Adding upstream version 2:8.1.0875.upstream/2%8.1.0875upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

13 files changed, 3095 insertions, 0 deletions

diff --git a/runtime/pack/dist/opt/cfilter/plugin/cfilter.vim b/runtime/pack/dist/opt/cfilter/plugin/cfilter.vim
new file mode 100644
index 0000000..fe4455f
--- /dev/null
+++ b/runtime/pack/dist/opt/cfilter/plugin/cfilter.vim
@@ -0,0 +1,62 @@
+" cfilter.vim: Plugin to filter entries from a quickfix/location list
+" Last Change: Aug 23, 2018
+" Maintainer: Yegappan Lakshmanan (yegappan AT yahoo DOT com)
+" Version: 1.1
+"
+" Commands to filter the quickfix list:
+"   :Cfilter[!] /{pat}/
+"       Create a new quickfix list from entries matching {pat} in the current
+"       quickfix list. Both the file name and the text of the entries are
+"       matched against {pat}. If ! is supplied, then entries not matching
+"       {pat} are used. The pattern can be optionally enclosed using one of
+"       the following characters: ', ", /. If the pattern is empty, then the
+"       last used search pattern is used.
+"   :Lfilter[!] /{pat}/
+"       Same as :Cfilter but operates on the current location list.
+"
+if exists("loaded_cfilter")
+    finish
+endif
+let loaded_cfilter = 1
+
+func s:Qf_filter(qf, searchpat, bang)
+    if a:qf
+	let Xgetlist = function('getqflist')
+	let Xsetlist = function('setqflist')
+	let cmd = ':Cfilter' . a:bang
+    else
+	let Xgetlist = function('getloclist', [0])
+	let Xsetlist = function('setloclist', [0])
+	let cmd = ':Lfilter' . a:bang
+    endif
+
+    let firstchar = a:searchpat[0]
+    let lastchar = a:searchpat[-1:]
+    if firstchar == lastchar &&
+		\ (firstchar == '/' || firstchar == '"' || firstchar == "'")
+	let pat = a:searchpat[1:-2]
+	if pat == ''
+	    " Use the last search pattern
+	    let pat = @/
+	endif
+    else
+	let pat = a:searchpat
+    endif
+
+    if pat == ''
+	return
+    endif
+
+    if a:bang == '!'
+	let cond = 'v:val.text !~# pat && bufname(v:val.bufnr) !~# pat'
+    else
+	let cond = 'v:val.text =~# pat || bufname(v:val.bufnr) =~# pat'
+    endif
+
+    let items = filter(Xgetlist(), cond)
+    let title = cmd . ' /' . pat . '/'
+    call Xsetlist([], ' ', {'title' : title, 'items' : items})
+endfunc
+
+com! -nargs=+ -bang Cfilter call s:Qf_filter(1, <q-args>, <q-bang>)
+com! -nargs=+ -bang Lfilter call s:Qf_filter(0, <q-args>, <q-bang>)
diff --git a/runtime/pack/dist/opt/dvorak/dvorak/disable.vim b/runtime/pack/dist/opt/dvorak/dvorak/disable.vim
new file mode 100644
index 0000000..1e9b070
--- /dev/null
+++ b/runtime/pack/dist/opt/dvorak/dvorak/disable.vim
@@ -0,0 +1,72 @@
+" Back to Qwerty keyboard after using Dvorak.
+
+iunmap a
+iunmap b
+iunmap c
+iunmap d
+iunmap e
+iunmap f
+iunmap g
+iunmap h
+iunmap i
+iunmap j
+iunmap k
+iunmap l
+iunmap m
+iunmap n
+iunmap o
+iunmap p
+iunmap q
+iunmap r
+iunmap s
+iunmap t
+iunmap u
+iunmap v
+iunmap w
+iunmap x
+iunmap y
+iunmap z
+iunmap ;
+iunmap '
+iunmap "
+iunmap ,
+iunmap .
+iunmap /
+iunmap A
+iunmap B
+iunmap C
+iunmap D
+iunmap E
+iunmap F
+iunmap G
+iunmap H
+iunmap I
+iunmap J
+iunmap K
+iunmap L
+iunmap M
+iunmap N
+iunmap O
+iunmap P
+iunmap Q
+iunmap R
+iunmap S
+iunmap T
+iunmap U
+iunmap V
+iunmap W
+iunmap X
+iunmap Y
+iunmap Z
+iunmap <
+iunmap >
+iunmap ?
+iunmap :
+iunmap [
+iunmap ]
+iunmap {
+iunmap }
+iunmap -
+iunmap _
+iunmap =
+iunmap +
diff --git a/runtime/pack/dist/opt/dvorak/dvorak/enable.vim b/runtime/pack/dist/opt/dvorak/dvorak/enable.vim
new file mode 100644
index 0000000..8ff363f
--- /dev/null
+++ b/runtime/pack/dist/opt/dvorak/dvorak/enable.vim
@@ -0,0 +1,77 @@
+" Dvorak keyboard, only in Insert mode.
+"
+" Change "inoremap" to "map!" to also use in Ex mode.
+" Also change disable.vim then: "iunmap" to "unmap!".
+"
+" You may want to add a list of map's too.
+
+inoremap a a
+inoremap b x
+inoremap c j
+inoremap d e
+inoremap e .
+inoremap f u
+inoremap g i
+inoremap h d
+inoremap i c
+inoremap j h
+inoremap k t
+inoremap l n
+inoremap m m
+inoremap n b
+inoremap o r
+inoremap p l
+inoremap q '
+inoremap r p
+inoremap s o
+inoremap t y
+inoremap u g
+inoremap v k
+inoremap w ,
+inoremap x q
+inoremap y f
+inoremap z ;
+inoremap ; s
+inoremap ' -
+inoremap " _
+inoremap , w
+inoremap . v
+inoremap / z
+inoremap A A
+inoremap B X
+inoremap C J
+inoremap D E
+inoremap E >
+inoremap F U
+inoremap G I
+inoremap H D
+inoremap I C
+inoremap J H
+inoremap K T
+inoremap L N
+inoremap M M
+inoremap N B
+inoremap O R
+inoremap P L
+inoremap Q "
+inoremap R P
+inoremap S O
+inoremap T Y
+inoremap U G
+inoremap V K
+inoremap W <
+inoremap X Q
+inoremap Y F
+inoremap Z :
+inoremap < W
+inoremap > V
+inoremap ? Z
+inoremap : S
+inoremap [ /
+inoremap ] =
+inoremap { ?
+inoremap } +
+inoremap - [
+inoremap _ {
+inoremap = ]
+inoremap + }
diff --git a/runtime/pack/dist/opt/dvorak/plugin/dvorak.vim b/runtime/pack/dist/opt/dvorak/plugin/dvorak.vim
new file mode 100644
index 0000000..c8d5d5c
--- /dev/null
+++ b/runtime/pack/dist/opt/dvorak/plugin/dvorak.vim
@@ -0,0 +1,16 @@
+" When using a dvorak keyboard this file may be of help to you.
+" These mappings have been made by Lawrence Kesteloot <kesteloo@cs.unc.edu>.
+" What they do is that the most often used keys, like hjkl, are put in a more
+" easy to use position.
+" It may take some time to learn using this.
+
+if exists("g:loaded_dvorak_plugin")
+  finish
+endif
+let g:loaded_dvorak_plugin = 1
+
+" Key to go into dvorak mode:
+map ,d :runtime dvorak/enable.vim<CR>
+
+" Key to get out of dvorak mode:
+map ,q :runtime dvorak/disable.vim<CR>
diff --git a/runtime/pack/dist/opt/editexisting/plugin/editexisting.vim b/runtime/pack/dist/opt/editexisting/plugin/editexisting.vim
new file mode 100644
index 0000000..d9877a0
--- /dev/null
+++ b/runtime/pack/dist/opt/editexisting/plugin/editexisting.vim
@@ -0,0 +1,114 @@
+" Vim Plugin:	Edit the file with an existing Vim if possible
+" Maintainer:	Bram Moolenaar
+" Last Change:	2016 Mar 28
+
+" To use add ":packadd! editexisting" in your vimrc file.
+
+" This plugin serves two purposes:
+" 1. On startup, if we were invoked with one file name argument and the file
+"    is not modified then try to find another Vim instance that is editing
+"    this file.  If there is one then bring it to the foreground and exit.
+" 2. When a file is edited and a swap file exists for it, try finding that
+"    other Vim and bring it to the foreground.  Requires Vim 7, because it
+"    uses the SwapExists autocommand event.
+
+" Function that finds the Vim instance that is editing "filename" and brings
+" it to the foreground.
+func s:EditElsewhere(filename)
+  let fname_esc = substitute(a:filename, "'", "''", "g")
+
+  let servers = serverlist()
+  while servers != ''
+    " Get next server name in "servername"; remove it from "servers".
+    let i = match(servers, "\n")
+    if i == -1
+      let servername = servers
+      let servers = ''
+    else
+      let servername = strpart(servers, 0, i)
+      let servers = strpart(servers, i + 1)
+    endif
+
+    " Skip ourselves.
+    if servername ==? v:servername
+      continue
+    endif
+
+    " Check if this server is editing our file.
+    if remote_expr(servername, "bufloaded('" . fname_esc . "')")
+      " Yes, bring it to the foreground.
+      if has("win32")
+	call remote_foreground(servername)
+      endif
+      call remote_expr(servername, "foreground()")
+
+      if remote_expr(servername, "exists('*EditExisting')")
+	" Make sure the file is visible in a window (not hidden).
+	" If v:swapcommand exists and is set, send it to the server.
+	if exists("v:swapcommand")
+	  let c = substitute(v:swapcommand, "'", "''", "g")
+	  call remote_expr(servername, "EditExisting('" . fname_esc . "', '" . c . "')")
+	else
+	  call remote_expr(servername, "EditExisting('" . fname_esc . "', '')")
+	endif
+      endif
+
+      if !(has('vim_starting') && has('gui_running') && has('gui_win32'))
+	" Tell the user what is happening.  Not when the GUI is starting
+	" though, it would result in a message box.
+	echomsg "File is being edited by " . servername
+	sleep 2
+      endif
+      return 'q'
+    endif
+  endwhile
+  return ''
+endfunc
+
+" When the plugin is loaded and there is one file name argument: Find another
+" Vim server that is editing this file right now.
+if argc() == 1 && !&modified
+  if s:EditElsewhere(expand("%:p")) == 'q'
+    quit
+  endif
+endif
+
+" Setup for handling the situation that an existing swap file is found.
+try
+  au! SwapExists * let v:swapchoice = s:EditElsewhere(expand("<afile>:p"))
+catch
+  " Without SwapExists we don't do anything for ":edit" commands
+endtry
+
+" Function used on the server to make the file visible and possibly execute a
+" command.
+func! EditExisting(fname, command)
+  " Get the window number of the file in the current tab page.
+  let winnr = bufwinnr(a:fname)
+  if winnr <= 0
+    " Not found, look in other tab pages.
+    let bufnr = bufnr(a:fname)
+    for i in range(tabpagenr('$'))
+      if index(tabpagebuflist(i + 1), bufnr) >= 0
+	" Make this tab page the current one and find the window number.
+	exe 'tabnext ' . (i + 1)
+	let winnr = bufwinnr(a:fname)
+	break
+      endif
+    endfor
+  endif
+
+  if winnr > 0
+    exe winnr . "wincmd w"
+  elseif exists('*fnameescape')
+    exe "split " . fnameescape(a:fname)
+  else
+    exe "split " . escape(a:fname, " \t\n*?[{`$\\%#'\"|!<")
+  endif
+
+  if a:command != ''
+    exe "normal! " . a:command
+  endif
+
+  redraw
+endfunc
diff --git a/runtime/pack/dist/opt/justify/plugin/justify.vim b/runtime/pack/dist/opt/justify/plugin/justify.vim
new file mode 100644
index 0000000..4ef3bf9
--- /dev/null
+++ b/runtime/pack/dist/opt/justify/plugin/justify.vim
@@ -0,0 +1,316 @@
+" Function to left and right align text.
+"
+" Written by:	Preben "Peppe" Guldberg <c928400@student.dtu.dk>
+" Created:	980806 14:13 (or around that time anyway)
+" Revised:	001103 00:36 (See "Revisions" below)
+
+
+" function Justify( [ textwidth [, maxspaces [, indent] ] ] )
+"
+" Justify()  will  left  and  right  align  a  line  by  filling  in  an
+" appropriate amount of spaces.  Extra  spaces  are  added  to  existing
+" spaces starting from the right side of the line.  As an  example,  the
+" following documentation has been justified.
+"
+" The function takes the following arguments:
+
+" textwidth argument
+" ------------------
+" If not specified, the value of the 'textwidth'  option  is  used.   If
+" 'textwidth' is zero a value of 80 is used.
+"
+" Additionally the arguments 'tw' and '' are  accepted.   The  value  of
+" 'textwidth' will be used. These are handy, if you just want to specify
+" the maxspaces argument.
+
+" maxspaces argument
+" ------------------
+" If specified, alignment will only be done, if the  longest  space  run
+" after alignment is no longer than maxspaces.
+"
+" An argument of '' is accepted, should the user  like  to  specify  all
+" arguments.
+"
+" To aid user defined commands, negative  values  are  accepted  aswell.
+" Using a negative value specifies the default behaviour: any length  of
+" space runs will be used to justify the text.
+
+" indent argument
+" ---------------
+" This argument specifies how a line should be indented. The default  is
+" to keep the current indentation.
+"
+" Negative  values:  Keep  current   amount   of   leading   whitespace.
+" Positive values: Indent all lines with leading whitespace  using  this
+" amount of whitespace.
+"
+" Note that the value 0, needs to be quoted as  a  string.   This  value
+" leads to a left flushed text.
+"
+" Additionally units of  'shiftwidth'/'sw'  and  'tabstop'/'ts'  may  be
+" added. In this case, if the value of indent is positive, the amount of
+" whitespace to be  added  will  be  multiplied  by  the  value  of  the
+" 'shiftwidth' and 'tabstop' settings.  If these  units  are  used,  the
+"  argument must  be  given  as  a  string,  eg.   Justify('','','2sw').
+"
+" If the values of 'sw' or 'tw' are negative, they  are  treated  as  if
+" they were 0, which means that the text is flushed left.  There  is  no
+" check if a negative number prefix is used to  change  the  sign  of  a
+" negative 'sw' or 'ts' value.
+"
+" As with the other arguments,  ''  may  be  used  to  get  the  default
+" behaviour.
+
+
+" Notes:
+"
+" If the line, adjusted for space runs and leading/trailing  whitespace,
+" is wider than the used textwidth, the line will be left untouched  (no
+" whitespace removed).  This should be equivalent to  the  behaviour  of
+" :left, :right and :center.
+"
+" If the resulting line is shorter than the used textwidth  it  is  left
+" untouched.
+"
+" All space runs in the line  are  truncated  before  the  alignment  is
+" carried out.
+"
+" If you have set 'noexpandtab', :retab!  is used to replace space  runs
+"  with whitespace  using  the  value  of  'tabstop'.   This  should  be
+" conformant with :left, :right and :center.
+"
+" If joinspaces is set, an extra space is added after '.', '?' and  '!'.
+" If 'cpooptions' include 'j', extra space  is  only  added  after  '.'.
+" (This may on occasion conflict with maxspaces.)
+
+
+" Related mappings:
+"
+" Mappings that will align text using the current text width,  using  at
+" most four spaces in a  space  run  and  keeping  current  indentation.
+nmap _j :%call Justify('tw',4)<CR>
+vmap _j :call Justify('tw',4)<CR>
+"
+" Mappings that will remove space runs and format lines (might be useful
+" prior to aligning the text).
+nmap ,gq :%s/\s\+/ /g<CR>gq1G
+vmap ,gq :s/\s\+/ /g<CR>gvgq
+
+
+" User defined command:
+"
+" The following is an ex command that works as a shortcut to the Justify
+" function.  Arguments to Justify() can  be  added  after  the  command.
