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" Vim indent file
" Language: Lua script
" Maintainer: Marcus Aurelius Farias <marcuscf@vant.com.br>
" First Author: Max Ischenko <mfi@ukr.net>
" Last Change: 2003 Jan 20
" Only define the function once.
if exists("*GetLuaIndent") | finish | endif
setlocal indentexpr=GetLuaIndent()
" To make Vim call GetLuaIndent() when it finds '\s*end' or '\s*until'
" on the current line (else is default).
setlocal indentkeys+=0=end,0=until
setlocal autoindent
function! GetLuaIndent()
" Find a non-blank line above the current line.
let lnum = prevnonblank(v:lnum - 1)
" Hit the start of the file, use zero indent.
if lnum == 0
return 0
endif
" Add a 'shiftwidth' after lines beginning with:
" function, if, for, while, repeat, else, elseif, '{'
let ind = indent(lnum)
let flag = 0
if getline(lnum) =~ '^\s*\(function\>\|if\>\|for\>\|while\>\|repeat\>\|else\>\|elseif\>\|do\>\)' || getline(lnum) =~ '{\s*$' || getline(lnum) =~ '\s*=\s*function'
let ind = ind + &sw
let flag = 1
endif
" Subtract a 'shiftwidth' after lines ending with
" 'end' when they begin with while, if, for, etc.
if flag == 1 && getline(lnum) =~ '\<end\>\|\<until\>'
let ind = ind - &sw
endif
" Subtract a 'shiftwidth' on end, else (and elseif), until and '}'
" This is the part that requires 'indentkeys'.
if getline(v:lnum) =~ '^\s*\(end\|else\|until\|}\)'
let ind = ind - &sw
endif
return ind
endfunction
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