[Bug c++/55136] New: template class member template explicit instanciation fails if non template overload exists

["frrrwww at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55136

             Bug #: 55136
           Summary: template class member template explicit instanciation
                    fails if non template overload exists
    Classification: Unclassified
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: frrrwww@gmail.com


this code:

template <typename T1>
struct A {
    void f(int) {}
    template<typename T2> void f(T2) {}
};
template void A<int>::f<int>(int);

fails with:

test2.cpp:6:15: error: ambiguous template specialization ‘f<int>’ for ‘void
A<int>::f(int)’
test2.cpp:3:10: error: candidates are: void A<T1>::f(int) [with T1 = int]
test2.cpp:4:32: error:                 template<class T2> void A::f(T2) [with
T2 = T2; T1 = int]

The instanciation should not be ambiguous as the '<int>' should exclude the non
template f.

Note that:

template <typename T1>
struct A {
    void f(int) {}
    template<typename T2> void f(T2) {}
};
template void A<int>::f(int);

fails as well, but I am not sufficiently standard savy to tell if this is
compliant behaviour.