+com! -range -nargs=* Justify <line1>,<line2>call Justify(<f-args>)
+"
+" The following commands are all equivalent:
+"
+" 1. Simplest use of Justify():
+"       :call Justify()
+"       :Justify
+"
+" 2. The _j mapping above via the ex command:
+"       :%Justify tw 4
+"
+" 3.  Justify  visualised  text  at  72nd  column  while  indenting  all
+" previously indented text two shiftwidths
+"       :'<,'>call Justify(72,'','2sw')
+"       :'<,'>Justify 72 -1 2sw
+"
+" This documentation has been justified  using  the  following  command:
+":se et|kz|1;/^" function Justify(/+,'z-g/^" /s/^" //|call Justify(70,3)|s/^/" /
+
+" Revisions:
+" 001103: If 'joinspaces' was set, calculations could be wrong.
+"	  Tabs at start of line could also lead to errors.
+"	  Use setline() instead of "exec 's/foo/bar/' - safer.
+"	  Cleaned up the code a bit.
+"
+" Todo:	  Convert maps to the new script specific form
+
+" Error function
+function! Justify_error(message)
+    echohl Error
+    echo "Justify([tw, [maxspaces [, indent]]]): " . a:message
+    echohl None
+endfunction
+
+
+" Now for the real thing
+function! Justify(...) range
+
+    if a:0 > 3
+    call Justify_error("Too many arguments (max 3)")
+    return 1
+    endif
+
+    " Set textwidth (accept 'tw' and '' as arguments)
+    if a:0 >= 1
+	if a:1 =~ '^\(tw\)\=$'
+	    let tw = &tw
+	elseif a:1 =~ '^\d\+$'
+	    let tw = a:1
+	else
+	    call Justify_error("tw must be a number (>0), '' or 'tw'")
+	    return 2
+	endif
+    else
+	let tw = &tw
+    endif
+    if tw == 0
+	let tw = 80
+    endif
+
+    " Set maximum number of spaces between WORDs
+    if a:0 >= 2
+	if a:2 == ''
+	    let maxspaces = tw
+	elseif a:2 =~ '^-\d\+$'
+	    let maxspaces = tw
+	elseif a:2 =~ '^\d\+$'
+	    let maxspaces = a:2
+	else
+	    call Justify_error("maxspaces must be a number or ''")
+	    return 3
+	endif
+    else
+	let maxspaces = tw
+    endif
+    if maxspaces <= 1
+	call Justify_error("maxspaces should be larger than 1")
+	return 4
+    endif
+
+    " Set the indentation style (accept sw and ts units)
+    let indent_fix = ''
+    if a:0 >= 3
+	if (a:3 == '') || a:3 =~ '^-[1-9]\d*\(shiftwidth\|sw\|tabstop\|ts\)\=$'
+	    let indent = -1
+	elseif a:3 =~ '^-\=0\(shiftwidth\|sw\|tabstop\|ts\)\=$'
+	    let indent = 0
+	elseif a:3 =~ '^\d\+\(shiftwidth\|sw\|tabstop\|ts\)\=$'
+	    let indent = substitute(a:3, '\D', '', 'g')
+	elseif a:3 =~ '^\(shiftwidth\|sw\|tabstop\|ts\)$'
+	    let indent = 1
+	else
+	    call Justify_error("indent: a number with 'sw'/'ts' unit")
+	    return 5
+	endif
+	if indent >= 0
+	    while indent > 0
+		let indent_fix = indent_fix . ' '
+		let indent = indent - 1
+	    endwhile
+	    let indent_sw = 0
+	    if a:3 =~ '\(shiftwidth\|sw\)'
+		let indent_sw = &sw
+	    elseif a:3 =~ '\(tabstop\|ts\)'
+		let indent_sw = &ts
+	    endif
+	    let indent_fix2 = ''
+	    while indent_sw > 0
+		let indent_fix2 = indent_fix2 . indent_fix
+		let indent_sw = indent_sw - 1
+	    endwhile
+	    let indent_fix = indent_fix2
+	endif
+    else
+	let indent = -1
+    endif
+
+    " Avoid substitution reports
+    let save_report = &report
+    set report=1000000
+
+    " Check 'joinspaces' and 'cpo'
+    if &js == 1
+	if &cpo =~ 'j'
+	    let join_str = '\(\. \)'
+	else
+	    let join_str = '\([.!?!] \)'
+	endif
+    endif
+
+    let cur = a:firstline
+    while cur <= a:lastline
+
+	let str_orig = getline(cur)
+	let save_et = &et
+	set et
+	exec cur . "retab"
+	let &et = save_et
+	let str = getline(cur)
+
+	let indent_str = indent_fix
+	let indent_n = strlen(indent_str)
+	" Shall we remember the current indentation
+	if indent < 0
+	    let indent_orig = matchstr(str_orig, '^\s*')
+	    if strlen(indent_orig) > 0
+		let indent_str = indent_orig
+		let indent_n = strlen(matchstr(str, '^\s*'))
+	    endif
+	endif
+
+	" Trim trailing, leading and running whitespace
+	let str = substitute(str, '\s\+$', '', '')
+	let str = substitute(str, '^\s\+', '', '')
+	let str = substitute(str, '\s\+', ' ', 'g')
+	let str_n = strdisplaywidth(str)
+
+	" Possible addition of space after punctuation
+	if exists("join_str")
+	    let str = substitute(str, join_str, '\1 ', 'g')
+	endif
+	let join_n = strdisplaywidth(str) - str_n
+
+	" Can extraspaces be added?
+	" Note that str_n may be less than strlen(str) [joinspaces above]
+	if strdisplaywidth(str) <= tw - indent_n && str_n > 0
+	    " How many spaces should be added
+	    let s_add = tw - str_n - indent_n - join_n
+	    let s_nr  = strlen(substitute(str, '\S', '', 'g') ) - join_n
+	    let s_dup = s_add / s_nr
+	    let s_mod = s_add % s_nr
+
+	    " Test if the changed line fits with tw
+	    if 0 <= (str_n + (maxspaces - 1)*s_nr + indent_n) - tw
+
+		" Duplicate spaces
+		while s_dup > 0
+		    let str = substitute(str, '\( \+\)', ' \1', 'g')
+		    let s_dup = s_dup - 1
+		endwhile
+
+		" Add extra spaces from the end
+		while s_mod > 0
+		    let str = substitute(str, '\(\(\s\+\S\+\)\{' . s_mod .  '}\)$', ' \1', '')
+		    let s_mod = s_mod - 1
+		endwhile
+
+		" Indent the line
+		if indent_n > 0
+		    let str = substitute(str, '^', indent_str, '' )
+		endif
+
+		" Replace the line
+		call setline(cur, str)
+
+		" Convert to whitespace
+		if &et == 0
+		    exec cur . 'retab!'
+		endif
+
+	    endif   " Change of line
+	endif	" Possible change
+
+	let cur = cur + 1
+    endwhile
+
+    norm ^
+
+    let &report = save_report
+
+endfunction
+
+" EOF	vim: tw=78 ts=8 sw=4 sts=4 noet ai
diff --git a/runtime/pack/dist/opt/matchit/autoload/matchit.vim b/runtime/pack/dist/opt/matchit/autoload/matchit.vim
new file mode 100644
index 0000000..abf06d3
--- /dev/null
+++ b/runtime/pack/dist/opt/matchit/autoload/matchit.vim
@@ -0,0 +1,754 @@
+"  matchit.vim: (global plugin) Extended "%" matching
+"  autload script of matchit plugin, see ../plugin/matchit.vim
+"  Last Change: 2019 Jan 28
+
+let s:last_mps = ""
+let s:last_words = ":"
+let s:patBR = ""
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+" Auto-complete mappings:  (not yet "ready for prime time")
+" TODO Read :help write-plugin for the "right" way to let the user
+" specify a key binding.
+"   let g:match_auto = '<C-]>'
+"   let g:match_autoCR = '<C-CR>'
+" if exists("g:match_auto")
+"   execute "inoremap " . g:match_auto . ' x<Esc>"=<SID>Autocomplete()<CR>Pls'
+" endif
+" if exists("g:match_autoCR")
+"   execute "inoremap " . g:match_autoCR . ' <CR><C-R>=<SID>Autocomplete()<CR>'
+" endif
+" if exists("g:match_gthhoh")
+"   execute "inoremap " . g:match_gthhoh . ' <C-O>:call <SID>Gthhoh()<CR>'
+" endif " gthhoh = "Get the heck out of here!"
+
+let s:notslash = '\\\@1<!\%(\\\\\)*'
+
+function s:RestoreOptions()
+  " In s:CleanUp(), :execute "set" restore_options .
+  let restore_options = ""
+  if get(b:, 'match_ignorecase', &ic) != &ic
+    let restore_options .= (&ic ? " " : " no") . "ignorecase"
+    let &ignorecase = b:match_ignorecase
+  endif
+  if &ve != ''
+    let restore_options = " ve=" . &ve . restore_options
+    set ve=
+  endif
+  return restore_options
+endfunction
+
+function matchit#Match_wrapper(word, forward, mode) range
+  let restore_options = s:RestoreOptions()
+  " If this function was called from Visual mode, make sure that the cursor
+  " is at the correct end of the Visual range:
+  if a:mode == "v"
+    execute "normal! gv\<Esc>"
+  elseif a:mode == "o" && mode(1) !~# '[vV]'
+    exe "norm! v"
+  endif
+  " In s:CleanUp(), we may need to check whether the cursor moved forward.
+  let startpos = [line("."), col(".")]
+  " Use default behavior if called with a count.
+  if v:count
+    exe "normal! " . v:count . "%"
+    return s:CleanUp(restore_options, a:mode, startpos)
+  end
+
+  " First step:  if not already done, set the script variables
+  "   s:do_BR   flag for whether there are backrefs
+  "   s:pat     parsed version of b:match_words
+  "   s:all     regexp based on s:pat and the default groups
+  if !exists("b:match_words") || b:match_words == ""
+    let match_words = ""
+  elseif b:match_words =~ ":"
+    let match_words = b:match_words
+  else
+    " Allow b:match_words = "GetVimMatchWords()" .
+    execute "let match_words =" b:match_words
+  endif
+" Thanks to Preben "Peppe" Guldberg and Bram Moolenaar for this suggestion!
+  if (match_words != s:last_words) || (&mps != s:last_mps)
+      \ || exists("b:match_debug")
+    let s:last_mps = &mps
+    " quote the special chars in 'matchpairs', replace [,:] with \| and then
+    " append the builtin pairs (/*, */, #if, #ifdef, #ifndef, #else, #elif,
+    " #endif)
+    let default = escape(&mps, '[$^.*~\\/?]') . (strlen(&mps) ? "," : "") .
+      \ '\/\*:\*\/,#\s*if\%(n\=def\)\=:#\s*else\>:#\s*elif\>:#\s*endif\>'
+    " s:all = pattern with all the keywords
+    let match_words = match_words . (strlen(match_words) ? "," : "") . default
+    let s:last_words = match_words
+    if match_words !~ s:notslash . '\\\d'
+      let s:do_BR = 0
+      let s:pat = match_words
+    else
+      let s:do_BR = 1
+      let s:pat = s:ParseWords(match_words)
+    endif
+    let s:all = substitute(s:pat, s:notslash . '\zs[,:]\+', '\\|', 'g')
+    " Just in case there are too many '\(...)' groups inside the pattern, make
+    " sure to use \%(...) groups, so that error E872 can be avoided
+    let s:all = substitute(s:all, '\\(', '\\%(', 'g')
+    let s:all = '\%(' . s:all . '\)'
+    if exists("b:match_debug")
+      let b:match_pat = s:pat
+    endif
+    " Reconstruct the version with unresolved backrefs.
+    let s:patBR = substitute(match_words.',',
+      \ s:notslash.'\zs[,:]*,[,:]*', ',', 'g')
+    let s:patBR = substitute(s:patBR, s:notslash.'\zs:\{2,}', ':', 'g')
+  endif
+
+  " Second step:  set the following local variables:
+  "     matchline = line on which the cursor started
+  "     curcol    = number of characters before match
+  "     prefix    = regexp for start of line to start of match
+  "     suffix    = regexp for end of match to end of line
+  " Require match to end on or after the cursor and prefer it to
+  " start on or before the cursor.
+  let matchline = getline(startpos[0])
+  if a:word != ''
+    " word given
+    if a:word !~ s:all
+      echohl WarningMsg|echo 'Missing rule for word:"'.a:word.'"'|echohl NONE
+      return s:CleanUp(restore_options, a:mode, startpos)
+    endif
+    let matchline = a:word
+    let curcol = 0
+    let prefix = '^\%('
+    let suffix = '\)$'
+  " Now the case when "word" is not given
+  else  " Find the match that ends on or after the cursor and set curcol.
+    let regexp = s:Wholematch(matchline, s:all, startpos[1]-1)
+    let curcol = match(matchline, regexp)
+    " If there is no match, give up.
+    if curcol == -1
+      return s:CleanUp(restore_options, a:mode, startpos)
+    endif
+    let endcol = matchend(matchline, regexp)
+    let suf = strlen(matchline) - endcol
+    let prefix = (curcol ? '^.*\%'  . (curcol + 1) . 'c\%(' : '^\%(')
+    let suffix = (suf ? '\)\%' . (endcol + 1) . 'c.*$'  : '\)$')
+  endif
+  if exists("b:match_debug")
+    let b:match_match = matchstr(matchline, regexp)
+    let b:match_col = curcol+1
+  endif
+
+  " Third step:  Find the group and single word that match, and the original
+  " (backref) versions of these.  Then, resolve the backrefs.
+  " Set the following local variable:
+  " group = colon-separated list of patterns, one of which matches
+  "       = ini:mid:fin or ini:fin
+  "
+  " Now, set group and groupBR to the matching group: 'if:endif' or
+  " 'while:endwhile' or whatever.  A bit of a kluge:  s:Choose() returns
+  " group . "," . groupBR, and we pick it apart.
+  let group = s:Choose(s:pat, matchline, ",", ":", prefix, suffix, s:patBR)
+  let i = matchend(group, s:notslash . ",")
+  let groupBR = strpart(group, i)
+  let group = strpart(group, 0, i-1)
+  " Now, matchline =~ prefix . substitute(group,':','\|','g') . suffix
+  if s:do_BR " Do the hard part:  resolve those backrefs!
+    let group = s:InsertRefs(groupBR, prefix, group, suffix, matchline)
+  endif
+  if exists("b:match_debug")
+    let b:match_wholeBR = groupBR
+    let i = matchend(groupBR, s:notslash . ":")
+    let b:match_iniBR = strpart(groupBR, 0, i-1)
+  endif
+
+  " Fourth step:  Set the arguments for searchpair().
+  let i = matchend(group, s:notslash . ":")
+  let j = matchend(group, '.*' . s:notslash . ":")
+  let ini = strpart(group, 0, i-1)
+  let mid = substitute(strpart(group, i,j-i-1), s:notslash.'\zs:', '\\|', 'g')
+  let fin = strpart(group, j)
+  "Un-escape the remaining , and : characters.
+  let ini = substitute(ini, s:notslash . '\zs\\\(:\|,\)', '\1', 'g')
+  let mid = substitute(mid, s:notslash . '\zs\\\(:\|,\)', '\1', 'g')
+  let fin = substitute(fin, s:notslash . '\zs\\\(:\|,\)', '\1', 'g')
+  " searchpair() requires that these patterns avoid \(\) groups.
+  let ini = substitute(ini, s:notslash . '\zs\\(', '\\%(', 'g')
+  let mid = substitute(mid, s:notslash . '\zs\\(', '\\%(', 'g')
+  let fin = substitute(fin, s:notslash . '\zs\\(', '\\%(', 'g')
+  " Set mid.  This is optimized for readability, not micro-efficiency!
+  if a:forward && matchline =~ prefix . fin . suffix
+    \ || !a:forward && matchline =~ prefix . ini . suffix
+    let mid = ""
+  endif
+  " Set flag.  This is optimized for readability, not micro-efficiency!
