1 // Copyright (C) 2019-2021 Free Software Foundation, Inc.
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++2a" }
19 // { dg-do compile { target c++2a } }
20 
21 #include <concepts>
22 
23 // signed integer types
24 static_assert( std::signed_integral<signed char> );
25 static_assert( std::signed_integral<signed short> );
26 static_assert( std::signed_integral<signed int> );
27 static_assert( std::signed_integral<signed long> );
28 static_assert( std::signed_integral<signed long long> );
29 
30 // unsigned integer types
31 static_assert( !std::signed_integral<unsigned char> );
32 static_assert( !std::signed_integral<unsigned short> );
33 static_assert( !std::signed_integral<unsigned int> );
34 static_assert( !std::signed_integral<unsigned long> );
35 static_assert( !std::signed_integral<unsigned long long> );
36 
37 // other integral types
38 static_assert( !std::signed_integral<bool> );
39 static_assert( std::is_signed_v<char> ? std::signed_integral<char> : true );
40 static_assert( !std::signed_integral<char16_t> );
41 static_assert( !std::signed_integral<char32_t> );
42 static_assert( std::is_signed_v<wchar_t> ? std::signed_integral<wchar_t> : true );
43 #ifdef _GLIBCXX_USE_CHAR8_T
44 static_assert( !std::signed_integral<char8_t> );
45 #endif
46 
47 #ifdef __GLIBCXX_TYPE_INT_N_0
48 static_assert( std::signed_integral<signed __GLIBCXX_TYPE_INT_N_0> );
49 static_assert( !std::signed_integral<unsigned __GLIBCXX_TYPE_INT_N_0> );
50 #endif
51 
52 static_assert( !std::signed_integral<void> );
53 static_assert( !std::signed_integral<float> );
54 static_assert( !std::signed_integral<int&> );
55 static_assert( !std::signed_integral<int&> );
56 static_assert( !std::signed_integral<int&&> );
57 static_assert( !std::signed_integral<const int&> );
58 static_assert( !std::signed_integral<int[]> );
59 static_assert( !std::signed_integral<int[2]> );
60 static_assert( !std::signed_integral<int()> );
61 static_assert( !std::signed_integral<int(*)()> );
62 static_assert( !std::signed_integral<int(&)()> );
63 
64 enum E { };
65 static_assert( !std::signed_integral<E> );
66 enum class CE { };
67 static_assert( !std::signed_integral<CE> );
68 struct A { };
69 static_assert( !std::signed_integral<A> );
70 union B { };
71 static_assert( !std::signed_integral<B> );
72