OMG IDL (AstuteDDS)

Syntax highlighting, snippets, and language tooling for OMG IDL 4.2 — the Interface Definition Language used by the Object Management Group's Data Distribution Service (DDS) standard, as implemented by AstuteDDS.

Features

• Syntax highlighting for .idl files: keywords, builtin types (long, octet, sequence<T>, string<N>, ...), @annotation(...) syntax (@key, @appendable, @mutable, @id, ...), scoped names (Module::Type), comments (//, /* */, /** */ doc comments), and literals.
• Snippets for common declarations: module, struct (appendable/final/ mutable), @key fields, union/switch, enum, typedef, sequence, and interface.
• Editor conveniences: bracket matching, auto-closing pairs, comment toggling, and code folding.
• Generate Code from IDL...: right-click a .idl file (Explorer or editor) to run the astutedds-idl compiler and generate C++/C/Python code. Only shown when the compiler is detected on idl.compilerPath.
• Format Document: re-indents based on brace nesting (honours the editor's tab size/spaces setting), trims trailing whitespace, collapses redundant inter-token spacing (e.g. alignment-padded declarations like long id;) down to a single space, joins a declaration that's been split across multiple lines (e.g. struct\nName\n{) back onto one line so opening braces end up placed consistently, and drops blank lines nested inside braces (blank lines between top-level declarations are kept). Comment bodies and string/char literal contents are always left alone. Works standalone (no compiler required). Set this extension as the default formatter for .idl files (done automatically) and enable "editor.formatOnSave": true for [omg-idl] to format on save.

Format on save

This extension is set as the default formatter for .idl files automatically. Add the following to your user or workspace settings.json to also format on save:

"[omg-idl]": {
  "editor.formatOnSave": true
}

Note: block comment bodies (the lines inside /* ... */) are left untouched to preserve doc-comment alignment, so their indentation may not perfectly line up if the enclosing declaration's indent level changes.

Requirements

None for syntax highlighting, snippets, and editor conveniences — these work standalone. The optional diagnostics and language-server features shell out to native binaries (see settings below).

Extension Settings

Building the language server (server/)

The language server reuses the lexer/parser from astutedds-cxx's IDL compiler, vendored as static source copies at server/vendor/idl_compiler/ (see VENDORED_FROM.md for the exact upstream commit and update instructions).

cmake -B server/build -S server -DCMAKE_BUILD_TYPE=Release
cmake --build server/build --parallel

This produces server/build/astutedds-idl-lsp. Set idl.languageServerPath to that path (or copy it to server-bin/<platform>/ before packaging, which npx vsce package --target <platform> will bundle automatically) and enable idl.enableLanguageServer.

License

MIT — see LICENSE.