" Vim indent file " Language: SML " Maintainer: Saikat Guha <sg266@cornell.edu> " Hubert Chao <hc85@cornell.edu> " Original OCaml Version: " Jean-Francois Yuen <jfyuen@ifrance.com> " Mike Leary <leary@nwlink.com> " Markus Mottl <markus@oefai.at> " OCaml URL: http://www.oefai.at/~markus/vim/indent/ocaml.vim " Last Change: 2003 Jan 04 - Adapted to SML " 2002 Nov 06 - Some fixes (JY) " 2002 Oct 28 - Fixed bug with indentation of ']' (MM) " 2002 Oct 22 - Major rewrite (JY) " 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=GetSMLIndent() setlocal indentkeys+=0=and,0=else,0=end,0=handle,0=if,0=in,0=let,0=then,0=val,0=fun,0=\|,0=*),0) setlocal nolisp setlocal nosmartindent setlocal textwidth=80 setlocal shiftwidth=2 " Comment formatting if (has("comments")) set comments=sr:(*,mb:*,ex:*) set fo=cqort endif " Only define the function once. "if exists("*GetSMLIndent") "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 = '\<\%(let\|sig\|struct\)\>' let s:obj = '^\s*\(constraint\|inherit\|initializer\|method\|val\)\>\|\<\(object\|object\s*(.*)\)\s*$' let s:type = '^\s*\%(let\|type\)\>.*=' let s:val = '^\s*\(val\|external\)\>.*:' " Skipping pattern, for comments function! s:SkipPattern(lnum, pat) let def = prevnonblank(a:lnum - 1) while def > 0 && getline(def) =~ a:pat let def = prevnonblank(def - 1) endwhile return def 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:SkipPattern(llet, '^\s*(\*.*\*)\s*$') 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"')) let lno = searchpair(a:pstart, a:pmid, a:pend, 'bW', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment"') if lno == -1 return indent(lno) else return col(".") - 1 endif endfunction 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"')) let lno = searchpair(a:pstart, a:pmid, a:pend, 'bW', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment"') let moduleLine = getline(lno) if lno == -1 || moduleLine =~ '^\s*\(fun\|structure\|signature\)\>' return indent(lno) else return col(".") - 1 endif 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*$" || getline(prevnonblank(".") - 1) =~ "^\\s*let\\>.*=\\s*$\\|" . s:beflet')) "endfunction function! GetSMLIndent() " Find a non-blank line above the current line. let lnum = prevnonblank(v:lnum - 1) " At the start of the file use zero indent. if lnum == 0 return 0 endif let ind = indent(lnum) let lline = getline(lnum) " Return double 'shiftwidth' after lines matching: if lline =~ '^\s*|.*=>\s*$' return ind + 2 *shiftwidth() elseif lline =~ '^\s*val\>.*=\s*$' return ind + shiftwidth() endif let line = getline(v:lnum) " Indent lines starting with 'end' to matching module if line =~ '^\s*end\>' return s:FindLet(s:module, '', '\<end\>') " Match 'else' with 'if' elseif line =~ '^\s*else\>' if lline !~ '^\s*\(if\|else\|then\)\>' return s:FindPair('\<if\>', '', '\<then\>') else return ind endif " Match 'then' with 'if' elseif line =~ '^\s*then\>' if lline !~ '^\s*\(if\|else\|then\)\>' return s:FindPair('\<if\>', '', '\<then\>') else return ind endif " Indent if current line begins with ']' elseif line =~ '^\s*\]' return s:FindPair('\[','','\]') " Indent current line starting with 'in' to last matching 'let' elseif line =~ '^\s*in\>' let ind = s:FindLet('\<let\>','','\<in\>') " Indent from last matching module if line matches: elseif line =~ '^\s*\(fun\|val\|open\|structure\|and\|datatype\|type\|exception\)\>' cursor(lnum,1) let lastModule = indent(searchpair(s:module, '', '\<end\>', 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment"')) if lastModule == -1 return 0 else return lastModule + shiftwidth() endif " Indent lines starting with '|' from matching 'case', 'handle' elseif line =~ '^\s*|' " cursor(lnum,1) let lastSwitch = search('\<\(case\|handle\|fun\|datatype\)\>','bW') let switchLine = getline(lastSwitch) let switchLineIndent = indent(lastSwitch) if lline =~ '^\s*|' return ind endif if switchLine =~ '\<case\>' return col(".") + 2 elseif switchLine =~ '\<handle\>' return switchLineIndent + shiftwidth() elseif switchLine =~ '\<datatype\>' call search('=') return col(".") - 1 else return switchLineIndent + 2 endif " Indent if last line ends with 'sig', 'struct', 'let', 'then', 'else', " 'in' elseif lline =~ '\<\(sig\|struct\|let\|in\|then\|else\)\s*$' let ind = ind + shiftwidth() " Indent if last line ends with 'of', align from 'case' elseif lline =~ '\<\(of\)\s*$' call search('\<case\>',"bW") let ind = col(".")+4 " Indent if current line starts with 'of' elseif line =~ '^\s*of\>' call search('\<case\>',"bW") let ind = col(".")+1 " Indent if last line starts with 'fun', 'case', 'fn' elseif lline =~ '^\s*\(fun\|fn\|case\)\>' let ind = ind + shiftwidth() endif " Don't indent 'let' if last line started with 'fun', 'fn' if line =~ '^\s*let\>' if lline =~ '^\s*\(fun\|fn\)' let ind = ind - shiftwidth() endif endif return ind endfunction " vim:sw=2