| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <memory> |
| |
| // template <class Alloc> |
| // struct allocator_traits |
| // { |
| // static pointer allocate(allocator_type& a, size_type n, const_void_pointer hint); |
| // ... |
| // }; |
| |
| #include <memory> |
| #include <cassert> |
| |
| template <class T> |
| struct A |
| { |
| typedef T value_type; |
| |
| value_type* allocate(std::size_t n) |
| { |
| assert(n == 10); |
| return (value_type*)0xDEADBEEF; |
| } |
| }; |
| |
| template <class T> |
| struct B |
| { |
| typedef T value_type; |
| |
| value_type* allocate(std::size_t n) |
| { |
| assert(n == 12); |
| return (value_type*)0xEEADBEEF; |
| } |
| value_type* allocate(std::size_t n, const void* p) |
| { |
| assert(n == 11); |
| assert(p == 0); |
| return (value_type*)0xFEADBEEF; |
| } |
| }; |
| |
| int main() |
| { |
| #ifndef _LIBCPP_HAS_NO_ADVANCED_SFINAE |
| A<int> a; |
| assert(std::allocator_traits<A<int> >::allocate(a, 10, nullptr) == (int*)0xDEADBEEF); |
| #endif // _LIBCPP_HAS_NO_ADVANCED_SFINAE |
| B<int> b; |
| assert(std::allocator_traits<B<int> >::allocate(b, 11, nullptr) == (int*)0xFEADBEEF); |
| } |