libcxx/test/std/concepts/concepts.lang/concepts.arithmetic/floating_point.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 floating_point = // see below
  13
  14 #include <concepts>
  15 #include <type_traits>
  16
  17 #include "arithmetic.h"
  18
  19 template <typename T>
  20 constexpr bool CheckFloatingPointQualifiers() {
  21   constexpr bool result = std::floating_point<T>;
  22   static_assert(std::floating_point<const T> == result);
  23   static_assert(std::floating_point<volatile T> == result);
  24   static_assert(std::floating_point<const volatile T> == result);
  25
  26   static_assert(!std::floating_point<T&>);
  27   static_assert(!std::floating_point<const T&>);
  28   static_assert(!std::floating_point<volatile T&>);
  29   static_assert(!std::floating_point<const volatile T&>);
  30
  31   static_assert(!std::floating_point<T&&>);
  32   static_assert(!std::floating_point<const T&&>);
  33   static_assert(!std::floating_point<volatile T&&>);
  34   static_assert(!std::floating_point<const volatile T&&>);
  35
  36   static_assert(!std::floating_point<T*>);
  37   static_assert(!std::floating_point<const T*>);
  38   static_assert(!std::floating_point<volatile T*>);
  39   static_assert(!std::floating_point<const volatile T*>);
  40
  41   static_assert(!std::floating_point<T (*)()>);
  42   static_assert(!std::floating_point<T (&)()>);
  43   static_assert(!std::floating_point<T (&&)()>);
  44
  45   return result;
  46 }
  47
  48 // floating-point types
  49 static_assert(CheckFloatingPointQualifiers<float>());
  50 static_assert(CheckFloatingPointQualifiers<double>());
  51 static_assert(CheckFloatingPointQualifiers<long double>());
  52
  53 // types that aren't floating-point
  54 static_assert(!CheckFloatingPointQualifiers<signed char>());
  55 static_assert(!CheckFloatingPointQualifiers<unsigned char>());
  56 static_assert(!CheckFloatingPointQualifiers<short>());
  57 static_assert(!CheckFloatingPointQualifiers<unsigned short>());
  58 static_assert(!CheckFloatingPointQualifiers<int>());
  59 static_assert(!CheckFloatingPointQualifiers<unsigned int>());
  60 static_assert(!CheckFloatingPointQualifiers<long>());
  61 static_assert(!CheckFloatingPointQualifiers<unsigned long>());
  62 static_assert(!CheckFloatingPointQualifiers<long long>());
  63 static_assert(!CheckFloatingPointQualifiers<unsigned long long>());
  64 static_assert(!CheckFloatingPointQualifiers<wchar_t>());
  65 static_assert(!CheckFloatingPointQualifiers<bool>());
  66 static_assert(!CheckFloatingPointQualifiers<char>());
  67 static_assert(!CheckFloatingPointQualifiers<char8_t>());
  68 static_assert(!CheckFloatingPointQualifiers<char16_t>());
  69 static_assert(!CheckFloatingPointQualifiers<char32_t>());
  70 static_assert(!std::floating_point<void>);
  71
  72 static_assert(!CheckFloatingPointQualifiers<ClassicEnum>());
  73 static_assert(!CheckFloatingPointQualifiers<ScopedEnum>());
  74 static_assert(!CheckFloatingPointQualifiers<EmptyStruct>());
  75 static_assert(!CheckFloatingPointQualifiers<int EmptyStruct::*>());
  76 static_assert(!CheckFloatingPointQualifiers<int (EmptyStruct::*)()>());