableExtension.cpp
+++ b/Core/GDCore/Extensions/Builtin/Capabilities/ResizableExtension.cpp
@@ -1,112 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the GNU Lesser General Public
- * License.
- */
-#include "GDCore/Extensions/Builtin/AllBuiltinExtensions.h"
-#include "GDCore/Project/Behavior.h"
-#include "GDCore/Project/BehaviorsSharedData.h"
-#include "GDCore/Project/Object.h"
-#include "GDCore/Tools/Localization.h"
-
-using namespace std;
-namespace gd {
-
-void GD_CORE_API BuiltinExtensionsImplementer::ImplementsResizableExtension(
-    gd::PlatformExtension &extension) {
-  extension
-      .SetExtensionInformation("ResizableCapability",
-                               _("Resizable capability"),
-                               _("Change the object dimensions."),
-                               "Florian Rival",
-                               "Open source (MIT License)")
-      .SetExtensionHelpPath("/objects");
-  extension.AddInstructionOrExpressionGroupMetadata(_("Size")).SetIcon(
-      "res/actions/scale24_black.png");
-
-  gd::BehaviorMetadata &aut =
-      extension
-          .AddBehavior("ResizableBehavior",
-                       _("Resizable capability"),
-                       "Resizable",
-                       _("Change the object dimensions."),
-                       "",
-                       "res/actions/scale24_black.png",
-                       "ResizableBehavior",
-                       std::make_shared<gd::Behavior>(),
-                       std::make_shared<gd::BehaviorsSharedData>())
-          .SetHidden();
-
-  aut.AddScopedAction("SetWidth",
-                      _("Width"),
-                      _("Change the width of the object."),
-                      _("the width"),
-                      _("Size"),
-                      "res/actions/scaleWidth24_black.png",
-                      "res/actions/scaleWidth_black.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "ResizableBehavior")
-      .UseStandardOperatorParameters(
-          "number",
-          ParameterOptions::MakeNewOptions().SetDescription(_("Width")))
-      .MarkAsAdvanced();
-
-  aut.AddScopedCondition("Width",
-                         _("Width"),
-                         _("Compare the width of the object."),
-                         _("the width"),
-                         _("Size"),
-                         "res/conditions/scaleWidth24_black.png",
-                         "res/conditions/scaleWidth_black.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "ResizableBehavior")
-      .UseStandardRelationalOperatorParameters(
-          "number",
-          ParameterOptions::MakeNewOptions().SetDescription(_("Width")))
-      .MarkAsAdvanced();
-
-  aut.AddScopedAction("SetHeight",
-                      _("Height"),
-                      _("Change the height of the object."),
-                      _("the height"),
-                      _("Size"),
-                      "res/actions/scaleHeight24_black.png",
-                      "res/actions/scaleHeight_black.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "ResizableBehavior")
-      .UseStandardOperatorParameters(
-          "number",
-          ParameterOptions::MakeNewOptions().SetDescription(_("Height")))
-      .MarkAsAdvanced();
-
-  aut.AddScopedCondition("Height",
-                         _("Height"),
-                         _("Compare the height of the object."),
-                         _("the height"),
-                         _("Size"),
-                         "res/conditions/scaleHeight24_black.png",
-                         "res/conditions/scaleHeight_black.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "ResizableBehavior")
-      .UseStandardRelationalOperatorParameters(
-          "number",
-          ParameterOptions::MakeNewOptions().SetDescription(_("Height")))
-      .MarkAsAdvanced();
-
-  aut.AddScopedAction(
-         "SetSize",
-         _("Size"),
-         _("Change the size of an object."),
-         _("Change the size of _PARAM0_: set to _PARAM2_ x _PARAM3_"),
-         _("Size"),
-         "res/actions/scale24_black.png",
-         "res/actions/scale_black.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "ResizableBehavior")
