mirror of
https://github.com/vim/vim
synced 2025-03-17 15:27:08 +01:00
311 lines
10 KiB
VimL
311 lines
10 KiB
VimL
" Vim indent file
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" Language: OCaml
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" Maintainers: Jean-Francois Yuen <jfyuen@ifrance.com>
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" Mike Leary <leary@nwlink.com>
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" Markus Mottl <markus@oefai.at>
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" URL: http://www.oefai.at/~markus/vim/indent/ocaml.vim
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" Last Change: 2003 Apr 14
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" 2003 Mar 05 - Added '{<' and some fixes (JY)
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" 2002 Nov 06 - Some fixes (JY)
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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 expandtab
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setlocal indentexpr=GetOCamlIndent()
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setlocal indentkeys+=0=and,0=constraint,0=done,0=else,0=end,0=exception,0=external,0=if,0=in,0=include,0=inherit,0=initializer,0=let,0=method,0=open,0=then,0=type,0=val,0=with,0=;;,0=>\],0=\|\],0=\|,0=*),0=>},0},0\],0)
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setlocal nolisp
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setlocal nosmartindent
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setlocal textwidth=80
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" Comment formatting
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if (has("comments"))
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setlocal comments=sr:(*,mb:*,ex:*)
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setlocal fo=cqort
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endif
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" Only define the function once.
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if exists("*GetOCamlIndent")
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finish
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endif
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" Define some patterns:
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let s:beflet = '^\s*\(initializer\|method\|try\)\|\(\<\(begin\|do\|else\|in\|then\|try\)\|->\|;\|(\)\s*$'
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let s:letpat = '^\s*\(let\|type\|module\|class\|open\|exception\|val\|include\|external\)\>'
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let s:letlim = '\(\<\(sig\|struct\)\|;;\)\s*$'
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let s:lim = '^\s*\(exception\|external\|include\|let\|module\|open\|type\|val\)\>'
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let s:module = '\<\%(begin\|sig\|struct\|object\)\>'
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let s:obj = '^\s*\(constraint\|inherit\|initializer\|method\|val\)\>\|\<\(object\|object\s*(.*)\)\s*$'
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let s:type = '^\s*\%(let\|type\)\>.*='
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let s:val = '^\s*\(val\|external\)\>.*:'
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" Skipping pattern, for comments
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function s:SkipPattern(lnum, pat)
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let def = prevnonblank(a:lnum - 1)
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while def > 0 && getline(def) =~ a:pat
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let def = prevnonblank(def - 1)
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endwhile
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return def
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endfunction
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" Indent for ';;' to match multiple 'let'
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function s:GetInd(lnum, pat, lim)
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let llet = search(a:pat, 'bW')
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let old = indent(a:lnum)
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while llet > 0
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let old = indent(llet)
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let nb = s:SkipPattern(llet, '^\s*(\*.*\*)\s*$')
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if getline(nb) =~ a:lim
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return old
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endif
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let llet = search(a:pat, 'bW')
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endwhile
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return old
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endfunction
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" Indent pairs
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function s:FindPair(pstart, pmid, pend)
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call search(a:pend, 'bW')
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return indent(searchpair(a:pstart, a:pmid, a:pend, 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment"'))
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endfunction
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" Indent 'let'
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function s:FindLet(pstart, pmid, pend)
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call search(a:pend, 'bW')
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return indent(searchpair(a:pstart, a:pmid, a:pend, 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment" || getline(".") =~ "^\\s*let\\>.*=.*\\<in\\s*$" || getline(prevnonblank(".") - 1) =~ "^\\s*let\\>.*=\\s*$\\|" . s:beflet'))
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endfunction
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function GetOCamlIndent()
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" Find a non-blank line above the current line.
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let lnum = prevnonblank(v:lnum - 1)
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" At the start of the file use zero indent.
