https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102257
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think this is the same bug, reduced from Bug 100667 comment 1 (where it
wasn't related):
struct allocator_arg_t { explicit allocator_arg_t() = default; };
class string{};
class Foo{};
struct tuple
{
template<typename Alloc>
tuple(allocator_arg_t, const Alloc&) { }
template<typename = void>
tuple(const string&, const Foo&) { }
};
tuple bar()
{
return { {}, Foo{}};
}
Clang and EDG accept this.
