Knot Language Support for VS Code
Syntax highlighting and Language Server Protocol support for the Knot programming language.
Features
Syntax highlighting — Full tokenization for .knot source files:
- Keywords (
func, class, enum, if, match, for, while, import, etc.)
- Primitive types (
I8–I64, U8–U64, F32, F64, String, Bool, Void, Any)
- String literals (double-quoted with escapes, single-quoted raw, backtick raw)
- Numeric literals (decimal, hex
0x, binary 0b, octal 0o, float with suffixes)
- Comments (
// line, /* */ block)
- Operators (
->, =>, ++, +=, ==, !=, ??, .., ::, etc.)
- Function / class / enum name highlighting
- Wrap decorators (
@name)
Language Server Protocol — Requires a knot compiler binary on PATH:
- Real-time diagnostics (parser + semantic analysis errors and warnings)
- Code completion (keywords and built-in types)
- Hover information
Language configuration — Bracket matching, auto-closing pairs, comment toggling
Requirements
A knot compiler binary that supports the lsp subcommand. Build it from source:
git clone https://github.com/knot-lang/knot
cd knot
cargo build
Extension Settings
| Setting |
Default |
Description |
knot.lsp.path |
"knot" |
Path to the knot compiler binary |
Syntax highlighting works without the compiler. The LSP features (diagnostics, completion, hover) require a knot binary that supports knot lsp.
Known Issues
- LSP server restart is disabled; if the compiler crashes, reload the window (
Ctrl+Shift+P → Developer: Reload Window).
- Completion list is currently a static keyword set (not context-aware).
Release Notes
0.0.1
Initial release: syntax highlighting + LSP (diagnostics, completion, hover).
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