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| author | Ilya Zakharevich <ilya@math.berkeley.edu> | 1998-11-27 20:51:56 -0500 |
|---|---|---|
| committer | Gurusamy Sarathy <gsar@cpan.org> | 1998-11-28 19:30:06 +0000 |
| commit | 8f580fb8c3adcd8061f0e72f718bbf4ff930d697 (patch) | |
| tree | af6f381f84ea6a17ce41b3bd1f28f207fe375cba /pod | |
| parent | 5c5e4c245abefef949ee72dd179eff31d923dcb2 (diff) | |
| download | perl-8f580fb8c3adcd8061f0e72f718bbf4ff930d697.tar.gz | |
Change $#+
Message-Id: <199811280651.BAA18095@monk.mps.ohio-state.edu>
p4raw-id: //depot/perl@2373
Diffstat (limited to 'pod')
| -rw-r--r-- | pod/perlvar.pod | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/pod/perlvar.pod b/pod/perlvar.pod index 7100af5b75..8c6305ccad 100644 --- a/pod/perlvar.pod +++ b/pod/perlvar.pod @@ -189,13 +189,14 @@ This variable is read-only. $+[0] is the offset of the end of the last successfull match. C<$+[>I<n>C<]> is the offset of the end of the substring matched by -I<n>-th subpattern. +I<n>-th subpattern, or undef if the subpattern did not match. Thus after a match against $_, $& coincides with C<substr $_, $-[0], -$+[0]>. Similarly, C<$>I<n> coincides with C<substr $_, $-[>I<n>C<], -$+[>I<0>C<]> if C<$-[>I<n>C<]> is defined, and $+ conincides with -C<substr $_, $-[-1], $+[-1]>. One can use C<$#+> to find the last -matched subgroup in the last successful match. Compare with L<"@-">. +$+[0] - $-[0]>. Similarly, C<$>I<n> coincides with C<substr $_, $-[>I<n>C<], +$+[>I<n>C<] - $-[>I<n>C<]> if C<$-[>I<n>C<]> is defined, and $+ coincides with +C<substr $_, $-[$#-], $+[$#-]>. One can use C<$#+> to find the number +of subgroups in the last successful match. Note the difference with +C<$#->, which is the last I<matched> subgroup. Compare with L<"@-">. =item $MULTILINE_MATCHING @@ -410,13 +411,15 @@ channel. (Mnemonic: lines_on_page - lines_printed.) $-[0] is the offset of the start of the last successfull match. C<$-[>I<n>C<]> is the offset of the start of the substring matched by -I<n>-th subpattern. +I<n>-th subpattern, or undef if the subpattern did not match. Thus after a match against $_, $& coincides with C<substr $_, $-[0], -$+[0]>. Similarly, C<$>I<n> coincides with C<substr $_, $-[>I<n>C<], -$+[>I<0>C<]> if C<$-[>I<n>C<]> is defined, and $+ conincides with -C<substr $_, $-[-1], $+[-1]>. One can use C<$#-> to find the last -matched subgroup in the last successful match. Compare with L<"@+">. +$+[0] - $-[0]>. Similarly, C<$>I<n> coincides with C<substr $_, $-[>I<n>C<], +$+[>I<n>C<] - $-[>I<n>C<]> if C<$-[>I<n>C<]> is defined, and $+ coincides with +C<substr $_, $-[$#-], $+[$#-]>. One can use C<$#-> to find the last +matched subgroup in the last successful match. Note the difference with +C<$#+>, which is the number of subgroups in the regular expression. Compare +with L<"@+">. =item format_name HANDLE EXPR |