+  if a:forward && matchline =~ prefix . fin . suffix
+    \ || !a:forward && matchline !~ prefix . ini . suffix
+    let flag = "bW"
+  else
+    let flag = "W"
+  endif
+  " Set skip.
+  if exists("b:match_skip")
+    let skip = b:match_skip
+  elseif exists("b:match_comment") " backwards compatibility and testing!
+    let skip = "r:" . b:match_comment
+  else
+    let skip = 's:comment\|string'
+  endif
+  let skip = s:ParseSkip(skip)
+  if exists("b:match_debug")
+    let b:match_ini = ini
+    let b:match_tail = (strlen(mid) ? mid.'\|' : '') . fin
+  endif
+
+  " Fifth step:  actually start moving the cursor and call searchpair().
+  " Later, :execute restore_cursor to get to the original screen.
+  let view = winsaveview()
+  call cursor(0, curcol + 1)
+  if skip =~ 'synID' && !(has("syntax") && exists("g:syntax_on"))
+    let skip = "0"
+  else
+    execute "if " . skip . "| let skip = '0' | endif"
+  endif
+  let sp_return = searchpair(ini, mid, fin, flag, skip)
+  let final_position = "call cursor(" . line(".") . "," . col(".") . ")"
+  " Restore cursor position and original screen.
+  call winrestview(view)
+  normal! m'
+  if sp_return > 0
+    execute final_position
+  endif
+  return s:CleanUp(restore_options, a:mode, startpos, mid.'\|'.fin)
+endfun
+
+" Restore options and do some special handling for Operator-pending mode.
+" The optional argument is the tail of the matching group.
+fun! s:CleanUp(options, mode, startpos, ...)
+  if strlen(a:options)
+    execute "set" a:options
+  endif
+  " Open folds, if appropriate.
+  if a:mode != "o"
+    if &foldopen =~ "percent"
+      normal! zv
+    endif
+    " In Operator-pending mode, we want to include the whole match
+    " (for example, d%).
+    " This is only a problem if we end up moving in the forward direction.
+  elseif (a:startpos[0] < line(".")) ||
+        \ (a:startpos[0] == line(".") && a:startpos[1] < col("."))
+    if a:0
+      " Check whether the match is a single character.  If not, move to the
+      " end of the match.
+      let matchline = getline(".")
+      let currcol = col(".")
+      let regexp = s:Wholematch(matchline, a:1, currcol-1)
+      let endcol = matchend(matchline, regexp)
+      if endcol > currcol  " This is NOT off by one!
+        call cursor(0, endcol)
+      endif
+    endif " a:0
+  endif " a:mode != "o" && etc.
+  return 0
+endfun
+
+" Example (simplified HTML patterns):  if
+"   a:groupBR   = '<\(\k\+\)>:</\1>'
+"   a:prefix    = '^.\{3}\('
+"   a:group     = '<\(\k\+\)>:</\(\k\+\)>'
+"   a:suffix    = '\).\{2}$'
+"   a:matchline =  "123<tag>12" or "123</tag>12"
+" then extract "tag" from a:matchline and return "<tag>:</tag>" .
+fun! s:InsertRefs(groupBR, prefix, group, suffix, matchline)
+  if a:matchline !~ a:prefix .
+    \ substitute(a:group, s:notslash . '\zs:', '\\|', 'g') . a:suffix
+    return a:group
+  endif
+  let i = matchend(a:groupBR, s:notslash . ':')
+  let ini = strpart(a:groupBR, 0, i-1)
+  let tailBR = strpart(a:groupBR, i)
+  let word = s:Choose(a:group, a:matchline, ":", "", a:prefix, a:suffix,
+    \ a:groupBR)
+  let i = matchend(word, s:notslash . ":")
+  let wordBR = strpart(word, i)
+  let word = strpart(word, 0, i-1)
+  " Now, a:matchline =~ a:prefix . word . a:suffix
+  if wordBR != ini
+    let table = s:Resolve(ini, wordBR, "table")
+  else
+    let table = ""
+    let d = 0
+    while d < 10
+      if tailBR =~ s:notslash . '\\' . d
+        let table = table . d
+      else
+        let table = table . "-"
+      endif
+      let d = d + 1
+    endwhile
+  endif
+  let d = 9
+  while d
+    if table[d] != "-"
+      let backref = substitute(a:matchline, a:prefix.word.a:suffix,
+        \ '\'.table[d], "")
+        " Are there any other characters that should be escaped?
+      let backref = escape(backref, '*,:')
+      execute s:Ref(ini, d, "start", "len")
+      let ini = strpart(ini, 0, start) . backref . strpart(ini, start+len)
+      let tailBR = substitute(tailBR, s:notslash . '\zs\\' . d,
+        \ escape(backref, '\\&'), 'g')
+    endif
+    let d = d-1
+  endwhile
+  if exists("b:match_debug")
+    if s:do_BR
+      let b:match_table = table
+      let b:match_word = word
+    else
+      let b:match_table = ""
+      let b:match_word = ""
+    endif
+  endif
+  return ini . ":" . tailBR
+endfun
+
+" Input a comma-separated list of groups with backrefs, such as
+"   a:groups = '\(foo\):end\1,\(bar\):end\1'
+" and return a comma-separated list of groups with backrefs replaced:
+"   return '\(foo\):end\(foo\),\(bar\):end\(bar\)'
+fun! s:ParseWords(groups)
+  let groups = substitute(a:groups.",", s:notslash.'\zs[,:]*,[,:]*', ',', 'g')
+  let groups = substitute(groups, s:notslash . '\zs:\{2,}', ':', 'g')
+  let parsed = ""
+  while groups =~ '[^,:]'
+    let i = matchend(groups, s:notslash . ':')
+    let j = matchend(groups, s:notslash . ',')
+    let ini = strpart(groups, 0, i-1)
+    let tail = strpart(groups, i, j-i-1) . ":"
+    let groups = strpart(groups, j)
+    let parsed = parsed . ini
+    let i = matchend(tail, s:notslash . ':')
+    while i != -1
+      " In 'if:else:endif', ini='if' and word='else' and then word='endif'.
+      let word = strpart(tail, 0, i-1)
+      let tail = strpart(tail, i)
+      let i = matchend(tail, s:notslash . ':')
+      let parsed = parsed . ":" . s:Resolve(ini, word, "word")
+    endwhile " Now, tail has been used up.
+    let parsed = parsed . ","
+  endwhile " groups =~ '[^,:]'
+  let parsed = substitute(parsed, ',$', '', '')
+  return parsed
+endfun
+
+" TODO I think this can be simplified and/or made more efficient.
+" TODO What should I do if a:start is out of range?
+" Return a regexp that matches all of a:string, such that
+" matchstr(a:string, regexp) represents the match for a:pat that starts
+" as close to a:start as possible, before being preferred to after, and
+" ends after a:start .
+" Usage:
+" let regexp = s:Wholematch(getline("."), 'foo\|bar', col(".")-1)
+" let i      = match(getline("."), regexp)
+" let j      = matchend(getline("."), regexp)
+" let match  = matchstr(getline("."), regexp)
+fun! s:Wholematch(string, pat, start)
+  let group = '\%(' . a:pat . '\)'
+  let prefix = (a:start ? '\(^.*\%<' . (a:start + 2) . 'c\)\zs' : '^')
+  let len = strlen(a:string)
+  let suffix = (a:start+1 < len ? '\(\%>'.(a:start+1).'c.*$\)\@=' : '$')
+  if a:string !~ prefix . group . suffix
+    let prefix = ''
+  endif
+  return prefix . group . suffix
+endfun
+
+" No extra arguments:  s:Ref(string, d) will
+" find the d'th occurrence of '\(' and return it, along with everything up
+" to and including the matching '\)'.
+" One argument:  s:Ref(string, d, "start") returns the index of the start
+" of the d'th '\(' and any other argument returns the length of the group.
+" Two arguments:  s:Ref(string, d, "foo", "bar") returns a string to be
+" executed, having the effect of
+"   :let foo = s:Ref(string, d, "start")
+"   :let bar = s:Ref(string, d, "len")
+fun! s:Ref(string, d, ...)
+  let len = strlen(a:string)
+  if a:d == 0
+    let start = 0
+  else
+    let cnt = a:d
+    let match = a:string
+    while cnt
+      let cnt = cnt - 1
+      let index = matchend(match, s:notslash . '\\(')
+      if index == -1
+        return ""
+      endif
+      let match = strpart(match, index)
+    endwhile
+    let start = len - strlen(match)
+    if a:0 == 1 && a:1 == "start"
+      return start - 2
+    endif
+    let cnt = 1
+    while cnt
+      let index = matchend(match, s:notslash . '\\(\|\\)') - 1
+      if index == -2
+        return ""
+      endif
+      " Increment if an open, decrement if a ')':
+      let cnt = cnt + (match[index]=="(" ? 1 : -1)  " ')'
+      let match = strpart(match, index+1)
+    endwhile
+    let start = start - 2
+    let len = len - start - strlen(match)
+  endif
+  if a:0 == 1
+    return len
+  elseif a:0 == 2
+    return "let " . a:1 . "=" . start . "| let " . a:2 . "=" . len
+  else
+    return strpart(a:string, start, len)
+  endif
+endfun
+
+" Count the number of disjoint copies of pattern in string.
+" If the pattern is a literal string and contains no '0' or '1' characters
+" then s:Count(string, pattern, '0', '1') should be faster than
+" s:Count(string, pattern).
+fun! s:Count(string, pattern, ...)
+  let pat = escape(a:pattern, '\\')
+  if a:0 > 1
+    let foo = substitute(a:string, '[^'.a:pattern.']', "a:1", "g")
+    let foo = substitute(a:string, pat, a:2, "g")
+    let foo = substitute(foo, '[^' . a:2 . ']', "", "g")
+    return strlen(foo)
+  endif
+  let result = 0
+  let foo = a:string
+  let index = matchend(foo, pat)
+  while index != -1
+    let result = result + 1
+    let foo = strpart(foo, index)
+    let index = matchend(foo, pat)
+  endwhile
+  return result
+endfun
+
+" s:Resolve('\(a\)\(b\)', '\(c\)\2\1\1\2') should return table.word, where
+" word = '\(c\)\(b\)\(a\)\3\2' and table = '-32-------'.  That is, the first
+" '\1' in target is replaced by '\(a\)' in word, table[1] = 3, and this
+" indicates that all other instances of '\1' in target are to be replaced
+" by '\3'.  The hard part is dealing with nesting...
+" Note that ":" is an illegal character for source and target,
+" unless it is preceded by "\".
+fun! s:Resolve(source, target, output)
+  let word = a:target
+  let i = matchend(word, s:notslash . '\\\d') - 1
+  let table = "----------"
+  while i != -2 " There are back references to be replaced.
+    let d = word[i]
+    let backref = s:Ref(a:source, d)
+    " The idea is to replace '\d' with backref.  Before we do this,
+    " replace any \(\) groups in backref with :1, :2, ... if they
+    " correspond to the first, second, ... group already inserted
+    " into backref.  Later, replace :1 with \1 and so on.  The group
+    " number w+b within backref corresponds to the group number
+    " s within a:source.
+    " w = number of '\(' in word before the current one
+    let w = s:Count(
+    \ substitute(strpart(word, 0, i-1), '\\\\', '', 'g'), '\(', '1')
+    let b = 1 " number of the current '\(' in backref
+    let s = d " number of the current '\(' in a:source
+    while b <= s:Count(substitute(backref, '\\\\', '', 'g'), '\(', '1')
+    \ && s < 10
+      if table[s] == "-"
+        if w + b < 10
+          " let table[s] = w + b
+          let table = strpart(table, 0, s) . (w+b) . strpart(table, s+1)
+        endif
+        let b = b + 1
+        let s = s + 1
+      else
+        execute s:Ref(backref, b, "start", "len")
+        let ref = strpart(backref, start, len)
+        let backref = strpart(backref, 0, start) . ":". table[s]
+        \ . strpart(backref, start+len)
+        let s = s + s:Count(substitute(ref, '\\\\', '', 'g'), '\(', '1')
+      endif
+    endwhile
+    let word = strpart(word, 0, i-1) . backref . strpart(word, i+1)
+    let i = matchend(word, s:notslash . '\\\d') - 1
+  endwhile
+  let word = substitute(word, s:notslash . '\zs:', '\\', 'g')
+  if a:output == "table"
+    return table
+  elseif a:output == "word"
+    return word
+  else
+    return table . word
+  endif
+endfun
+
+" Assume a:comma = ",".  Then the format for a:patterns and a:1 is
+"   a:patterns = "<pat1>,<pat2>,..."
+"   a:1 = "<alt1>,<alt2>,..."
+" If <patn> is the first pattern that matches a:string then return <patn>
+" if no optional arguments are given; return <patn>,<altn> if a:1 is given.
+fun! s:Choose(patterns, string, comma, branch, prefix, suffix, ...)
+  let tail = (a:patterns =~ a:comma."$" ? a:patterns : a:patterns . a:comma)
+  let i = matchend(tail, s:notslash . a:comma)
+  if a:0
+    let alttail = (a:1 =~ a:comma."$" ? a:1 : a:1 . a:comma)
+    let j = matchend(alttail, s:notslash . a:comma)
+  endif
+  let current = strpart(tail, 0, i-1)
+  if a:branch == ""
+    let currpat = current
+  else
+    let currpat = substitute(current, s:notslash . a:branch, '\\|', 'g')
+  endif
+  while a:string !~ a:prefix . currpat . a:suffix
+    let tail = strpart(tail, i)
+    let i = matchend(tail, s:notslash . a:comma)
+    if i == -1
+      return -1
+    endif
+    let current = strpart(tail, 0, i-1)
+    if a:branch == ""
+      let currpat = current
+    else
+      let currpat = substitute(current, s:notslash . a:branch, '\\|', 'g')
+    endif
+    if a:0
+      let alttail = strpart(alttail, j)
+      let j = matchend(alttail, s:notslash . a:comma)
+    endif
+  endwhile
+  if a:0
+    let current = current . a:comma . strpart(alttail, 0, j-1)
+  endif
+  return current
+endfun
+
+fun! matchit#Match_debug()
+  let b:match_debug = 1 " Save debugging information.
+  " pat = all of b:match_words with backrefs parsed
+  amenu &Matchit.&pat   :echo b:match_pat<CR>
+  " match = bit of text that is recognized as a match
+  amenu &Matchit.&match :echo b:match_match<CR>
+  " curcol = cursor column of the start of the matching text
+  amenu &Matchit.&curcol        :echo b:match_col<CR>
+  " wholeBR = matching group, original version
+  amenu &Matchit.wh&oleBR       :echo b:match_wholeBR<CR>
+  " iniBR = 'if' piece, original version
+  amenu &Matchit.ini&BR :echo b:match_iniBR<CR>
+  " ini = 'if' piece, with all backrefs resolved from match
+  amenu &Matchit.&ini   :echo b:match_ini<CR>
+  " tail = 'else\|endif' piece, with all backrefs resolved from match
+  amenu &Matchit.&tail  :echo b:match_tail<CR>
+  " fin = 'endif' piece, with all backrefs resolved from match
+  amenu &Matchit.&word  :echo b:match_word<CR>
+  " '\'.d in ini refers to the same thing as '\'.table[d] in word.
+  amenu &Matchit.t&able :echo '0:' . b:match_table . ':9'<CR>
+endfun
+
+" Jump to the nearest unmatched "(" or "if" or "<tag>" if a:spflag == "bW"
+" or the nearest unmatched "</tag>" or "endif" or ")" if a:spflag == "W".
+" Return a "mark" for the original position, so that
+"   let m = MultiMatch("bW", "n") ... call winrestview(m)
+" will return to the original position.  If there is a problem, do not
+" move the cursor and return {}, unless a count is given, in which case
+" go up or down as many levels as possible and again return {}.
