diff options
Diffstat (limited to 'pod/perlop.pod')
| -rw-r--r-- | pod/perlop.pod | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/pod/perlop.pod b/pod/perlop.pod index 538745dd6a..cae38ebf55 100644 --- a/pod/perlop.pod +++ b/pod/perlop.pod @@ -601,11 +601,16 @@ a transliteration, the first ten of these sequences may be used. \L lowercase till \E \U uppercase till \E \E end case modification - \Q quote regexp metacharacters till \E + \Q quote non-word characters till \E If C<use locale> is in effect, the case map used by C<\l>, C<\L>, C<\u> and C<\U> is taken from the current locale. See L<perllocale>. +You cannot include a literal C<$> or C<@> within a C<\Q> sequence. +An unescaped C<$> or C<@> interpolates the corresponding variable, +while escaping will cause the literal string C<\$> to be inserted. +You'll need to write something like C<m/\Quser\E\@\Qhost/>. + Patterns are subject to an additional level of interpretation as a regular expression. This is done as a second pass, after variables are interpolated, so that regular expressions may be incorporated into the @@ -681,9 +686,9 @@ successfully matched regular expression is used instead. If used in a context that requires a list value, a pattern match returns a list consisting of the subexpressions matched by the parentheses in the pattern, i.e., (C<$1>, $2, $3...). (Note that here $1 etc. are also set, and -that this differs from Perl 4's behavior.) If the match fails, a null -array is returned. If the match succeeds, but there were no parentheses, -a list value of (1) is returned. +that this differs from Perl 4's behavior.) If there are no parentheses, +the return value is the list C<(1)> for success or C<('')> upon failure. +With parentheses, C<()> is returned upon failure. Examples: |