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Subject: [Bug c++/97453] Implement CWG issue 2303
Date: Tue, 03 Nov 2020 19:36:37 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97453

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jason Merrill <jason@gcc.gnu.org>:

https://gcc.gnu.org/g:ed7f9957bbb5e899099e1ef0e5f6234c453ef7da

commit r11-4693-ged7f9957bbb5e899099e1ef0e5f6234c453ef7da
Author: kamlesh kumar <kamleshbhalui@gmail.com>
Date:   Mon Nov 2 20:40:21 2020 +0530

    c++: DR2303, ambiguous base deduction [PR97453]

    When there are two possible matches and one is a base of the other, cho=
ose
    the derived class rather than fail.

    gcc/cp/ChangeLog

    2020-10-21  Kamlesh Kumar  <kamleshbhalui@gmail.com>
                Jason Merrill  <jason@redhat.com>

            PR c++/97453
            DR2303
            * pt.c (get_template_base): Consider closest base in template
            deduction when base of base also matches.

    gcc/testsuite/ChangeLog

    2020-10-21  Kamlesh Kumar  <kamleshbhalui@gmail.com>

            * g++.dg/DRs/dr2303.C: New test.=