test/libcxx/depr/depr.default.allocator/allocator.members/max_size.cxx2a.pass.cpp

//===----------------------------------------------------------------------===//
//
// 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>

// allocator:
// size_type max_size() const throw();

//  In C++20, parts of std::allocator<T> have been removed.
//  However, for backwards compatibility, if _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS
//  is defined before including <memory>, then removed members will be restored.

// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS
// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS

#include <memory>
#include <limits>
#include <cstddef>
#include <cassert>

#include "test_macros.h"

int new_called = 0;

int main(int, char**)
{
    const std::allocator<int> a;
    std::size_t M = a.max_size();
    assert(M > 0xFFFF && M <= (std::numeric_limits<std::size_t>::max() / sizeof(int)));

  return 0;
}