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if lnum == 0
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return 0
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endif
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let ind = indent(lnum)
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let lline = getline(lnum)
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" Return double 'shiftwidth' after lines matching:
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if lline =~ '^\s*|.*->\s*$'
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return ind + &sw + &sw
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endif
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let line = getline(v:lnum)
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" Indent if current line begins with 'end'
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" for 'sig', 'struct', 'object' and 'begin':
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if line =~ '^\s*end\>'
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return s:FindPair(s:module, '','\<end\>')
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" Indent if current line begins with 'done' for 'do':
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elseif line =~ '^\s*done\>'
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return s:FindPair('\<do\>', '','\<done\>')
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" Indent if current line begins with '}' or '>}':
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elseif line =~ '^\s*\(\|>\)}'
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return s:FindPair('{', '','}')
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" Indent if current line begins with ']', '|]' or '>]':
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elseif line =~ '^\s*\(\||\|>\)\]'
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return s:FindPair('\[', '','\]')
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" Indent if current line begins with ')':
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elseif line =~ '^\s*)'
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return s:FindPair('(', '',')')
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" Indent if current line begins with 'let'
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" and last line does not begin with 'let' or end with 'in' or ';;':
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elseif line =~ '^\s*let\>'
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if lline !~ s:lim . '\|' . s:letlim . '\|' . s:beflet
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return s:FindLet(s:type, '','\<let\s*$')
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else return ind
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endif
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" Indent if current line begins with 'type'
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" and last line does not end with 'and' or ';;':
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elseif line =~ '^\s*type\>'
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if lline !~ s:lim . '\|\<and\s*$\|' . s:letlim
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return s:FindLet(s:type, '','\<type\s*$')
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else return ind
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endif
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" Indent for pattern matching:
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elseif line =~ '^\s*|'
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if lline !~ '^\s*\(|\|\(match\|with\|type\)\>\)\|\<\(function\|parser\|with\)\s*$'
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call search('|', 'bW')
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return indent(searchpair('^\s*\(type\|match\)\>\|\<\(with\|function\|parser\)\s*$', '', '|', 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment" || getline(".") =~ "\\[|\\||\\]" && getline(".") !~ "^\\s*|.*->"'))
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else return ind
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endif
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" Indent if current line begins with ';;':
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elseif line =~ '^\s*;;'
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if lline !~ ';;\s*$'
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return s:GetInd(v:lnum, s:letpat, s:letlim)
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else return ind
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endif
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" Indent if current line begins with 'in' and previous
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" line does not start with 'let' or 'and':
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elseif line =~ '^\s*in\>'
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if lline !~ '^\s*\(let\|and\)\>'
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return s:FindPair('\<let\>', '', '\<in\>')
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else return ind
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endif
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" Indent if current line begins with 'else'
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" and previous line does not start with 'if', 'then' or 'else':
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elseif line =~ '^\s*else\>'
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if lline !~ '^\s*\(if\|else\|then\)\>'
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return s:FindPair('\<if\>', '', '\<else\>')
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else return ind
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endif
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" Indent if current line begins with 'then'
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" and previous line does not start with 'if', 'then' or 'else':
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elseif line =~ '^\s*then\>'
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if lline !~ '^\s*\(if\|else\|then\)\>'
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return s:FindPair('\<if\>', '', '\<then\>')
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else return ind
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endif
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" Subtract a 'shiftwidth' if current line begins with 'and' and previous
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" line does not start with 'let', 'and' or 'type' or end with 'end'
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" (for classes):
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elseif line =~ '^\s*and\>'
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if lline !~ '^\s*\(and\|let\|type\)\>\|\<end\s*$'
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return ind - &sw
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else return ind
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endif
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" Indent if current line begins with 'with'
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" and previous line does not start with 'match' or 'try':
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elseif line =~ '^\s*with\>'
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if lline !~ '^\s*\(match\|try\)\>'
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return s:FindPair('\<\%(match\|try\)\>', '','\<with\>')
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else return ind
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endif
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" Indent if current line begins with 'exception':
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elseif line =~ '^\s*exception\>'
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if lline !~ s:lim . '\|' . s:letlim
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return indent(search(s:val . '\|^\s*\(external\|include\|open\|type\)\>', 'bW'))
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else return ind
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endif
