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// Copyright (C) 2017 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-options "-std=gnu++17" }
// { dg-do compile { target c++17 } }
#include <functional>
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::function func1 = f0v;
check_type<std::function<void()>>(func1);
std::function func2 = f0vn;
check_type<std::function<void()>>(func2);
std::function func3 = f0i;
check_type<std::function<int()>>(func3);
std::function func4 = f0in;
check_type<std::function<int()>>(func4);
std::function func5 = f1l;
check_type<std::function<long(int&)>>(func5);
std::function func6 = f1ln;
check_type<std::function<long(double*)>>(func6);
std::function func5a = func5;
check_type<std::function<long(int&)>>(func5a);
std::function func6a = func6;
check_type<std::function<long(double*)>>(func6a);
}
struct X {
int operator()(const short&, void*);
};
struct Y {
void operator()(int) const & noexcept;
};
void
test02()
{
X x;
std::function func1 = x;
check_type<std::function<int(const short&, void*)>>(func1);
Y y;
std::function func2 = y;
check_type<std::function<void(int)>>(func2);
std::function func3 = [&x](float) -> X& { return x; };
check_type<std::function<X&(float)>>(func3);
}
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