Branch: refs/heads/davem/re_debug
Home: https://github.com/Perl/perl5
Commit: 407267be97c83fd72b334a0953ab6142a27de01f
https://github.com/Perl/perl5/commit/407267be97c83fd72b334a0953ab6142a27de01f
Author: David Mitchell <[email protected]>
Date: 2025-12-02 (Tue, 02 Dec 2025)
Changed paths:
M regcomp.sym
M regexec.c
M regnodes.h
Log Message:
-----------
regex engine: split EVAL_postponed_AB state
(This commit makes no practical changes in behaviour except for
debugging output.)
Currently, one of the regex engine stack states is EVAL_postponed_AB.
When executing something like /(??{'A'})B/ where A and B represent
general subpatterns, the engine executes the eval code, which returns
the string 'A', which is compiled into a subpattern. Then the engine
pushes an EVAL_postponed_AB state and runs the subpattern until it
reaches an END op. Then it pushes *another* EVAL_postponed_AB state and
runs the B part of the pattern until the final END. Then before
returning success, it pops EVAL_postponed_AB off the stack (twice),
executing any cleanup required. Similarly during failure, the
EVAL_postponed_AB_fail action will be executed once or twice (depending
on whether it failed during A or B).
This commit splits that state into two,
EVAL_postponed_A
EVAL_postponed_B
The first is pushed before running A, the second before running B.
The actions currently remain the same and share the same code; i.e. this
commit just does the equivalent of:
- case EVAL_postponed_AB:
+ case EVAL_postponed_A:
+ case EVAL_postponed_B:
... cleanup code ....
But it makes the code easier to understand, makes debugging output
clearer, and will allow in future for the cleanup behaviours to differ
between A and B.
This commit also fixes up a few debugging messages and code comments
which were still referring to 'EVAL_AB', which was renamed to
EVAL_postponed_AB some years ago.
Commit: 5e0ff3da62d49aca7f4ad15653d602630d049c87
https://github.com/Perl/perl5/commit/5e0ff3da62d49aca7f4ad15653d602630d049c87
Author: David Mitchell <[email protected]>
Date: 2025-12-02 (Tue, 02 Dec 2025)
Changed paths:
Log Message:
-----------
Merge branch 'blead' into davem/re_debug
Compare: https://github.com/Perl/perl5/compare/6dee5e6b86cb...5e0ff3da62d4
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