This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 114a. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
2024-04-28
Consider:
void f() noexcept {}
void g(void (*)() noexcept) {}
void g(void (&)()) {}
int main() {
g(f); // error: ambiguous
}
In contrast:
void f() noexcept {} void g(void (*)()) {} void g(void (&)()) {} // #1 int main() { g(f); // OK, calls #1 }
In both cases, binding void(&)() to void() noexcept is considered an identity conversion, without further disambiguation by 12.2.4.3 [over.ics.rank].