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

// <stddef.h>

#include <stddef.h>

#include "test_macros.h"

void use() {
    // Make sure we can use the following types without including anything else
    (void)sizeof(size_t);
    (void)sizeof(ptrdiff_t);
#if TEST_STD_VER >= 11
    (void)sizeof(nullptr);
    (void)sizeof(nullptr_t);
    (void)sizeof(max_align_t);
#endif
}

#ifndef NULL
#error NULL not defined
#endif

#ifndef offsetof
#error offsetof not defined
#endif

#include <type_traits>

static_assert(sizeof(size_t) == sizeof(void*), "");
static_assert(std::is_unsigned<size_t>::value, "");
static_assert(std::is_integral<size_t>::value, "");
static_assert(sizeof(ptrdiff_t) == sizeof(void*), "");
static_assert(std::is_signed<ptrdiff_t>::value, "");
static_assert(std::is_integral<ptrdiff_t>::value, "");
static_assert((std::is_same<decltype(nullptr), nullptr_t>::value), "");
static_assert(sizeof(nullptr_t) == sizeof(void*), "");
#if TEST_STD_VER >= 11
#  if TEST_STD_VER >= 20
// P0767R1 and P3247R2
static_assert(std::is_trivially_copyable<max_align_t>::value, "");
static_assert(std::is_trivially_default_constructible<max_align_t>::value, "");
static_assert(std::is_standard_layout<max_align_t>::value, "");
#  else
static_assert(std::is_pod<max_align_t>::value, "");
#  endif
static_assert(std::alignment_of<max_align_t>::value >= std::alignment_of<long long>::value, "");
static_assert(std::alignment_of<max_align_t>::value >= std::alignment_of<long double>::value, "");
static_assert(std::alignment_of<max_align_t>::value >= std::alignment_of<void*>::value, "");
#endif // TEST_STD_VER >= 11