-      .AddParameter("expression", _("Width"))
-      .AddParameter("expression", _("Height"))
-      .MarkAsAdvanced();
-}
-
-}  // namespace gd
--- a/Core/GDCore/Extensions/Builtin/Capabilities/ScalableExtension.cpp
+++ b/Core/GDCore/Extensions/Builtin/Capabilities/ScalableExtension.cpp
@@ -1,90 +0,0 @@
-/*
- * GDevelop Core
- * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
- * reserved. This project is released under the GNU Lesser General Public
- * License.
- */
-#include "GDCore/Extensions/Builtin/AllBuiltinExtensions.h"
-#include "GDCore/Extensions/Metadata/MultipleInstructionMetadata.h"
-#include "GDCore/Project/Behavior.h"
-#include "GDCore/Project/BehaviorsSharedData.h"
-#include "GDCore/Project/Object.h"
-#include "GDCore/Tools/Localization.h"
-
-using namespace std;
-namespace gd {
-
-void GD_CORE_API BuiltinExtensionsImplementer::ImplementsScalableExtension(
-    gd::PlatformExtension& extension) {
-  extension
-      .SetExtensionInformation("ScalableCapability",
-                               _("Scalable capability"),
-                               _("Change the object scale."),
-                               "Florian Rival",
-                               "Open source (MIT License)")
-      .SetExtensionHelpPath("/objects");
-  extension.AddInstructionOrExpressionGroupMetadata(_("Size"))
-      .SetIcon("res/actions/scale24_black.png");
-
-  gd::BehaviorMetadata& aut = extension.AddBehavior(
-      "ScalableBehavior",
-      _("Scalable capability"),
-      "Scale",
-      _("Change the object scale."),
-      "",
-      "res/actions/scale24_black.png",
-      "ResizableBehavior",
-      std::make_shared<gd::Behavior>(),
-      std::make_shared<gd::BehaviorsSharedData>())
-    .SetHidden();
-
-  aut.AddExpressionAndConditionAndAction(
-         "number",
-         "Value",
-         _("Scale"),
-         _("the scale of the object (default scale is 1)"),
-         _("the scale"),
-         _("Scale"),
-         "res/actions/scale24_black.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "ScalableBehavior")
-      .UseStandardParameters(
-          "number",
-          gd::ParameterOptions::MakeNewOptions().SetDescription(
-              _("Scale (1 by default)")))
-      .MarkAsAdvanced();
-
-  aut.AddExpressionAndConditionAndAction(
-         "number",
-         "X",
-         _("Scale on X axis"),
-         _("the scale on X axis of the object (default scale is 1)"),
-         _("the scale on X axis"),
-         _("Scale"),
-         "res/actions/scaleWidth24_black.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "ScalableBehavior")
-      .UseStandardParameters(
-          "number",
-          gd::ParameterOptions::MakeNewOptions().SetDescription(
-              _("Scale (1 by default)")))
-      .MarkAsAdvanced();
-
-  aut.AddExpressionAndConditionAndAction(
-         "number",
-         "Y",
-         _("Scale on Y axis"),
-         _("the scale on Y axis of the object (default scale is 1)"),
-         _("the scale on Y axis"),
-         _("Scale"),
-         "res/actions/scaleHeight24_black.png")
-      .AddParameter("object", _("Object"))
-      .AddParameter("behavior", _("Behavior"), "ScalableBehavior")
-      .UseStandardParameters(
-          "number",
-          gd::ParameterOptions::MakeNewOptions().SetDescription(
-              _("Scale (1 by default)")))
-      .MarkAsAdvanced();
-}
-
-}  // namespace gd
--- a/Core/GDCore/Extensions/Builtin/CommonConversionsExtension.cpp
+++ b/Core/GDCore/Extensions/Builtin/CommonConversionsExtension.cpp
@@ -15,28 +15,28 @@ BuiltinExtensionsImplementer::ImplementsCommonConversionsExtension(
  extension
      .SetExtensionInformation(
          "BuiltinCommonConversions",
-          _("Conversion"),
-          "Expressions to convert number, texts and quantities.",
+          _("Standard Conversions"),
+          _("Built-in extension providing standard conversions expressions."),
          "Florian Rival",
          "Open source (MIT License)")
      .SetExtensionHelpPath("/all-features/common-conversions");
-  extension.AddInstructionOrExpressionGroupMetadata(_("Conversion"))
-      .SetIcon("res/conditions/toujours24_black.png");
+
+#if defined(GD_IDE_ONLY)

