I was unhappy with the Haskell scripts that are shipped with vim, therefore I decided to make my own based on idris-vim.
I hope you find this useful.
- Covers a broader spectrum of keywords
- Highlighting for new features like type families, pattern synonyms, arrow syntax, recursive do, role annotations, QuasiQuotation
- More contextual highlighting (e.g. highlight 'as' or 'family' only in appropriate places)
- Smarter indentation
- Better Cabal support
I recommend using Pathogen for installation. Simply clone
this repo into your ~/.vim/bundle
directory and you are ready to go.
cd ~/.vim/bundle
git clone https://github.com/neovimhaskell/haskell-vim.git
Be sure that the following lines are in your
.vimrc
syntax on
filetype plugin indent on
Copy content into your ~/.vim
directory.
To enable the features you would like to use, just add the according line to your
.vimrc
.
let g:haskell_enable_quantification = 1 " to enable highlighting of `forall`
let g:haskell_enable_recursivedo = 1 " to enable highlighting of `mdo` and `rec`
let g:haskell_enable_arrowsyntax = 1 " to enable highlighting of `proc`
let g:haskell_enable_pattern_synonyms = 1 " to enable highlighting of `pattern`
let g:haskell_enable_typeroles = 1 " to enable highlighting of type roles
let g:haskell_enable_static_pointers = 1 " to enable highlighting of `static`
let g:haskell_backpack = 1 " to enable highlighting of backpack keywords
haskell-vim
has an opinionated highlighting. If you do not like that you can switch to
a more traditional mode by setting g:haskell_classic_highlighting
to 1
.
Disabling Template Haskell and Quasiquoting syntax is possible by setting
g:haskell_disable_TH
to 1
.
To configure indentation in haskell-vim
you can use the following variables to change indentation depth, just add the according line to your .vimrc
.
If you dislike how indentation works you can disable it by setting g:haskell_indent_disable
to
1
.
Additionally you can use the vim-hindent plugin to achieve automatic indentation using hindent.
-
let g:haskell_indent_if = 3
if bool >>>then ... >>>else ...
-
let g:haskell_indent_case = 2
case xs of >>[] -> ... >>(y:ys) -> ...
-
let g:haskell_indent_let = 4
let x = 0 in >>>>x
-
let g:haskell_indent_where = 6
where f :: Int -> Int >>>>>>f x = x
-
let g:haskell_indent_before_where = 2
foo >>where
-
let g:haskell_indent_after_bare_where = 2
where >>foo
-
let g:haskell_indent_do = 3
do x <- a >>>y <- b
-
let g:haskell_indent_in = 1
let x = 1 >in x
-
let g:haskell_indent_guard = 2
f x y >>|
haskell-vim
also supports an alterative style for case
indentation.
-
let g:haskell_indent_case_alternative = 1
f xs ys = case xs of >>[] -> ... >>(y:ys) -> ...
-
let g:cabal_indent_section = 2
(limited to max. 4 spaces)executable name >>main-is: Main.hs