https://github.com/neovimhaskell/haskell-vim

Custom Haskell Vimscripts
https://github.com/neovimhaskell/haskell-vim

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Custom Haskell Vimscripts

• Host: GitHub
• URL: https://github.com/neovimhaskell/haskell-vim
• Owner: neovimhaskell
• License: bsd-2-clause
• Created: 2014-06-17T18:31:15.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2022-09-11T02:38:22.000Z (about 2 years ago)
• Last Synced: 2024-04-16T08:12:27.153Z (5 months ago)
• Language: Vim script
• Size: 235 KB
• Stars: 680
• Watchers: 13
• Forks: 85
• Open Issues: 34
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
Syntax Highlighting and Indentation for Haskell and Cabal

=========================================================

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.

![Screenshot](http://raichoo.github.io/images/haskell-vim.png)

## Features

* 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

## Installation

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

### Manual Installation

Copy content into your `~/.vim` directory.

## Configuration

### Features

To enable the features you would like to use, just add the according line to your

`.vimrc`.

```viml

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

```

### Highlighting

`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`.

### Indentation

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](https://github.com/alx741/vim-hindent) plugin to achieve automatic

indentation using *hindent*.

#### Haskell

* `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) -> ...

#### Cabal

*  `let g:cabal_indent_section = 2` (limited to max. 4 spaces)

        executable name

        >>main-is:             Main.hs

[Pathogen]: https://github.com/tpope/vim-pathogen

[idris-vim]: https://github.com/idris-hackers/idris-vim