  extension
      .AddExpression("ToNumber",
                     _("Text > Number"),
                     _("Convert the text to a number"),
-                     "",
-                     "res/conditions/toujours24_black.png")
+                     _("Conversion"),
+                     "res/conditions/toujours24.png")
      .AddParameter("string", _("Text to convert to a number"));

  extension
      .AddStrExpression("ToString",
                        _("Number > Text"),
                        _("Convert the result of the expression to text"),
-                        "",
-                        "res/conditions/toujours24_black.png")
+                        _("Conversion"),
+                        "res/conditions/toujours24.png")
      .AddParameter("expression", _("Expression to be converted to text"));

  extension
@@ -44,8 +44,8 @@ BuiltinExtensionsImplementer::ImplementsCommonConversionsExtension(
                        _("Number > Text ( without scientific notation )"),
                        _("Convert the result of the expression to text, "
                          "without using the scientific notation"),
-                        "",
-                        "res/conditions/toujours24_black.png")
+                        _("Conversion"),
+                        "res/conditions/toujours24.png")
      .AddParameter("expression", _("Expression to be converted to text"));

  extension
@@ -53,8 +53,8 @@ BuiltinExtensionsImplementer::ImplementsCommonConversionsExtension(
          "ToRad",
          _("Degrees > Radians"),
          _("Converts the angle, expressed in degrees, into radians"),
-          "",
-          "res/conditions/toujours24_black.png")
+          _("Conversion"),
+          "res/conditions/toujours24.png")
      .AddParameter("expression", _("Angle, in degrees"));

  extension
@@ -62,76 +62,10 @@ BuiltinExtensionsImplementer::ImplementsCommonConversionsExtension(
          "ToDeg",
          _("Radians > Degrees"),
          _("Converts the angle, expressed in radians, into degrees"),
-          "",
-          "res/conditions/toujours24_black.png")
+          _("Conversion"),
+          "res/conditions/toujours24.png")
      .AddParameter("expression", _("Angle, in radians"));
-
-  extension
-      .AddStrExpression("ToJSON",
-                        _("Convert scene variable to JSON"),
-                        _("Convert a scene variable to JSON"),
-                        _("JSON"),
-                        "res/conditions/toujours24_black.png")
-      .AddParameter("scenevar", _("Scene variable to be stringified"));
-
-  extension
-      .AddStrExpression("GlobalVarToJSON",
-                        _("Convert global variable to JSON"),
-                        _("Convert a global variable to JSON"),
-                        _("JSON"),
-                        "res/conditions/toujours24_black.png")
-      .AddParameter("globalvar", _("The global variable to be stringified"));
-
-  extension
-      .AddStrExpression("ObjectVarToJSON",
-                        _("Convert object variable to JSON"),
-                        _("Convert an object variable to JSON"),
-                        _("JSON"),
-                        "res/conditions/toujours24_black.png")
-      .AddParameter("objectPtr", _("The object with the variable"))
-      .AddParameter("objectvar", _("The object variable to be stringified"));
-
-  extension
-      .AddAction(
-          "JSONToVariableStructure",
-          _("Convert JSON to a scene variable"),
-          _("Parse a JSON object and store it into a scene variable"),
-          _("Convert JSON string _PARAM0_ and store it into variable _PARAM1_"),
-          "",
-          "res/actions/net24.png",
-          "res/actions/net.png")
-      .AddParameter("string", _("JSON string"))
-      .AddParameter("scenevar", _("Variable where store the JSON object"))
-      .MarkAsAdvanced();
-
-  extension
-      .AddAction("JSONToGlobalVariableStructure",
-                 _("Convert JSON to global variable"),
-                 _("Parse a JSON object and store it into a global variable"),
-                 _("Convert JSON string _PARAM0_ and store it into global "
-                   "variable _PARAM1_"),
-                 "",
-                 "res/actions/net24.png",
-                 "res/actions/net.png")
-      .AddParameter("string", _("JSON string"))
-      .AddParameter("globalvar",
-                    _("Global variable where store the JSON object"))
-      .MarkAsAdvanced();
-
-  extension
-      .AddAction("JSONToObjectVariableStructure",
-                 _("Convert JSON to object variable"),
-                 _("Parse a JSON object and store it into an object variable"),
-                 _("Parse JSON string _PARAM0_ and store it into variable "
-                   "_PARAM2_ of _PARAM1_"),
-                 "",
-                 "res/actions/net24.png",
-                 "res/actions/net.png")
-      .AddParameter("string", _("JSON string"))
-      .AddParameter("objectPtr", _("Object"))
-      .AddParameter("objectvar",
-                    _("Object variable where store the JSON object"))
-      .MarkAsAdvanced();
+#endif
 }

