[Bug c++/92752] [9/10/11/12 Regression] Bogus "ignored qualifiers" warning on const-qualified pointer-to-member-function objects

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92752

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Patrick Palka <ppa...@gcc.gnu.org>:

https://gcc.gnu.org/g:e971990cbda091b4caf5e1a5bded5121068934e4

commit r12-6926-ge971990cbda091b4caf5e1a5bded5121068934e4
Author: Patrick Palka <ppa...@redhat.com>
Date:   Fri Jan 28 15:41:15 2022 -0500

    c++: bogus warning with value init of const pmf [PR92752]

    Here we're emitting a -Wignored-qualifiers warning for an intermediate
    compiler-generated cast of nullptr to 'method-type* const' as part of
    value initialization of a const pmf.  This patch suppresses the warning
    by instead casting to the corresponding unqualified type.

            PR c++/92752

    gcc/cp/ChangeLog:

            * typeck.cc (build_ptrmemfunc): Cast a nullptr constant to the
            unqualified pointer type not the qualified one.

    gcc/testsuite/ChangeLog:

            * g++.dg/warn/Wignored-qualifiers2.C: New test.

    Co-authored-by: Jason Merrill <ja...@redhat.com>