libcxx/test/std/utilities/meta/meta.unary.prop.query/alignment_of.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 // type_traits
  10
  11 // alignment_of
  12
  13 #include <type_traits>
  14 #include <cstdint>
  15
  16 #include "test_macros.h"
  17
  18 template <class T, unsigned A>
  19 void test_alignment_of()
  20 {
  21     const unsigned AlignofResult = TEST_ALIGNOF(T);
  22     static_assert( AlignofResult == A, "Golden value does not match result of alignof keyword");
  23     static_assert( std::alignment_of<T>::value == AlignofResult, "");
  24     static_assert( std::alignment_of<T>::value == A, "");
  25     static_assert( std::alignment_of<const T>::value == A, "");
  26     static_assert( std::alignment_of<volatile T>::value == A, "");
  27     static_assert( std::alignment_of<const volatile T>::value == A, "");
  28 #if TEST_STD_VER > 14
  29     static_assert( std::alignment_of_v<T> == A, "");
  30     static_assert( std::alignment_of_v<const T> == A, "");
  31     static_assert( std::alignment_of_v<volatile T> == A, "");
  32     static_assert( std::alignment_of_v<const volatile T> == A, "");
  33 #endif
  34 }
  35
  36 class Class
  37 {
  38 public:
  39     ~Class();
  40 };
  41
  42 int main(int, char**)
  43 {
  44     test_alignment_of<int&, 4>();
  45     test_alignment_of<Class, 1>();
  46     test_alignment_of<int*, sizeof(std::intptr_t)>();
  47     test_alignment_of<const int*, sizeof(std::intptr_t)>();
  48     test_alignment_of<char[3], 1>();
  49     test_alignment_of<int, 4>();
  50     test_alignment_of<double, TEST_ALIGNOF(double)>();
  51     test_alignment_of<bool, 1>();
  52     test_alignment_of<unsigned, 4>();
  53
  54   return 0;
  55 }