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 #include "test_macros.h" 23 24 template <class T> 25 struct Ptr {}; 26 27 template <class T> 28 struct A 29 { 30 typedef T value_type; 31 typedef Ptr<T> pointer; 32 }; 33 34 template <class T> 35 struct B 36 { 37 typedef T value_type; 38 }; 39 40 template <class T> 41 struct C { 42 typedef T value_type; 43 private: 44 typedef void pointer; 45 }; 46 47 int main() 48 { 49 static_assert((std::is_same<std::allocator_traits<A<char> >::pointer, Ptr<char> >::value), ""); 50 static_assert((std::is_same<std::allocator_traits<B<char> >::pointer, char*>::value), ""); 51 #if TEST_STD_VER >= 11 52 static_assert((std::is_same<std::allocator_traits<C<char> >::pointer, char*>::value), ""); 53 #endif 54 } 55
