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 Ptr> 13 // struct pointer_traits 14 // { 15 // typedef <details> element_type; 16 // ... 17 // }; 18 19 #include <memory> 20 #include <type_traits> 21 22 struct A 23 { 24 typedef char element_type; 25 }; 26 27 template <class T> 28 struct B 29 { 30 typedef char element_type; 31 }; 32 33 template <class T> 34 struct C 35 { 36 }; 37 38 template <class T, class U> 39 struct D 40 { 41 }; 42 43 int main() 44 { 45 static_assert((std::is_same<std::pointer_traits<A>::element_type, char>::value), ""); 46 static_assert((std::is_same<std::pointer_traits<B<int> >::element_type, char>::value), ""); 47 static_assert((std::is_same<std::pointer_traits<C<int> >::element_type, int>::value), ""); 48 static_assert((std::is_same<std::pointer_traits<D<double, int> >::element_type, double>::value), ""); 49 } 50
