DeltaScript VS Code Extension

Language support for DeltaScript: syntax highlighting, inline diagnostics (syntax and types), completions, hovers with code previews, go to definition.

Features

• Syntax highlighting (keywords, types, function declarations/calls, member calls, maybe/true/false, ::Type annotations).
• Language configuration (comments, brackets, auto-closing pairs).
• Inline diagnostics via LSP (syntax and DeltaScript type errors) with red squiggles and Problems entries.
• Smarter completions:
  • Keywords (async/await, control flow, declarations).
  • Types (num, str, mbool, obj, arr) and constants (true, false, maybe).
  • spec.* helpers (log, error, warn, info, debug, success, input).
  • In-scope/local identifiers and previously typed words.
  • Snippets (function and class).
• Hover:
  • Keyword/tooltips for mut, inmut, func, interface, spec.*.
  • Code preview of symbol definitions (functions, classes, interfaces, variables).
• Go to Definition, Document/Workspace Symbols, References, Rename, Signature Help.

Requirements

• VS Code 1.84+
• Node.js 18+
• The extension starts a bundled LSP server and uses the DeltaScript transpiler for diagnostics. Load order:
  1. extension/server/transpiler.js (bundled copy you can update when building the language)
  2. deltascript/dist/transpiler.js (installed package)
  3. ../../dist/transpiler.js (when developing side-by-side)

Usage

• Open a .ds file.
• You will get colorization, inline errors (syntax + type), completions, hover details with code previews, go-to-definition, and more.

License

MIT