libcxx/test/std/concepts/concepts.lang/concepts.arithmetic/unsigned_integral.compile.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 // UNSUPPORTED: c++03, c++11, c++14, c++17
  10
  11 // template<class T>
  12 // concept unsigned_integral = // see below
  13
  14 #include <concepts>
  15 #include <type_traits>
  16
  17 #include "arithmetic.h"
  18 #include "test_macros.h"
  19
  20 template <typename T>
  21 constexpr bool CheckUnsignedIntegralQualifiers() {
  22   constexpr bool result = std::unsigned_integral<T>;
  23   static_assert(std::unsigned_integral<const T> == result);
  24   static_assert(std::unsigned_integral<volatile T> == result);
  25   static_assert(std::unsigned_integral<const volatile T> == result);
  26
  27   static_assert(!std::unsigned_integral<T&>);
  28   static_assert(!std::unsigned_integral<const T&>);
  29   static_assert(!std::unsigned_integral<volatile T&>);
  30   static_assert(!std::unsigned_integral<const volatile T&>);
  31
  32   static_assert(!std::unsigned_integral<T&&>);
  33   static_assert(!std::unsigned_integral<const T&&>);
  34   static_assert(!std::unsigned_integral<volatile T&&>);
  35   static_assert(!std::unsigned_integral<const volatile T&&>);
  36
  37   static_assert(!std::unsigned_integral<T*>);
  38   static_assert(!std::unsigned_integral<const T*>);
  39   static_assert(!std::unsigned_integral<volatile T*>);
  40   static_assert(!std::unsigned_integral<const volatile T*>);
  41
  42   static_assert(!std::unsigned_integral<T (*)()>);
  43   static_assert(!std::unsigned_integral<T (&)()>);
  44   static_assert(!std::unsigned_integral<T (&&)()>);
  45
  46   return result;
  47 }
  48
  49 // standard unsigned types
  50 static_assert(CheckUnsignedIntegralQualifiers<unsigned char>());
  51 static_assert(CheckUnsignedIntegralQualifiers<unsigned short>());
  52 static_assert(CheckUnsignedIntegralQualifiers<unsigned int>());
  53 static_assert(CheckUnsignedIntegralQualifiers<unsigned long>());
  54 static_assert(CheckUnsignedIntegralQualifiers<unsigned long long>());
  55
  56 // Whether bool and character types are signed or unsigned is impl-defined
  57 static_assert(CheckUnsignedIntegralQualifiers<wchar_t>() == !std::is_signed_v<wchar_t>);
  58 static_assert(CheckUnsignedIntegralQualifiers<bool>() == !std::is_signed_v<bool>);
  59 static_assert(CheckUnsignedIntegralQualifiers<char>() == !std::is_signed_v<char>);
  60 static_assert(CheckUnsignedIntegralQualifiers<char8_t>() == !std::is_signed_v<char8_t>);
  61 static_assert(CheckUnsignedIntegralQualifiers<char16_t>() == !std::is_signed_v<char16_t>);
  62 static_assert(CheckUnsignedIntegralQualifiers<char32_t>() == !std::is_signed_v<char32_t>);
  63
  64 // extended integers
  65 #ifndef TEST_HAS_NO_INT128
  66 static_assert(CheckUnsignedIntegralQualifiers<__uint128_t>());
  67 static_assert(!CheckUnsignedIntegralQualifiers<__int128_t>());
  68 #endif
  69
  70 // integer types that aren't unsigned integrals
  71 static_assert(!CheckUnsignedIntegralQualifiers<signed char>());
  72 static_assert(!CheckUnsignedIntegralQualifiers<short>());
  73 static_assert(!CheckUnsignedIntegralQualifiers<int>());
  74 static_assert(!CheckUnsignedIntegralQualifiers<long>());
  75 static_assert(!CheckUnsignedIntegralQualifiers<long long>());
  76
  77 static_assert(!std::unsigned_integral<void>);
  78 static_assert(!CheckUnsignedIntegralQualifiers<float>());
  79 static_assert(!CheckUnsignedIntegralQualifiers<double>());
  80 static_assert(!CheckUnsignedIntegralQualifiers<long double>());
  81
  82 static_assert(!CheckUnsignedIntegralQualifiers<ClassicEnum>());
  83 static_assert(!CheckUnsignedIntegralQualifiers<ScopedEnum>());
  84 static_assert(!CheckUnsignedIntegralQualifiers<EmptyStruct>());
  85 static_assert(!CheckUnsignedIntegralQualifiers<int EmptyStruct::*>());
  86 static_assert(!CheckUnsignedIntegralQualifiers<int (EmptyStruct::*)()>());
  87
  88 static_assert(CheckSubsumption(0));
  89 static_assert(CheckSubsumption(0U));