+" TODO This relies on the same patterns as % matching.  It might be a good
+" idea to give it its own matching patterns.
+fun! matchit#MultiMatch(spflag, mode)
+  let restore_options = s:RestoreOptions()
+  let startpos = [line("."), col(".")]
+  " save v:count1 variable, might be reset from the restore_cursor command
+  let level = v:count1
+  if a:mode == "o" && mode(1) !~# '[vV]'
+    exe "norm! v"
+  endif
+
+  " First step:  if not already done, set the script variables
+  "   s:do_BR   flag for whether there are backrefs
+  "   s:pat     parsed version of b:match_words
+  "   s:all     regexp based on s:pat and the default groups
+  " This part is copied and slightly modified from matchit#Match_wrapper().
+  if !exists("b:match_words") || b:match_words == ""
+    let match_words = ""
+    " Allow b:match_words = "GetVimMatchWords()" .
+  elseif b:match_words =~ ":"
+    let match_words = b:match_words
+  else
+    execute "let match_words =" b:match_words
+  endif
+  if (match_words != s:last_words) || (&mps != s:last_mps) ||
+    \ exists("b:match_debug")
+    let default = escape(&mps, '[$^.*~\\/?]') . (strlen(&mps) ? "," : "") .
+      \ '\/\*:\*\/,#\s*if\%(n\=def\)\=:#\s*else\>:#\s*elif\>:#\s*endif\>'
+    let s:last_mps = &mps
+    let match_words = match_words . (strlen(match_words) ? "," : "") . default
+    let s:last_words = match_words
+    if match_words !~ s:notslash . '\\\d'
+      let s:do_BR = 0
+      let s:pat = match_words
+    else
+      let s:do_BR = 1
+      let s:pat = s:ParseWords(match_words)
+    endif
+    let s:all = '\%(' . substitute(s:pat, '[,:]\+', '\\|', 'g') . '\)'
+    if exists("b:match_debug")
+      let b:match_pat = s:pat
+    endif
+    " Reconstruct the version with unresolved backrefs.
+    let s:patBR = substitute(match_words.',',
+      \ s:notslash.'\zs[,:]*,[,:]*', ',', 'g')
+    let s:patBR = substitute(s:patBR, s:notslash.'\zs:\{2,}', ':', 'g')
+  endif
+
+  " Second step:  figure out the patterns for searchpair()
+  " and save the screen, cursor position, and 'ignorecase'.
+  " - TODO:  A lot of this is copied from matchit#Match_wrapper().
+  " - maybe even more functionality should be split off
+  " - into separate functions!
+  let openlist = split(s:pat . ',', s:notslash . '\zs:.\{-}' . s:notslash . ',')
+  let midclolist = split(',' . s:pat, s:notslash . '\zs,.\{-}' . s:notslash . ':')
+  call map(midclolist, {-> split(v:val, s:notslash . ':')})
+  let closelist = []
+  let middlelist = []
+  call map(midclolist, {i,v -> [extend(closelist, v[-1 : -1]),
+        \ extend(middlelist, v[0 : -2])]})
+  call map(openlist,   {i,v -> v =~# s:notslash . '\\|' ? '\%(' . v . '\)' : v})
+  call map(middlelist, {i,v -> v =~# s:notslash . '\\|' ? '\%(' . v . '\)' : v})
+  call map(closelist,  {i,v -> v =~# s:notslash . '\\|' ? '\%(' . v . '\)' : v})
+  let open   = join(openlist, ',')
+  let middle = join(middlelist, ',')
+  let close  = join(closelist, ',')
+  if exists("b:match_skip")
+    let skip = b:match_skip
+  elseif exists("b:match_comment") " backwards compatibility and testing!
+    let skip = "r:" . b:match_comment
+  else
+    let skip = 's:comment\|string'
+  endif
+  let skip = s:ParseSkip(skip)
+  let view = winsaveview()
+
+  " Third step: call searchpair().
+  " Replace '\('--but not '\\('--with '\%(' and ',' with '\|'.
+  let openpat = substitute(open, '\%(' . s:notslash . '\)\@<=\\(', '\\%(', 'g')
+  let openpat = substitute(openpat, ',', '\\|', 'g')
+  let closepat = substitute(close, '\%(' . s:notslash . '\)\@<=\\(', '\\%(', 'g')
+  let closepat = substitute(closepat, ',', '\\|', 'g')
+  let middlepat = substitute(middle, '\%(' . s:notslash . '\)\@<=\\(', '\\%(', 'g')
+  let middlepat = substitute(middlepat, ',', '\\|', 'g')
+
+  if skip =~ 'synID' && !(has("syntax") && exists("g:syntax_on"))
+    let skip = '0'
+  else
+    try
+      execute "if " . skip . "| let skip = '0' | endif"
+    catch /^Vim\%((\a\+)\)\=:E363/
+      " We won't find anything, so skip searching, should keep Vim responsive.
+      return {}
+    endtry
+  endif
+  mark '
+  while level
+    if searchpair(openpat, middlepat, closepat, a:spflag, skip) < 1
+      call s:CleanUp(restore_options, a:mode, startpos)
+      return {}
+    endif
+    let level = level - 1
+  endwhile
+
+  " Restore options and return a string to restore the original position.
+  call s:CleanUp(restore_options, a:mode, startpos)
+  return view
+endfun
+
+" Search backwards for "if" or "while" or "<tag>" or ...
+" and return "endif" or "endwhile" or "</tag>" or ... .
+" For now, this uses b:match_words and the same script variables
+" as matchit#Match_wrapper() .  Later, it may get its own patterns,
+" either from a buffer variable or passed as arguments.
+" fun! s:Autocomplete()
+"   echo "autocomplete not yet implemented :-("
+"   if !exists("b:match_words") || b:match_words == ""
+"     return ""
+"   end
+"   let startpos = matchit#MultiMatch("bW")
+"
+"   if startpos == ""
+"     return ""
+"   endif
+"   " - TODO:  figure out whether 'if' or '<tag>' matched, and construct
+"   " - the appropriate closing.
+"   let matchline = getline(".")
+"   let curcol = col(".") - 1
+"   " - TODO:  Change the s:all argument if there is a new set of match pats.
+"   let regexp = s:Wholematch(matchline, s:all, curcol)
+"   let suf = strlen(matchline) - matchend(matchline, regexp)
+"   let prefix = (curcol ? '^.\{'  . curcol . '}\%(' : '^\%(')
+"   let suffix = (suf ? '\).\{' . suf . '}$'  : '\)$')
+"   " Reconstruct the version with unresolved backrefs.
+"   let patBR = substitute(b:match_words.',', '[,:]*,[,:]*', ',', 'g')
+"   let patBR = substitute(patBR, ':\{2,}', ':', "g")
+"   " Now, set group and groupBR to the matching group: 'if:endif' or
+"   " 'while:endwhile' or whatever.
+"   let group = s:Choose(s:pat, matchline, ",", ":", prefix, suffix, patBR)
+"   let i = matchend(group, s:notslash . ",")
+"   let groupBR = strpart(group, i)
+"   let group = strpart(group, 0, i-1)
+"   " Now, matchline =~ prefix . substitute(group,':','\|','g') . suffix
+"   if s:do_BR
+"     let group = s:InsertRefs(groupBR, prefix, group, suffix, matchline)
+"   endif
+" " let g:group = group
+"
+"   " - TODO:  Construct the closing from group.
+"   let fake = "end" . expand("<cword>")
+"   execute startpos
+"   return fake
+" endfun
+
+" Close all open structures.  "Get the heck out of here!"
+" fun! s:Gthhoh()
+"   let close = s:Autocomplete()
+"   while strlen(close)
+"     put=close
+"     let close = s:Autocomplete()
+"   endwhile
+" endfun
+
+" Parse special strings as typical skip arguments for searchpair():
+"   s:foo becomes (current syntax item) =~ foo
+"   S:foo becomes (current syntax item) !~ foo
+"   r:foo becomes (line before cursor) =~ foo
+"   R:foo becomes (line before cursor) !~ foo
+fun! s:ParseSkip(str)
+  let skip = a:str
+  if skip[1] == ":"
+    if skip[0] == "s"
+      let skip = "synIDattr(synID(line('.'),col('.'),1),'name') =~? '" .
+        \ strpart(skip,2) . "'"
+    elseif skip[0] == "S"
+      let skip = "synIDattr(synID(line('.'),col('.'),1),'name') !~? '" .
+        \ strpart(skip,2) . "'"
+    elseif skip[0] == "r"
+      let skip = "strpart(getline('.'),0,col('.'))=~'" . strpart(skip,2). "'"
+    elseif skip[0] == "R"
+      let skip = "strpart(getline('.'),0,col('.'))!~'" . strpart(skip,2). "'"
+    endif
+  endif
+  return skip
+endfun
+
+let &cpo = s:save_cpo
+unlet s:save_cpo
+
+" vim:sts=2:sw=2:et:
diff --git a/runtime/pack/dist/opt/matchit/doc/matchit.txt b/runtime/pack/dist/opt/matchit/doc/matchit.txt
new file mode 100644
index 0000000..d3f7cea
--- /dev/null
+++ b/runtime/pack/dist/opt/matchit/doc/matchit.txt
@@ -0,0 +1,391 @@
+*matchit.txt*   Extended "%" matching
+
+For instructions on installing this file, type
+	`:help matchit-install`
+inside Vim.
+
+For Vim version 8.1.  Last change:  2019 Jan 28
+
+
+		  VIM REFERENCE MANUAL    by Benji Fisher et al
+
+*matchit* *matchit.vim*
+
+1. Extended matching with "%"				|matchit-intro|
+2. Activation						|matchit-activate|
+3. Configuration					|matchit-configure|
+4. Supporting a New Language				|matchit-newlang|
+5. Known Bugs and Limitations				|matchit-bugs|
+
+The functionality mentioned here is a plugin, see |add-plugin|.
+This plugin is only available if 'compatible' is not set.
+
+{Vi does not have any of this}
+
+==============================================================================
+1. Extended matching with "%"				*matchit-intro*
+
+							*matchit-%*
+%	Cycle forward through matching groups, such as "if", "else", "endif",
+	as specified by |b:match_words|.
+
+							*g%* *v_g%* *o_g%*
+g%	Cycle backwards through matching groups, as specified by
+	|b:match_words|.  For example, go from "if" to "endif" to "else".
+
+							*[%* *v_[%* *o_[%*
+[%	Go to [count] previous unmatched group, as specified by
+	|b:match_words|.  Similar to |[{|.
+
+							*]%* *v_]%* *o_]%*
+]%	Go to [count] next unmatched group, as specified by
+	|b:match_words|.  Similar to |]}|.
+
+							*v_a%*
+a%	In Visual mode, select the matching group, as specified by
+	|b:match_words|, containing the cursor.  Similar to |v_a[|.
+	A [count] is ignored, and only the first character of the closing
+	pattern is selected.
+
+In Vim, as in plain vi, the percent key, |%|, jumps the cursor from a brace,
+bracket, or paren to its match.  This can be configured with the 'matchpairs'
+option.  The matchit plugin extends this in several ways:
+
+	    You can match whole words, such as "if" and "endif", not just
+	single characters.  You can also specify a |regular-expression|.
+	    You can define groups with more than two words, such as "if",
+	"else", "endif".  Banging on the "%" key will cycle from the "if" to
+	the first "else", the next "else", ..., the closing "endif", and back
+	to the opening "if".  Nested structures are skipped.  Using |g%| goes
+	in the reverse direction.
+	    By default, words inside comments and strings are ignored, unless
+	the cursor is inside a comment or string when you type "%".  If the
+	only thing you want to do is modify the behavior of "%" so that it
+	behaves this way, you do not have to define |b:match_words|, since the
+	script uses the 'matchpairs' option as well as this variable.
+
+See |matchit-details| for details on what the script does, and |b:match_words|
+for how to specify matching patterns.
+
+MODES:			*matchit-modes* *matchit-v_%* *matchit-o_%*
+
+Mostly, % and related motions (|g%| and |[%| and |]%|) should just work like built-in
+|motion| commands in |Operator-pending| and |Visual| modes (as of 8.1.648)
+
+LANGUAGES:					*matchit-languages*
+
+Currently, the following languages are supported:  Ada, ASP with VBS, Csh,
+DTD, Entity, Essbase, Fortran, HTML, JSP (same as HTML), LaTeX, Lua, Pascal,
+SGML, Shell, Tcsh, Vim, XML.  Other languages may already have support via
+the default |filetype-plugin|s in the standard vim distribution.
+
+To support a new language, see |matchit-newlang| below.
+
+DETAILS:				*matchit-details* *matchit-parse*
+
+Here is an outline of what matchit.vim does each time you hit the "%" key.  If
+there are |backref|s in |b:match_words| then the first step is to produce a
+version in which these back references have been eliminated; if there are no
+|backref|s then this step is skipped.  This step is called parsing.  For
+example, "\(foo\|bar\):end\1" is parsed to yield
+"\(foo\|bar\):end\(foo\|bar\)".  This can get tricky, especially if there are
+nested groups.  If debugging is turned on, the parsed version is saved as
+|b:match_pat|.
+
+							*matchit-choose*
+Next, the script looks for a word on the current line that matches the pattern
+just constructed.  It includes the patterns from the 'matchpairs' option.
+The goal is to do what you expect, which turns out to be a little complicated.
+The script follows these rules:
+
+	Insist on a match that ends on or after the cursor.
+	Prefer a match that includes the cursor position (that is, one that
+		starts on or before the cursor).
+	Prefer a match that starts as close to the cursor as possible.
+	If more than one pattern in |b:match_words| matches, choose the one
+		that is listed first.
+
+Examples:
+
+	Suppose you >
+		:let b:match_words = '<:>,<tag>:</tag>'
+<	and hit "%" with the cursor on or before the "<" in "a <tag> is born".
+	The pattern '<' comes first, so it is preferred over '<tag>', which
+	also matches.  If the cursor is on the "t", however, then '<tag>' is
+	preferred, because this matches a bit of text containing the cursor.
+	If the two groups of patterns were reversed then '<' would never be
+	preferred.
+
+	Suppose you >
+		:let b:match_words = 'if:end if'
+<	(Note the space!) and hit "%" with the cursor at the end of "end if".
+	Then "if" matches, which is probably not what you want, but if the
+	cursor starts on the "end " then "end if" is chosen.  (You can avoid
+	this problem by using a more complicated pattern.)
+
+If there is no match, the cursor does not move.  (Before version 1.13 of the
+script, it would fall back on the usual behavior of |%|).  If debugging is
+turned on, the matched bit of text is saved as |b:match_match| and the cursor
+column of the start of the match is saved as |b:match_col|.
+
+Next, the script looks through |b:match_words| (original and parsed versions)
+for the group and pattern that match.  If debugging is turned on, the group is
+saved as |b:match_ini| (the first pattern) and |b:match_tail| (the rest).  If
+there are |backref|s then, in addition, the matching pattern is saved as
+|b:match_word| and a table of translations is saved as |b:match_table|.  If
+there are |backref|s, these are determined from the matching pattern and
+|b:match_match| and substituted into each pattern in the matching group.
+
+The script decides whether to search forwards or backwards and chooses
+arguments for the |searchpair()| function.  Then, the cursor is moved to the
+start of the match, and |searchpair()| is called.  By default, matching
+structures inside strings and comments are ignored.  This can be changed by
+setting |b:match_skip|.
+
+==============================================================================
+2. Activation						*matchit-activate*
+
+To use the matchit plugin add this line to your |vimrc|: >
+	packadd! matchit
+
+The script should start working the next time you start Vim.
+
+(Earlier versions of the script did nothing unless a |buffer-variable| named
+|b:match_words| was defined.  Even earlier versions contained autocommands
+that set this variable for various file types.  Now, |b:match_words| is
+defined in many of the default |filetype-plugin|s instead.)
+
+For a new language, you can add autocommands to the script or to your vimrc
+file, but the recommended method is to add a line such as >
+	let b:match_words = '\<foo\>:\<bar\>'
+to the |filetype-plugin| for your language.  See |b:match_words| below for how
+this variable is interpreted.
