ghcmod.vim

Happy Haskell programming on Vim, powered by ghc-mod

http://www.vim.org/scripts/script.php?script_id=4473

Features

• Displaying the type of sub-expressions (ghc-mod type)
• Displaying error/warning messages and their locations (ghc-mod check and ghc-mod lint)
• Displaying the expansion of splices (ghc-mod expand)

Completions are supported by another plugin. See neco-ghc .

Requirements

Vim

ghcmod.vim contains ftplugin. Please make sure that filetype plugin is enabled. To check it, type :filetype and you would see something like this: filetype detection:ON plugin:ON indent:ON. You can enable it by :filetype plugin on. I highly recommend adding filetype plugin indent on to your vimrc. See :help :filetype-overview for more details.

vimproc

https://github.com/Shougo/vimproc

ghc-mod

cabal install ghc-mod

Details

If you'd like to give GHC options, set g:ghcmod_ghc_options.

let g:ghcmod_ghc_options = ['-idir1', '-idir2']

Also, there's buffer-local version b:ghcmod_ghc_options.

autocmd BufRead,BufNewFile ~/.xmonad/* call s:add_xmonad_path()
function! s:add_xmonad_path()
  if !exists('b:ghcmod_ghc_options')
    let b:ghcmod_ghc_options = []
  endif
  call add(b:ghcmod_ghc_options, '-i' . expand('~/.xmonad/lib'))
endfunction

:GhcModType, :GhcModTypeClear

Type :GhcModType on a expression, then the sub-expression is highlighted and its type is echoed. If you type :GhcModType multiple times, the sub-expression changes.

1. 
2. 
3. 
4. 
5. 

Since ghc-mod 1.10.8, not only sub-expressions but name bindings and sub-patterns are supported.

• 
• 

Type :GhcModTypeClear to clear sub-expression's highlight.

Sub-expressions are highlighted as Search by default. You can customize it by setting g:ghcmod_type_highlight .

hi ghcmodType ctermbg=yellow
let g:ghcmod_type_highlight = 'ghcmodType'

:GhcModCheck, :GhcModLint

You can get compiler errors/warnings by :GhcModCheck and they are available in quickfix window.

Similarly, type :GhcModLint to get suggestions by ghc-mod lint.

If you'd like to pass options to hlint, set g:ghcmod_hlint_options.

let g:ghcmod_hlint_options = ['--ignore=Redundant $']

:GhcModCheckAsync, :GhcModLintAsync, :GhcModCheckAndLintAsync

You can run check and/or lint asynchronously.

This would be useful when you'd like to run check and/or lint automatically (especially on BufWritePost). See Customize wiki page for more detail.

:GhcModExpand

You can see the expansion of splices by :GhcModExpand and they are available in quickfix window.

This feature was introduced since ghc-mod 1.10.10.

Customize

See wiki page Customize.

License

BSD3 License, the same license as ghc-mod.

Copyright (c) 2012-2013, eagletmt