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99dee823 | 1 | // Copyright (C) 2017-2021 Free Software Foundation, Inc. |
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2 | // |
3 | // This file is part of the GNU ISO C++ Library. This library is free | |
4 | // software; you can redistribute it and/or modify it under the | |
5 | // terms of the GNU General Public License as published by the | |
6 | // Free Software Foundation; either version 3, or (at your option) | |
7 | // any later version. | |
8 | ||
9 | // This library is distributed in the hope that it will be useful, | |
10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | // GNU General Public License for more details. | |
13 | ||
14 | // You should have received a copy of the GNU General Public License along | |
15 | // with this library; see the file COPYING3. If not see | |
16 | // <http://www.gnu.org/licenses/>. | |
17 | ||
18 | // { dg-options "-std=gnu++17" } | |
7b936140 | 19 | // { dg-do compile { target c++17 } } |
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20 | |
21 | #include <cstddef> | |
22 | ||
253e8d21 JW |
23 | #ifndef __cpp_lib_byte |
24 | # error "Feature-test macro for byte missing" | |
25 | #elif __cpp_lib_byte != 201603 | |
26 | # error "Feature-test macro for byte has wrong value" | |
27 | #endif | |
28 | ||
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29 | static_assert( sizeof(std::byte) == sizeof(unsigned char) ); |
30 | static_assert( alignof(std::byte) == alignof(unsigned char) ); | |
31 | ||
32 | // Use the built-in to avoid depending on <type_traits> | |
33 | __underlying_type(std::byte)* p = (unsigned char*)nullptr; |