+
+TROUBLESHOOTING					*matchit-troubleshoot*
+
+The script should work in most installations of Vim.  It may not work if Vim
+was compiled with a minimal feature set, for example if the |+syntax| option
+was not enabled.  If your Vim has support for syntax compiled in, but you do
+not have |syntax| highlighting turned on, matchit.vim should work, but it may
+fail to skip matching groups in comments and strings.  If the |filetype|
+mechanism is turned off, the |b:match_words| variable will probably not be
+defined automatically.
+
+==============================================================================
+3. Configuration					*matchit-configure*
+
+There are several variables that govern the behavior of matchit.vim.  Note
+that these are variables local to the buffer, not options, so use |:let| to
+define them, not |:set|.  Some of these variables have values that matter; for
+others, it only matters whether the variable has been defined.  All of these
+can be defined in the |filetype-plugin| or autocommand that defines
+|b:match_words| or "on the fly."
+
+The main variable is |b:match_words|.  It is described in the section below on
+supporting a new language.
+
+				*MatchError* *matchit-hl* *matchit-highlight*
+MatchError is the highlight group for error messages from the script.  By
+default, it is linked to WarningMsg.  If you do not want to be bothered by
+error messages, you can define this to be something invisible.  For example,
+if you use the GUI version of Vim and your command line is normally white, you
+can do >
+	:hi MatchError guifg=white guibg=white
+<
+						*b:match_ignorecase*
+If you >
+	:let b:match_ignorecase = 1
+then matchit.vim acts as if 'ignorecase' is set: for example, "end" and "END"
+are equivalent.  If you >
+	:let b:match_ignorecase = 0
+then matchit.vim treats "end" and "END" differently.  (There will be no
+b:match_infercase option unless someone requests it.)
+
+						*b:match_debug*
+Define b:match_debug if you want debugging information to be saved.  See
+|matchit-debug|, below.
+
+						*b:match_skip*
+If b:match_skip is defined, it is passed as the skip argument to
+|searchpair()|.  This controls when matching structures are skipped, or
+ignored.  By default, they are ignored inside comments and strings, as
+determined by the |syntax| mechanism.  (If syntax highlighting is turned off,
+nothing is skipped.)  You can set b:match_skip to a string, which evaluates to
+a non-zero, numerical value if the match is to be skipped or zero if the match
+should not be skipped.  In addition, the following special values are
+supported by matchit.vim:
+	s:foo becomes (current syntax item) =~ foo
+	S:foo becomes (current syntax item) !~ foo
+	r:foo becomes (line before cursor) =~ foo
+	R:foo becomes (line before cursor) !~ foo
+(The "s" is meant to suggest "syntax", and the "r" is meant to suggest
+"regular expression".)
+
+Examples:
+
+	You can get the default behavior with >
+		:let b:match_skip = 's:comment\|string'
+<
+	If you want to skip matching structures unless they are at the start
+	of the line (ignoring whitespace) then you can >
+		:let b:match_skip = 'R:^\s*'
+<	Do not do this if strings or comments can span several lines, since
+	the normal syntax checking will not be done if you set b:match_skip.
+
+	In LaTeX, since "%" is used as the comment character, you can >
+		:let b:match_skip = 'r:%'
+<	Unfortunately, this will skip anything after "\%", an escaped "%".  To
+	allow for this, and also "\\%" (an escaped backslash followed by the
+	comment character) you can >
+		:let b:match_skip = 'r:\(^\|[^\\]\)\(\\\\\)*%'
+<
+	See the $VIMRUNTIME/ftplugin/vim.vim for an example that uses both
+	syntax and a regular expression.
+
+==============================================================================
+4. Supporting a New Language				*matchit-newlang*
+							*b:match_words*
+In order for matchit.vim to support a new language, you must define a suitable
+pattern for |b:match_words|.  You may also want to set some of the
+|matchit-configure| variables, as described above.  If your language has a
+complicated syntax, or many keywords, you will need to know something about
+Vim's |regular-expression|s.
+
+The format for |b:match_words| is similar to that of the 'matchpairs' option:
+it is a comma (,)-separated list of groups; each group is a colon(:)-separated
+list of patterns (regular expressions).  Commas and backslashes that are part
+of a pattern should be escaped with backslashes ('\:' and '\,').  It is OK to
+have only one group; the effect is undefined if a group has only one pattern.
+A simple example is >
+	:let b:match_words = '\<if\>:\<endif\>,'
+		\ . '\<while\>:\<continue\>:\<break\>:\<endwhile\>'
+(In Vim regular expressions, |\<| and |\>| denote word boundaries.  Thus "if"
+matches the end of "endif" but "\<if\>" does not.)  Then banging on the "%"
+key will bounce the cursor between "if" and the matching "endif"; and from
+"while" to any matching "continue" or "break", then to the matching "endwhile"
+and back to the "while".  It is almost always easier to use |literal-string|s
+(single quotes) as above:  '\<if\>' rather than "\\<if\\>" and so on.
+
+Exception:  If the ":" character does not appear in b:match_words, then it is
+treated as an expression to be evaluated.  For example, >
+	:let b:match_words = 'GetMatchWords()'
+allows you to define a function.  This can return a different string depending
+on the current syntax, for example.
+
+Once you have defined the appropriate value of |b:match_words|, you will
+probably want to have this set automatically each time you edit the
+appropriate file type.  The recommended way to do this is by adding the
+definition to a |filetype-plugin| file.
+
+Tips: Be careful that your initial pattern does not match your final pattern.
+See the example above for the use of word-boundary expressions.  It is usually
+better to use ".\{-}" (as many as necessary) instead of ".*" (as many as
+possible).  See |\{-|.  For example, in the string "<tag>label</tag>", "<.*>"
+matches the whole string whereas "<.\{-}>" and "<[^>]*>" match "<tag>" and
+"</tag>".
+
+				*matchit-spaces* *matchit-s:notend*
+If "if" is to be paired with "end if" (Note the space!) then word boundaries
+are not enough.  Instead, define a regular expression s:notend that will match
+anything but "end" and use it as follows: >
+	:let s:notend = '\%(\<end\s\+\)\@<!'
+	:let b:match_words = s:notend . '\<if\>:\<end\s\+if\>'
+<							*matchit-s:sol*
+This is a simplified version of what is done for Ada.  The s:notend is a
+|script-variable|.  Similarly, you may want to define a start-of-line regular
+expression >
+	:let s:sol = '\%(^\|;\)\s*'
+if keywords are only recognized after the start of a line or after a
+semicolon (;), with optional white space.
+
+					*matchit-backref* *matchit-\1*
+In any group, the expressions |\1|, |\2|, ..., |\9| refer to parts of the
+INITIAL pattern enclosed in |\(|escaped parentheses|\)|.  These are referred
+to as back references, or backrefs.  For example, >
+	:let b:match_words = '\<b\(o\+\)\>:\(h\)\1\>'
+means that "bo" pairs with "ho" and "boo" pairs with "hoo" and so on.  Note
+that "\1" does not refer to the "\(h\)" in this example.  If you have
+"\(nested \(parentheses\)\) then "\d" refers to the d-th "\(" and everything
+up to and including the matching "\)":  in "\(nested\(parentheses\)\)", "\1"
+refers to everything and "\2" refers to "\(parentheses\)".  If you use a
+variable such as |s:notend| or |s:sol| in the previous paragraph then remember
+to count any "\(" patterns in this variable.  You do not have to count groups
+defined by |\%(\)|.
+
+It should be possible to resolve back references from any pattern in the
+group.  For example, >
+	:let b:match_words = '\(foo\)\(bar\):more\1:and\2:end\1\2'
+would not work because "\2" cannot be determined from "morefoo" and "\1"
+cannot be determined from "andbar".  On the other hand, >
+	:let b:match_words = '\(\(foo\)\(bar\)\):\3\2:end\1'
+should work (and have the same effect as "foobar:barfoo:endfoobar"), although
+this has not been thoroughly tested.
+
+You can use |zero-width| patterns such as |\@<=| and |\zs|.  (The latter has
+not been thouroughly tested in matchit.vim.)  For example, if the keyword "if"
+must occur at the start of the line, with optional white space, you might use
+the pattern "\(^\s*\)\@<=if" so that the cursor will end on the "i" instead of
+at the start of the line.  For another example, if HTML had only one tag then
+one could >
+	:let b:match_words = '<:>,<\@<=tag>:<\@<=/tag>'
+so that "%" can bounce between matching "<" and ">" pairs or (starting on
+"tag" or "/tag") between matching tags.  Without the |\@<=|, the script would
+bounce from "tag" to the "<" in "</tag>", and another "%" would not take you
+back to where you started.
+
+DEBUGGING				*matchit-debug* *:MatchDebug*
+
+If you are having trouble figuring out the appropriate definition of
+|b:match_words| then you can take advantage of the same information I use when
+debugging the script.  This is especially true if you are not sure whether
+your patterns or my script are at fault!  To make this more convenient, I have
+made the command :MatchDebug, which defines the variable |b:match_debug| and
+creates a Matchit menu.  This menu makes it convenient to check the values of
+the variables described below.  You will probably also want to read
+|matchit-details| above.
+
+Defining the variable |b:match_debug| causes the script to set the following
+variables, each time you hit the "%" key.  Several of these are only defined
+if |b:match_words| includes |backref|s.
+
+							*b:match_pat*
+The b:match_pat variable is set to |b:match_words| with |backref|s parsed.
+							*b:match_match*
+The b:match_match variable is set to the bit of text that is recognized as a
+match.
+							*b:match_col*
+The b:match_col variable is set to the cursor column of the start of the
+matching text.
+							*b:match_wholeBR*
+The b:match_wholeBR variable is set to the comma-separated group of patterns
+that matches, with |backref|s unparsed.
+							*b:match_iniBR*
+The b:match_iniBR variable is set to the first pattern in |b:match_wholeBR|.
+							*b:match_ini*
+The b:match_ini variable is set to the first pattern in |b:match_wholeBR|,
+with |backref|s resolved from |b:match_match|.
+							*b:match_tail*
+The b:match_tail variable is set to the remaining patterns in
+|b:match_wholeBR|, with |backref|s resolved from |b:match_match|.
+							*b:match_word*
+The b:match_word variable is set to the pattern from |b:match_wholeBR| that
+matches |b:match_match|.
+							*b:match_table*
+The back reference '\'.d refers to the same thing as '\'.b:match_table[d] in
+|b:match_word|.
+
+==============================================================================
+5. Known Bugs and Limitations				*matchit-bugs*
+
+Just because I know about a bug does not mean that it is on my todo list.  I
+try to respond to reports of bugs that cause real problems.  If it does not
+cause serious problems, or if there is a work-around, a bug may sit there for
+a while.  Moral:  if a bug (known or not) bothers you, let me know.
+
+It would be nice if "\0" were recognized as the entire pattern.  That is, it
+would be nice if "foo:\end\0" had the same effect as "\(foo\):\end\1".  I may
+try to implement this in a future version.  (This is not so easy to arrange as
+you might think!)
+
+==============================================================================
+vim:tw=78:fo=tcq2:ft=help:
diff --git a/runtime/pack/dist/opt/matchit/doc/tags b/runtime/pack/dist/opt/matchit/doc/tags
new file mode 100644
index 0000000..4ccdc87
--- /dev/null
+++ b/runtime/pack/dist/opt/matchit/doc/tags
@@ -0,0 +1,50 @@
+:MatchDebug	matchit.txt	/*:MatchDebug*
+MatchError	matchit.txt	/*MatchError*
+[%	matchit.txt	/*[%*
+]%	matchit.txt	/*]%*
+b:match_col	matchit.txt	/*b:match_col*
+b:match_debug	matchit.txt	/*b:match_debug*
+b:match_ignorecase	matchit.txt	/*b:match_ignorecase*
+b:match_ini	matchit.txt	/*b:match_ini*
+b:match_iniBR	matchit.txt	/*b:match_iniBR*
+b:match_match	matchit.txt	/*b:match_match*
+b:match_pat	matchit.txt	/*b:match_pat*
+b:match_skip	matchit.txt	/*b:match_skip*
+b:match_table	matchit.txt	/*b:match_table*
+b:match_tail	matchit.txt	/*b:match_tail*
+b:match_wholeBR	matchit.txt	/*b:match_wholeBR*
+b:match_word	matchit.txt	/*b:match_word*
+b:match_words	matchit.txt	/*b:match_words*
+g%	matchit.txt	/*g%*
+matchit	matchit.txt	/*matchit*
+matchit-%	matchit.txt	/*matchit-%*
+matchit-\1	matchit.txt	/*matchit-\\1*
+matchit-activate	matchit.txt	/*matchit-activate*
+matchit-backref	matchit.txt	/*matchit-backref*
+matchit-bugs	matchit.txt	/*matchit-bugs*
+matchit-choose	matchit.txt	/*matchit-choose*
+matchit-configure	matchit.txt	/*matchit-configure*
+matchit-debug	matchit.txt	/*matchit-debug*
+matchit-details	matchit.txt	/*matchit-details*
+matchit-highlight	matchit.txt	/*matchit-highlight*
+matchit-hl	matchit.txt	/*matchit-hl*
+matchit-intro	matchit.txt	/*matchit-intro*
+matchit-languages	matchit.txt	/*matchit-languages*
+matchit-modes	matchit.txt	/*matchit-modes*
+matchit-newlang	matchit.txt	/*matchit-newlang*
+matchit-o_%	matchit.txt	/*matchit-o_%*
+matchit-parse	matchit.txt	/*matchit-parse*
+matchit-s:notend	matchit.txt	/*matchit-s:notend*
+matchit-s:sol	matchit.txt	/*matchit-s:sol*
+matchit-spaces	matchit.txt	/*matchit-spaces*
+matchit-troubleshoot	matchit.txt	/*matchit-troubleshoot*
+matchit-v_%	matchit.txt	/*matchit-v_%*
+matchit.txt	matchit.txt	/*matchit.txt*
+matchit.vim	matchit.txt	/*matchit.vim*
+o_[%	matchit.txt	/*o_[%*
+o_]%	matchit.txt	/*o_]%*
+o_g%	matchit.txt	/*o_g%*
+v_[%	matchit.txt	/*v_[%*
+v_]%	matchit.txt	/*v_]%*
+v_a%	matchit.txt	/*v_a%*
+v_g%	matchit.txt	/*v_g%*
diff --git a/runtime/pack/dist/opt/matchit/plugin/matchit.vim b/runtime/pack/dist/opt/matchit/plugin/matchit.vim
new file mode 100644
index 0000000..84147f1
--- /dev/null
+++ b/runtime/pack/dist/opt/matchit/plugin/matchit.vim
@@ -0,0 +1,92 @@
+"  matchit.vim: (global plugin) Extended "%" matching
+"  Maintainer:  Christian Brabandt
+"  Version:     1.15
+"  Last Change: 2019 Jan 28
+"  Repository:  https://github.com/chrisbra/matchit
+"  Previous URL:http://www.vim.org/script.php?script_id=39
+"  Previous Maintainer:  Benji Fisher PhD   <benji@member.AMS.org>
+
+" Documentation:
+"  The documentation is in a separate file: ../doc/matchit.txt .
+
+" Credits:
+"  Vim editor by Bram Moolenaar (Thanks, Bram!)
+"  Original script and design by Raul Segura Acevedo
+"  Support for comments by Douglas Potts
+"  Support for back references and other improvements by Benji Fisher
+"  Support for many languages by Johannes Zellner
+"  Suggestions for improvement, bug reports, and support for additional
+"  languages by Jordi-Albert Batalla, Neil Bird, Servatius Brandt, Mark
+"  Collett, Stephen Wall, Dany St-Amant, Yuheng Xie, and Johannes Zellner.
+
+" Debugging:
+"  If you'd like to try the built-in debugging commands...
+"   :MatchDebug      to activate debugging for the current buffer
+"  This saves the values of several key script variables as buffer-local
+"  variables.  See the MatchDebug() function, below, for details.
