Tree-sitter Grammar for Sigil

A tree-sitter grammar for the Sigil programming language.

Features

- Full syntax support for Sigil's unique features:
- Evidentiality markers: ! (known), ? (uncertain), ~ (reported), ‽ (paradox)
- Morpheme operators: τ (transform), φ (filter), σ (sort/sum), ρ (reduce), and more
- Pipeline syntax: data |τ{_ * 2} |φ{_ > 10}
- Rust-like constructs: structs, enums, traits, impl blocks
- Query files for syntax highlighting, indentation, and locals

Installation

$3

Add to your nvim-treesitter config:

``lua
local parser_config = require("nvim-treesitter.parsers").get_parser_configs()

parser_config.sigil = {
install_info = {
url = "https://github.com/Daemoniorum-LLC/sigil-lang",
files = { "tree-sitter-sigil/src/parser.c" },
branch = "main",
location = "tree-sitter-sigil",
},
filetype = "sigil",
}
`

Then run :TSInstall sigil

$3

The grammar will be available in Helix once it's added to the helix-editor/helix grammars.

For now, you can build manually:

`bash
cd tree-sitter-sigil
npm install
npm run generate
`

Then configure in ~/.config/helix/languages.toml:

`toml
[[language]]
name = "sigil"
scope = "source.sigil"
file-types = ["sigil", "sg"]
roots = ["Sigil.toml"]

[[grammar]]
name = "sigil"
source = { path = "/path/to/sigil-lang/tree-sitter-sigil" }
`

Development

$3

- Node.js >= 18
- tree-sitter CLI: npm install -g tree-sitter-cli

$3

`bash
npm install
npm run generate
`

$3

`bash
npm test
`

$3

`bash
tree-sitter parse /path/to/file.sigil
`

Query Files

- queries/highlights.scm - Syntax highlighting
- queries/indents.scm - Automatic indentation
- queries/locals.scm - Local variable scoping

Sigil-Specific Highlighting

The grammar provides special highlighting for Sigil's unique features:

$3

`sigil
let known! = compute(); // ! = known (verified)
let uncertain? = maybe(); // ? = uncertain (validated)
let reported~ = external(); // ~ = reported (external)
`

$3

`sigil
// Greek letters get @function.builtin highlighting
let doubled = nums |τ{_ * 2}; // τ = transform
let filtered = nums |φ{_ > 0}; // φ = filter
let total = nums |Σ; // Σ = sum
``

License

MIT License - Daemoniorum, LLC