https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71755
Bug ID: 71755
Summary: friend function may not be defined inside a class
using a qualified name but GCC allows that
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ww2www2w at gmail dot com
Target Milestone: ---
This code should not be compiled, but GCC compiles it successfully (btw vc++
and clang report an error).
#include <iostream>
using namespace std;
int ticket();
class Manager {
friend int ::ticket() { // qualified function name
return ++Manager::counter;
}
static int counter;
};
int Manager::counter;
int main() {
cout << ticket();
return 0;
}
g++ -std=c++14 -O2 -Wall -pedantic -pthread main.cpp && ./a.out
GCC should report an error because a friend function may not be defined inside
a class using a qualified name (it may only be declared). See 11.3.6 in
http://open-std.org/JTC1/SC22/WG21/docs/papers/2016/n4594.pdf (or any c++
standard edition since 2003)
