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Subject: [Bug libstdc++/94562] C++20: std::shared_ptr<int>{} <=> nullptr
 ill-formed
Date: Tue, 14 Apr 2020 20:55:09 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94562

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

https://gcc.gnu.org/g:f5fa62ed19a1c85cda920bbe05eb075d8f2a0b42

commit r10-7725-gf5fa62ed19a1c85cda920bbe05eb075d8f2a0b42
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Tue Apr 14 21:54:55 2020 +0100

    libstdc++: Add comparison operators to std::shared_ptr (PR 94562)

    This also implements the proposed resolution to LWG issue 3247, so that
    the ill-formed <=3D> expression with nullptr is not used.

            PR libstdc++/94562
            * include/bits/shared_ptr.h (operator<=3D>): Define for C++20.
            * include/bits/shared_ptr_base.h (operator<=3D>): Likewise.
            * include/bits/unique_ptr.h (operator<=3D>): Add inline specifi=
er.
            * testsuite/20_util/shared_ptr/comparison/cmp_c++20.cc: New tes=
t.
            * testsuite/20_util/shared_ptr/comparison/less.cc: Do not expect
            std::less<A*> to be used when comparing std::shared_ptr<A> obje=
cts
in
            C++20.=