+
+" TODO:  I should think about multi-line patterns for b:match_words.
+"   This would require an option:  how many lines to scan (default 1).
+"   This would be useful for Python, maybe also for *ML.
+" TODO:  Maybe I should add a menu so that people will actually use some of
+"   the features that I have implemented.
+" TODO:  Eliminate the MultiMatch function.  Add yet another argument to
+"   Match_wrapper() instead.
+" TODO:  Allow :let b:match_words = '\(\(foo\)\(bar\)\):\3\2:end\1'
+" TODO:  Make backrefs safer by using '\V' (very no-magic).
+" TODO:  Add a level of indirection, so that custom % scripts can use my
+"   work but extend it.
+
+" Allow user to prevent loading and prevent duplicate loading.
+if exists("g:loaded_matchit") || &cp
+  finish
+endif
+let g:loaded_matchit = 1
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+nnoremap <silent> <Plug>(MatchitNormalForward)     :<C-U>call matchit#Match_wrapper('',1,'n')<CR>
+nnoremap <silent> <Plug>(MatchitNormalBackward)    :<C-U>call matchit#Match_wrapper('',0,'n')<CR>
+vnoremap <silent> <Plug>(MatchitVisualForward)     :<C-U>call matchit#Match_wrapper('',1,'v')<CR>m'gv``
+vnoremap <silent> <Plug>(MatchitVisualBackward)    :<C-U>call matchit#Match_wrapper('',0,'v')<CR>m'gv``
+onoremap <silent> <Plug>(MatchitOperationForward)  :<C-U>call matchit#Match_wrapper('',1,'o')<CR>
+onoremap <silent> <Plug>(MatchitOperationBackward) :<C-U>call matchit#Match_wrapper('',0,'o')<CR>
+
+nmap <silent> %  <Plug>(MatchitNormalForward)
+nmap <silent> g% <Plug>(MatchitNormalBackward)
+xmap <silent> %  <Plug>(MatchitVisualForward)
+xmap <silent> g% <Plug>(MatchitVisualBackward)
+omap <silent> %  <Plug>(MatchitOperationForward)
+omap <silent> g% <Plug>(MatchitOperationBackward)
+
+" Analogues of [{ and ]} using matching patterns:
+nnoremap <silent> <Plug>(MatchitNormalMultiBackward)    :<C-U>call matchit#MultiMatch("bW", "n")<CR>
+nnoremap <silent> <Plug>(MatchitNormalMultiForward)     :<C-U>call matchit#MultiMatch("W",  "n")<CR>
+vnoremap <silent> <Plug>(MatchitVisualMultiBackward)    :<C-U>call matchit#MultiMatch("bW", "n")<CR>m'gv``
+vnoremap <silent> <Plug>(MatchitVisualMultiForward)     :<C-U>call matchit#MultiMatch("W",  "n")<CR>m'gv``
+onoremap <silent> <Plug>(MatchitOperationMultiBackward) :<C-U>call matchit#MultiMatch("bW", "o")<CR>
+onoremap <silent> <Plug>(MatchitOperationMultiForward)  :<C-U>call matchit#MultiMatch("W",  "o")<CR>
+
+nmap <silent> [% <Plug>(MatchitNormalMultiBackward)
+nmap <silent> ]% <Plug>(MatchitNormalMultiForward)
+xmap <silent> [% <Plug>(MatchitVisualMultiBackward)
+xmap <silent> ]% <Plug>(MatchitVisualMultiForward)
+omap <silent> [% <Plug>(MatchitOperationMultiBackward)
+omap <silent> ]% <Plug>(MatchitOperationMultiForward)
+
+" text object:
+vmap <silent> <Plug>(MatchitVisualTextObject) <Plug>(MatchitVisualMultiBackward)o<Plug>(MatchitVisualMultiForward)
+xmap a% <Plug>(MatchitVisualTextObject)
+
+" Call this function to turn on debugging information.  Every time the main
+" script is run, buffer variables will be saved.  These can be used directly
+" or viewed using the menu items below.
+if !exists(":MatchDebug")
+  command! -nargs=0 MatchDebug call matchit#Match_debug()
+endif
+
+let &cpo = s:save_cpo
+unlet s:save_cpo
+
+" vim:sts=2:sw=2:et:
diff --git a/runtime/pack/dist/opt/shellmenu/plugin/shellmenu.vim b/runtime/pack/dist/opt/shellmenu/plugin/shellmenu.vim
new file mode 100644
index 0000000..6175d1d
--- /dev/null
+++ b/runtime/pack/dist/opt/shellmenu/plugin/shellmenu.vim
@@ -0,0 +1,94 @@
+" When you're writing shell scripts and you are in doubt which test to use,
+" which shell environment variables are defined, what the syntax of the case
+" statement is, and you need to invoke 'man sh'?
+"
+" Your problems are over now!
+"
+" Attached is a Vim script file for turning gvim into a shell script editor.
+" It may also be used as an example how to use menus in Vim.
+"
+" Written by: Lennart Schultz <les@dmi.min.dk>
+
+imenu Stmts.for	for  in 
do

doneki	kk0elli
+imenu Stmts.case	case  in
) ;;
esacbki	k0elli
+imenu Stmts.if	if   
then

fiki	kk0elli
+imenu Stmts.if-else	if   
then

else

fiki	kki	kk0elli
+imenu Stmts.elif	elif   
then

ki	kk0elli
+imenu Stmts.while	while   
do

doneki	kk0elli
+imenu Stmts.break	break 
+imenu Stmts.continue	continue 
+imenu Stmts.function	() {

}ki	k0i
+imenu Stmts.return	return 
+imenu Stmts.return-true	return 0
+imenu Stmts.return-false	return 1
+imenu Stmts.exit	exit 
+imenu Stmts.shift	shift 
+imenu Stmts.trap	trap 
+imenu Test.existence	[ -e  ]hi
+imenu Test.existence - file		[ -f  ]hi
+imenu Test.existence - file (not empty)	[ -s  ]hi
+imenu Test.existence - directory	[ -d  ]hi
+imenu Test.existence - executable	[ -x  ]hi
+imenu Test.existence - readable	[ -r  ]hi
+imenu Test.existence - writable	[ -w  ]hi
+imenu Test.String is empty [ x = "x$" ]hhi
+imenu Test.String is not empty [ x != "x$" ]hhi
+imenu Test.Strings is equal [ "" = "" ]hhhhhhhi
+imenu Test.Strings is not equal [ "" != "" ]hhhhhhhhi
+imenu Test.Values is greater than [  -gt  ]hhhhhhi
+imenu Test.Values is greater equal [  -ge  ]hhhhhhi
+imenu Test.Values is equal [  -eq  ]hhhhhhi
+imenu Test.Values is not equal [  -ne  ]hhhhhhi
+imenu Test.Values is less than [  -lt  ]hhhhhhi
+imenu Test.Values is less equal [  -le  ]hhhhhhi
+imenu ParmSub.Substitute word if parm not set ${:-}hhi
+imenu ParmSub.Set parm to word if not set ${:=}hhi
+imenu ParmSub.Substitute word if parm set else nothing ${:+}hhi
+imenu ParmSub.If parm not set print word and exit ${:?}hhi
+imenu SpShVars.Number of positional parameters ${#}
+imenu SpShVars.All positional parameters (quoted spaces) ${*}
+imenu SpShVars.All positional parameters (unquoted spaces) ${@}
+imenu SpShVars.Flags set ${-}
+imenu SpShVars.Return code of last command ${?}
+imenu SpShVars.Process number of this shell ${$}
+imenu SpShVars.Process number of last background command ${!}
+imenu Environ.HOME ${HOME}
+imenu Environ.PATH ${PATH}
+imenu Environ.CDPATH ${CDPATH}
+imenu Environ.MAIL ${MAIL}
+imenu Environ.MAILCHECK ${MAILCHECK}
+imenu Environ.PS1 ${PS1}
+imenu Environ.PS2 ${PS2}
+imenu Environ.IFS ${IFS}
+imenu Environ.SHACCT ${SHACCT}
+imenu Environ.SHELL ${SHELL}
+imenu Environ.LC_CTYPE ${LC_CTYPE}
+imenu Environ.LC_MESSAGES ${LC_MESSAGES}
+imenu Builtins.cd cd
+imenu Builtins.echo echo
+imenu Builtins.eval eval
+imenu Builtins.exec exec
+imenu Builtins.export export
+imenu Builtins.getopts getopts
+imenu Builtins.hash hash
+imenu Builtins.newgrp newgrp
+imenu Builtins.pwd pwd
+imenu Builtins.read read
+imenu Builtins.readonly readonly
+imenu Builtins.return return
+imenu Builtins.times times
+imenu Builtins.type type
+imenu Builtins.umask umask
+imenu Builtins.wait wait
+imenu Set.set set
+imenu Set.unset unset
+imenu Set.mark modified or modified variables set -a
+imenu Set.exit when command returns non-zero exit code set -e
+imenu Set.Disable file name generation set -f
+imenu Set.remember function commands set -h
+imenu Set.All keyword arguments are placed in the environment set -k
+imenu Set.Read commands but do not execute them set -n
+imenu Set.Exit after reading and executing one command set -t
+imenu Set.Treat unset variables as an error when substituting set -u
+imenu Set.Print shell input lines as they are read set -v
+imenu Set.Print commands and their arguments as they are executed set -x
diff --git a/runtime/pack/dist/opt/swapmouse/plugin/swapmouse.vim b/runtime/pack/dist/opt/swapmouse/plugin/swapmouse.vim
new file mode 100644
index 0000000..8b85be0
--- /dev/null
+++ b/runtime/pack/dist/opt/swapmouse/plugin/swapmouse.vim
@@ -0,0 +1,22 @@
+" These macros swap the left and right mouse buttons (for left handed)
+" Don't forget to do ":set mouse=a" or the mouse won't work at all
+noremap	 <LeftMouse>	<RightMouse>
+noremap	 <2-LeftMouse>	<2-RightMouse>
+noremap	 <3-LeftMouse>	<3-RightMouse>
+noremap	 <4-LeftMouse>	<4-RightMouse>
+noremap	 <LeftDrag>	<RightDrag>
+noremap	 <LeftRelease>	<RightRelease>
+noremap	 <RightMouse>	<LeftMouse>
+noremap	 <2-RightMouse>	<2-LeftMouse>
+noremap	 <3-RightMouse>	<3-LeftMouse>
+noremap	 <4-RightMouse>	<4-LeftMouse>
+noremap	 <RightDrag>	<LeftDrag>
+noremap	 <RightRelease>	<LeftRelease>
+noremap	 g<LeftMouse>	<C-RightMouse>
+noremap	 g<RightMouse>	<C-LeftMouse>
+noremap! <LeftMouse>	<RightMouse>
+noremap! <LeftDrag>	<RightDrag>
+noremap! <LeftRelease>	<RightRelease>
+noremap! <RightMouse>	<LeftMouse>
+noremap! <RightDrag>	<LeftDrag>
+noremap! <RightRelease>	<LeftRelease>
diff --git a/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim b/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim
new file mode 100644
index 0000000..8468970
--- /dev/null
+++ b/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim
@@ -0,0 +1,1035 @@
+" Debugger plugin using gdb.
+"
+" Author: Bram Moolenaar
+" Copyright: Vim license applies, see ":help license"
+" Last Update: 2018 Jun 3
+"
+" WORK IN PROGRESS - Only the basics work
+" Note: On MS-Windows you need a recent version of gdb.  The one included with
+" MingW is too old (7.6.1).
+" I used version 7.12 from http://www.equation.com/servlet/equation.cmd?fa=gdb
+"
+" There are two ways to run gdb:
+" - In a terminal window; used if possible, does not work on MS-Windows
+"   Not used when g:termdebug_use_prompt is set to 1.
+" - Using a "prompt" buffer; may use a terminal window for the program
+"
+" For both the current window is used to view source code and shows the
+" current statement from gdb.
+"
+" USING A TERMINAL WINDOW
+"
+" Opens two visible terminal windows:
+" 1. runs a pty for the debugged program, as with ":term NONE"
+" 2. runs gdb, passing the pty of the debugged program
+" A third terminal window is hidden, it is used for communication with gdb.
+"
+" USING A PROMPT BUFFER
+"
+" Opens a window with a prompt buffer to communicate with gdb.
+" Gdb is run as a job with callbacks for I/O.
+" On Unix another terminal window is opened to run the debugged program
+" On MS-Windows a separate console is opened to run the debugged program
+"
+" The communication with gdb uses GDB/MI.  See:
+" https://sourceware.org/gdb/current/onlinedocs/gdb/GDB_002fMI.html
+
+" In case this gets sourced twice.
+if exists(':Termdebug')
+  finish
+endif
+
+" Need either the +terminal feature or +channel and the prompt buffer.
+" The terminal feature does not work with gdb on win32.
+if has('terminal') && !has('win32')
+  let s:way = 'terminal'
+elseif has('channel') && exists('*prompt_setprompt')
+  let s:way = 'prompt'
+else
+  if has('terminal')
+    let s:err = 'Cannot debug, missing prompt buffer support'
+  else
+    let s:err = 'Cannot debug, +channel feature is not supported'
+  endif
+  command -nargs=* -complete=file -bang Termdebug echoerr s:err
+  command -nargs=+ -complete=file -bang TermdebugCommand echoerr s:err
+  finish
+endif
+
+let s:keepcpo = &cpo
+set cpo&vim
+
+" The command that starts debugging, e.g. ":Termdebug vim".
+" To end type "quit" in the gdb window.
+command -nargs=* -complete=file -bang Termdebug call s:StartDebug(<bang>0, <f-args>)
+command -nargs=+ -complete=file -bang TermdebugCommand call s:StartDebugCommand(<bang>0, <f-args>)
+
+" Name of the gdb command, defaults to "gdb".
+if !exists('termdebugger')
+  let termdebugger = 'gdb'
+endif
+
+let s:pc_id = 12
+let s:break_id = 13  " breakpoint number is added to this
+let s:stopped = 1
+
+" Take a breakpoint number as used by GDB and turn it into an integer.
+" The breakpoint may contain a dot: 123.4 -> 123004
+" The main breakpoint has a zero subid.
+func s:Breakpoint2SignNumber(id, subid)
+  return s:break_id + a:id * 1000 + a:subid
+endfunction
+
+func s:Highlight(init, old, new)
+  let default = a:init ? 'default ' : ''
+  if a:new ==# 'light' && a:old !=# 'light'
+    exe "hi " . default . "debugPC term=reverse ctermbg=lightblue guibg=lightblue"
+  elseif a:new ==# 'dark' && a:old !=# 'dark'
+    exe "hi " . default . "debugPC term=reverse ctermbg=darkblue guibg=darkblue"
+  endif
+endfunc
+
+call s:Highlight(1, '', &background)
+hi default debugBreakpoint term=reverse ctermbg=red guibg=red
+
+func s:StartDebug(bang, ...)
+  " First argument is the command to debug, second core file or process ID.
+  call s:StartDebug_internal({'gdb_args': a:000, 'bang': a:bang})
+endfunc
+
+func s:StartDebugCommand(bang, ...)
+  " First argument is the command to debug, rest are run arguments.
+  call s:StartDebug_internal({'gdb_args': [a:1], 'proc_args': a:000[1:], 'bang': a:bang})
+endfunc
+
+func s:StartDebug_internal(dict)
+  if exists('s:gdbwin')
+    echoerr 'Terminal debugger already running'
+    return
+  endif
+  let s:ptywin = 0
+  let s:pid = 0
+
+  " Uncomment this line to write logging in "debuglog".
+  " call ch_logfile('debuglog', 'w')
+
+  let s:sourcewin = win_getid(winnr())
+  let s:startsigncolumn = &signcolumn
+
+  let s:save_columns = 0
+  if exists('g:termdebug_wide')
+    if &columns < g:termdebug_wide
+      let s:save_columns = &columns
+      let &columns = g:termdebug_wide
+    endif
+    let s:vertical = 1
+  else
+    let s:vertical = 0
+  endif
+
+  " Override using a terminal window by setting g:termdebug_use_prompt to 1.
