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// { dg-do compile { target c++14 } }
// Copyright (C) 2015-2018 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include <experimental/memory>
using std::experimental::observer_ptr;
struct nontrivial {nontrivial() {}};
struct other {};
struct base {};
struct derived : base {};
static_assert(!std::is_trivially_constructible<
observer_ptr<nontrivial>>::value, "");
static_assert(std::is_trivially_copyable<
observer_ptr<nontrivial>>::value, "");
static_assert(std::is_trivially_destructible<
observer_ptr<nontrivial>>::value, "");
static_assert(std::is_constructible<
observer_ptr<nontrivial>, nontrivial*>::value,
"");
static_assert(std::is_constructible<observer_ptr<base>, base*>::value, "");
static_assert(std::is_constructible<observer_ptr<base>, derived*>::value, "");
static_assert(!std::is_constructible<observer_ptr<base>, other*>::value, "");
static_assert(std::is_constructible<
observer_ptr<base>, observer_ptr<base>>::value, "");
static_assert(std::is_constructible<
observer_ptr<base>, observer_ptr<derived>>::value, "");
static_assert(!std::is_constructible<
observer_ptr<base>, observer_ptr<other>>::value, "");
static_assert(!std::is_assignable<
observer_ptr<nontrivial>, nontrivial*>::value,
"");
static_assert(std::is_assignable<
observer_ptr<nontrivial>, observer_ptr<nontrivial>>::value,
"");
static_assert(std::is_assignable<observer_ptr<base>,
observer_ptr<base>>::value, "");
static_assert(std::is_assignable<observer_ptr<base>,
observer_ptr<derived>>::value, "");
static_assert(!std::is_assignable<
observer_ptr<base>, observer_ptr<other>>::value, "");
static_assert(std::is_assignable<observer_ptr<const int>,
observer_ptr<int>>::value, "");
static_assert(!std::is_assignable<observer_ptr<int>,
observer_ptr<const int>>::value, "");
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