diff options
Diffstat (limited to 'pod/perlre.pod')
| -rw-r--r-- | pod/perlre.pod | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/pod/perlre.pod b/pod/perlre.pod index 09bee37161..e1f30a324a 100644 --- a/pod/perlre.pod +++ b/pod/perlre.pod @@ -662,7 +662,8 @@ which uses C<< (?>...) >> matches exactly when the one above does (verifying this yourself would be a productive exercise), but finishes in a fourth the time when used on a similar string with 1000000 C<a>s. Be aware, however, that this pattern currently triggers a warning message under -B<-w> saying it C<"matches the null string many times">): +the C<use warnings> pragma or B<-w> switch saying it +C<"matches the null string many times">): On simple groups, such as the pattern C<< (?> [^()]+ ) >>, a comparable effect may be achieved by negative look-ahead, as in C<[^()]+ (?! [^()] )>. |