https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78308
Bug ID: 78308
Summary: Hiding of member function templates introduced by
using-decl
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: g...@axel-naumann.de
Target Milestone: ---
Hi,
struct A {
template <class T> auto func(T t) -> decltype(T::member);
};
struct B: A {
using A::func;
template <class T> auto func(T t) -> decltype(T::other);
};
struct P { int member; };
void call(B b, P p) {
b.func(p);
}
GCC accepts this; ICC and clang reject this, refusing to introduce A::func in
B. See also [namespace.udecl](15):
"When a using-declaration brings declarations from a base class into a
derived class, member functions and
member function templates in the derived class override and/or hide
member functions and member function
templates with the same name, parameter-type-list (8.3.5),
cv-qualification, and ref-qualifier (if any) in a
base class (rather than conflicting). Such hidden or overridden
declarations are excluded from the set of
declarations introduced by the using-declaration."
Cheers, Axel.
