FastC Language Server

Language Server Protocol (LSP) implementation for FastC.

Features

• Diagnostics - Real-time error and warning reporting
• Go to Definition - Navigate to function and type definitions
• Hover - Type information on hover
• Workspace Support - Multi-file project support

Installation

# Build from source
cargo install --path .

# Or build the workspace
cargo build --release -p fastc-lsp

Editor Setup

VS Code

Install the FastC extension or configure manually:

{
  "fastc.lsp.path": "/path/to/fastc-lsp"
}

Neovim (nvim-lspconfig)

local lspconfig = require('lspconfig')
local configs = require('lspconfig.configs')

configs.fastc = {
  default_config = {
    cmd = { 'fastc-lsp' },
    filetypes = { 'fastc' },
    root_dir = lspconfig.util.root_pattern('fastc.toml', '.git'),
  },
}

lspconfig.fastc.setup{}

Helix

Add to ~/.config/helix/languages.toml:

[[language]]
name = "fastc"
scope = "source.fastc"
file-types = ["fc"]
language-servers = ["fastc-lsp"]

[language-server.fastc-lsp]
command = "fastc-lsp"

Usage

The language server is typically started automatically by your editor. For manual testing:

# Start the server (communicates via stdio)
fastc-lsp

Documentation

• Editor Setup Guide
• FastC Documentation

License

This project is licensed under the MIT License.