(C++11) The predefined identifier __func__ is implicitly defined as a string that contains the unqualified and unadorned name of the enclosing function. __func__ is mandated by the C++ standard and is not a Microsoft extension.

__func__

Returns a null-terminated const char array of characters that contains the function name.

#include <string>
#include <iostream>

namespace Test
{
    struct Foo
    {
        static void DoSomething(int i, std::string s)
        {
           std::cout << __func__ << std::endl; // Output: DoSomething
        }
    };
}

int main()
{
    Test::Foo::DoSomething(42, "Hello");

    return 0;
}

C++11