vim/runtime/ftplugin/haskell.vim

" Vim filetype plugin file
" Language:             Haskell
" Maintainer:           Daniel Campoverde <alx@sillybytes.net>
" Previous Maintainer:  Nikolai Weibull <now@bitwi.se>
" Latest Revision:      2018-08-27

if exists("b:did_ftplugin")
  finish
endif
let b:did_ftplugin = 1

let s:cpo_save = &cpo
set cpo&vim

let b:undo_ftplugin = "setl com< cms< fo<"

setlocal comments=s1fl:{-,mb:-,ex:-},:-- commentstring=--\ %s
setlocal formatoptions-=t formatoptions+=croql
setlocal omnifunc=haskellcomplete#Complete
setlocal iskeyword+='

let &cpo = s:cpo_save
unlet s:cpo_save