Differential D47360 Diff 219818 test/std/utilities/utility/mem.res/mem.res.monotonic.buffer/mem.res.monotonic.buffer.mem/equality.pass.cpp

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				//===----------------------------------------------------------------------===//
				//
				// 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

				// <memory_resource>

				// class monotonic_buffer_resource

				#include <memory_resource>
				#include <new>
				#include <type_traits>
				#include <cassert>

				struct assert_on_compare : public std::pmr::memory_resource
				{
				protected:
				virtual void * do_allocate(size_t, size_t)
				{ assert(false); }

				virtual void do_deallocate(void *, size_t, size_t)
				{ assert(false); }

				virtual bool do_is_equal(std::pmr::memory_resource const &) const noexcept
				{ assert(false); }
				};

				int main()
				{
				// Same object
				{
				std::pmr::monotonic_buffer_resource r1;
				std::pmr::monotonic_buffer_resource r2;
				assert(r1 == r1);
				assert(r1 != r2);

				std::pmr::memory_resource & p1 = r1;
				std::pmr::memory_resource & p2 = r2;
				assert(p1 == p1);
				assert(p1 != p2);
				assert(p1 == r1);
				assert(r1 == p1);
				assert(p1 != r2);
				assert(r2 != p1);
				}
				// Different types
				{
				std::pmr::monotonic_buffer_resource mono1;
				std::pmr::memory_resource & r1 = mono1;
				assert_on_compare c;
				std::pmr::memory_resource & r2 = c;
				assert(r1 != r2);
				assert(!(r1 == r2));
				}
				}