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 Alloc> 13 // struct allocator_traits 14 // { 15 // typedef Alloc::pointer | value_type* pointer; 16 // ... 17 // }; 18 19 #include <memory> 20 #include <type_traits> 21 22 template <class T> 23 struct Ptr {}; 24 25 template <class T> 26 struct A 27 { 28 typedef T value_type; 29 typedef Ptr<T> pointer; 30 }; 31 32 template <class T> 33 struct B 34 { 35 typedef T value_type; 36 }; 37 38 int main() 39 { 40 static_assert((std::is_same<std::allocator_traits<A<char> >::pointer, Ptr<char> >::value), ""); 41 static_assert((std::is_same<std::allocator_traits<B<char> >::pointer, char*>::value), ""); 42 } 43
