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

   1 // Copyright (C) 2019-2023 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::movable<int> );
  24 static_assert( std::movable<int*> );
  25 static_assert( ! std::movable<int&> );
  26 static_assert( ! std::movable<void> );
  27 static_assert( ! std::movable<void()> );
  28 static_assert( ! std::movable<void() noexcept> );
  29 static_assert( ! std::movable<void() const> );
  30
  31 struct Trivial { };
  32 static_assert( std::movable<Trivial> );
  33
  34 struct NotTrivial
  35 {
  36   NotTrivial(int) { }
  37   NotTrivial(NotTrivial&&) { }
  38   NotTrivial& operator=(NotTrivial&&) { return *this; }
  39   ~NotTrivial() { }
  40 };
  41 static_assert( std::movable<NotTrivial> );
  42
  43 namespace N1
  44 {
  45   struct Immovable
  46   {
  47     Immovable() = default;
  48     Immovable(Immovable&&) = delete;
  49   };
  50 }
  51 static_assert( ! std::movable<N1::Immovable> );
  52
  53 namespace N2
  54 {
  55   struct Swappable
  56   {
  57     Swappable() = default;
  58     Swappable(Swappable&&) = delete;
  59     Swappable& operator=(Swappable&&) = default;
  60     friend void swap(Swappable&, Swappable&) { }
  61   };
  62 }
  63 static_assert( ! std::movable<N2::Swappable> );
  64
  65 struct NotAssignable
  66 {
  67   NotAssignable() = default;
  68   NotAssignable(NotAssignable&&) = default;
  69   NotAssignable& operator=(NotAssignable&&) = delete;
  70   friend void swap(NotAssignable&, NotAssignable&) { }
  71 };
  72 static_assert( ! std::movable<NotAssignable> );
  73
  74 struct NotSwappable
  75 {
  76   NotSwappable() = default;
  77   NotSwappable(NotSwappable&&) = default;
  78   NotSwappable& operator=(NotSwappable&&) = default;
  79 };
  80 void swap(NotSwappable&, NotSwappable&) = delete;
  81 static_assert( std::movable<NotSwappable> ); // ranges::swap still works!