Fennel Syntax

Visual Studio Code extension

Fennel language syntax highlighting - grammar only

Status

Experimental. Work in progress.

Build out of curiosity and dissatisfaction with existing Fennel grammars.

Problems with existing grammars:

Multi-symbols are treated as single tokens
Shorthand-strings are not highlighted (with default color schemes)
Lua builtins are highlighted even though they are just normal functions (from Fennels point of view)
Bugs: Highlights in the middle of names:
- (fn table-index-of [...])
- (analyze-fn def.definition)

Highlights Fennel builtin special forms and macros differently, depending on where they are used:
- valid: (local foo 42)
- invalid: (foo local 42)
Highlights symbols differently when used as first item of a list:
- (foo a b 42)
Highlights only the function name part of multi-symbols:
- (foo.bar:baz 42)
- (foo.bar a b c)
Highlights :shorthand-strings and table.field.access in the same color.
Does not highlight Lua builtin functions. These are just normal functions.

I am abusing the keyword.control. scope to get prominent highlighting for shorthand strings and table field access.

Start the "Run Extension" task in vscode (F5)

npm install --ignore-scripts
npx vsce package
codium --install-extension foo.vsix

MIT License