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Diffstat (limited to 'Porting/perl5160delta.pod')
| -rw-r--r-- | Porting/perl5160delta.pod | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/Porting/perl5160delta.pod b/Porting/perl5160delta.pod index e55b6dfa30..a117886643 100644 --- a/Porting/perl5160delta.pod +++ b/Porting/perl5160delta.pod @@ -895,6 +895,23 @@ itself. C<substr> no longer calculates a value to return when called in void context. +=item Literal C<"{"> characters in regular expression patterns + +It is planned starting in v5.20 to require a literal C<"{"> to be +escaped by, for example, preceding it with a backslash. In v5.18, a +deprecated warning message will be emitted for all such uses. Note that +this only affects patterns which are to match a literal C<"{">. Other +uses of this character, such as part of a quantifier or sequence like in +the ones below are completely unaffected: + + /foo{3,5}/ + /\p{Alphabetic}/ + /\N{DIGIT ZERO} + +The removal of this will allow extensions to pattern syntax, and better +error checking of existing syntax. See L<perlre/Quantifiers> for an +example. + =back =over 4 |