--- /dev/null
+" Vim indent file
+" Language: OCaml
+" Maintainers: Jean-Francois Yuen <jfyuen@happycoders.org>
+" Mike Leary <leary@nwlink.com>
+" Markus Mottl <markus.mottl@gmail.com>
+" URL: http://www.ocaml.info/vim/indent/ocaml.vim
+" Last Change: 2005 Jun 25 - Fixed multiple bugs due to 'else\nreturn ind' working
+" 2005 May 09 - Added an option to not indent OCaml-indents specially (MM)
+" 2005 Apr 11 - Fixed an indentation bug concerning "let" (MM)
+
+" Only load this indent file when no other was loaded.
+if exists("b:did_indent")
+ finish
+endif
+let b:did_indent = 1
+
+setlocal expandtab
+setlocal indentexpr=GetOCamlIndent()
+setlocal indentkeys+=0=and,0=class,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)
+setlocal nolisp
+setlocal nosmartindent
+setlocal textwidth=80
+
+" Comment formatting
+if !exists("no_ocaml_comments")
+ if (has("comments"))
+ setlocal comments=sr:(*,mb:*,ex:*)
+ setlocal fo=cqort
+ endif
+endif
+
+" Only define the function once.
+if exists("*GetOCamlIndent")
+ finish
+endif
+
+" Define some patterns:
+let s:beflet = '^\s*\(initializer\|method\|try\)\|\(\<\(begin\|do\|else\|in\|then\|try\)\|->\|<-\|=\|;\|(\)\s*$'
+let s:letpat = '^\s*\(let\|type\|module\|class\|open\|exception\|val\|include\|external\)\>'
+let s:letlim = '\(\<\(sig\|struct\)\|;;\)\s*$'
+let s:lim = '^\s*\(exception\|external\|include\|let\|module\|open\|type\|val\)\>'
+let s:module = '\<\%(begin\|sig\|struct\|object\)\>'
+let s:obj = '^\s*\(constraint\|inherit\|initializer\|method\|val\)\>\|\<\(object\|object\s*(.*)\)\s*$'
+let s:type = '^\s*\%(class\|let\|type\)\>.*='
+
+" Skipping pattern, for comments
+function s:GetLineWithoutFullComment(lnum)
+ let lnum = prevnonblank(a:lnum - 1)
+ let lline = substitute(getline(lnum), '(\*.*\*)\s*$', '', '')
+ while lline =~ '^\s*$' && lnum > 0
+ let lnum = prevnonblank(lnum - 1)
+ let lline = substitute(getline(lnum), '(\*.*\*)\s*$', '', '')
+ endwhile
+ return lnum
+endfunction
+
+" Indent for ';;' to match multiple 'let'
+function s:GetInd(lnum, pat, lim)
+ let llet = search(a:pat, 'bW')
+ let old = indent(a:lnum)
+ while llet > 0
+ let old = indent(llet)
+ let nb = s:GetLineWithoutFullComment(llet)
+ if getline(nb) =~ a:lim
+ return old
+ endif
+ let llet = search(a:pat, 'bW')
+ endwhile
+ return old
+endfunction
+
+" Indent pairs
+function s:FindPair(pstart, pmid, pend)
+ call search(a:pend, 'bW')
+ return indent(searchpair(a:pstart, a:pmid, a:pend, 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment"'))
+endfunction
+
+" Indent 'let'
+function s:FindLet(pstart, pmid, pend)
+ call search(a:pend, 'bW')
+ return indent(searchpair(a:pstart, a:pmid, a:pend, 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment" || getline(".") =~ "^\\s*let\\>.*=.*\\<in\\s*$" || getline(prevnonblank(".") - 1) =~ s:beflet'))
+endfunction
+
+function GetOCamlIndent()
+ " Find a non-commented line above the current line.
+ let lnum = s:GetLineWithoutFullComment(v:lnum)
+
+ " At the start of the file use zero indent.
