libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_unsigned.pass.cpp

   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_unsigned
  12
  13 #include <type_traits>
  14 #include "test_macros.h"
  15
  16 template <class T>
  17 void test_is_unsigned()
  18 {
  19     static_assert( std::is_unsigned<T>::value, "");
  20     static_assert( std::is_unsigned<const T>::value, "");
  21     static_assert( std::is_unsigned<volatile T>::value, "");
  22     static_assert( std::is_unsigned<const volatile T>::value, "");
  23 #if TEST_STD_VER > 14
  24     static_assert( std::is_unsigned_v<T>, "");
  25     static_assert( std::is_unsigned_v<const T>, "");
  26     static_assert( std::is_unsigned_v<volatile T>, "");
  27     static_assert( std::is_unsigned_v<const volatile T>, "");
  28 #endif
  29 }
  30
  31 template <class T>
  32 void test_is_not_unsigned()
  33 {
  34     static_assert(!std::is_unsigned<T>::value, "");
  35     static_assert(!std::is_unsigned<const T>::value, "");
  36     static_assert(!std::is_unsigned<volatile T>::value, "");
  37     static_assert(!std::is_unsigned<const volatile T>::value, "");
  38 #if TEST_STD_VER > 14
  39     static_assert(!std::is_unsigned_v<T>, "");
  40     static_assert(!std::is_unsigned_v<const T>, "");
  41     static_assert(!std::is_unsigned_v<volatile T>, "");
  42     static_assert(!std::is_unsigned_v<const volatile T>, "");
  43 #endif
  44 }
  45
  46 class Class
  47 {
  48 public:
  49     ~Class();
  50 };
  51
  52 struct A; // incomplete
  53
  54 class incomplete_type;
  55
  56 class Empty {};
  57
  58 class NotEmpty {
  59   virtual ~NotEmpty();
  60 };
  61
  62 union Union {};
  63
  64 struct bit_zero {
  65   int : 0;
  66 };
  67
  68 class Abstract {
  69   virtual ~Abstract() = 0;
  70 };
  71
  72 enum Enum { zero, one };
  73
  74 enum EnumSigned : int { two };
  75
  76 enum EnumUnsigned : unsigned { three };
  77
  78 enum class EnumClass { zero, one };
  79
  80 typedef void (*FunctionPtr)();
  81
  82 int main(int, char**)
  83 {
  84   // Cases where !is_arithmetic implies !is_unsigned
  85   test_is_not_unsigned<std::nullptr_t>();
  86   test_is_not_unsigned<void>();
  87   test_is_not_unsigned<int&>();
  88   test_is_not_unsigned<int&&>();
  89   test_is_not_unsigned<Class>();
  90   test_is_not_unsigned<int*>();
  91   test_is_not_unsigned<const int*>();
  92   test_is_not_unsigned<char[3]>();
  93   test_is_not_unsigned<char[]>();
  94   test_is_not_unsigned<Union>();
  95   test_is_not_unsigned<Enum>();
  96   test_is_not_unsigned<EnumSigned>();
  97   test_is_not_unsigned<EnumUnsigned>();
  98   test_is_not_unsigned<EnumClass>();
  99   test_is_not_unsigned<FunctionPtr>();
 100   test_is_not_unsigned<Empty>();
 101   test_is_not_unsigned<incomplete_type>();
 102   test_is_not_unsigned<A>();
 103   test_is_not_unsigned<bit_zero>();
 104   test_is_not_unsigned<NotEmpty>();
 105   test_is_not_unsigned<Abstract>();
 106
 107   test_is_not_unsigned<signed char>();
 108   test_is_not_unsigned<short>();
 109   test_is_not_unsigned<int>();
 110   test_is_not_unsigned<long>();
 111   test_is_not_unsigned<float>();
 112   test_is_not_unsigned<double>();
 113
 114   test_is_unsigned<unsigned char>();
 115   test_is_unsigned<unsigned short>();
 116   test_is_unsigned<unsigned int>();
 117   test_is_unsigned<unsigned long>();
 118
 119   test_is_unsigned<bool>();
 120   test_is_unsigned<unsigned>();
 121
 122 #ifndef TEST_HAS_NO_INT128
 123     test_is_unsigned<__uint128_t>();
 124     test_is_not_unsigned<__int128_t>();
 125 #endif
 126
 127   return 0;
 128 }