221 lines
6.4 KiB
VimL
221 lines
6.4 KiB
VimL
" Vim indent file
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" Language: SML
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" Maintainer: Saikat Guha <sg266@cornell.edu>
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" Hubert Chao <hc85@cornell.edu>
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" Original OCaml Version:
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" 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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" OCaml URL: http://www.oefai.at/~markus/vim/indent/ocaml.vim
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" Last Change: 2022 Apr 06
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" 2002 Nov 06 - Some fixes (JY)
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" 2002 Oct 28 - Fixed bug with indentation of ']' (MM)
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" 2002 Oct 22 - Major rewrite (JY)
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" 2022 April: b:undo_indent added by Doug Kearns
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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=GetSMLIndent()
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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)
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setlocal nolisp
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setlocal nosmartindent
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setlocal textwidth=80
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setlocal shiftwidth=2
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let b:undo_indent = "setl et< inde< indk< lisp< si< sw< tw<"
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" Comment formatting
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if (has("comments"))
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set comments=sr:(*,mb:*,ex:*)
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set fo=cqort
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endif
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" Only define the function once.
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"if exists("*GetSMLIndent")
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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 = '\<\%(let\|sig\|struct\)\>'
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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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let lno = searchpair(a:pstart, a:pmid, a:pend, 'bW', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment"')
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if lno == -1
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return indent(lno)
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else
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return col(".") - 1
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endif
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endfunction
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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"'))
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let lno = searchpair(a:pstart, a:pmid, a:pend, 'bW', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment"')
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let moduleLine = getline(lno)
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if lno == -1 || moduleLine =~ '^\s*\(fun\|structure\|signature\)\>'
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return indent(lno)
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else
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return col(".") - 1
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endif
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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! GetSMLIndent()
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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*$'
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return ind + 2 *shiftwidth()
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elseif lline =~ '^\s*val\>.*=\s*$'
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return ind + shiftwidth()
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endif
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let line = getline(v:lnum)
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" Indent lines starting with 'end' to matching module
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if line =~ '^\s*end\>'
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return s:FindLet(s:module, '', '\<end\>')
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" Match 'else' with 'if'
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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\>', '', '\<then\>')
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else
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return ind
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endif
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" Match 'then' with 'if'
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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
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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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return s:FindPair('\[','','\]')
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" Indent current line starting with 'in' to last matching 'let'
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elseif line =~ '^\s*in\>'
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let ind = s:FindLet('\<let\>','','\<in\>')
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" Indent from last matching module if line matches:
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elseif line =~ '^\s*\(fun\|val\|open\|structure\|and\|datatype\|type\|exception\)\>'
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cursor(lnum,1)
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let lastModule = indent(searchpair(s:module, '', '\<end\>', 'bWn', 'synIDattr(synID(line("."), col("."), 0), "name") =~? "string\\|comment"'))
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if lastModule == -1
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return 0
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else
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return lastModule + shiftwidth()
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endif
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" Indent lines starting with '|' from matching 'case', 'handle'
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elseif line =~ '^\s*|'
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" cursor(lnum,1)
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let lastSwitch = search('\<\(case\|handle\|fun\|datatype\)\>','bW')
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let switchLine = getline(lastSwitch)
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let switchLineIndent = indent(lastSwitch)
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if lline =~ '^\s*|'
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return ind
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endif
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if switchLine =~ '\<case\>'
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return col(".") + 2
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elseif switchLine =~ '\<handle\>'
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return switchLineIndent + shiftwidth()
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elseif switchLine =~ '\<datatype\>'
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call search('=')
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return col(".") - 1
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else
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return switchLineIndent + 2
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endif
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" Indent if last line ends with 'sig', 'struct', 'let', 'then', 'else',
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" 'in'
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elseif lline =~ '\<\(sig\|struct\|let\|in\|then\|else\)\s*$'
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let ind = ind + shiftwidth()
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" Indent if last line ends with 'of', align from 'case'
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elseif lline =~ '\<\(of\)\s*$'
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call search('\<case\>',"bW")
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let ind = col(".")+4
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" Indent if current line starts with 'of'
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elseif line =~ '^\s*of\>'
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call search('\<case\>',"bW")
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let ind = col(".")+1
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" Indent if last line starts with 'fun', 'case', 'fn'
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elseif lline =~ '^\s*\(fun\|fn\|case\)\>'
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let ind = ind + shiftwidth()
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endif
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" Don't indent 'let' if last line started with 'fun', 'fn'
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if line =~ '^\s*let\>'
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if lline =~ '^\s*\(fun\|fn\)'
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let ind = ind - shiftwidth()
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endif
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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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