test/std/containers/sequences/forwardlist/max_size.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
//
//===----------------------------------------------------------------------===//

// <forward_list>

// size_type max_size() const;

#include <cassert>
#include <forward_list>
#include <limits>
#include <type_traits>

#include "test_allocator.h"
#include "test_macros.h"

int main(int, char**)
{
    {
      typedef limited_allocator<int, 10> A;
      typedef std::forward_list<int, A> C;
      C c;
      assert(c.max_size() <= 10);
      LIBCPP_ASSERT(c.max_size() == 10);
    }
    {
      typedef limited_allocator<int, (size_t)-1> A;
      typedef std::forward_list<int, A> C;
      const C::size_type max_dist =
          static_cast<C::size_type>(std::numeric_limits<C::difference_type>::max());
      C c;
      assert(c.max_size() <= max_dist);
      LIBCPP_ASSERT(c.max_size() == max_dist);
    }
    {
      typedef std::forward_list<char> C;
      const C::size_type max_dist =
          static_cast<C::size_type>(std::numeric_limits<C::difference_type>::max());
      C c;
      assert(c.max_size() <= max_dist);
      assert(c.max_size() <= alloc_max_size(c.get_allocator()));
    }

  return 0;
}