libstdc++-v3/testsuite/std/concepts/concepts.object/semiregular.cc

   1 // Copyright (C) 2019 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 static_assert( std::semiregular<int> );
  24 static_assert( std::semiregular<int*> );
  25 static_assert( ! std::semiregular<int&> );
  26 static_assert( ! std::semiregular<void> );
  27 static_assert( ! std::semiregular<void()> );
  28 static_assert( ! std::semiregular<void() noexcept> );
  29 static_assert( ! std::semiregular<void() const> );
  30
  31 struct Trivial { };
  32 static_assert( std::semiregular<Trivial> );
  33
  34 struct NotTrivial
  35 {
  36   NotTrivial() { }
  37   ~NotTrivial() { }
  38 };
  39 static_assert( std::semiregular<NotTrivial> );
  40
  41 struct NotDefaultConstructible
  42 {
  43   NotDefaultConstructible(int) { }
  44 };
  45 static_assert( ! std::semiregular<NotDefaultConstructible> );
  46
  47 struct HasReference
  48 {
  49   int& ref;
  50 };
  51 static_assert( ! std::semiregular<HasReference> );