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// template <class Ptr> 16// static void destroy(allocator_type& a, Ptr p); 17// ... 18// }; 19 20#include <memory> 21#include <new> 22#include <type_traits> 23#include <cassert> 24 25template <class T> 26struct A 27{ 28 typedef T value_type; 29 30}; 31 32int b_destroy = 0; 33 34template <class T> 35struct B 36{ 37 typedef T value_type; 38 39 template <class U> 40 void destroy(U* p) 41 { 42 ++b_destroy; 43 p->~U(); 44 } 45}; 46 47struct A0 48{ 49 static int count; 50 ~A0() {++count;} 51}; 52 53int A0::count = 0; 54 55int main() 56{ 57 { 58 A0::count = 0; 59 A<int> a; 60 std::aligned_storage<sizeof(A0)>::type a0; 61 std::allocator_traits<A<int> >::construct(a, (A0*)&a0); 62 assert(A0::count == 0); 63 std::allocator_traits<A<int> >::destroy(a, (A0*)&a0); 64 assert(A0::count == 1); 65 } 66#ifndef _LIBCPP_HAS_NO_ADVANCED_SFINAE 67 { 68 A0::count = 0; 69 b_destroy = 0; 70 B<int> b; 71 std::aligned_storage<sizeof(A0)>::type a0; 72 std::allocator_traits<B<int> >::construct(b, (A0*)&a0); 73 assert(A0::count == 0); 74 assert(b_destroy == 0); 75 std::allocator_traits<B<int> >::destroy(b, (A0*)&a0); 76 assert(A0::count == 1); 77 assert(b_destroy == 1); 78 } 79#endif // _LIBCPP_HAS_NO_ADVANCED_SFINAE 80} 81