Simple auto-pair vim config.

pairs.vim

if exists("did_pairs") | finish | endif
let did_pairs = 1

" wiki page: http://vim.wikia.com/wiki/Automatically_append_closing_characters

" let me turn it off when I want
let b:PairOn=1
function PairsToggle()
	if exists("b:PairOn") && b:PairOn
		let b:PairOn = 0
	else
		let b:PairOn = 1
	endif
endfunction

" <C-G>U is a new binding in patch 7.4.849
" Allows for moving of cursor w/o starting new undo sequence
function! s:maybematch(match)
	if ! exists("b:PairOn") || b:PairOn
        " only insert if end of line and not start of line
		if col('$') == col('.') && col('.') > 2
			return a:match . repeat("\<C-G>U\<Left>", len(a:match))
		endif
	endif
    return ''
endfunction

inoremap ( (<C-R>=<SID>maybematch(')')<CR>
inoremap [ [<C-R>=<SID>maybematch(']')<CR>
inoremap { {<C-R>=<SID>maybematch('}')<CR>