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Question #233 Difficulty: 2

According to the C++17 standard, what is the output of this program?

    #include <type_traits>
#include <iostream>

using namespace std;

struct X {
    int f() const&&{
        return 0;
    }
};

int main() {
    auto ptr = &X::f;
    cout << is_same_v<decltype(ptr), int()>
         << is_same_v<decltype(ptr), int(X::*)()>;
}

Hint:

Can you overload two otherwise identical functions based on their ref qualifier alone?

Answer:

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