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" Vim indent file
" Language: ChaiScript
" Maintainer: Jason Turner <lefticus 'at' gmail com>
" Only load this indent file when no other was loaded.
if exists("b:did_indent")
finish
endif
let b:did_indent = 1
setlocal indentexpr=GetChaiScriptIndent()
setlocal autoindent
" Only define the function once.
if exists("*GetChaiScriptIndent")
finish
endif
function! GetChaiScriptIndent()
" 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 that start a block:
" lines containing a {
let ind = indent(lnum)
let flag = 0
let prevline = getline(lnum)
if prevline =~ '^.*{.*'
let ind = ind + &shiftwidth
let flag = 1
endif
" Subtract a 'shiftwidth' after lines containing a { followed by a }
" to keep it balanced
if flag == 1 && prevline =~ '.*{.*}.*'
let ind = ind - &shiftwidth
endif
" Subtract a 'shiftwidth' on lines ending with }
if getline(v:lnum) =~ '^\s*\%(}\)'
let ind = ind - &shiftwidth
endif
return ind
endfunction
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