1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <memory> 11 12 // template <class T> 13 // struct pointer_traits<T*> 14 // { 15 // typedef ptrdiff_t difference_type; 16 // ... 17 // }; 18 19 #include <memory> 20 #include <type_traits> 21 22 int main() 23 { 24 static_assert((std::is_same<std::pointer_traits<double*>::difference_type, std::ptrdiff_t>::value), ""); 25 } 26