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PR c++/89381 - implicit copy and using-declaration.

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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.

From-SVN: r269442
This commit is contained in:
Jason Merrill 2019-03-06 15:28:47 -05:00 committed by Jason Merrill
parent 71b6cb2bbc
commit 2de5d0ea90
3 changed files with 46 additions and 1 deletions
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6
gcc/cp/ChangeLog
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@ -1,3 +1,9 @@
2019-03-06 Jason Merrill <jason@redhat.com>
PR c++/89381 - implicit copy and using-declaration.
* class.c (classtype_has_move_assign_or_move_ctor_p): Don't consider
op= brought in by a using-declaration.
2019-03-06 Jakub Jelinek <jakub@redhat.com>
PR c++/87148

4
gcc/cp/class.c
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@ -5220,7 +5220,9 @@ classtype_has_move_assign_or_move_ctor_p (tree t, bool user_p)
for (ovl_iterator iter (get_class_binding_direct
(t, assign_op_identifier));
iter; ++iter)
if ((!user_p || !DECL_ARTIFICIAL (*iter)) && move_fn_p (*iter))
if ((!user_p || !DECL_ARTIFICIAL (*iter))
&& DECL_CONTEXT (*iter) == t
&& move_fn_p (*iter))
return true;
return false;

37
gcc/testsuite/g++.dg/cpp0x/implicit16.C Normal file
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@ -0,0 +1,37 @@
// PR c++/89381
// { dg-do compile { target c++11 } }
template<typename T>
struct base
{
base() { }
base(const base&) { }
base(base&&) { }
base& operator=(const base&) { return *this; }
base& operator=(base&&) { return *this; }
};
struct foo : base<int>
{
using base<int>::base;
using base<int>::operator=;
};
//using workaround = decltype(foo{*static_cast<foo const*>(0)});
struct bar
{
bar& operator=(foo ve)
{
value = ve;
return *this;
}
foo value;
};
int main()
{
foo a;
foo b{a};
}