updated for version 7.2a
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Bram Moolenaar
206
runtime/indent/erlang.vim
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206
runtime/indent/erlang.vim
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" Vim indent file
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" Language: Erlang
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" Maintainer: Csaba Hoch <csaba.hoch@gmail.com>
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" Contributor: Edwin Fine <efine145_nospam01 at usa dot net>
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" Last Change: 2008 Mar 12
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" Only load this indent file when no other was loaded.
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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 indentexpr=ErlangIndent()
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setlocal indentkeys+==after,=end,=catch,=),=],=}
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" Only define the functions once.
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if exists("*ErlangIndent")
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finish
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endif
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" The function go through the whole line, analyses it and sets the indentation
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" (ind variable).
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" l: the number of the line to be examined.
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function s:ErlangIndentAtferLine(l)
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let i = 0 " the index of the current character in the line
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let length = strlen(a:l) " the length of the line
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let ind = 0 " how much should be the difference between the indentation of
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" the current line and the indentation of the next line?
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" e.g. +1: the indentation of the next line should be equal to
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" the indentation of the current line plus one shiftwidth
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let lastFun = 0 " the last token was a 'fun'
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let lastReceive = 0 " the last token was a 'receive'; needed for 'after'
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let lastHashMark = 0 " the last token was a 'hashmark'
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while 0<= i && i < length
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" m: the next value of the i
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if a:l[i] == '%'
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break
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elseif a:l[i] == '"'
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let m = matchend(a:l,'"\%([^"\\]\|\\.\)*"',i)
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let lastReceive = 0
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elseif a:l[i] == "'"
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let m = matchend(a:l,"'[^']*'",i)
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let lastReceive = 0
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elseif a:l[i] =~# "[a-z]"
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let m = matchend(a:l,".[[:alnum:]_]*",i)
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if lastFun
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let ind = ind - 1
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let lastFun = 0
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let lastReceive = 0
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elseif a:l[(i):(m-1)] =~# '^\%(case\|if\|try\)$'
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let ind = ind + 1
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elseif a:l[(i):(m-1)] =~# '^receive$'
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let ind = ind + 1
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let lastReceive = 1
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elseif a:l[(i):(m-1)] =~# '^begin$'
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let ind = ind + 2
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let lastReceive = 0
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elseif a:l[(i):(m-1)] =~# '^end$'
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let ind = ind - 2
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let lastReceive = 0
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elseif a:l[(i):(m-1)] =~# '^after$'
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if lastReceive == 0
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let ind = ind - 1
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else
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let ind = ind + 0
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end
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let lastReceive = 0
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elseif a:l[(i):(m-1)] =~# '^fun$'
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let ind = ind + 1
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let lastFun = 1
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let lastReceive = 0
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endif
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elseif a:l[i] =~# "[A-Z_]"
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let m = matchend(a:l,".[[:alnum:]_]*",i)
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let lastReceive = 0
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elseif a:l[i] == '$'
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let m = i+2
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let lastReceive = 0
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elseif a:l[i] == "." && (i+1>=length || a:l[i+1]!~ "[0-9]")
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let m = i+1
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if lastHashMark
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let lastHashMark = 0
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else
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let ind = ind - 1
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end
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let lastReceive = 0
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elseif a:l[i] == '-' && (i+1<length && a:l[i+1]=='>')
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let m = i+2
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let ind = ind + 1
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let lastReceive = 0
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elseif a:l[i] == ';'
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let m = i+1
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let ind = ind - 1
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let lastReceive = 0
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elseif a:l[i] == '#'
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let m = i+1
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let lastHashMark = 1
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elseif a:l[i] =~# '[({[]'
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let m = i+1
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let ind = ind + 1
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let lastFun = 0
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let lastReceive = 0
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let lastHashMark = 0
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elseif a:l[i] =~# '[)}\]]'
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let m = i+1
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let ind = ind - 1
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let lastReceive = 0
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else
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let m = i+1
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endif
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let i = m
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endwhile
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return ind
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endfunction
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function s:FindPrevNonBlankNonComment(lnum)
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let lnum = prevnonblank(a:lnum)
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let line = getline(lnum)
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" continue to search above if the current line begins with a '%'
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while line =~# '^\s*%.*$'
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let lnum = prevnonblank(lnum - 1)
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if 0 == lnum
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return 0
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endif
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let line = getline(lnum)
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endwhile
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return lnum
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endfunction
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function ErlangIndent()
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" Find a non-blank line above the current line.
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let lnum = prevnonblank(v:lnum - 1)
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" Hit the start of the file, use zero indent.
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if lnum == 0
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return 0
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endif
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let prevline = getline(lnum)
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let currline = getline(v:lnum)
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let ind = indent(lnum) + &sw * s:ErlangIndentAtferLine(prevline)
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" special cases:
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if prevline =~# '^\s*\%(after\|end\)\>'
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let ind = ind + 2*&sw
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endif
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if currline =~# '^\s*end\>'
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let ind = ind - 2*&sw
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endif
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if currline =~# '^\s*after\>'
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let plnum = s:FindPrevNonBlankNonComment(v:lnum-1)
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if getline(plnum) =~# '^[^%]*\<receive\>\s*\%(%.*\)\=$'
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let ind = ind - 1*&sw
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" If the 'receive' is not in the same line as the 'after'
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else
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let ind = ind - 2*&sw
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endif
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endif
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if prevline =~# '^\s*[)}\]]'
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let ind = ind + 1*&sw
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endif
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if currline =~# '^\s*[)}\]]'
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let ind = ind - 1*&sw
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endif
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if prevline =~# '^\s*\%(catch\)\s*\%(%\|$\)'
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let ind = ind + 1*&sw
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endif
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if currline =~# '^\s*\%(catch\)\s*\%(%\|$\)'
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let ind = ind - 1*&sw
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endif
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if ind<0
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let ind = 0
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endif
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return ind
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endfunction
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" TODO:
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"
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" f() ->
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" x("foo
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" bar")
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" ,
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" bad_indent.
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"
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" fun
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" init/0,
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" bad_indent
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"
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" #rec
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" .field,
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" bad_indent
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"
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" case X of
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" 1 when A; B ->
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" bad_indent
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