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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>
// void swap(function<R(ArgTypes...)>&, function<R(ArgTypes...)>&);
// UNSUPPORTED: asan, msan
#include <functional>
#include <new>
#include <cstdlib>
#include <cassert>
int new_called = 0;
void* operator new(std::size_t s) throw(std::bad_alloc)
{
++new_called;
return std::malloc(s);
}
void operator delete(void* p) throw()
{
--new_called;
std::free(p);
}
class A
{
int data_[10];
public:
static int count;
explicit A(int j)
{
++count;
data_[0] = j;
}
A(const A& a)
{
++count;
for (int i = 0; i < 10; ++i)
data_[i] = a.data_[i];
}
~A() {--count;}
int operator()(int i) const
{
for (int j = 0; j < 10; ++j)
i += data_[j];
return i;
}
int id() const {return data_[0];}
};
int A::count = 0;
int g(int) {return 0;}
int h(int) {return 1;}
int main()
{
assert(new_called == 0);
{
std::function<int(int)> f1 = A(1);
std::function<int(int)> f2 = A(2);
assert(A::count == 2);
assert(new_called == 2);
assert(f1.target<A>()->id() == 1);
assert(f2.target<A>()->id() == 2);
swap(f1, f2);
assert(A::count == 2);
assert(new_called == 2);
assert(f1.target<A>()->id() == 2);
assert(f2.target<A>()->id() == 1);
}
assert(A::count == 0);
assert(new_called == 0);
{
std::function<int(int)> f1 = A(1);
std::function<int(int)> f2 = g;
assert(A::count == 1);
assert(new_called == 1);
assert(f1.target<A>()->id() == 1);
assert(*f2.target<int(*)(int)>() == g);
swap(f1, f2);
assert(A::count == 1);
assert(new_called == 1);
assert(*f1.target<int(*)(int)>() == g);
assert(f2.target<A>()->id() == 1);
}
assert(A::count == 0);
assert(new_called == 0);
{
std::function<int(int)> f1 = g;
std::function<int(int)> f2 = A(1);
assert(A::count == 1);
assert(new_called == 1);
assert(*f1.target<int(*)(int)>() == g);
assert(f2.target<A>()->id() == 1);
swap(f1, f2);
assert(A::count == 1);
assert(new_called == 1);
assert(f1.target<A>()->id() == 1);
assert(*f2.target<int(*)(int)>() == g);
}
assert(A::count == 0);
assert(new_called == 0);
{
std::function<int(int)> f1 = g;
std::function<int(int)> f2 = h;
assert(A::count == 0);
assert(new_called == 0);
assert(*f1.target<int(*)(int)>() == g);
assert(*f2.target<int(*)(int)>() == h);
swap(f1, f2);
assert(A::count == 0);
assert(new_called == 0);
assert(*f1.target<int(*)(int)>() == h);
assert(*f2.target<int(*)(int)>() == g);
}
assert(A::count == 0);
assert(new_called == 0);
}
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