tree-sitter-lp

A tree-sitter grammar for LP (Linear Programming) files — the format used by CPLEX, Gurobi, PuLP, and other optimisation solvers.

Provides syntax highlighting, code folding, indentation, and local-variable queries for editors that support tree-sitter.

Commands

npm install              # install dependencies
npm run build            # generate the parser (tree-sitter generate)
npm test                 # run the test corpus
npm run parse -- FILE    # parse a single .lp file
npm run format           # format grammar.js with prettier
npm run format:check     # check formatting without writing

Neovim Setup (Local Development)

Add the following to your Neovim configuration (e.g. init.lua or a ftdetect file) before any .lp file triggers tree-sitter:

-- Register the lp filetype and tree-sitter language
vim.filetype.add({ extension = { lp = 'lp' } })
vim.treesitter.language.register('lp', 'lp')

-- Point nvim-treesitter at the local grammar
local ok, parsers = pcall(require, 'nvim-treesitter.parsers')
if ok then
  parsers.get_parser_configs().lp = {
    install_info = {
      url = '/path/to/tree-sitter-lp',
      files = { 'src/parser.c' },
      generate_requires_npm = false,
      requires_generate_from_grammar = false,
    },
    filetype = 'lp',
  }
end

Then install the parser:

:TSInstall lp

Copy the query files into your Neovim runtime so highlights, folds, and indents are picked up:

mkdir -p ~/.config/nvim/queries/lp
cp queries/*.scm ~/.config/nvim/queries/lp/

LP File Format

An LP file has the following structure:

Minimize
  obj: x1 + 2 x2 + 3 x3

Subject To
  c1: x1 + x2 <= 10
  c2: x2 + x3 >= 5

Bounds
  0 <= x1 <= 40
  x2 >= 0

Generals
  x3

End

Licence

MIT