libcxx/test/std/depr/depr.c.headers/stddef_h.compile.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <stddef.h>
  10
  11 #include <stddef.h>
  12
  13 #include "test_macros.h"
  14
  15 void use() {
  16     // Make sure we can use the following types without including anything else
  17     (void)sizeof(size_t);
  18     (void)sizeof(ptrdiff_t);
  19 #if TEST_STD_VER >= 11
  20     (void)sizeof(nullptr);
  21     (void)sizeof(nullptr_t);
  22     (void)sizeof(max_align_t);
  23 #endif
  24 }
  25
  26 #ifndef NULL
  27 #error NULL not defined
  28 #endif
  29
  30 #ifndef offsetof
  31 #error offsetof not defined
  32 #endif
  33
  34 #include <type_traits>
  35
  36 static_assert(sizeof(size_t) == sizeof(void*), "");
  37 static_assert(std::is_unsigned<size_t>::value, "");
  38 static_assert(std::is_integral<size_t>::value, "");
  39 static_assert(sizeof(ptrdiff_t) == sizeof(void*), "");
  40 static_assert(std::is_signed<ptrdiff_t>::value, "");
  41 static_assert(std::is_integral<ptrdiff_t>::value, "");
  42 static_assert((std::is_same<decltype(nullptr), nullptr_t>::value), "");
  43 static_assert(sizeof(nullptr_t) == sizeof(void*), "");
  44 #if TEST_STD_VER >= 11
  45 #  if TEST_STD_VER >= 20
  46 // P0767
  47 static_assert(std::is_trivial<max_align_t>::value, "");
  48 static_assert(std::is_standard_layout<max_align_t>::value, "");
  49 #  else
  50 static_assert(std::is_pod<max_align_t>::value, "");
  51 #  endif
  52 static_assert(std::alignment_of<max_align_t>::value >= std::alignment_of<long long>::value, "");
  53 static_assert(std::alignment_of<max_align_t>::value >= std::alignment_of<long double>::value, "");
  54 static_assert(std::alignment_of<max_align_t>::value >= std::alignment_of<void*>::value, "");
  55 #endif // TEST_STD_VER >= 11