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62 lines
2.0 KiB
C++
62 lines
2.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// type_traits
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// alignment_of
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#include <type_traits>
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#include <cstdint>
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#include "test_macros.h"
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template <class T, unsigned A>
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void test_alignment_of()
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{
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const unsigned AlignofResult = TEST_ALIGNOF(T);
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static_assert( AlignofResult == A, "Golden value does not match result of alignof keyword");
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static_assert( std::alignment_of<T>::value == AlignofResult, "");
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static_assert( std::alignment_of<T>::value == A, "");
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static_assert( std::alignment_of<const T>::value == A, "");
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static_assert( std::alignment_of<volatile T>::value == A, "");
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static_assert( std::alignment_of<const volatile T>::value == A, "");
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#if TEST_STD_VER > 14
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static_assert( std::alignment_of_v<T> == A, "");
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static_assert( std::alignment_of_v<const T> == A, "");
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static_assert( std::alignment_of_v<volatile T> == A, "");
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static_assert( std::alignment_of_v<const volatile T> == A, "");
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#endif
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}
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class Class
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{
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public:
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~Class();
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};
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int main()
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{
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test_alignment_of<int&, 4>();
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test_alignment_of<Class, 1>();
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test_alignment_of<int*, sizeof(intptr_t)>();
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test_alignment_of<const int*, sizeof(intptr_t)>();
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test_alignment_of<char[3], 1>();
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test_alignment_of<int, 4>();
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// The test case below is a hack. It's hard to detect what golden value
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// we should expect. In most cases it should be 8. But in i386 builds
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// with Clang >= 8 or GCC >= 8 the value is '4'.
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test_alignment_of<double, TEST_ALIGNOF(double)>();
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#if (defined(__ppc__) && !defined(__ppc64__))
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test_alignment_of<bool, 4>(); // 32-bit PPC has four byte bool
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#else
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test_alignment_of<bool, 1>();
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#endif
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test_alignment_of<unsigned, 4>();
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}
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