 }  // namespace gd
--- a/Core/GDCore/Extensions/Builtin/CommonInstructionsExtension.cpp
+++ b/Core/GDCore/Extensions/Builtin/CommonInstructionsExtension.cpp
@@ -4,8 +4,9 @@
 * reserved. This project is released under the MIT License.
 */
 #include "AllBuiltinExtensions.h"
+#include "GDCore/Tools/Localization.h"
+#if defined(GD_IDE_ONLY)
 #include "GDCore/Events/Builtin/CommentEvent.h"
-#include "GDCore/Events/Builtin/ForEachChildVariableEvent.h"
 #include "GDCore/Events/Builtin/ForEachEvent.h"
 #include "GDCore/Events/Builtin/GroupEvent.h"
 #include "GDCore/Events/Builtin/LinkEvent.h"
@@ -13,7 +14,7 @@
 #include "GDCore/Events/Builtin/StandardEvent.h"
 #include "GDCore/Events/Builtin/WhileEvent.h"
 #include "GDCore/Events/Event.h"
-#include "GDCore/Tools/Localization.h"
+#endif

 using namespace std;
 namespace gd {
@@ -24,56 +25,32 @@ BuiltinExtensionsImplementer::ImplementsCommonInstructionsExtension(
  extension
      .SetExtensionInformation(
          "BuiltinCommonInstructions",
-          _("Events and control flow"),
-          "GDevelop comes with a set of events and conditions that allow to "
-          "express the game logic and rules.",
+          _("Standard events"),
+          _("Built-in extension providing standard events."),
          "Florian Rival",
          "Open source (MIT License)")
-      .SetCategory("Advanced")
      .SetExtensionHelpPath("/all-features/advanced-conditions");
-  extension
-      .AddInstructionOrExpressionGroupMetadata(_("Events and control flow"))
-      .SetIcon("res/conditions/toujours24_black.png");
-
-  extension
-      .AddCondition("Always",
-                    _("Always"),
-                    _("This condition always returns true (or always false, if "
-                      "the condition is inverted)."),
-                    _("Always"),
-                    "",
-                    "res/conditions/toujours24_black.png",
-                    "res/conditions/toujours_black.png")
-      .SetHelpPath("/all-features/advanced-conditions")
-      .AddCodeOnlyParameter("conditionInverted", "")
-      .MarkAsAdvanced();
-
-  // Compatibility with GD <= 5.0.127
-  extension
-      .AddDuplicatedCondition(
-          "Toujours", "BuiltinCommonInstructions::Always", {.unscoped = true})
-      .SetHidden();
-  // end of compatibility code

+#if defined(GD_IDE_ONLY)
  extension
      .AddCondition("Or",
                    _("Or"),
-                    _("Check if one of the sub conditions is true"),
+                    _("Return true if one of the sub conditions is true"),
                    _("If one of these conditions is true:"),
-                    "",
-                    "res/conditions/or24_black.png",
-                    "res/conditions/or_black.png")
+                    _("Advanced"),
+                    "res/conditions/or24.png",
+                    "res/conditions/or.png")
      .SetCanHaveSubInstructions()
      .MarkAsAdvanced();

  extension
      .AddCondition("And",
                    _("And"),
-                    _("Check if all sub conditions are true"),
+                    _("Return true if all sub conditions are true"),
                    _("If all of these conditions are true:"),
-                    "",
-                    "res/conditions/and24_black.png",
-                    "res/conditions/and_black.png")
+                    _("Advanced"),
+                    "res/conditions/and24.png",
+                    "res/conditions/and.png")
      .SetCanHaveSubInstructions()
      .MarkAsAdvanced();

