Theia-Modula-2

Modula-2 IDE

A starting point for a dedicated GNU Modula-2 IDE built on Eclipse Theia.

Included

• Browser and Electron Theia applications
• Native Theia modula2-workbench extension
• VS Code-compatible modula2-language extension
• .mod and .def support
• TextMate syntax highlighting
• Modula-2 comments, brackets and indentation
• Modula-2 snippets
• Keyword-only automatic uppercasing
• AST-backed document outline, completion, hover, go-to-definition, find references and rename (lenient declaration parser with cross-file .def resolution)
• GNU Modula-2 compiler service: async Build/Build File/Clean/Rebuild/Run plus compiler detection, driven by the workspace modula2.json
• Initial Modula-2 commands/menu
• Project/example/grammar placeholders

Requirements

The current project targets Eclipse Theia 1.75.0, whose current stable release uses Node.js 24 as its minimum. Use Yarn Classic (1.x).

node --version
yarn --version
yarn
yarn build

Run browser:

yarn start:browser

Run Electron:

yarn start:electron

The language extension is intentionally a VS Code-compatible extension because Theia recommends VS Code extensions for language support. Native Theia extensions are used for product-specific workbench features.

Roadmap

1. Stabilize the GNU Modula-2/Coco/R grammar against gm2 (see GNU-grammar).
2. Add AST, symbols and semantic analysis AST/symbols done (lenient parser); semantic analysis pending.
3. Add LSP LSP live (diagnostics bridge + outline/completion/hover/definition).
4. Add modula2.json project support.
5. Add GNU Modula-2 build/run/diagnostics.
6. Add debugger integration.

Local VS Code language extension

The Modula-2 language extension is a VS Code-compatible extension. The build synchronizes it into plugins/modula2-language, and the Browser/Electron applications start Theia with --plugins=local-dir:../../plugins. The plugin directory must contain the extension folder; pointing --plugins directly at the extension folder does not provide the expected container layout.

Coco/R language-server bridge (0.1.7)

The language extension now contains a real LSP client/server pair. The server can invoke a GNU Modula-2 executable generated from a Coco/R grammar and turn its editor-oriented diagnostics into LSP diagnostics. See extensions/modula2-language/COCOR-LSP.md.