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" Indent if current line begins with 'external':
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elseif line =~ '^\s*external\>'
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if lline !~ s:lim . '\|' . s:letlim
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return indent(search(s:val . '\|^\s*\(exception\|include\|open\|type\)\>', 'bW'))
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else return ind
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endif
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" Indent if current line begins with 'include':
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elseif line =~ '^\s*include\>'
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if lline !~ s:lim . '\|' . s:letlim
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return indent(search(s:val . '\|^\s*\(exception\|external\|open\|type\)\>', 'bW'))
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else return ind
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endif
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" Indent if current line begins with 'open':
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elseif line =~ '^\s*open\>'
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if lline !~ s:lim . '\|' . s:letlim
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return indent(search(s:val . '\|^\s*\(exception\|external\|include\|type\)\>', 'bW'))
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else return ind
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endif
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" Indent if current line begins with 'val':
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elseif line =~ '^\s*val\>'
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if lline !~ '^\s*\(exception\|external\|include\|open\)\>\|' . s:obj . '\|' . s:letlim
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return indent(search(s:val . '\|^\s*\(exception\|include\|initializer\|method\|open\|type\)\>', 'bW'))
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else return ind
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endif
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" Indent if current line begins with 'constraint':
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elseif line =~ '^\s*constraint\>'
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if lline !~ s:obj
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return indent(search('^\s*\(inherit\|initializer\|method\|val\)\>', 'bW'))
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else return ind
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endif
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" Indent if current line begins with 'inherit':
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elseif line =~ '^\s*inherit\>'
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if lline !~ s:obj
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return indent(search('^\s*\(constraint\|initializer\|method\|val\)\>', 'bW'))
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else return ind
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endif
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" Indent if current line begins with 'inherit':
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elseif line =~ '^\s*initializer\>'
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if lline !~ s:obj
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return indent(search('^\s*\(constraint\|inherit\|method\|val\)\>', 'bW'))
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else return ind
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endif
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" Indent if current line begins with 'method':
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elseif line =~ '^\s*method\>'
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if lline !~ s:obj
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return indent(search('^\s*\(\(constraint\|inherit\|initializer\|val\)\>\|method\>.*\(:\|=\)\)', 'bW'))
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else return ind
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endif
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" Indent back to normal after comments:
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elseif line =~ '^\s*\*)'
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call search('\*)', 'bW')
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return indent(searchpair('(\*', '', '\*)', 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string"'))
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endif
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" Add a 'shiftwidth' after lines ending with:
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if lline =~ '\(:\|=\|->\|<-\|(\|\[\|{\|{<\|\[|\|\[<\|\<\(begin\|struct\|sig\|functor\|initializer\|object\|try\|do\|if\|then\|else\|fun\|function\|parser\)\|\<object\s*(.*)\)\s*$'
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let ind = ind + &sw
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" Back to normal indent after lines ending with ';;':
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elseif lline =~ ';;\s*$' && lline !~ '^\s*;;'
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let ind = s:GetInd(v:lnum, s:letpat, s:letlim)
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" Back to normal indent after lines ending with 'end':
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elseif lline =~ '\<end\s*$'
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let ind = s:FindPair(s:module, '','\<end\>')
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" Back to normal indent after lines ending with 'in':
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elseif lline =~ '\<in\s*$' && lline !~ '^\s*in\>'
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let ind = s:FindPair('\<let\>', '', '\<in\>')
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" Back to normal indent after lines ending with 'done':
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elseif lline =~ '\<done\s*$'
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let ind = s:FindPair('\<do\>', '','\<done\>')
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" Back to normal indent after lines ending with '}' or '>}':
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elseif lline =~ '\(\|>\)}\s*$'
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let ind = s:FindPair('{', '','}')
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" Back to normal indent after lines ending with ']', '|]' or '>]':
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elseif lline =~ '\(\||\|>\)\]\s*$'
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let ind = s:FindPair('\[', '','\]')
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" Back to normal indent after comments:
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elseif lline =~ '\*)\s*$'
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call search('\*)', 'bW')
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let ind = indent(searchpair('(\*', '', '\*)', 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string"'))
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" Back to normal indent after lines ending with ')':
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elseif lline =~ ')\s*$'
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let ind = s:FindPair('(', '',')')
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endif
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" Subtract a 'shiftwidth' after lines matching 'match ... with parser':
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if lline =~ '^\s*match\>.*\<with\>\s*\<parser\s*$'
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let ind = ind - &sw
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endif
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return ind
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endfunction
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" vim:sw=2
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