https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94799
Bug ID: 94799
Summary: [7.2+ Regression] Calling a member template function
fails
Product: gcc
Version: 9.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ojman101 at protonmail dot com
Target Milestone: ---
>From gcc version 7.2 and upwards this c++ code, using a member template
function look-up, fails to compile:
template <typename T>
struct A {
int a() {
return 42;
}
};
template <typename T>
struct B {
int b(A<T> *p) {
return p->template A<T>::a();
}
};
int main() {
A<int> a;
B<int> b;
return b.b(&a);
}
On gcc version 9.3.0 (Gentoo 9.3.0 p2), this output is generated:
main.cc: In member function 'int B<T>::b(A<T>*)':
main.cc:11:32: error: expected ';' before '::' token
11 | return p->template A<T>::a();
| ^~
| ;
main.cc:11:34: error: '::a' has not been declared
11 | return p->template A<T>::a();
| ^
main.cc: In instantiation of 'int B<T>::b(A<T>*) [with T = int]':
main.cc:18:18: required from here
main.cc:11:28: error: 'A' is not a member template function
11 | return p->template A<T>::a();
| ~~~~~~~~~~~~^~~~
This code successfully compiles on new versions of clang, icc and msvc as well
as gcc versions before 7.2.
