Hi
On Di, 23 Aug 2011, Christ van Willegen wrote:
> Hello Christian,
>
> On Mon, Aug 22, 2011 at 22:35, Christian Brabandt <[email protected]> wrote:
> > I see. Attached patch fixes it.
>
> I was curious and read your patch. The "%:" I saw in the patch made me
> (even more) curious, and I read
> http://en.wikipedia.org/wiki/Digraphs_and_trigraphs to see if I
> guessed right to see if it was a C digraph (I've never used them
> myself, all the keyboards I've used had # and {} on them ;-) )
>
> Just above the table that lists %: as a digraph for #, there's a table
> of trigraphs mentioning ??= as well, but I didn't see that in the
> syntax file. I guess this one has (almost completely?) fallen from
> usage, but wouldn't it be more complete to also specify this trigraph
> in the regular expression(s)? It's probably a PITA to support them,
> but for completeness sake...
Thanks for mentioning it. I didn't even know, that those features are
supported by the preprocessor. Anyway, here is an updated patch, that
also supports ??= as trigraph for #.
Bram can then decide, whether he likes to support this for C syntax
files or not.
regards,
Christian
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diff --git a/runtime/syntax/c.vim b/runtime/syntax/c.vim
--- a/runtime/syntax/c.vim
+++ b/runtime/syntax/c.vim
@@ -271,37 +271,37 @@
syn keyword cConstant true false
endif
-" Accept %: for # (C99)
-syn region cPreCondit start="^\s*\(%:\|#\)\s*\(if\|ifdef\|ifndef\|elif\)\>" skip="\\$" end="$" keepend contains=cComment,cCommentL,cCppString,cCharacter,cCppParen,cParenError,cNumbers,cCommentError,cSpaceError
-syn match cPreConditMatch display "^\s*\(%:\|#\)\s*\(else\|endif\|elif\)\>"
+" Accept %: and ??= (digraphs and trigraphs) for # (C99)
+syn region cPreCondit start="^\s*\(??=\|%:\|#\)\s*\(if\|ifdef\|ifndef\|elif\)\>" skip="\\$" end="$" keepend contains=cComment,cCommentL,cCppString,cCharacter,cCppParen,cParenError,cNumbers,cCommentError,cSpaceError
+syn match cPreConditMatch display "^\s*\(??=\|%:\|#\)\s*\(else\|endif\|elif\)\>"
if !exists("c_no_if0")
syn cluster cCppOutInGroup contains=cCppInIf,cCppInElse,cCppInElse2,cCppOutIf,cCppOutIf2,cCppOutElse,cCppInSkip,cCppOutSkip
- syn region cCppOutWrapper start="^\s*\(%:\|#\)\s*if\s\+0\+\s*\($\|//\|/\*\|&\)" end=".\@=\|$" contains=cCppOutIf,cCppOutElse
+ syn region cCppOutWrapper start="^\s*\(??=\|%:\|#\)\s*if\s\+0\+\s*\($\|//\|/\*\|&\)" end=".\@=\|$" contains=cCppOutIf,cCppOutElse fold
syn region cCppOutIf contained start="0\+" matchgroup=cCppOutWrapper end="^\s*\(%:\|#\)\s*endif\>" contains=cCppOutIf2,cCppOutElse
if !exists("c_no_if0_fold")
- syn region cCppOutIf2 contained matchgroup=cCppOutWrapper start="0\+" end="^\s*\(%:\|#\)\s*\(else\>\|elif\s\+\(0\+\s*\($\|//\|/\*\|&\)\)\@!\|endif\>\)"me=s-1 contains=cSpaceError,cCppOutSkip
+ syn region cCppOutIf2 contained matchgroup=cCppOutWrapper start="0\+" end="^\s*\(??=\|%:\|#\)\s*\(else\>\|elif\s\+\(0\+\s*\($\|//\|/\*\|&\)\)\@!\|endif\>\)"me=s-1 contains=cSpaceError,cCppOutSkip
else
- syn region cCppOutIf2 contained matchgroup=cCppOutWrapper start="0\+" end="^\s*\(%:\|#\)\s*\(else\>\|elif\s\+\(0\+\s*\($\|//\|/\*\|&\)\)\@!\|endif\>\)"me=s-1 contains=cSpaceError,cCppOutSkip fold
+ syn region cCppOutIf2 contained matchgroup=cCppOutWrapper start="0\+" end="^\s*\(??=\|%:\|#\)\s*\(else\>\|elif\s\+\(0\+\s*\($\|//\|/\*\|&\)\)\@!\|endif\>\)"me=s-1 contains=cSpaceError,cCppOutSkip fold
endif
- syn region cCppOutElse contained matchgroup=cCppOutWrapper start="^\s*\(%:\|#\)\s*\(else\|elif\)" end="^\s*\(%:\|#\)\s*endif\>"me=s-1 contains=TOP,cPreCondit
- syn region cCppInWrapper start="^\s*\(%:\|#\)\s*if\s\+0*[1-9]\d*\s*\($\|//\|/\*\||\)" end=".\@=\|$" contains=cCppInIf,cCppInElse
- syn region cCppInIf contained matchgroup=cCppInWrapper start="\d\+" end="^\s*\(%:\|#\)\s*endif\>" contains=TOP,cPreCondit
