'unicode-haskell.vim' is a simple Vim script which will improve the way Haskell source code is displayed in Vim/GVim by replacing certain character sequences with appropriate Unicode replacements. The Unicode characters are not written to disk but only used for display.
Screenshot ~~~~ See http://imageshack.us/photo/my-images/840/unicodehaskell.png/ for a sample of what Unicode characters this script uses in the editor.
In case you’re using something like Pathogen you can simply clone this repository into your 'bundle' directory:
cd ~/.vim/bundle git clone git://github.com/frerich/unicode-haskell.vim
Now 'unicode-haskell.vim' is installed.
Otherwise, simply copy the 'unicode-haskell.vim' file into the 'ftplugin/haskell' subdirectory of your vim configuration folder; that would be '$HOME/.vimrc/ftplugin/haskell' on Mac OS/X and Linux and '%HOME%\vimfiles\ftplugin\haskell' on Windows.
Furthermore, the filetype plugin must be turned on so that vim picks up this script and you should set the encoding to UTF-8 so that all the fancy characters are actually displayed Just add
filetype plugin on set encoding=utf-8
to your '.vimrc' or '.gvimrc' file.
Finally, make sure that you use 'gvim' with a Unicode font. On Mac OSX the font DejaVu Sans Mono works very well. Add
if has("gui_running")
set guifont=DejaVu_Sans_Mono:h9
endif
to your '.vimrc' to use it.
'unicode-haskell.vim' was written by Frerich Raabe.
This script is based on the Haskell Cuteness vim script by Andrey Popp, which in turn is based on the unilatex.vim script by Jos van den Oever.