Lispex for Visual Studio Code and Open VSX

Editor support for the Lispex language:

• .lspx file recognition;
• Lispex syntax highlighting;
• the Lispex file icon in both light and dark editor themes; and
• Format Document support through the installed Native lispex fmt command.

The extension does not bundle a runtime or language server. Install the Native Lispex CLI, make lispex available on PATH, then use Format Document or format-on-save. If the executable lives elsewhere, set lispex.format.executable to its path. Formatting preserves comments and literal spellings and reports invalid source without changing the document. Autocomplete, hover information, and editor diagnostics are not included.

Install

• Visual Studio Marketplace

• Open VSX Registry

• From source — package it yourself:

  cd editors/vscode
  npx @vscode/vsce package
  code --install-extension lispex-*.vsix
  

Grammar

syntaxes/lispex.tmLanguage.json covers the special forms the interpreter recognises, the standard procedure set, #t / #f, #\char literals, line and nested #| … |# comments, decimal integer/rational/real literals, strings with supported escapes, and quote/quasiquote/unquote punctuation.

Lispex deliberately rejects reader extensions such as the #; datum comment, #lang, and numeric radix/exactness prefixes such as #x and #e. The extension does not highlight those spellings as supported syntax.

Formatting

The editor sends the current document to lispex fmt - without a shell and uses stdout only after the command succeeds. The default timeout is ten seconds; lispex.format.timeoutMs can set a value from 1,000 to 60,000 ms. Formatting is a Native CLI feature. The npm runtime, browser WASM, and Playground do not provide it.

License

This extension is distributed under Apache-2.0. Its license does not license the private Lispex source repository or grant rights to Lispex marks.