std::experimental::source_location::function_name

#include <experimental/source_location>
#include <iostream>
#include <string_view>
 
inline void function_name(
 const std::string_view signature = "()",
 const std::experimental::source_location & location
 = std::experimental::source_location::current())
{
 std::cout
 << location.function_name() // <- name of the caller!
 << signature
 << '\n';
}
 
void foo() { function_name(); }
 
struct S {
 S() { function_name(); }
 S(int) { function_name("(int)"); }
 S& operator=(S const&) { function_name("(const S&)"); return *this; }
 S& operator=(S&&) { function_name("(S&&)"); return *this; }
 ~S() { function_name(); }
};
 
int main()
{
 foo();
 S p;
 S q{42};
 p = q;
 p = std::move(q);
}

foo()
S()
S(int)
operator=(const S&)
operator=(S&&)
~S()
~S()