40 lines
784 B
VimL
40 lines
784 B
VimL
" Language: PEG
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" Maintainer: Bruce Hill <bruce@bruce-hill.com>
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" License: WTFPL
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if exists("b:did_indent")
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finish
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endif
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let b:did_indent = 1
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setlocal autoindent
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setlocal indentexpr=GetPEGIndent()
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setlocal indentkeys+=-:
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" Only define the function once.
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if exists("*GetPEGIndent")
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finish
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endif
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function! GetPEGIndent()
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let line = getline(v:lnum)
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let current_ind = indent(v:lnum)
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let previousNum = prevnonblank(v:lnum - 1)
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let previous = getline(previousNum)
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let ind = indent(previousNum)
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if previous =~ '<-\s*\($\|--\)' || previous =~ ':\s*\($\|--\)'
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let ind = &tabstop
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endif
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if line =~ '^\s*\w\+\s*<-\|^\s*\w\+\s*(\s*\w+\s*)\s*:'
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let ind = 0
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endif
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if ind == indent(previousNum)
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return current_ind
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endif
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return ind
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endfunction
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