+  let use_prompt = exists('g:termdebug_use_prompt') && g:termdebug_use_prompt
+  if has('terminal') && !has('win32') && !use_prompt
+    let s:way = 'terminal'
+  else
+    let s:way = 'prompt'
+  endif
+
+  if s:way == 'prompt'
+    call s:StartDebug_prompt(a:dict)
+  else
+    call s:StartDebug_term(a:dict)
+  endif
+endfunc
+
+" Use when debugger didn't start or ended.
+func s:CloseBuffers()
+  exe 'bwipe! ' . s:ptybuf
+  exe 'bwipe! ' . s:commbuf
+  unlet! s:gdbwin
+endfunc
+
+func s:StartDebug_term(dict)
+  " Open a terminal window without a job, to run the debugged program in.
+  let s:ptybuf = term_start('NONE', {
+        \ 'term_name': 'debugged program',
+        \ 'vertical': s:vertical,
+        \ })
+  if s:ptybuf == 0
+    echoerr 'Failed to open the program terminal window'
+    return
+  endif
+  let pty = job_info(term_getjob(s:ptybuf))['tty_out']
+  let s:ptywin = win_getid(winnr())
+  if s:vertical
+    " Assuming the source code window will get a signcolumn, use two more
+    " columns for that, thus one less for the terminal window.
+    exe (&columns / 2 - 1) . "wincmd |"
+  endif
+
+  " Create a hidden terminal window to communicate with gdb
+  let s:commbuf = term_start('NONE', {
+        \ 'term_name': 'gdb communication',
+        \ 'out_cb': function('s:CommOutput'),
+        \ 'hidden': 1,
+        \ })
+  if s:commbuf == 0
+    echoerr 'Failed to open the communication terminal window'
+    exe 'bwipe! ' . s:ptybuf
+    return
+  endif
+  let commpty = job_info(term_getjob(s:commbuf))['tty_out']
+
+  " Open a terminal window to run the debugger.
+  " Add -quiet to avoid the intro message causing a hit-enter prompt.
+  let gdb_args = get(a:dict, 'gdb_args', [])
+  let proc_args = get(a:dict, 'proc_args', [])
+
+  let cmd = [g:termdebugger, '-quiet', '-tty', pty] + gdb_args
+  call ch_log('executing "' . join(cmd) . '"')
+  let s:gdbbuf = term_start(cmd, {
+        \ 'term_finish': 'close',
+        \ })
+  if s:gdbbuf == 0
+    echoerr 'Failed to open the gdb terminal window'
+    call s:CloseBuffers()
+    return
+  endif
+  let s:gdbwin = win_getid(winnr())
+
+  " Set arguments to be run
+  if len(proc_args)
+    call term_sendkeys(s:gdbbuf, 'set args ' . join(proc_args) . "\r")
+  endif
+
+  " Connect gdb to the communication pty, using the GDB/MI interface
+  call term_sendkeys(s:gdbbuf, 'new-ui mi ' . commpty . "\r")
+
+  " Wait for the response to show up, users may not notice the error and wonder
+  " why the debugger doesn't work.
+  let try_count = 0
+  while 1
+    let gdbproc = term_getjob(s:gdbbuf)
+    if gdbproc == v:null || job_status(gdbproc) !=# 'run'
+      echoerr string(g:termdebugger) . ' exited unexpectedly'
+      call s:CloseBuffers()
+      return
+    endif
+
+    let response = ''
+    for lnum in range(1,200)
+      if term_getline(s:gdbbuf, lnum) =~ 'new-ui mi '
+        " response can be in the same line or the next line
+        let response = term_getline(s:gdbbuf, lnum) . term_getline(s:gdbbuf, lnum + 1)
+        if response =~ 'Undefined command'
+          echoerr 'Sorry, your gdb is too old, gdb 7.12 is required'
+	  call s:CloseBuffers()
+          return
+        endif
+        if response =~ 'New UI allocated'
+          " Success!
+          break
+        endif
+      endif
+    endfor
+    if response =~ 'New UI allocated'
+      break
+    endif
+    let try_count += 1
+    if try_count > 100
+      echoerr 'Cannot check if your gdb works, continuing anyway'
+      break
+    endif
+    sleep 10m
+  endwhile
+
+  " Interpret commands while the target is running.  This should usualy only be
+  " exec-interrupt, since many commands don't work properly while the target is
+  " running.
+  call s:SendCommand('-gdb-set mi-async on')
+  " Older gdb uses a different command.
+  call s:SendCommand('-gdb-set target-async on')
+
+  " Disable pagination, it causes everything to stop at the gdb
+  " "Type <return> to continue" prompt.
+  call s:SendCommand('set pagination off')
+
+  call job_setoptions(gdbproc, {'exit_cb': function('s:EndTermDebug')})
+  call s:StartDebugCommon(a:dict)
+endfunc
+
+func s:StartDebug_prompt(dict)
+  " Open a window with a prompt buffer to run gdb in.
+  if s:vertical
+    vertical new
+  else
+    new
+  endif
+  let s:gdbwin = win_getid(winnr())
+  let s:promptbuf = bufnr('')
+  call prompt_setprompt(s:promptbuf, 'gdb> ')
+  set buftype=prompt
+  file gdb
+  call prompt_setcallback(s:promptbuf, function('s:PromptCallback'))
+  call prompt_setinterrupt(s:promptbuf, function('s:PromptInterrupt'))
+
+  if s:vertical
+    " Assuming the source code window will get a signcolumn, use two more
+    " columns for that, thus one less for the terminal window.
+    exe (&columns / 2 - 1) . "wincmd |"
+  endif
+
+  " Add -quiet to avoid the intro message causing a hit-enter prompt.
+  let gdb_args = get(a:dict, 'gdb_args', [])
+  let proc_args = get(a:dict, 'proc_args', [])
+
+  let cmd = [g:termdebugger, '-quiet', '--interpreter=mi2'] + gdb_args
+  call ch_log('executing "' . join(cmd) . '"')
+
+  let s:gdbjob = job_start(cmd, {
+        \ 'exit_cb': function('s:EndPromptDebug'),
+        \ 'out_cb': function('s:GdbOutCallback'),
+        \ })
+  if job_status(s:gdbjob) != "run"
+    echoerr 'Failed to start gdb'
+    exe 'bwipe! ' . s:promptbuf
+    return
+  endif
+  " Mark the buffer modified so that it's not easy to close.
+  set modified
+  let s:gdb_channel = job_getchannel(s:gdbjob)  
+
+  " Interpret commands while the target is running.  This should usualy only
+  " be exec-interrupt, since many commands don't work properly while the
+  " target is running.
+  call s:SendCommand('-gdb-set mi-async on')
+  " Older gdb uses a different command.
+  call s:SendCommand('-gdb-set target-async on')
+
+  let s:ptybuf = 0
+  if has('win32')
+    " MS-Windows: run in a new console window for maximum compatibility
+    call s:SendCommand('set new-console on')
+  elseif has('terminal')
+    " Unix: Run the debugged program in a terminal window.  Open it below the
+    " gdb window.
+    belowright let s:ptybuf = term_start('NONE', {
+          \ 'term_name': 'debugged program',
+          \ })
+    if s:ptybuf == 0
+      echoerr 'Failed to open the program terminal window'
+      call job_stop(s:gdbjob)
+      return
+    endif
+    let s:ptywin = win_getid(winnr())
+    let pty = job_info(term_getjob(s:ptybuf))['tty_out']
+    call s:SendCommand('tty ' . pty)
+
+    " Since GDB runs in a prompt window, the environment has not been set to
+    " match a terminal window, need to do that now.
+    call s:SendCommand('set env TERM = xterm-color')
+    call s:SendCommand('set env ROWS = ' . winheight(s:ptywin))
+    call s:SendCommand('set env LINES = ' . winheight(s:ptywin))
+    call s:SendCommand('set env COLUMNS = ' . winwidth(s:ptywin))
+    call s:SendCommand('set env COLORS = ' . &t_Co)
+    call s:SendCommand('set env VIM_TERMINAL = ' . v:version)
+  else
+    " TODO: open a new terminal get get the tty name, pass on to gdb
+    call s:SendCommand('show inferior-tty')
+  endif
+  call s:SendCommand('set print pretty on')
+  call s:SendCommand('set breakpoint pending on')
+  " Disable pagination, it causes everything to stop at the gdb
+  call s:SendCommand('set pagination off')
+
+  " Set arguments to be run
+  if len(proc_args)
+    call s:SendCommand('set args ' . join(proc_args))
+  endif
+
+  call s:StartDebugCommon(a:dict)
+  startinsert
+endfunc
+
+func s:StartDebugCommon(dict)
+  " Sign used to highlight the line where the program has stopped.
+  " There can be only one.
+  sign define debugPC linehl=debugPC
+
+  " Install debugger commands in the text window.
+  call win_gotoid(s:sourcewin)
+  call s:InstallCommands()
+  call win_gotoid(s:gdbwin)
+
+  " Enable showing a balloon with eval info
+  if has("balloon_eval") || has("balloon_eval_term")
+    set balloonexpr=TermDebugBalloonExpr()
+    if has("balloon_eval")
+      set ballooneval
+    endif
+    if has("balloon_eval_term")
+      set balloonevalterm
+    endif
+  endif
+
+  " Contains breakpoints that have been placed, key is a string with the GDB
+  " breakpoint number.
+  " Each entry is a dict, containing the sub-breakpoints.  Key is the subid.
+  " For a breakpoint that is just a number the subid is zero.
+  " For a breakpoint "123.4" the id is "123" and subid is "4".
+  " Example, when breakpoint "44", "123", "123.1" and "123.2" exist:
+  " {'44': {'0': entry}, '123': {'0': entry, '1': entry, '2': entry}}
+  let s:breakpoints = {}
+
+  " Contains breakpoints by file/lnum.  The key is "fname:lnum".
+  " Each entry is a list of breakpoint IDs at that position.
+  let s:breakpoint_locations = {}
+
+  augroup TermDebug
+    au BufRead * call s:BufRead()
+    au BufUnload * call s:BufUnloaded()
+    au OptionSet background call s:Highlight(0, v:option_old, v:option_new)
+  augroup END
+
+  " Run the command if the bang attribute was given and got to the debug
+  " window.
+  if get(a:dict, 'bang', 0)
+    call s:SendCommand('-exec-run')
+    call win_gotoid(s:ptywin)
+  endif
+endfunc
+
+" Send a command to gdb.  "cmd" is the string without line terminator.
+func s:SendCommand(cmd)
+  call ch_log('sending to gdb: ' . a:cmd)
+  if s:way == 'prompt'
+    call ch_sendraw(s:gdb_channel, a:cmd . "\n")
+  else
+    call term_sendkeys(s:commbuf, a:cmd . "\r")
+  endif
+endfunc
+
+" This is global so that a user can create their mappings with this.
+func TermDebugSendCommand(cmd)
+  if s:way == 'prompt'
+    call ch_sendraw(s:gdb_channel, a:cmd . "\n")
+  else
+    let do_continue = 0
+    if !s:stopped
+      let do_continue = 1
+      call s:SendCommand('-exec-interrupt')
+      sleep 10m
+    endif
+    call term_sendkeys(s:gdbbuf, a:cmd . "\r")
+    if do_continue
+      Continue
+    endif
+  endif
+endfunc
+
+" Function called when entering a line in the prompt buffer.
+func s:PromptCallback(text)
+  call s:SendCommand(a:text)
+endfunc
+
+" Function called when pressing CTRL-C in the prompt buffer and when placing a
+" breakpoint.
+func s:PromptInterrupt()
+  call ch_log('Interrupting gdb')
+  if has('win32')
+    " Using job_stop() does not work on MS-Windows, need to send SIGTRAP to
+    " the debugger program so that gdb responds again.
+    if s:pid == 0
+      echoerr 'Cannot interrupt gdb, did not find a process ID'
+    else
+      call debugbreak(s:pid)
+    endif
+  else
+    call job_stop(s:gdbjob, 'int')
+  endif
+endfunc
+
+" Function called when gdb outputs text.
+func s:GdbOutCallback(channel, text)
+  call ch_log('received from gdb: ' . a:text)
+
+  " Drop the gdb prompt, we have our own.
+  " Drop status and echo'd commands.
+  if a:text == '(gdb) ' || a:text == '^done' || a:text[0] == '&'
+    return
+  endif
+  if a:text =~ '^^error,msg='
+    let text = s:DecodeMessage(a:text[11:])
+    if exists('s:evalexpr') && text =~ 'A syntax error in expression, near\|No symbol .* in current context'
+      " Silently drop evaluation errors.
+      unlet s:evalexpr
+      return
+    endif
+  elseif a:text[0] == '~'
+    let text = s:DecodeMessage(a:text[1:])
+  else
+    call s:CommOutput(a:channel, a:text)
+    return
+  endif
+
+  let curwinid = win_getid(winnr())
+  call win_gotoid(s:gdbwin)
+
+  " Add the output above the current prompt.
+  call append(line('$') - 1, text)
+  set modified
+
+  call win_gotoid(curwinid)
+endfunc
+
+" Decode a message from gdb.  quotedText starts with a ", return the text up
+" to the next ", unescaping characters.
+func s:DecodeMessage(quotedText)
+  if a:quotedText[0] != '"'
+    echoerr 'DecodeMessage(): missing quote in ' . a:quotedText
+    return
+  endif
+  let result = ''
+  let i = 1
+  while a:quotedText[i] != '"' && i < len(a:quotedText)
+    if a:quotedText[i] == '\'
+      let i += 1
+      if a:quotedText[i] == 'n'
+        " drop \n
+        let i += 1
+        continue
+      endif
+    endif
+    let result .= a:quotedText[i]
+    let i += 1
+  endwhile
+  return result
+endfunc
+
+" Extract the "name" value from a gdb message with fullname="name".
+func s:GetFullname(msg)
+  if a:msg !~ 'fullname'
+    return ''
+  endif
+  let name = s:DecodeMessage(substitute(a:msg, '.*fullname=', '', ''))
+  if has('win32') && name =~ ':\\\\'
+    " sometimes the name arrives double-escaped
+    let name = substitute(name, '\\\\', '\\', 'g')
+  endif
+  return name
+endfunc
+
+func s:EndTermDebug(job, status)
+  exe 'bwipe! ' . s:commbuf
+  unlet s:gdbwin
+
+  call s:EndDebugCommon()
+endfunc
+
+func s:EndDebugCommon()
+  let curwinid = win_getid(winnr())
+
+  if exists('s:ptybuf') && s:ptybuf
+    exe 'bwipe! ' . s:ptybuf
+  endif
+
+  call win_gotoid(s:sourcewin)
+  let &signcolumn = s:startsigncolumn
+  call s:DeleteCommands()
+
+  call win_gotoid(curwinid)
+
+  if s:save_columns > 0
+    let &columns = s:save_columns
+  endif
+
+  if has("balloon_eval") || has("balloon_eval_term")
+    set balloonexpr=
+    if has("balloon_eval")
+      set noballooneval
+    endif
+    if has("balloon_eval_term")
+      set noballoonevalterm
+    endif
+  endif
+
+  au! TermDebug
+endfunc
+
+func s:EndPromptDebug(job, status)
+  let curwinid = win_getid(winnr())
+  call win_gotoid(s:gdbwin)
+  set nomodified
+  close
+  if curwinid != s:gdbwin
+    call win_gotoid(curwinid)
+  endif
+
+  call s:EndDebugCommon()
+  unlet s:gdbwin
+  call ch_log("Returning from EndPromptDebug()")
+endfunc
+
+" Handle a message received from gdb on the GDB/MI interface.
