libcxx/test/std/depr/depr.c.headers/stddef_h.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.
//
//===----------------------------------------------------------------------===//

// <stddef.h>

#include <stddef.h>
#include <cassert>
#include <type_traits>

#include "test_macros.h"

#ifndef NULL
#error NULL not defined
#endif

#ifndef offsetof
#error offsetof not defined
#endif

int main()
{
    void *p = NULL;
    assert(!p);

    static_assert(sizeof(size_t) == sizeof(void*),
                  "sizeof(size_t) == sizeof(void*)");
    static_assert(std::is_unsigned<size_t>::value,
                  "std::is_unsigned<size_t>::value");
    static_assert(std::is_integral<size_t>::value,
                  "std::is_integral<size_t>::value");
    static_assert(sizeof(ptrdiff_t) == sizeof(void*),
                  "sizeof(ptrdiff_t) == sizeof(void*)");
    static_assert(std::is_signed<ptrdiff_t>::value,
                  "std::is_signed<ptrdiff_t>::value");
    static_assert(std::is_integral<ptrdiff_t>::value,
                  "std::is_integral<ptrdiff_t>::value");
    static_assert((std::is_same<decltype(nullptr), nullptr_t>::value),
                  "decltype(nullptr) == nullptr_t");
    static_assert(sizeof(nullptr_t) == sizeof(void*),
                  "sizeof(nullptr_t) == sizeof(void*)");
#if TEST_STD_VER > 17
//   P0767
    static_assert(std::is_trivial<max_align_t>::value,
                  "std::is_trivial<max_align_t>::value");
    static_assert(std::is_standard_layout<max_align_t>::value,
                  "std::is_standard_layout<max_align_t>::value");
#else
    static_assert(std::is_pod<max_align_t>::value,
                  "std::is_pod<max_align_t>::value");
#endif
    static_assert((std::alignment_of<max_align_t>::value >=
                  std::alignment_of<long long>::value),
                  "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,
                  "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,
                  "std::alignment_of<max_align_t>::value >= "
                  "std::alignment_of<void*>::value");
}