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// add_rvalue_reference
#include <iostream>
#include <type_traits>
int main() {
typedef std::add_rvalue_reference<int>::type A; // int&&
typedef std::add_rvalue_reference<int&>::type B; // int& (no change)
typedef std::add_rvalue_reference<int&&>::type C; // int&& (no change)
typedef std::add_rvalue_reference<int*>::type D; // int*&&
std::cout << std::boolalpha;
std::cout << "typedefs of int&&:" << std::endl;
std::cout << "A: " << std::is_same<int&&,A>::value << std::endl;
std::cout << "B: " << std::is_same<int&&,B>::value << std::endl;
std::cout << "C: " << std::is_same<int&&,C>::value << std::endl;
std::cout << "D: " << std::is_same<int&&,D>::value << std::endl;
return 0;
}
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