test/libcxx/experimental/memory/memory.polymorphic.allocator.class/memory.polymorphic.allocator.mem/db_deallocate.pass.cpp

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

// T* polymorphic_allocator<T>::deallocate(T*, size_t size)

int AssertCount = 0;

#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : (void)::AssertCount++)
#define _LIBCPP_DEBUG 0
#include <experimental/memory_resource>
#include <type_traits>
#include <cassert>

#include "test_memory_resource.hpp"

namespace ex = std::experimental::pmr;

int main()
{
    using Alloc = ex::polymorphic_allocator<int>;
    using Traits = std::allocator_traits<Alloc>;
    NullResource R;
    Alloc a(&R);
    const std::size_t maxSize = Traits::max_size(a);

    a.deallocate(nullptr, maxSize);
    assert(AssertCount == 0);
    a.deallocate(nullptr, maxSize + 1);
    assert(AssertCount == 1);
}