C++ member function overloading with & (ampersand)

Question

How to pick the correct error() member function? Do I need to cast somehow?

using namespace std;  struct test {    int error();    void error(int x);    int fun(); };  int main() {    auto f1 = &test::error; // how to pick the correct function?    auto f2 = &test::fun; // works } 

Answer 1

You can just explicitly specify the member function pointer type.

int (test::*f1)() = &test::error; void (test::*f2)(int) = &test::error;