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| // add_const example #include <iostream> #include <type_traits> int main() { typedef std::add_const<int>::type A; // const int typedef std::add_const<const int>::type B; // const int (unchanged) typedef std::add_const<const int*>::type C; // const int* const typedef std::add_const<int* const>::type D; // int* const (unchanged) typedef std::add_const<const int&>::type E; // const int& (unchanged) std::cout << std::boolalpha; std::cout << "checking constness:" << std::endl; std::cout << "A: " << std::is_const<A>::value << std::endl; std::cout << "B: " << std::is_const<B>::value << std::endl; std::cout << "C: " << std::is_const<C>::value << std::endl; std::cout << "D: " << std::is_const<D>::value << std::endl; std::cout << "E: " << std::is_const<E>::value << std::endl; return 0; }
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