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Diffstat (limited to 'pod/perlreguts.pod')
| -rw-r--r-- | pod/perlreguts.pod | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/pod/perlreguts.pod b/pod/perlreguts.pod index 204993165c..9c54ec4aac 100644 --- a/pod/perlreguts.pod +++ b/pod/perlreguts.pod @@ -810,13 +810,12 @@ value to other engine implementations. =item C<swap> -C<swap> is an extra set of startp/endp stored in a C<regexp_paren_ofs> -struct. This is used when the last successful match was from the same pattern -as the current pattern, so that a partial match doesn't overwrite the -previous match's results. When this field is data filled the matching -engine will swap buffers before every match attempt. If the match fails, -then it swaps them back. If it's successful it leaves them. This field -is populated on demand and is by default null. +C<swap> formerly was an extra set of startp/endp stored in a +C<regexp_paren_ofs> struct. This was used when the last successful match +was from the same pattern as the current pattern, so that a partial +match didn't overwrite the previous match's results, but it caused a +problem with re-entrant code such as trying to build the UTF-8 swashes. +Currently unused and left for backward compatibility with 5.10.0. =item C<offsets> |