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Improve syntax regexp performance
authorHiroshi Shirosaki <h.shirosaki@gmail.com>
Tue, 19 Jan 2016 01:36:56 +0000 (10:36 +0900)
committerHiroshi Shirosaki <h.shirosaki@gmail.com>
Tue, 19 Jan 2016 01:36:56 +0000 (10:36 +0900)
Use \zs instead of \@<= if possible.

syntax/markdown.vim

index 63429b3618e805fa50a457c21c513159d14a479f..f14c8672a779577d1aa52f9e36e86d37dc5d5a0b 100644 (file)
@@ -35,12 +35,12 @@ syn case ignore
 syn sync linebreaks=1
 
 "additions to HTML groups
-syn region htmlItalic start="\\\@<!\*\S\@=" end="\S\@<=\\\@<!\*" keepend oneline
+syn region htmlItalic start="\\\@<!\*\S\@=" end="\S\zs\\\@<!\*" keepend oneline
 syn region htmlItalic start="\(^\|\s\)\@<=_\|\\\@<!_\([^_]\+\s\)\@=" end="\S\@<=[^\\]_\|[^\\]_\S\@=" keepend oneline
-syn region htmlBold start="\S\@<=\*\*\|\*\*\S\@=" end="\S\@<=\*\*\|\*\*\S\@=" keepend oneline
-syn region htmlBold start="\S\@<=__\|__\S\@=" end="\S\@<=__\|__\S\@=" keepend oneline
-syn region htmlBoldItalic start="\S\@<=\*\*\*\|\*\*\*\S\@=" end="\S\@<=\*\*\*\|\*\*\*\S\@=" keepend oneline
-syn region htmlBoldItalic start="\S\@<=___\|___\S\@=" end="\S\@<=___\|___\S\@=" keepend oneline
+syn region htmlBold start="\S\zs\*\*\|\*\*\S\@=" end="\S\zs\*\*\|\*\*\S\@=" keepend oneline
+syn region htmlBold start="\S\zs__\|__\S\@=" end="\S\zs__\|__\S\@=" keepend oneline
+syn region htmlBoldItalic start="\S\zs\*\*\*\|\*\*\*\S\@=" end="\S\zs\*\*\*\|\*\*\*\S\@=" keepend oneline
+syn region htmlBoldItalic start="\S\zs___\|___\S\@=" end="\S\zs___\|___\S\@=" keepend oneline
 
 " [link](URL) | [link][id] | [link][] | ![image](URL)
 syn region mkdFootnotes matchgroup=mkdDelimiter start="\[^"    end="\]"