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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/102468] False acceptance of invalid `using
 Parent::Grandparent`
Date: Tue, 26 Oct 2021 07:57:33 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102468

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=3D62240,
                   |                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=3D11764,
                   |                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=3D56090

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is not a GCC bug but rather a bug in MSVC. Note both ICC and Clang acc=
ept
it.

Parent::Grandparent names the type, not the constructor.  This is unlike
name::name.

See DR 147 also:
http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#147

I think MSVC does not inject the base class name correctly.=