@@ -83,9 +60,9 @@ BuiltinExtensionsImplementer::ImplementsCommonInstructionsExtension(
          _("Not"),
          _("Return the contrary of the result of the sub conditions"),
          _("Invert the logical result of these conditions:"),
-          "",
-          "res/conditions/not24_black.png",
-          "res/conditions/not_black.png")
+          _("Advanced"),
+          "res/conditions/not24.png",
+          "res/conditions/not.png")
      .SetCanHaveSubInstructions()
      .MarkAsAdvanced();

@@ -94,52 +71,10 @@ BuiltinExtensionsImplementer::ImplementsCommonInstructionsExtension(
      _("Trigger once while true"),
      _("Run actions only once, for each time the conditions have been met."),
      _("Trigger once"),
-      "",
+      _("Advanced"),
      "res/conditions/once24.png",
      "res/conditions/once.png");

-  extension
-      .AddCondition("CompareNumbers",
-                    _("Compare two numbers"),
-                    _("Compare the two numbers."),
-                    _("_PARAM0_ _PARAM1_ _PARAM2_"),
-                    "",
-                    "res/conditions/egal24_black.png",
-                    "res/conditions/egal_black.png")
-      .SetHelpPath("/all-features/advanced-conditions")
-      .AddParameter("expression", _("First expression"))
-      .AddParameter("relationalOperator", _("Sign of the test"), "number")
-      .AddParameter("expression", _("Second expression"))
-      .MarkAsAdvanced();
-
-  // Compatibility with GD <= 5.0.127
-  extension
-      .AddDuplicatedCondition(
-          "Egal", "BuiltinCommonInstructions::CompareNumbers", {.unscoped = true})
-      .SetHidden();
-  // end of compatibility code
-
-  extension
-      .AddCondition("CompareStrings",
-                    _("Compare two strings"),
-                    _("Compare the two strings."),
-                    _("_PARAM0_ _PARAM1_ _PARAM2_"),
-                    "",
-                    "res/conditions/egal24_black.png",
-                    "res/conditions/egal_black.png")
-      .SetHelpPath("/all-features/advanced-conditions")
-      .AddParameter("string", _("First string expression"))
-      .AddParameter("relationalOperator", _("Sign of the test"), "string")
-      .AddParameter("string", _("Second string expression"))
-      .MarkAsAdvanced();
-
-  // Compatibility with GD <= 5.0.127
-  extension
-      .AddDuplicatedCondition(
-          "StrEqual", "BuiltinCommonInstructions::CompareStrings", {.unscoped = true})
-      .SetHidden();
-  // end of compatibility code
-
  extension.AddEvent(
      "Standard",
      _("Standard event"),
@@ -149,29 +84,29 @@ BuiltinExtensionsImplementer::ImplementsCommonInstructionsExtension(
      std::make_shared<gd::StandardEvent>());

  extension.AddEvent("Link",
-                     _("Link external events"),
-                     _("Link to external events."),
+                     _("Link"),
+                     _("Link to some external events"),
                     "",
                     "res/lienaddicon.png",
                     std::make_shared<gd::LinkEvent>());

  extension.AddEvent("Comment",
                     _("Comment"),
-                     _("Event displaying a text in the events editor."),
+                     _("Event displaying a text in the events editor"),
                     "",
                     "res/comment.png",
                     std::make_shared<gd::CommentEvent>());

  extension.AddEvent("While",
                     _("While"),
-                     _("Repeat the event while the conditions are true."),
+                     _("The event is repeated while the conditions are true"),
                     "",
                     "res/while.png",
                     std::make_shared<gd::WhileEvent>());

  extension.AddEvent("Repeat",
                     _("Repeat"),
-                     _("Repeat the event for a specified number of times."),
+                     _("Event repeated a number of times"),
                     "",
                     "res/repeat.png",
                     std::make_shared<gd::RepeatEvent>());
@@ -183,20 +118,13 @@ BuiltinExtensionsImplementer::ImplementsCommonInstructionsExtension(
                     "res/foreach.png",
                     std::make_shared<gd::ForEachEvent>());

