libstdc++-v3/testsuite/experimental/memory/observer_ptr/requirements.cc

   1 // { dg-options "-std=gnu++14" }
   2 // { dg-do compile }
   3
   4 // Copyright (C) 2015-2016 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a moved_to of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 #include <experimental/memory>
  22
  23 using std::experimental::observer_ptr;
  24
  25 struct nontrivial {nontrivial() {}};
  26 struct other {};
  27 struct base {};
  28 struct derived : base {};
  29
  30 static_assert(!std::is_trivially_constructible<
  31               observer_ptr<nontrivial>>::value, "");
  32 static_assert(std::is_trivially_copyable<
  33               observer_ptr<nontrivial>>::value, "");
  34 static_assert(std::is_trivially_destructible<
  35               observer_ptr<nontrivial>>::value, "");
  36
  37 static_assert(std::is_constructible<
  38               observer_ptr<nontrivial>, nontrivial*>::value,
  39               "");
  40 static_assert(std::is_constructible<observer_ptr<base>, base*>::value, "");
  41 static_assert(std::is_constructible<observer_ptr<base>, derived*>::value, "");
  42 static_assert(!std::is_constructible<observer_ptr<base>, other*>::value, "");
  43 static_assert(std::is_constructible<
  44                 observer_ptr<base>, observer_ptr<base>>::value, "");
  45 static_assert(std::is_constructible<
  46                 observer_ptr<base>, observer_ptr<derived>>::value, "");
  47 static_assert(!std::is_constructible<
  48                 observer_ptr<base>, observer_ptr<other>>::value, "");
  49
  50 static_assert(!std::is_assignable<
  51               observer_ptr<nontrivial>, nontrivial*>::value,
  52               "");
  53 static_assert(std::is_assignable<
  54               observer_ptr<nontrivial>, observer_ptr<nontrivial>>::value,
  55               "");
  56 static_assert(std::is_assignable<observer_ptr<base>,
  57               observer_ptr<base>>::value, "");
  58 static_assert(std::is_assignable<observer_ptr<base>,
  59               observer_ptr<derived>>::value, "");
  60 static_assert(!std::is_assignable<
  61                 observer_ptr<base>, observer_ptr<other>>::value, "");
  62 static_assert(std::is_assignable<observer_ptr<const int>,
  63               observer_ptr<int>>::value, "");
  64 static_assert(!std::is_assignable<observer_ptr<int>,
  65               observer_ptr<const int>>::value, "");