| //===----------------------------------------------------------------------===// |
| // |
| // 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 size_type max_size(const allocator_type& a) noexcept; |
| // ... |
| // }; |
| |
| #include <memory> |
| #include <new> |
| #include <type_traits> |
| #include <cassert> |
| |
| template <class T> |
| struct A |
| { |
| typedef T value_type; |
| |
| }; |
| |
| template <class T> |
| struct B |
| { |
| typedef T value_type; |
| |
| size_t max_size() const |
| { |
| return 100; |
| } |
| }; |
| |
| int main() |
| { |
| #ifndef _LIBCPP_HAS_NO_ADVANCED_SFINAE |
| { |
| A<int> a; |
| assert(std::allocator_traits<A<int> >::max_size(a) == |
| std::numeric_limits<std::size_t>::max() / sizeof(int)); |
| } |
| { |
| const A<int> a = {}; |
| assert(std::allocator_traits<A<int> >::max_size(a) == |
| std::numeric_limits<std::size_t>::max() / sizeof(int)); |
| } |
| #endif // _LIBCPP_HAS_NO_ADVANCED_SFINAE |
| { |
| B<int> b; |
| assert(std::allocator_traits<B<int> >::max_size(b) == 100); |
| } |
| { |
| const B<int> b = {}; |
| assert(std::allocator_traits<B<int> >::max_size(b) == 100); |
| } |
| #if __cplusplus >= 201103 |
| { |
| std::allocator<int> a; |
| static_assert(noexcept(std::allocator_traits<std::allocator<int>>::max_size(a)) == true, ""); |
| } |
| #endif |
| } |