| 1 | //===----------------------------------------------------------------------===// |
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | // type_traits |
| 10 | |
| 11 | // is_signed |
| 12 | |
| 13 | #include <type_traits> |
| 14 | #include <cstddef> |
| 15 | |
| 16 | #include "test_macros.h" |
| 17 | |
| 18 | template <class T> |
| 19 | void test_is_signed() |
| 20 | { |
| 21 | static_assert( std::is_signed<T>::value, "" ); |
| 22 | static_assert( std::is_signed<const T>::value, "" ); |
| 23 | static_assert( std::is_signed<volatile T>::value, "" ); |
| 24 | static_assert( std::is_signed<const volatile T>::value, "" ); |
| 25 | #if TEST_STD_VER > 14 |
| 26 | static_assert( std::is_signed_v<T>, "" ); |
| 27 | static_assert( std::is_signed_v<const T>, "" ); |
| 28 | static_assert( std::is_signed_v<volatile T>, "" ); |
| 29 | static_assert( std::is_signed_v<const volatile T>, "" ); |
| 30 | #endif |
| 31 | } |
| 32 | |
| 33 | template <class T> |
| 34 | void test_is_not_signed() |
| 35 | { |
| 36 | static_assert(!std::is_signed<T>::value, "" ); |
| 37 | static_assert(!std::is_signed<const T>::value, "" ); |
| 38 | static_assert(!std::is_signed<volatile T>::value, "" ); |
| 39 | static_assert(!std::is_signed<const volatile T>::value, "" ); |
| 40 | #if TEST_STD_VER > 14 |
| 41 | static_assert(!std::is_signed_v<T>, "" ); |
| 42 | static_assert(!std::is_signed_v<const T>, "" ); |
| 43 | static_assert(!std::is_signed_v<volatile T>, "" ); |
| 44 | static_assert(!std::is_signed_v<const volatile T>, "" ); |
| 45 | #endif |
| 46 | } |
| 47 | |
| 48 | class Class |
| 49 | { |
| 50 | public: |
| 51 | ~Class(); |
| 52 | }; |
| 53 | |
| 54 | struct A; // incomplete |
| 55 | |
| 56 | class incomplete_type; |
| 57 | |
| 58 | class Empty {}; |
| 59 | |
| 60 | class NotEmpty { |
| 61 | virtual ~NotEmpty(); |
| 62 | }; |
| 63 | |
| 64 | union Union {}; |
| 65 | |
| 66 | struct bit_zero { |
| 67 | int : 0; |
| 68 | }; |
| 69 | |
| 70 | class Abstract { |
| 71 | virtual ~Abstract() = 0; |
| 72 | }; |
| 73 | |
| 74 | enum Enum { zero, one }; |
| 75 | |
| 76 | enum EnumSigned : int { two }; |
| 77 | |
| 78 | enum EnumUnsigned : unsigned { three }; |
| 79 | |
| 80 | enum class EnumClass { zero, one }; |
| 81 | |
| 82 | typedef void (*FunctionPtr)(); |
| 83 | |
| 84 | int main(int, char**) |
| 85 | { |
| 86 | // Cases where !is_arithmetic implies !is_signed |
| 87 | test_is_not_signed<std::nullptr_t>(); |
| 88 | test_is_not_signed<void>(); |
| 89 | test_is_not_signed<int&>(); |
| 90 | test_is_not_signed<int&&>(); |
| 91 | test_is_not_signed<Class>(); |
| 92 | test_is_not_signed<int*>(); |
| 93 | test_is_not_signed<const int*>(); |
| 94 | test_is_not_signed<char[3]>(); |
| 95 | test_is_not_signed<char[]>(); |
| 96 | test_is_not_signed<Union>(); |
| 97 | test_is_not_signed<Enum>(); |
| 98 | test_is_not_signed<EnumSigned>(); |
| 99 | test_is_not_signed<EnumUnsigned>(); |
| 100 | test_is_not_signed<EnumClass>(); |
| 101 | test_is_not_signed<FunctionPtr>(); |
| 102 | test_is_not_signed<Empty>(); |
| 103 | test_is_not_signed<incomplete_type>(); |
| 104 | test_is_not_signed<A>(); |
| 105 | test_is_not_signed<bit_zero>(); |
| 106 | test_is_not_signed<NotEmpty>(); |
| 107 | test_is_not_signed<Abstract>(); |
| 108 | |
| 109 | test_is_signed<signed char>(); |
| 110 | test_is_signed<short>(); |
| 111 | test_is_signed<int>(); |
| 112 | test_is_signed<long>(); |
| 113 | test_is_signed<float>(); |
| 114 | test_is_signed<double>(); |
| 115 | |
| 116 | test_is_not_signed<unsigned char>(); |
| 117 | test_is_not_signed<unsigned short>(); |
| 118 | test_is_not_signed<unsigned int>(); |
| 119 | test_is_not_signed<unsigned long>(); |
| 120 | |
| 121 | test_is_not_signed<bool>(); |
| 122 | test_is_not_signed<unsigned>(); |
| 123 | |
| 124 | #ifndef TEST_HAS_NO_INT128 |
| 125 | test_is_signed<__int128_t>(); |
| 126 | test_is_not_signed<__uint128_t>(); |
| 127 | #endif |
| 128 | |
| 129 | return 0; |
| 130 | } |
| 131 | |