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// // Copyright (C) 2017-2022 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/>.
// { dg-do compile { target c++17 } }
#include <future>
template<typename T, typename U> struct require_same;
template<typename T> struct require_same<T, T> { using type = void; };
template<typename T, typename U>
typename require_same<T, U>::type
check_type(U&) { }
void f0v();
void f0vn() noexcept;
int f0i();
int f0in() noexcept;
long f1l(int&);
long f1ln(double*) noexcept;
void
test01()
{
std::packaged_task task1{f0v};
check_type<std::packaged_task<void()>>(task1);
std::packaged_task task2{f0vn};
check_type<std::packaged_task<void()>>(task2);
std::packaged_task task3{f0i};
check_type<std::packaged_task<int()>>(task3);
std::packaged_task task4{f0in};
check_type<std::packaged_task<int()>>(task4);
std::packaged_task task5{f1l};
check_type<std::packaged_task<long(int&)>>(task5);
std::packaged_task task6{f1ln};
check_type<std::packaged_task<long(double*)>>(task6);
std::packaged_task task5a{std::move(task5)};
check_type<std::packaged_task<long(int&)>>(task5a);
std::packaged_task task6a{std::move(task6)};
check_type<std::packaged_task<long(double*)>>(task6a);
}
struct X {
int operator()(const short&, void*);
};
struct Y {
void operator()(int) const & noexcept;
};
void
test02()
{
X x;
std::packaged_task task1{x};
check_type<std::packaged_task<int(const short&, void*)>>(task1);
Y y;
std::packaged_task task2{y};
check_type<std::packaged_task<void(int)>>(task2);
std::packaged_task task3{[&x](float) -> X& { return x; }};
check_type<std::packaged_task<X&(float)>>(task3);
}
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