+ if lnum == 0
+ return 0
+ endif
+
+ let ind = indent(lnum)
+ let lline = substitute(getline(lnum), '(\*.*\*)\s*$', '', '')
+
+ " Return double 'shiftwidth' after lines matching:
+ if lline =~ '^\s*|.*->\s*$'
+ return ind + &sw + &sw
+ endif
+
+ let line = getline(v:lnum)
+
+ " Indent if current line begins with 'end':
+ if line =~ '^\s*end\>'
+ return s:FindPair(s:module, '','\<end\>')
+
+ " Indent if current line begins with 'done' for 'do':
+ elseif line =~ '^\s*done\>'
+ return s:FindPair('\<do\>', '','\<done\>')
+
+ " Indent if current line begins with '}' or '>}':
+ elseif line =~ '^\s*\(\|>\)}'
+ return s:FindPair('{', '','}')
+
+ " Indent if current line begins with ']', '|]' or '>]':
+ elseif line =~ '^\s*\(\||\|>\)\]'
+ return s:FindPair('\[', '','\]')
+
+ " Indent if current line begins with ')':
+ elseif line =~ '^\s*)'
+ return s:FindPair('(', '',')')
+
+ " Indent if current line begins with 'let':
+ elseif line =~ '^\s*let\>'
+ if lline !~ s:lim . '\|' . s:letlim . '\|' . s:beflet
+ return s:FindLet(s:type, '','\<let\s*$')
+ endif
+
+ " Indent if current line begins with 'class' or 'type':
+ elseif line =~ '^\s*\(class\|type\)\>'
+ if lline !~ s:lim . '\|\<and\s*$\|' . s:letlim
+ return s:FindLet(s:type, '','\<\(class\|type\)\s*$')
+ endif
+
+ " Indent for pattern matching:
+ elseif line =~ '^\s*|'
+ if lline !~ '^\s*\(|[^\]]\|\(match\|type\|with\)\>\)\|\<\(function\|parser\|private\|with\)\s*$'
+ call search('|', 'bW')
+ return indent(searchpair('^\s*\(match\|type\)\>\|\<\(function\|parser\|private\|with\)\s*$', '', '^\s*|', 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment" || getline(".") !~ "^\\s*|.*->"'))
+ endif
+
+ " Indent if current line begins with ';;':
+ elseif line =~ '^\s*;;'
+ if lline !~ ';;\s*$'
+ return s:GetInd(v:lnum, s:letpat, s:letlim)
+ endif
+
+ " Indent if current line begins with 'in':
+ elseif line =~ '^\s*in\>'
+ if lline !~ '^\s*\(let\|and\)\>'
+ return s:FindPair('\<let\>', '', '\<in\>')
+ endif
+
+ " Indent if current line begins with 'else':
+ elseif line =~ '^\s*else\>'
+ if lline !~ '^\s*\(if\|then\)\>'
+ return s:FindPair('\<if\>', '', '\<else\>')
+ endif
+
+ " Indent if current line begins with 'then':
+ elseif line =~ '^\s*then\>'
+ if lline !~ '^\s*\(if\|else\)\>'
+ return s:FindPair('\<if\>', '', '\<then\>')
+ endif
+
+ " Indent if current line begins with 'and':
+ elseif line =~ '^\s*and\>'
+ if lline !~ '^\s*\(and\|let\|type\)\>\|\<end\s*$'
+ return ind - &sw
+ endif
+
+ " Indent if current line begins with 'with':
+ elseif line =~ '^\s*with\>'
+ if lline !~ '^\s*\(match\|try\)\>'
+ return s:FindPair('\<\%(match\|try\)\>', '','\<with\>')
+ endif
+
+ " Indent if current line begins with 'exception', 'external', 'include' or
+ " 'open':
+ elseif line =~ '^\s*\(exception\|external\|include\|open\)\>'
+ if lline !~ s:lim . '\|' . s:letlim
+ call search(line)
+ return indent(search('^\s*\(\(exception\|external\|include\|open\|type\)\>\|val\>.*:\)', 'bW'))
+ endif
+
+ " Indent if current line begins with 'val':
+ elseif line =~ '^\s*val\>'
+ if lline !~ '^\s*\(exception\|external\|include\|open\)\>\|' . s:obj . '\|' . s:letlim
+ return indent(search('^\s*\(\(exception\|include\|initializer\|method\|open\|type\|val\)\>\|external\>.*:\)', 'bW'))
+ endif
+
+ " Indent if current line begins with 'constraint', 'inherit', 'initializer'
+ " or 'method':
+ elseif line =~ '^\s*\(constraint\|inherit\|initializer\|method\)\>'
+ if lline !~ s:obj
+ return indent(search('\<\(object\|object\s*(.*)\)\s*$', 'bW')) + &sw
+ endif
+
+ endif
+
+ " Add a 'shiftwidth' after lines ending with:
+ if lline =~ '\(:\|=\|->\|<-\|(\|\[\|{\|{<\|\[|\|\[<\|\<\(begin\|do\|else\|fun\|function\|functor\|if\|initializer\|object\|parser\|private\|sig\|struct\|then\|try\)\|\<object\s*(.*)\)\s*$'
+ let ind = ind + &sw
+
+ " Back to normal indent after lines ending with ';;':
+ elseif lline =~ ';;\s*$' && lline !~ '^\s*;;'
+ let ind = s:GetInd(v:lnum, s:letpat, s:letlim)
+
+ " Back to normal indent after lines ending with 'end':
+ elseif lline =~ '\<end\s*$'
+ let ind = s:FindPair(s:module, '','\<end\>')
+
+ " Back to normal indent after lines ending with 'in':
+ elseif lline =~ '\<in\s*$' && lline !~ '^\s*in\>'
+ let ind = s:FindPair('\<let\>', '', '\<in\>')
+
+ " Back to normal indent after lines ending with 'done':
+ elseif lline =~ '\<done\s*$'
+ let ind = s:FindPair('\<do\>', '','\<done\>')
+
+ " Back to normal indent after lines ending with '}' or '>}':
+ elseif lline =~ '\(\|>\)}\s*$'
+ let ind = s:FindPair('{', '','}')
+
+ " Back to normal indent after lines ending with ']', '|]' or '>]':
+ elseif lline =~ '\(\||\|>\)\]\s*$'
+ let ind = s:FindPair('\[', '','\]')
+
+ " Back to normal indent after comments:
+ elseif lline =~ '\*)\s*$'
+ call search('\*)', 'bW')
+ let ind = indent(searchpair('(\*', '', '\*)', 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string"'))
+
+ " Back to normal indent after lines ending with ')':
+ elseif lline =~ ')\s*$'
+ let ind = s:FindPair('(', '',')')
+
+ " If this is a multiline comment then align '*':
+ elseif lline =~ '^\s*(\*' && line =~ '^\s*\*'
+ let ind = ind + 1
+
+ endif
+
+ " Subtract a 'shiftwidth' after lines matching 'match ... with parser':
+ if lline =~ '\<match\>.*\<with\>\s*\<parser\s*$'
+ let ind = ind - &sw
+ endif
+
+ return ind
+
+endfunction
+
+" vim:sw=2
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