| //===----------------------------------------------------------------------===// |
| // |
| // 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. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // REQUIRES: c++experimental |
| // UNSUPPORTED: c++98, c++03 |
| |
| // <experimental/memory_resource> |
| |
| // template <class T> class polymorphic_allocator |
| |
| // polymorphic_allocator<T>::polymorphic_allocator() noexcept |
| |
| #include <experimental/memory_resource> |
| #include <type_traits> |
| #include <cassert> |
| |
| #include "test_memory_resource.hpp" |
| |
| namespace ex = std::experimental::pmr; |
| |
| int main() |
| { |
| { |
| static_assert( |
| std::is_nothrow_default_constructible<ex::polymorphic_allocator<void>>::value |
| , "Must me nothrow default constructible" |
| ); |
| } |
| { |
| // test that the allocator gets its resource from get_default_resource |
| TestResource R1(42); |
| ex::set_default_resource(&R1); |
| |
| typedef ex::polymorphic_allocator<void> A; |
| A const a; |
| assert(a.resource() == &R1); |
| |
| ex::set_default_resource(nullptr); |
| A const a2; |
| assert(a.resource() == &R1); |
| assert(a2.resource() == ex::new_delete_resource()); |
| } |
| } |