+ syn region cCppOutElse contained matchgroup=cCppOutWrapper start="^\s*\(??=\|%:\|#\)\s*\(else\|elif\)" end="^\s*\(%:\|#\)\s*endif\>"me=s-1 contains=TOP,cPreCondit
+ syn region cCppInWrapper start="^\s*\(??=\|%:\|#\)\s*if\s\+0*[1-9]\d*\s*\($\|//\|/\*\||\)" end=".\@=\|$" contains=cCppInIf,cCppInElse fold
+ syn region cCppInIf contained matchgroup=cCppInWrapper start="\d\+" end="^\s*\(??=\|%:\|#\)\s*endif\>" contains=TOP,cPreCondit
if !exists("c_no_if0_fold")
- syn region cCppInElse contained start="^\s*\(%:\|#\)\s*\(else\>\|elif\s\+\(0*[1-9]\d*\s*\($\|//\|/\*\||\)\)\@!\)" end=".\@=\|$" containedin=cCppInIf contains=cCppInElse2 fold
+ syn region cCppInElse contained start="^\s*\(??=\|%:\|#\)\s*\(else\>\|elif\s\+\(0*[1-9]\d*\s*\($\|//\|/\*\||\)\)\@!\)" end=".\@=\|$" containedin=cCppInIf contains=cCppInElse2 fold
else
- syn region cCppInElse contained start="^\s*\(%:\|#\)\s*\(else\>\|elif\s\+\(0*[1-9]\d*\s*\($\|//\|/\*\||\)\)\@!\)" end=".\@=\|$" containedin=cCppInIf contains=cCppInElse2
+ syn region cCppInElse contained start="^\s*\(??=\|%:\|#\)\s*\(else\>\|elif\s\+\(0*[1-9]\d*\s*\($\|//\|/\*\||\)\)\@!\)" end=".\@=\|$" containedin=cCppInIf contains=cCppInElse2
endif
- syn region cCppInElse2 contained matchgroup=cCppInWrapper start="^\s*\(%:\|#\)\s*\(else\|elif\)\([^/]\|/[^/*]\)*" end="^\s*\(%:\|#\)\s*endif\>"me=s-1 contains=cSpaceError,cCppOutSkip
- syn region cCppOutSkip contained start="^\s*\(%:\|#\)\s*\(if\>\|ifdef\>\|ifndef\>\)" skip="\\$" end="^\s*\(%:\|#\)\s*endif\>" contains=cSpaceError,cCppOutSkip
- syn region cCppInSkip contained matchgroup=cCppInWrapper start="^\s*\(%:\|#\)\s*\(if\s\+\(\d\+\s*\($\|//\|/\*\||\|&\)\)\@!\|ifdef\>\|ifndef\>\)" skip="\\$" end="^\s*\(%:\|#\)\s*endif\>" containedin=cCppOutElse,cCppInIf,cCppInSkip contains=TOP,cPreProc
+ syn region cCppInElse2 contained matchgroup=cCppInWrapper start="^\s*\(??=\|%:\|#\)\s*\(else\|elif\)\([^/]\|/[^/*]\)*" end="^\s*\(??=\|%:\|#\)\s*endif\>"me=s-1 contains=cSpaceError,cCppOutSkip
+ syn region cCppOutSkip contained start="^\s*\(??=\|%:\|#\)\s*\(if\>\|ifdef\>\|ifndef\>\)" skip="\\$" end="^\s*\(??=\|%:\|#\)\s*endif\>" contains=cSpaceError,cCppOutSkip
+ syn region cCppInSkip contained matchgroup=cCppInWrapper start="^\s*\(??=\|%:\|#\)\s*\(if\s\+\(\d\+\s*\($\|//\|/\*\||\|&\)\)\@!\|ifdef\>\|ifndef\>\)" skip="\\$" end="^\s*\(??=\|%:\|#\)\s*endif\>" containedin=cCppOutElse,cCppInIf,cCppInSkip contains=TOP,cPreProc
endif
syn region cIncluded display contained start=+"+ skip=+\\\\\|\\"+ end=+"+
syn match cIncluded display contained "<[^>]*>"
-syn match cInclude display "^\s*\(%:\|#\)\s*include\>\s*["<]" contains=cIncluded
+syn match cInclude display "^\s*\(??=\|%:\|#\)\s*include\>\s*["<]" contains=cIncluded
"syn match cLineSkip "\\$"
syn cluster cPreProcGroup contains=cPreCondit,cIncluded,cInclude,cDefine,cErrInParen,cErrInBracket,cUserLabel,cSpecial,cOctalZero,cCppOutWrapper,cCppInWrapper,@cCppOutInGroup,cFormat,cNumber,cFloat,cOctal,cOctalError,cNumbersCom,cString,cCommentSkip,cCommentString,cComment2String,@cCommentGroup,cCommentStartError,cParen,cBracket,cMulti
-syn region cDefine start="^\s*\(%:\|#\)\s*\(define\|undef\)\>" skip="\\$" end="$" keepend contains=ALLBUT,@cPreProcGroup,@Spell
-syn region cPreProc start="^\s*\(%:\|#\)\s*\(pragma\>\|line\>\|warning\>\|warn\>\|error\>\)" skip="\\$" end="$" keepend contains=ALLBUT,@cPreProcGroup,@Spell
+syn region cDefine start="^\s*\(??=\|%:\|#\)\s*\(define\|undef\)\>" skip="\\$" end="$" keepend contains=ALLBUT,@cPreProcGroup,@Spell
+syn region cPreProc start="^\s*\(??=\|%:\|#\)\s*\(pragma\>\|line\>\|warning\>\|warn\>\|error\>\)" skip="\\$" end="$" keepend contains=ALLBUT,@cPreProcGroup,@Spell
" Highlight User Labels
syn cluster cMultiGroup contains=cIncluded,cSpecial,cCommentSkip,cCommentString,cComment2String,@cCommentGroup,cCommentStartError,cUserCont,cUserLabel,cBitField,cOctalZero,cCppOutWrapper,cCppInWrapper,@cCppOutInGroup,cFormat,cNumber,cFloat,cOctal,cOctalError,cNumbersCom,cCppParen,cCppBracket,cCppString
