Langium Support for VS Code

This extension contributes support for the Langium grammar declaration language. The underlying language server is built with Langium itself.

Language Features

• Syntax highlighting
• Completion
• Diagnostics
• Code actions
• Go to definition
• Find references
• Document highlighting
• Document symbols
• Semantic tokens highlighting

Syntax Diagrams

Langium grammar files can be visualised as syntax diagrams using the Show Railroad Syntax Diagram button that appears in the tab bar of .langium files.

👁 Example Syntax Diagram