patch-rexx.nvim

Neovim support for the REXX programming language.

Features

• Syntax highlighting - Keywords, built-in functions, strings, comments, labels
• Auto-indentation - Smart indentation for DO/END, IF/THEN/ELSE, SELECT/WHEN
• LSP integration - Real-time diagnostics (parse errors, undefined labels)
• Completions - Keywords, built-in functions, labels, variables
• Hover - Documentation for keywords and BIFs
• Go to definition - Jump to labels and subroutines
• Breadcrumbs - Document symbols showing subroutines in your statusline
• Code actions - Suggestions for misspelled function and label names
• Inlay hints - PARSE variable hints and NUMERIC DIGITS precision (opt-in)

Requirements

• Neovim 0.10+ (for vim.lsp.start and vim.filetype.add)
• rexx-lsp binary in your PATH

Installing rexx-lsp

Build from source:

git clone https://github.com/navicore/patch-rexx
cd patch-rexx
cargo install --path . --features lsp

Installation

Using lazy.nvim

{
  "navicore/patch-rexx.nvim",
  ft = "rexx",
  opts = {},
}

With custom configuration

{
  "navicore/patch-rexx.nvim",
  ft = "rexx",
  opts = {
    -- Enable inlay hints (off by default)
    inlay_hints = true,

    -- Custom path to rexx-lsp binary (optional)
    cmd = { "/path/to/rexx-lsp" },

    -- LSP capabilities (optional, for completion plugins)
    capabilities = require("cmp_nvim_lsp").default_capabilities(),

    -- on_attach callback (optional)
    on_attach = function(client, bufnr)
      -- Your keymaps here
    end,
  },
}

Manual setup

If you prefer manual configuration:

require("rexx-lsp").setup({})

Usage

Once installed, open any .rexx or .rex file and the LSP will start automatically. Diagnostics appear inline as you type.

License

MIT