| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <memory> |
| |
| // Check that the following types are provided regardless of the Standard when |
| // we request them from libc++. |
| |
| // template <class T> |
| // class allocator |
| // { |
| // public: |
| // typedef size_t size_type; |
| // typedef ptrdiff_t difference_type; |
| // typedef T* pointer; |
| // typedef const T* const_pointer; |
| // typedef typename add_lvalue_reference<T>::type reference; |
| // typedef typename add_lvalue_reference<const T>::type const_reference; |
| // |
| // template <class U> struct rebind {typedef allocator<U> other;}; |
| // ... |
| // }; |
| |
| // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS |
| // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS |
| |
| #include <memory> |
| #include <type_traits> |
| #include <cstddef> |
| |
| template <class T> |
| void test() { |
| static_assert((std::is_same<typename std::allocator<T>::size_type, std::size_t>::value), ""); |
| static_assert((std::is_same<typename std::allocator<T>::difference_type, std::ptrdiff_t>::value), ""); |
| static_assert((std::is_same<typename std::allocator<T>::pointer, T*>::value), ""); |
| static_assert((std::is_same<typename std::allocator<T>::const_pointer, const T*>::value), ""); |
| static_assert((std::is_same<typename std::allocator<T>::reference, T&>::value), ""); |
| static_assert((std::is_same<typename std::allocator<T>::const_reference, const T&>::value), ""); |
| static_assert((std::is_same<typename std::allocator<T>::template rebind<int>::other, |
| std::allocator<int> >::value), ""); |
| } |
| |
| int main(int, char**) { |
| test<char>(); |
| return 0; |
| } |