[Bug c++/89381] [7/8/9 Regression] Implicit copy constructor cannot be generated after unrelated class definition

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89381

--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Mar  6 20:28:47 2019
New Revision: 269442

URL: https://gcc.gnu.org/viewcvs?rev=269442&root=gcc&view=rev
Log:
        PR c++/89381 - implicit copy and using-declaration.

Here the used base<int>::operator= gets into the list of foo's bindings for
operator=, but it shouldn't make the copy ctor deleted.

        * class.c (classtype_has_move_assign_or_move_ctor_p): Don't consider
        op= brought in by a using-declaration.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/implicit16.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/class.c