diff options
| author | Russ Cox <rsc@swtch.com> | 2010-07-15 20:38:05 -0700 |
|---|---|---|
| committer | Russ Cox <rsc@swtch.com> | 2010-07-15 20:38:05 -0700 |
| commit | 4a9f4ca78a66843709737519472becb28c20e20c (patch) | |
| tree | 3400cc04094db3b906d65f4d7e1c89e7148c1420 /re2/mimics_pcre.cc | |
| parent | 4c213792cf4aa033242d3eb01841c4ba0bd805d7 (diff) | |
| download | regex-re2-4a9f4ca78a66843709737519472becb28c20e20c.tar.gz | |
factor common prefixes from alternations
Juggle code so that RE2::Set can benefit too.
R=rsc
CC=re2-dev
http://codereview.appspot.com/1740045
Diffstat (limited to 're2/mimics_pcre.cc')
| -rw-r--r-- | re2/mimics_pcre.cc | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/re2/mimics_pcre.cc b/re2/mimics_pcre.cc index c570168..fc6dd4a 100644 --- a/re2/mimics_pcre.cc +++ b/re2/mimics_pcre.cc @@ -151,6 +151,7 @@ bool EmptyStringWalker::PostVisit(Regexp* re, bool parent_arg, bool pre_arg, case kRegexpEndText: case kRegexpStar: // can always be empty case kRegexpQuest: + case kRegexpHaveMatch: return true; case kRegexpConcat: // can be empty if all children can |