tree-sitter-lumos

Tree-sitter grammar for LUMOS - a type-safe schema language for Solana development.

Features

• Fast parsing: Incremental, error-tolerant parsing
• Syntax highlighting: Accurate highlighting for all LUMOS syntax
• Editor integration: Works with Neovim, Emacs, and other Tree-sitter-enabled editors
• Complete coverage: Supports structs, enums, attributes, all types, and comments

Installation

Neovim (with nvim-treesitter)

{
  "nvim-treesitter/nvim-treesitter",
  opts = {
    ensure_installed = { "lumos" },
  },
}

Manual Installation

git clone https://github.com/getlumos/tree-sitter-lumos
cd tree-sitter-lumos
npm install
npm run build

Development

Prerequisites

• Node.js (v16+)
• npm
• tree-sitter-cli

Setup

# Install dependencies
npm install

# Generate parser
npm run build

# Run tests
npm test

# Parse a file
npm run parse examples/player.lumos

Project Structure

tree-sitter-lumos/
├── grammar.js           # Grammar definition
├── queries/
│   └── highlights.scm   # Syntax highlighting queries
├── test/
│   └── corpus/          # Test cases
│       ├── struct.txt   # Struct tests
│       └── enum.txt     # Enum tests
├── src/                 # Generated parser (C code)
└── bindings/            # Language bindings

Grammar Coverage

Supported Syntax

• Structs: With fields and attributes

  #[solana]
  #[account]
  struct Player {
      wallet: PublicKey,
      score: u64,
  }

• Enums: Unit, tuple, and struct variants

  enum GameState {
      Active,
      Paused,
      Finished(u64),
      Custom { reason: String },
  }

• Types:

  • Primitives: u8, u16, u32, u64, u128, i8-i128, bool, String
  • Solana types: PublicKey, Signature
  • Complex: Vec<T>, Option<T>, [T]

• Attributes: #[solana], #[account], custom attributes with values

• Comments: Line (//) and block (/* */)

Testing

Run the test suite:

npm test

Add new test cases in test/corpus/:

================
Test name
================

<LUMOS code>

---

<Expected parse tree>

Integration

Neovim

Use with nvim-treesitter:

require('nvim-treesitter.configs').setup({
  ensure_installed = { "lumos" },
  highlight = { enable = true },
})

Emacs

Use with tree-sitter-mode

Helix

Add to languages.toml:

[[language]]
name = "lumos"
scope = "source.lumos"
file-types = ["lumos"]
roots = []
comment-token = "//"
grammar = "lumos"

Contributing

Contributions welcome! Please:

1. Add test cases for new syntax
2. Run npm test before submitting
3. Update README if adding features

Resources

• LUMOS Documentation
• Tree-sitter Documentation
• Neovim Plugin

License

Dual-licensed under MIT OR Apache-2.0

Part of the LUMOS ecosystem 🚀