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vim/runtime/ftplugin/c.vim

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" Vim filetype plugin file
" Language: C
" Maintainer: The Vim Project <https://github.com/vim/vim>
" Last Change: 2023 Aug 22
" 2024 Jun 02 by Riley Bruins <ribru17@gmail.com> ('commentstring')
" Former Maintainer: Bram Moolenaar <Bram@vim.org>
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" Only do this when not done yet for this buffer
if exists("b:did_ftplugin")
finish
endif
" Don't load another plugin for this buffer
let b:did_ftplugin = 1
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" Using line continuation here.
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let s:cpo_save = &cpo
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set cpo-=C
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let b:undo_ftplugin = "setl fo< com< ofu< cms< def< inc< | if has('vms') | setl isk< | endif"
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" Set 'formatoptions' to break comment lines but not other lines,
" and insert the comment leader when hitting <CR> or using "o".
setlocal fo-=t fo+=croql
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" These options have the right value as default, but the user may have
" overruled that.
setlocal commentstring=/*\ %s\ */ define& include&
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" Set completion with CTRL-X CTRL-O to autoloaded function.
if exists('&ofu')
setlocal ofu=ccomplete#Complete
endif
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" Set 'comments' to format dashed lists in comments.
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" Also include ///, used for Doxygen.
setlocal comments=sO:*\ -,mO:*\ \ ,exO:*/,s1:/*,mb:*,ex:*/,:///,://
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" In VMS C keywords contain '$' characters.
if has("vms")
setlocal iskeyword+=$
endif
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" When the matchit plugin is loaded, this makes the % command skip parens and
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" braces in comments properly.
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if !exists("b:match_words")
let b:match_words = '^\s*#\s*if\%(\|def\|ndef\)\>:^\s*#\s*elif\%(\|def\|ndef\)\>:^\s*#\s*else\>:^\s*#\s*endif\>'
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let b:match_skip = 's:comment\|string\|character\|special'
let b:undo_ftplugin ..= " | unlet! b:match_skip b:match_words"
endif
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" Win32 and GTK can filter files in the browse dialog
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if (has("gui_win32") || has("gui_gtk")) && !exists("b:browsefilter")
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if &ft == "cpp"
let b:browsefilter = "C++ Source Files (*.cpp, *.c++)\t*.cpp;*.c++\n" ..
\ "C Header Files (*.h)\t*.h\n" ..
\ "C Source Files (*.c)\t*.c\n"
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elseif &ft == "ch"
let b:browsefilter = "Ch Source Files (*.ch, *.chf)\t*.ch;*.chf\n" ..
\ "C Header Files (*.h)\t*.h\n" ..
\ "C Source Files (*.c)\t*.c\n"
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else
let b:browsefilter = "C Source Files (*.c)\t*.c\n" ..
\ "C Header Files (*.h)\t*.h\n" ..
\ "Ch Source Files (*.ch, *.chf)\t*.ch;*.chf\n" ..
\ "C++ Source Files (*.cpp, *.c++)\t*.cpp;*.c++\n"
endif
if has("win32")
let b:browsefilter ..= "All Files (*.*)\t*\n"
else
let b:browsefilter ..= "All Files (*)\t*\n"
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endif
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let b:undo_ftplugin ..= " | unlet! b:browsefilter"
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endif
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let &cpo = s:cpo_save
unlet s:cpo_save