A VS Code extension that provides syntactic highlighting and semantic highlighting for .gmad files used by BDSim/GMAD.
What it does
Adds TextMate grammar for GMAD syntax (file in syntaxes/GMAD.tmLanguage.json).
Register a Semantic Tokens provider (extension.js) that highlights declared variables: collects defined variables (left side of =) and colors all their occurrences in the document.
Enable semantic highlighting configurable via package.json (token type gmadVariable).
Features
Keyword and syntax highlighting via TextMate grammar.
Semantic highlighting of variables already declared in the same file (customizable default color).
Automatic activation for files with .gmad extension.
How to use
Open a file with .gmad extension in VS Code.
The extension fires automatically!!
In this example beamEnergy will be highlighted where it is used.
Color configuration
You can customize the color of semantic variables via VS Code settings: in settings.json add a rule in editor.semanticTokenColorCustomizations.rules for gmadVariable (see package.json for the example setting used by the extension).
Main files
extension.js: provider for Semantic Tokens and language registration.
syntaxes/GMAD.tmLanguage.json: TextMate grammar for GMAD syntax.
language-configuration.json: language configuration (comments, brackets, etc.).
Requirements
VS Code 1.120.0 or higher (probably lower but didn't test for it).
Known issues
The semantic provider uses a simple heuristic (basic line-by-line parsing). May not recognize complex declarations or multiple scopes.
Contribute
Open an issue or pull request if you want to improve the grammar, semantic provider or add tests.
Thanks for using the extension — let me know if you want me to add testing instructions or more detailed examples.
