view runtime/indent/sml.vim @ 27970:212c5894b8b1 v8.2.4510

patch 8.2.4510: Vim9: shortening commands leads to confusing script Commit: https://github.com/vim/vim/commit/204852ae2adfdde10c656ca7f14e5b4207a69172 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Mar 5 12:56:44 2022 +0000 patch 8.2.4510: Vim9: shortening commands leads to confusing script Problem: Vim9: shortening commands leads to confusing script. Solution: In Vim9 script require at least ":cont" for ":continue", "const" instead of "cons", "break" instead of "brea", "catch" instead of "cat", "else" instead of "el" "elseif" instead of "elsei" "endfor" instead of "endfo" "endif" instead of "en" "endtry" instead of "endt", "finally" instead of "fina", "throw" instead of "th", "while" instead of "wh".
author Bram Moolenaar <Bram@vim.org>
date Sat, 05 Mar 2022 14:00:03 +0100
parents 63b0b7b79b25
children 6dd88e45d47d
line wrap: on
line source

" 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