| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // type_traits |
| |
| // aligned_union<size_t Len, class ...Types> |
| |
| // Issue 3034 added: |
| // The member typedef type shall be a trivial standard-layout type. |
| |
| #include <type_traits> |
| |
| #include "test_macros.h" |
| |
| int main(int, char**) |
| { |
| { |
| typedef std::aligned_union<10, char >::type T1; |
| #if TEST_STD_VER > 11 |
| ASSERT_SAME_TYPE(T1, std::aligned_union_t<10, char>); |
| #endif |
| static_assert(std::is_trivial<T1>::value, ""); |
| static_assert(std::is_standard_layout<T1>::value, ""); |
| static_assert(std::alignment_of<T1>::value == 1, ""); |
| static_assert(sizeof(T1) == 10, ""); |
| } |
| { |
| typedef std::aligned_union<10, short >::type T1; |
| #if TEST_STD_VER > 11 |
| ASSERT_SAME_TYPE(T1, std::aligned_union_t<10, short>); |
| #endif |
| static_assert(std::is_trivial<T1>::value, ""); |
| static_assert(std::is_standard_layout<T1>::value, ""); |
| static_assert(std::alignment_of<T1>::value == 2, ""); |
| static_assert(sizeof(T1) == 10, ""); |
| } |
| { |
| typedef std::aligned_union<10, int >::type T1; |
| #if TEST_STD_VER > 11 |
| ASSERT_SAME_TYPE(T1, std::aligned_union_t<10, int>); |
| #endif |
| static_assert(std::is_trivial<T1>::value, ""); |
| static_assert(std::is_standard_layout<T1>::value, ""); |
| static_assert(std::alignment_of<T1>::value == 4, ""); |
| static_assert(sizeof(T1) == 12, ""); |
| } |
| { |
| typedef std::aligned_union<10, double >::type T1; |
| #if TEST_STD_VER > 11 |
| ASSERT_SAME_TYPE(T1, std::aligned_union_t<10, double>); |
| #endif |
| static_assert(std::is_trivial<T1>::value, ""); |
| static_assert(std::is_standard_layout<T1>::value, ""); |
| static_assert(std::alignment_of<T1>::value == 8, ""); |
| static_assert(sizeof(T1) == 16, ""); |
| } |
| { |
| typedef std::aligned_union<10, short, char >::type T1; |
| #if TEST_STD_VER > 11 |
| ASSERT_SAME_TYPE(T1, std::aligned_union_t<10, short, char>); |
| #endif |
| static_assert(std::is_trivial<T1>::value, ""); |
| static_assert(std::is_standard_layout<T1>::value, ""); |
| static_assert(std::alignment_of<T1>::value == 2, ""); |
| static_assert(sizeof(T1) == 10, ""); |
| } |
| { |
| typedef std::aligned_union<10, char, short >::type T1; |
| #if TEST_STD_VER > 11 |
| ASSERT_SAME_TYPE(T1, std::aligned_union_t<10, char, short>); |
| #endif |
| static_assert(std::is_trivial<T1>::value, ""); |
| static_assert(std::is_standard_layout<T1>::value, ""); |
| static_assert(std::alignment_of<T1>::value == 2, ""); |
| static_assert(sizeof(T1) == 10, ""); |
| } |
| { |
| typedef std::aligned_union<2, int, char, short >::type T1; |
| #if TEST_STD_VER > 11 |
| ASSERT_SAME_TYPE(T1, std::aligned_union_t<2, int, char, short>); |
| #endif |
| static_assert(std::is_trivial<T1>::value, ""); |
| static_assert(std::is_standard_layout<T1>::value, ""); |
| static_assert(std::alignment_of<T1>::value == 4, ""); |
| static_assert(sizeof(T1) == 4, ""); |
| } |
| { |
| typedef std::aligned_union<2, char, int, short >::type T1; |
| #if TEST_STD_VER > 11 |
| ASSERT_SAME_TYPE(T1, std::aligned_union_t<2, char, int, short>); |
| #endif |
| static_assert(std::is_trivial<T1>::value, ""); |
| static_assert(std::is_standard_layout<T1>::value, ""); |
| static_assert(std::alignment_of<T1>::value == 4, ""); |
| static_assert(sizeof(T1) == 4, ""); |
| } |
| { |
| typedef std::aligned_union<2, char, short, int >::type T1; |
| #if TEST_STD_VER > 11 |
| ASSERT_SAME_TYPE(T1, std::aligned_union_t<2, char, short, int>); |
| #endif |
| static_assert(std::is_trivial<T1>::value, ""); |
| static_assert(std::is_standard_layout<T1>::value, ""); |
| static_assert(std::alignment_of<T1>::value == 4, ""); |
| static_assert(sizeof(T1) == 4, ""); |
| } |
| |
| return 0; |
| } |