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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <functional>
// class function<R(ArgTypes...)>
// template <MoveConstructible R, MoveConstructible ... ArgTypes>
// bool operator==(const function<R(ArgTypes...)>&, nullptr_t);
//
// template <MoveConstructible R, MoveConstructible ... ArgTypes>
// bool operator==(nullptr_t, const function<R(ArgTypes...)>&);
//
// template <MoveConstructible R, MoveConstructible ... ArgTypes>
// bool operator!=(const function<R(ArgTypes...)>&, nullptr_t);
//
// template <MoveConstructible R, MoveConstructible ... ArgTypes>
// bool operator!=(nullptr_t, const function<R(ArgTypes...)>&);
#include <functional>
#include <cassert>
int g(int) {return 0;}
int main()
{
{
std::function<int(int)> f;
assert(f == nullptr);
assert(nullptr == f);
f = g;
assert(f != nullptr);
assert(nullptr != f);
}
}
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