diff options
Diffstat (limited to 'pod/perlre.pod')
| -rw-r--r-- | pod/perlre.pod | 28 |
1 files changed, 17 insertions, 11 deletions
diff --git a/pod/perlre.pod b/pod/perlre.pod index aa861ae46e..99cba6889e 100644 --- a/pod/perlre.pod +++ b/pod/perlre.pod @@ -27,15 +27,6 @@ L<perlop/"Gory details of parsing quoted constructs">. =over 4 -=item i -X</i> X<regex, case-insensitive> X<regexp, case-insensitive> -X<regular expression, case-insensitive> - -Do case-insensitive pattern matching. - -If C<use locale> is in effect, the case map is taken from the current -locale. See L<perllocale>. - =item m X</m> X<regex, multiline> X<regexp, multiline> X<regular expression, multiline> @@ -54,11 +45,26 @@ Used together, as /ms, they let the "." match any character whatsoever, while still allowing "^" and "$" to match, respectively, just after and just before newlines within the string. +=item i +X</i> X<regex, case-insensitive> X<regexp, case-insensitive> +X<regular expression, case-insensitive> + +Do case-insensitive pattern matching. + +If C<use locale> is in effect, the case map is taken from the current +locale. See L<perllocale>. + =item x X</x> Extend your pattern's legibility by permitting whitespace and comments. +=item p +X</p> X<regex, preserve> X<regexp, preserve> + +Preserve the string matched such that ${^PREMATCH}, {$^MATCH}, and +${^POSTMATCH} are available for use after matching. + =back These are usually written as "the C</x> modifier", even though the delimiter @@ -593,11 +599,11 @@ X<$&> X<$`> X<$'> As a workaround for this problem, Perl 5.10 introduces C<${^PREMATCH}>, C<${^MATCH}> and C<${^POSTMATCH}>, which are equivalent to C<$`>, C<$&> and C<$'>, B<except> that they are only guaranteed to be defined after a -successful match that was executed with the C</k> (keep-copy) modifier. +successful match that was executed with the C</p> (preserve) modifier. The use of these variables incurs no global performance penalty, unlike their punctuation char equivalents, however at the trade-off that you have to tell perl when you want to use them. -X</k> X<k modifier> +X</p> X<p modifier> Backslashed metacharacters in Perl are alphanumeric, such as C<\b>, C<\w>, C<\n>. Unlike some other regular expression languages, there |