+func s:CommOutput(chan, msg)
+  let msgs = split(a:msg, "\r")
+
+  for msg in msgs
+    " remove prefixed NL
+    if msg[0] == "\n"
+      let msg = msg[1:]
+    endif
+    if msg != ''
+      if msg =~ '^\(\*stopped\|\*running\|=thread-selected\)'
+        call s:HandleCursor(msg)
+      elseif msg =~ '^\^done,bkpt=' || msg =~ '^=breakpoint-created,'
+        call s:HandleNewBreakpoint(msg)
+      elseif msg =~ '^=breakpoint-deleted,'
+        call s:HandleBreakpointDelete(msg)
+      elseif msg =~ '^=thread-group-started'
+        call s:HandleProgramRun(msg)
+      elseif msg =~ '^\^done,value='
+        call s:HandleEvaluate(msg)
+      elseif msg =~ '^\^error,msg='
+        call s:HandleError(msg)
+      endif
+    endif
+  endfor
+endfunc
+
+" Install commands in the current window to control the debugger.
+func s:InstallCommands()
+  let save_cpo = &cpo
+  set cpo&vim
+
+  command Break call s:SetBreakpoint()
+  command Clear call s:ClearBreakpoint()
+  command Step call s:SendCommand('-exec-step')
+  command Over call s:SendCommand('-exec-next')
+  command Finish call s:SendCommand('-exec-finish')
+  command -nargs=* Run call s:Run(<q-args>)
+  command -nargs=* Arguments call s:SendCommand('-exec-arguments ' . <q-args>)
+  command Stop call s:SendCommand('-exec-interrupt')
+
+  " using -exec-continue results in CTRL-C in gdb window not working
+  if s:way == 'prompt'
+    command Continue call s:SendCommand('continue')
+  else
+    command Continue call term_sendkeys(s:gdbbuf, "continue\r")
+  endif
+
+  command -range -nargs=* Evaluate call s:Evaluate(<range>, <q-args>)
+  command Gdb call win_gotoid(s:gdbwin)
+  command Program call win_gotoid(s:ptywin)
+  command Source call s:GotoSourcewinOrCreateIt()
+  command Winbar call s:InstallWinbar()
+
+  " TODO: can the K mapping be restored?
+  nnoremap K :Evaluate<CR>
+
+  if has('menu') && &mouse != ''
+    call s:InstallWinbar()
+
+    if !exists('g:termdebug_popup') || g:termdebug_popup != 0
+      let s:saved_mousemodel = &mousemodel
+      let &mousemodel = 'popup_setpos'
+      an 1.200 PopUp.-SEP3-	<Nop>
+      an 1.210 PopUp.Set\ breakpoint	:Break<CR>
+      an 1.220 PopUp.Clear\ breakpoint	:Clear<CR>
+      an 1.230 PopUp.Evaluate		:Evaluate<CR>
+    endif
+  endif
+
+  let &cpo = save_cpo
+endfunc
+
+let s:winbar_winids = []
+
+" Install the window toolbar in the current window.
+func s:InstallWinbar()
+  if has('menu') && &mouse != ''
+    nnoremenu WinBar.Step   :Step<CR>
+    nnoremenu WinBar.Next   :Over<CR>
+    nnoremenu WinBar.Finish :Finish<CR>
+    nnoremenu WinBar.Cont   :Continue<CR>
+    nnoremenu WinBar.Stop   :Stop<CR>
+    nnoremenu WinBar.Eval   :Evaluate<CR>
+    call add(s:winbar_winids, win_getid(winnr()))
+  endif
+endfunc
+
+" Delete installed debugger commands in the current window.
+func s:DeleteCommands()
+  delcommand Break
+  delcommand Clear
+  delcommand Step
+  delcommand Over
+  delcommand Finish
+  delcommand Run
+  delcommand Arguments
+  delcommand Stop
+  delcommand Continue
+  delcommand Evaluate
+  delcommand Gdb
+  delcommand Program
+  delcommand Source
+  delcommand Winbar
+
+  nunmap K
+
+  if has('menu')
+    " Remove the WinBar entries from all windows where it was added.
+    let curwinid = win_getid(winnr())
+    for winid in s:winbar_winids
+      if win_gotoid(winid)
+        aunmenu WinBar.Step
+        aunmenu WinBar.Next
+        aunmenu WinBar.Finish
+        aunmenu WinBar.Cont
+        aunmenu WinBar.Stop
+        aunmenu WinBar.Eval
+      endif
+    endfor
+    call win_gotoid(curwinid)
+    let s:winbar_winids = []
+
+    if exists('s:saved_mousemodel')
+      let &mousemodel = s:saved_mousemodel
+      unlet s:saved_mousemodel
+      aunmenu PopUp.-SEP3-
+      aunmenu PopUp.Set\ breakpoint
+      aunmenu PopUp.Clear\ breakpoint
+      aunmenu PopUp.Evaluate
+    endif
+  endif
+
+  exe 'sign unplace ' . s:pc_id
+  for [id, entries] in items(s:breakpoints)
+    for subid in keys(entries)
+      exe 'sign unplace ' . s:Breakpoint2SignNumber(id, subid)
+    endfor
+  endfor
+  unlet s:breakpoints
+  unlet s:breakpoint_locations
+
+  sign undefine debugPC
+  for val in s:BreakpointSigns
+    exe "sign undefine debugBreakpoint" . val
+  endfor
+  let s:BreakpointSigns = []
+endfunc
+
+" :Break - Set a breakpoint at the cursor position.
+func s:SetBreakpoint()
+  " Setting a breakpoint may not work while the program is running.
+  " Interrupt to make it work.
+  let do_continue = 0
+  if !s:stopped
+    let do_continue = 1
+    if s:way == 'prompt'
+      call s:PromptInterrupt()
+    else
+      call s:SendCommand('-exec-interrupt')
+    endif
+    sleep 10m
+  endif
+  " Use the fname:lnum format, older gdb can't handle --source.
+  call s:SendCommand('-break-insert '
+        \ . fnameescape(expand('%:p')) . ':' . line('.'))
+  if do_continue
+    call s:SendCommand('-exec-continue')
+  endif
+endfunc
+
+" :Clear - Delete a breakpoint at the cursor position.
+func s:ClearBreakpoint()
+  let fname = fnameescape(expand('%:p'))
+  let lnum = line('.')
+  let bploc = printf('%s:%d', fname, lnum)
+  if has_key(s:breakpoint_locations, bploc)
+    let idx = 0
+    for id in s:breakpoint_locations[bploc]
+      if has_key(s:breakpoints, id)
+        " Assume this always works, the reply is simply "^done".
+        call s:SendCommand('-break-delete ' . id)
+        for subid in keys(s:breakpoints[id])
+          exe 'sign unplace ' . s:Breakpoint2SignNumber(id, subid)
+        endfor
+        unlet s:breakpoints[id]
+        unlet s:breakpoint_locations[bploc][idx]
+        break
+      else
+	let idx += 1
+      endif
+    endfor
+    if empty(s:breakpoint_locations[bploc])
+      unlet s:breakpoint_locations[bploc]
+    endif
+  endif
+endfunc
+
+func s:Run(args)
+  if a:args != ''
+    call s:SendCommand('-exec-arguments ' . a:args)
+  endif
+  call s:SendCommand('-exec-run')
+endfunc
+
+func s:SendEval(expr)
+  call s:SendCommand('-data-evaluate-expression "' . a:expr . '"')
+  let s:evalexpr = a:expr
+endfunc
+
+" :Evaluate - evaluate what is under the cursor
+func s:Evaluate(range, arg)
+  if a:arg != ''
+    let expr = a:arg
+  elseif a:range == 2
+    let pos = getcurpos()
+    let reg = getreg('v', 1, 1)
+    let regt = getregtype('v')
+    normal! gv"vy
+    let expr = @v
+    call setpos('.', pos)
+    call setreg('v', reg, regt)
+  else
+    let expr = expand('<cexpr>')
+  endif
+  let s:ignoreEvalError = 0
+  call s:SendEval(expr)
+endfunc
+
+let s:ignoreEvalError = 0
+let s:evalFromBalloonExpr = 0
+
+" Handle the result of data-evaluate-expression
+func s:HandleEvaluate(msg)
+  let value = substitute(a:msg, '.*value="\(.*\)"', '\1', '')
+  let value = substitute(value, '\\"', '"', 'g')
+  if s:evalFromBalloonExpr
+    if s:evalFromBalloonExprResult == ''
+      let s:evalFromBalloonExprResult = s:evalexpr . ': ' . value
+    else
+      let s:evalFromBalloonExprResult .= ' = ' . value
+    endif
+    call balloon_show(s:evalFromBalloonExprResult)
+  else
+    echomsg '"' . s:evalexpr . '": ' . value
+  endif
+
+  if s:evalexpr[0] != '*' && value =~ '^0x' && value != '0x0' && value !~ '"$'
+    " Looks like a pointer, also display what it points to.
+    let s:ignoreEvalError = 1
+    call s:SendEval('*' . s:evalexpr)
+  else
+    let s:evalFromBalloonExpr = 0
+  endif
+endfunc
+
+" Show a balloon with information of the variable under the mouse pointer,
+" if there is any.
+func TermDebugBalloonExpr()
+  if v:beval_winid != s:sourcewin
+    return
+  endif
+  if !s:stopped
+    " Only evaluate when stopped, otherwise setting a breakpoint using the
+    " mouse triggers a balloon.
+    return
+  endif
+  let s:evalFromBalloonExpr = 1
+  let s:evalFromBalloonExprResult = ''
+  let s:ignoreEvalError = 1
+  call s:SendEval(v:beval_text)
+  return ''
+endfunc
+
+" Handle an error.
+func s:HandleError(msg)
+  if s:ignoreEvalError
+    " Result of s:SendEval() failed, ignore.
+    let s:ignoreEvalError = 0
+    let s:evalFromBalloonExpr = 0
+    return
+  endif
+  echoerr substitute(a:msg, '.*msg="\(.*\)"', '\1', '')
+endfunc
+
+func s:GotoSourcewinOrCreateIt()
+  if !win_gotoid(s:sourcewin)
+    new
+    let s:sourcewin = win_getid(winnr())
+    call s:InstallWinbar()
+  endif
+endfunc
+
+" Handle stopping and running message from gdb.
+" Will update the sign that shows the current position.
+func s:HandleCursor(msg)
+  let wid = win_getid(winnr())
+
+  if a:msg =~ '^\*stopped'
+    call ch_log('program stopped')
+    let s:stopped = 1
+  elseif a:msg =~ '^\*running'
+    call ch_log('program running')
+    let s:stopped = 0
+  endif
+
+  if a:msg =~ 'fullname='
+    let fname = s:GetFullname(a:msg)
+  else
+    let fname = ''
+  endif
+  if a:msg =~ '^\(\*stopped\|=thread-selected\)' && filereadable(fname)
+    let lnum = substitute(a:msg, '.*line="\([^"]*\)".*', '\1', '')
+    if lnum =~ '^[0-9]*$'
+    call s:GotoSourcewinOrCreateIt()
+      if expand('%:p') != fnamemodify(fname, ':p')
+        if &modified
+          " TODO: find existing window
+          exe 'split ' . fnameescape(fname)
+          let s:sourcewin = win_getid(winnr())
+          call s:InstallWinbar()
+        else
+          exe 'edit ' . fnameescape(fname)
+        endif
+      endif
+      exe lnum
+      exe 'sign unplace ' . s:pc_id
+      exe 'sign place ' . s:pc_id . ' line=' . lnum . ' name=debugPC file=' . fname
+      setlocal signcolumn=yes
+    endif
+  elseif !s:stopped || fname != ''
+    exe 'sign unplace ' . s:pc_id
+  endif
+
+  call win_gotoid(wid)
+endfunc
+
+let s:BreakpointSigns = []
+
+func s:CreateBreakpoint(id, subid)
+  let nr = printf('%d.%d', a:id, a:subid)
+  if index(s:BreakpointSigns, nr) == -1
+    call add(s:BreakpointSigns, nr)
+    exe "sign define debugBreakpoint" . nr . " text=" . substitute(nr, '\..*', '', '') . " texthl=debugBreakpoint"
+  endif
+endfunc
+
+func! s:SplitMsg(s)
+  return split(a:s, '{.\{-}}\zs')
+endfunction
+
+" Handle setting a breakpoint
+" Will update the sign that shows the breakpoint
+func s:HandleNewBreakpoint(msg)
+  if a:msg !~ 'fullname='
+    " a watch does not have a file name
+    return
+  endif
+  for msg in s:SplitMsg(a:msg)
+    let fname = s:GetFullname(msg)
+    if empty(fname)
+      continue
+    endif
+    let nr = substitute(msg, '.*number="\([0-9.]*\)\".*', '\1', '')
+    if empty(nr)
+      return
+    endif
+
+    " If "nr" is 123 it becomes "123.0" and subid is "0".
+    " If "nr" is 123.4 it becomes "123.4.0" and subid is "4"; "0" is discarded.
+    let [id, subid; _] = map(split(nr . '.0', '\.'), 'v:val + 0')
+    call s:CreateBreakpoint(id, subid)
+
+    if has_key(s:breakpoints, id)
+      let entries = s:breakpoints[id]
+    else
+      let entries = {}
+      let s:breakpoints[id] = entries
+    endif
+    if has_key(entries, subid)
+      let entry = entries[subid]
+    else
+      let entry = {}
+      let entries[subid] = entry
+    endif
+
+    let lnum = substitute(msg, '.*line="\([^"]*\)".*', '\1', '')
+    let entry['fname'] = fname
+    let entry['lnum'] = lnum
+
+    let bploc = printf('%s:%d', fname, lnum)
+    if !has_key(s:breakpoint_locations, bploc)
+      let s:breakpoint_locations[bploc] = []
+    endif
+    let s:breakpoint_locations[bploc] += [id]
+
+    if bufloaded(fname)
+      call s:PlaceSign(id, subid, entry)
+    endif
+  endfor
+endfunc
+
+func s:PlaceSign(id, subid, entry)
+  let nr = printf('%d.%d', a:id, a:subid)
+  exe 'sign place ' . s:Breakpoint2SignNumber(a:id, a:subid) . ' line=' . a:entry['lnum'] . ' name=debugBreakpoint' . nr . ' file=' . a:entry['fname']
+  let a:entry['placed'] = 1
+endfunc
+
+" Handle deleting a breakpoint
+" Will remove the sign that shows the breakpoint
+func s:HandleBreakpointDelete(msg)
+  let id = substitute(a:msg, '.*id="\([0-9]*\)\".*', '\1', '') + 0
+  if empty(id)
+    return
+  endif
+  if has_key(s:breakpoints, id)
+    for [subid, entry] in items(s:breakpoints[id])
+      if has_key(entry, 'placed')
+        exe 'sign unplace ' . s:Breakpoint2SignNumber(id, subid)
+        unlet entry['placed']
+      endif
+    endfor
+    unlet s:breakpoints[id]
+  endif
+endfunc
+
+" Handle the debugged program starting to run.
+" Will store the process ID in s:pid
+func s:HandleProgramRun(msg)
+  let nr = substitute(a:msg, '.*pid="\([0-9]*\)\".*', '\1', '') + 0
+  if nr == 0
+    return
+  endif
+  let s:pid = nr
+  call ch_log('Detected process ID: ' . s:pid)
+endfunc
+
+" Handle a BufRead autocommand event: place any signs.
+func s:BufRead()
+  let fname = expand('<afile>:p')
+  for [id, entries] in items(s:breakpoints)
+    for [subid, entry] in items(entries)
+      if entry['fname'] == fname
+        call s:PlaceSign(id, subid, entry)
+      endif
+    endfor
+  endfor
+endfunc
+
+" Handle a BufUnloaded autocommand event: unplace any signs.
+func s:BufUnloaded()
+  let fname = expand('<afile>:p')
+  for [id, entries] in items(s:breakpoints)
+    for [subid, entry] in items(entries)
+      if entry['fname'] == fname
+        let entry['placed'] = 0
+      endif
+    endfor
+  endfor
+endfunc
+
+let &cpo = s:keepcpo
+unlet s:keepcpo