I misread the email thread and thought there was consensus
for the \d change, but there was wasn’t so revert the change.
Also, document the resulting confusion
somewhat better than it was documented before.
* src/pcresearch.c, tests/pcre-ascii-digits, tests-pcre-utf8-w:
Revert recent \d change, restoring the behavior to that of grep 3.11.
Treating \d differently from Perl was more trouble than it was worth.
* NEWS, doc/grep.texi (grep Programs): Document this.
* src/pcresearch.c (PCRE2_EXTRA_ASCII_BSD):
Remove. All uses removed.
* tests/pcre-ascii-digits: Adjust to this change.
* tests/pcre-utf8-w: Revert to 3.9.
Our prepass-based fixes for the -P \d bug have caused repeated
further bugs. Avoid the need for a prepass, by using PCRE2_UCP
only if PCRE2_EXTRA_ASCII_BSD is also supported. Since the -P \w
bug was present from grep 2.5 through 3.8 it’s OK if we wait a
little longer to fix it.
* NEWS: Mention this.
* src/pcresearch.c (pcre_pattern_expand_backslash_d}: Remove.
Remove its use.
(Pcompile): Use PCRE2_UCP only if PCRE2_EXTRA_ASCII_BSD.
* tests/pcre-ascii-digits, tests/pcre-utf8-w:
Skip tests on older PCRE2 implementations.
Before this change, if linked with a PCRE library without unicode
any invocations of grep when using a UTF locale will error with:
grep: this version of PCRE2 does not have Unicode support
* src/pcresearch.c: Check whether Unicode was compiled in.
* tests/pcre-utf8-w: Add check to skip test.
* tests/pcre-utf8: Update check.
This fixes a serious bug affecting word-boundary and word-constituent regular
expressions when the desired match involves non-ASCII UTF8 characters.
* src/pcresearch.c: Set PCRE2_UCP together with PCRE2_UTF
* tests/pcre-utf8-w: New file.
* tests/Makefile.am (TESTS): Add it.
* NEWS (Bug fixes): Mention this.
* THANKS.in: Add Gro-Tsen and Karl Petterson.
Reported by Gro-Tsen https://twitter.com/gro_tsen/status/1610972356972875777
via Karl Pettersson in https://github.com/PCRE2Project/pcre2/issues/185
This bug was present from grep-2.5, when --perl-regexp (-P) support was added.
