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// { dg-do run { 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/>.
// 8.2.1 Class template shared_ptr [memory.smartptr.shared]
#include <experimental/memory>
#include <testsuite_hooks.h>
int destroyed = 0;
struct A : std::experimental::enable_shared_from_this<A>
{
~A() { ++destroyed; }
};
struct B : A { };
// 8.2.1.1 shared_ptr constructors [memory.smartptr.shared.const]
// Construction from unique_ptr<A[]>
template<typename From, typename To>
constexpr bool constructible()
{
using std::experimental::shared_ptr;
using std::experimental::is_constructible_v;
using std::unique_ptr;
return is_constructible_v<shared_ptr<To>, unique_ptr<From>>;
}
static_assert( constructible< A, A >(), "A -> A compatible" );
static_assert( !constructible< A, A[] >(), "A -> A[] not compatible" );
static_assert( !constructible< A, A[1] >(), "A -> A[1] not compatible" );
static_assert( !constructible< A[], A >(), "A[] -> A not compatible" );
static_assert( constructible< A[], A[] >(), "A[] -> A[] compatible" );
static_assert( !constructible< A[], A[1] >(), "A[] -> A[1] not compatible" );
static_assert( constructible< B, A >(), "B -> A compatible" );
static_assert( !constructible< B, A[] >(), "B -> A[] not compatible" );
static_assert( !constructible< B, A[1] >(), "B -> A[1] not compatible" );
static_assert( !constructible< B[], A >(), "B[] -> A not compatible" );
static_assert( !constructible< B[], A[] >(), "B[] -> A[] not compatible" );
static_assert( !constructible< B[], A[1] >(), "B[2] -> A[1] not compatible" );
void
test01()
{
std::unique_ptr<A> up(new A);
std::experimental::shared_ptr<A> sp(std::move(up));
VERIFY( up.get() == 0 );
VERIFY( sp.get() != 0 );
VERIFY( sp.use_count() == 1 );
VERIFY( sp->shared_from_this() != nullptr );
sp.reset();
VERIFY( destroyed == 1 );
destroyed = 0;
}
void
test02()
{
std::unique_ptr<A[]> up(new A[5]);
std::experimental::shared_ptr<A[]> sp(std::move(up));
VERIFY( up.get() == 0 );
VERIFY( sp.get() != 0 );
VERIFY( sp.use_count() == 1 );
bool caught = false;
try
{
sp[0].shared_from_this(); // should not be set for arrays
}
catch (const std::bad_weak_ptr&)
{
caught = true;
}
VERIFY( caught );
sp.reset();
VERIFY( destroyed == 5 );
}
int
main()
{
test01();
test02();
}
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