libcxx/test/std/concepts/concepts.lang/concepts.arithmetic/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 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 CheckIntegralQualifiers() {
  22   constexpr bool result = std::integral<T>;
  23   static_assert(std::integral<const T> == result);
  24   static_assert(std::integral<volatile T> == result);
  25   static_assert(std::integral<const volatile T> == result);
  26
  27   static_assert(!std::integral<T&>);
  28   static_assert(!std::integral<const T&>);
  29   static_assert(!std::integral<volatile T&>);
  30   static_assert(!std::integral<const volatile T&>);
  31
  32   static_assert(!std::integral<T&&>);
  33   static_assert(!std::integral<const T&&>);
  34   static_assert(!std::integral<volatile T&&>);
  35   static_assert(!std::integral<const volatile T&&>);
  36
  37   static_assert(!std::integral<T*>);
  38   static_assert(!std::integral<const T*>);
  39   static_assert(!std::integral<volatile T*>);
  40   static_assert(!std::integral<const volatile T*>);
  41
  42   static_assert(!std::integral<T (*)()>);
  43   static_assert(!std::integral<T (&)()>);
  44   static_assert(!std::integral<T (&&)()>);
  45
  46   return result;
  47 }
  48
  49 // standard signed and unsigned integers
  50 static_assert(CheckIntegralQualifiers<signed char>());
  51 static_assert(CheckIntegralQualifiers<unsigned char>());
  52 static_assert(CheckIntegralQualifiers<short>());
  53 static_assert(CheckIntegralQualifiers<unsigned short>());
  54 static_assert(CheckIntegralQualifiers<int>());
  55 static_assert(CheckIntegralQualifiers<unsigned int>());
  56 static_assert(CheckIntegralQualifiers<long>());
  57 static_assert(CheckIntegralQualifiers<unsigned long>());
  58 static_assert(CheckIntegralQualifiers<long long>());
  59 static_assert(CheckIntegralQualifiers<unsigned long long>());
  60
  61 // extended integers
  62 #ifndef TEST_HAS_NO_INT128
  63 static_assert(CheckIntegralQualifiers<__int128_t>());
  64 static_assert(CheckIntegralQualifiers<__uint128_t>());
  65 #endif
  66
  67 // bool and char types are also integral
  68 static_assert(CheckIntegralQualifiers<wchar_t>());
  69 static_assert(CheckIntegralQualifiers<bool>());
  70 static_assert(CheckIntegralQualifiers<char>());
  71 static_assert(CheckIntegralQualifiers<char8_t>());
  72 static_assert(CheckIntegralQualifiers<char16_t>());
  73 static_assert(CheckIntegralQualifiers<char32_t>());
  74
  75 // types that aren't integral
  76 static_assert(!std::integral<void>);
  77 static_assert(!CheckIntegralQualifiers<float>());
  78 static_assert(!CheckIntegralQualifiers<double>());
  79 static_assert(!CheckIntegralQualifiers<long double>());
  80
  81 static_assert(!CheckIntegralQualifiers<ClassicEnum>());
  82
  83 static_assert(!CheckIntegralQualifiers<ScopedEnum>());
  84
  85 static_assert(!CheckIntegralQualifiers<EmptyStruct>());
  86 static_assert(!CheckIntegralQualifiers<int EmptyStruct::*>());
  87 static_assert(!CheckIntegralQualifiers<int (EmptyStruct::*)()>());
  88
  89 static_assert(CheckSubsumption(0));
  90 static_assert(CheckSubsumption(0U));