https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86180
Bug ID: 86180
Summary: Friend function definition not instantiated in certain
circumstances
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: zhonghao at pku dot org.cn
Target Milestone: ---
The following code compiles fine on clang++:
template<typename T>
struct provide {
friend T f() { return T(); }
};
void g() {
void f();
provide<void> p;
f();
}
int main() {
g();
}
However, gcc++ reports that it cannot find the definition of f.
Indeed, a previous version of clang++ cannot compile the above code either. It
was fixed in https://bugs.llvm.org/show_bug.cgi?id=9518
I believe that gcc++ shall also fix the bug, right?
