Branch: refs/heads/blead
Home: https://github.com/Perl/perl5
Commit: 5f5c35d3ce139755d02fa07de26229cd08d3c8cd
https://github.com/Perl/perl5/commit/5f5c35d3ce139755d02fa07de26229cd08d3c8cd
Author: Yves Orton <demer...@gmail.com>
Date: 2023-02-08 (Wed, 08 Feb 2023)
Changed paths:
M pod/perl5378delta.pod
M pod/perldelta.pod
M pod/perlre.pod
M regcomp.c
M regexec.c
M t/re/pat_re_eval.t
M toke.c
Log Message:
-----------
regcomp.c - remove (**{ ... }) from the regex engine
Dave M pointed out that this idea was flawed, and after some testing I have
come to agree with him. This removes it. It was only available for 5.37.8,
so no deprecation cycle involved.
The point of (**{ ... }) was to have a postponed eval that does not disable
optimizations. But some of the optimizations are disabled because if they
are not we do not match correctly as the optimizations will make unwarranted
assumptions about the pattern, assumptions which can be incorrect depending
on what pattern is returned from the codeblock. The original idea was
proposed because (?{ ... }) was treated as though it was (??{ ... }) and
disabled many optimizations, when in fact it doesn't interact with
optimizations at all. When I added (*{ ... }) as the optimistic version of
(?{ ... }) I used "completeness" as the justification for also adding
(**{ ... }) when it does not make sense to do so.
