libstdc++-v3/testsuite/std/concepts/concepts.lang/concept.arithmetic/unsigned_integral.cc

   1 // Copyright (C) 2019-2021 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-options "-std=gnu++2a" }
  19 // { dg-do compile { target c++2a } }
  20
  21 #include <concepts>
  22
  23 // unsigned integer types
  24 static_assert( std::unsigned_integral<unsigned char> );
  25 static_assert( std::unsigned_integral<unsigned short> );
  26 static_assert( std::unsigned_integral<unsigned int> );
  27 static_assert( std::unsigned_integral<unsigned long> );
  28 static_assert( std::unsigned_integral<unsigned long long> );
  29
  30 // signed integer types
  31 static_assert( !std::unsigned_integral<signed char> );
  32 static_assert( !std::unsigned_integral<signed short> );
  33 static_assert( !std::unsigned_integral<signed int> );
  34 static_assert( !std::unsigned_integral<signed long> );
  35 static_assert( !std::unsigned_integral<signed long long> );
  36
  37 // other integral types
  38 static_assert( std::unsigned_integral<bool> );
  39 static_assert( std::is_signed_v<char> ? true : std::unsigned_integral<char> );
  40 static_assert( std::unsigned_integral<char16_t> );
  41 static_assert( std::unsigned_integral<char32_t> );
  42 #ifdef _GLIBCXX_USE_WCHAR_T
  43 static_assert( std::is_signed_v<wchar_t> ? true : std::unsigned_integral<wchar_t> );
  44 #endif
  45 #ifdef _GLIBCXX_USE_CHAR8_T
  46 static_assert( std::unsigned_integral<char8_t> );
  47 #endif
  48
  49 #ifdef __GLIBCXX_TYPE_INT_N_0
  50 static_assert( !std::unsigned_integral<signed __GLIBCXX_TYPE_INT_N_0> );
  51 static_assert( std::unsigned_integral<unsigned __GLIBCXX_TYPE_INT_N_0> );
  52 #endif
  53
  54 static_assert( !std::unsigned_integral<void> );
  55 static_assert( !std::unsigned_integral<float> );
  56 static_assert( !std::unsigned_integral<unsigned&> );
  57 static_assert( !std::unsigned_integral<unsigned&> );
  58 static_assert( !std::unsigned_integral<unsigned&&> );
  59 static_assert( !std::unsigned_integral<const unsigned&> );
  60 static_assert( !std::unsigned_integral<unsigned[]> );
  61 static_assert( !std::unsigned_integral<unsigned[2]> );
  62 static_assert( !std::unsigned_integral<unsigned()> );
  63 static_assert( !std::unsigned_integral<unsigned(*)()> );
  64 static_assert( !std::unsigned_integral<unsigned(&)()> );
  65
  66 enum E { };
  67 static_assert( !std::unsigned_integral<E> );
  68 enum class CE { };
  69 static_assert( !std::unsigned_integral<CE> );
  70 struct A { };
  71 static_assert( !std::unsigned_integral<A> );
  72 union B { };
  73 static_assert( !std::unsigned_integral<B> );