https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111129
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |timshen at gcc dot gnu.org
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This changed with r0-127716-g053eb1f31ede72
* include/bits/regex_compiler.h (_Comipler<>::_M_quantifier()):
Fix parse error of multiple consecutive quantifiers like "a**".
* include/bits/regex_compiler.tcc (_Comipler<>::_M_quantifier()):
Likewise.
* testsuite/28_regex/basic_regex/multiple_quantifiers.cc: New.
That added the following tests:
regex re1("a++");
regex re2("(a+)+");
The second one is fine, but the first is invalid. The "a**" case mentioned in
the commit message is invalid too.
I don't know why Tim wanted to accept the first one. ECMAscript and POSIX don't
accept it. My GNU grep does, but I think that's just a bug in glibc's regcomp:
https://sourceware.org/bugzilla/show_bug.cgi?id=20095