-  extension.AddEvent(
-      "ForEachChildVariable",
-      _("For each child variable (of a structure or array)"),
-      _("Repeat the event for each child variable of a structure or array."),
-      "",
-      "res/foreach.png",
-      std::make_shared<gd::ForEachChildVariableEvent>());
-
  extension.AddEvent("Group",
-                     _("Event group"),
-                     _("Group containing events."),
+                     _("Group"),
+                     _("Group containing events"),
                     "",
                     "res/foreach.png",
                     std::make_shared<gd::GroupEvent>());
+#endif
 }

 }  // namespace gd
--- a/Core/GDCore/Extensions/Builtin/ExternalLayoutsExtension.cpp
+++ b/Core/GDCore/Extensions/Builtin/ExternalLayoutsExtension.cpp
@@ -13,32 +13,32 @@ void GD_CORE_API
 BuiltinExtensionsImplementer::ImplementsExternalLayoutsExtension(
    gd::PlatformExtension& extension) {
  extension
-      .SetExtensionInformation("BuiltinExternalLayouts",
-                               _("External layouts"),
-                               "Provides actions and conditions related to "
-                               "external layouts.",
-                               "Florian Rival",
-                               "Open source (MIT License)")
-      .SetExtensionHelpPath("/interface/scene-editor/external-layouts")
-      .SetCategory("Advanced");
-  extension.AddInstructionOrExpressionGroupMetadata(_("External layouts"))
-      .SetIcon("res/ribbon_default/externallayout32.png");
+      .SetExtensionInformation(
+          "BuiltinExternalLayouts",
+          _("External layouts"),
+          _("Built-in extension providing actions and conditions related to "
+            "external layouts"),
+          "Florian Rival",
+          "Open source (MIT License)")
+      .SetExtensionHelpPath("/interface/scene-editor/external-layouts");

+#if defined(GD_IDE_ONLY)
  extension
      .AddAction("CreateObjectsFromExternalLayout",
                 _("Create objects from an external layout"),
                 _("Create objects from an external layout."),
                 _("Create objects from the external layout named _PARAM1_"),
-                 "",
-                 "res/ribbon_default/externallayout32.png",
-                 "res/ribbon_default/externallayout32.png")
+                 _("External layouts"),
+                 "res/conditions/fichier24.png",
+                 "res/conditions/fichier.png")
      .AddCodeOnlyParameter("currentScene", "")
-      .AddParameter("externalLayoutName", _("Name of the external layout"))
+      .AddParameter("string", _("Name of the external layout"))
      .AddParameter("expression", _("X position of the origin"), "", true)
      .SetDefaultValue("0")
      .AddParameter("expression", _("Y position of the origin"), "", true)
      .SetDefaultValue("0")
      .MarkAsAdvanced();
+#endif
 }

 }  // namespace gd
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Florian Rival	9809410d6a	Rework Preferences dialog and show all hints to enable/disable	2019-12-27 14:28:43 +01:00
Florian Rival	1f8e66493e	Add preference to display assignment operators in EventsSheet	2019-12-27 12:57:22 +01:00
Florian Rival	c51ad70bb7	Remove redundant "current" word in animation related actions/conditions	2019-12-27 12:54:25 +01:00
Florian Rival	f267563e42	[codemod] Adapt sentences of action/conditions	2019-12-26 22:10:30 +01:00
Florian Rival	5200c1c366	Adapt extension properties to new sentences + various changes	2019-12-26 22:10:30 +01:00
Florian Rival	0a2f19d45e	Capitalize sentences displayed by Instruction	2019-12-26 22:10:30 +01:00
Florian Rival	d9ade248d0	Adapt OperatorField to new sentences	2019-12-26 22:10:30 +01:00
Florian Rival	b5815e2251	Add methods to use default (relational) operator parameters	2019-12-26 22:10:30 +01:00
Florian Rival	9059cc2479	Add script to refactor actions and conditions sentences	2019-12-26 22:10:30 +01:00