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::void_pointer 16 // | pointer_traits<pointer>::rebind<void> 17 // void_pointer; 18 // ... 19 // }; 20 21 #include <memory> 22 #include <type_traits> 23 #include "test_macros.h" 24 25 template <class T> 26 struct Ptr {}; 27 28 template <class T> 29 struct A 30 { 31 typedef T value_type; 32 typedef Ptr<T> pointer; 33 }; 34 35 template <class T> 36 struct B 37 { 38 typedef T value_type; 39 }; 40 41 template <class T> 42 struct CPtr {}; 43 44 template <class T> 45 struct C 46 { 47 typedef T value_type; 48 typedef CPtr<void> void_pointer; 49 }; 50 51 52 template <class T> 53 struct D 54 { 55 typedef T value_type; 56 private: 57 typedef void void_pointer; 58 }; 59 60 int main() 61 { 62 static_assert((std::is_same<std::allocator_traits<A<char> >::void_pointer, Ptr<void> >::value), ""); 63 static_assert((std::is_same<std::allocator_traits<B<char> >::void_pointer, void*>::value), ""); 64 static_assert((std::is_same<std::allocator_traits<C<char> >::void_pointer, CPtr<void> >::value), ""); 65 #if TEST_STD_VER >= 11 66 static_assert((std::is_same<std::allocator_traits<D<char> >::void_pointer, void*>::value), ""); 67 #endif 68 } 69
