d4b59a05fc
Even if these comments have a benefit in .h files (for editors that care about language but can't be configured to treat .h as C++ code), they certainly have no benefit for files with the .cpp extension. Discussed in D110794.
37 lines
1.1 KiB
C++
37 lines
1.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// Test that _LIBCPP_ALIGNOF acts the same as the C++11 keyword `alignof`, and
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// not as the GNU extension `__alignof`. The former returns the minimal required
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// alignment for a type, whereas the latter returns the preferred alignment.
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//
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// See llvm.org/PR39713
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#include <type_traits>
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#include "test_macros.h"
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template <class T>
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void test() {
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static_assert(_LIBCPP_ALIGNOF(T) == std::alignment_of<T>::value, "");
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static_assert(_LIBCPP_ALIGNOF(T) == TEST_ALIGNOF(T), "");
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#if TEST_STD_VER >= 11
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static_assert(_LIBCPP_ALIGNOF(T) == alignof(T), "");
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#endif
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#ifdef TEST_COMPILER_CLANG
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static_assert(_LIBCPP_ALIGNOF(T) == _Alignof(T), "");
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#endif
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}
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int main(int, char**) {
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test<int>();
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test<long long>();
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test<double>();
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test<long double>();
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return 0;
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}
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