| //===----------------------------------------------------------------------===// |
| // |
| // 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. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++98, c++03 |
| |
| // <experimental/memory_resource> |
| |
| // template <class T> class polymorphic_allocator |
| |
| // template <class U1, class U2> |
| // void polymorphic_allocator<T>::construct(pair<U1, U2>*) |
| |
| #include <experimental/memory_resource> |
| #include <type_traits> |
| #include <utility> |
| #include <tuple> |
| #include <cassert> |
| #include <cstdlib> |
| #include "uses_alloc_types.hpp" |
| |
| namespace ex = std::experimental::pmr; |
| |
| int constructed = 0; |
| |
| struct default_constructible |
| { |
| default_constructible() : x(42) { ++constructed; } |
| int x{0}; |
| }; |
| |
| int main() |
| { |
| // pair<default_constructible, default_constructible> as T() |
| { |
| typedef default_constructible T; |
| typedef std::pair<T, T> P; |
| typedef ex::polymorphic_allocator<void> A; |
| P * ptr = (P*)std::malloc(sizeof(P)); |
| A a; |
| a.construct(ptr); |
| assert(constructed == 2); |
| assert(ptr->first.x == 42); |
| assert(ptr->second.x == 42); |
| std::free(ptr); |
| } |
| } |