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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <functional>
// class function<R(ArgTypes...)>
// template<typename T>
// requires Callable<T, ArgTypes...> && Convertible<Callable<T, ArgTypes...>::result_type, R>
// T*
// target();
// template<typename T>
// requires Callable<T, ArgTypes...> && Convertible<Callable<T, ArgTypes...>::result_type, R>
// const T*
// target() const;
// This test runs in C++03, but we have deprecated using std::function in C++03.
// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
// UNSUPPORTED: no-rtti
#include <functional>
#include <new>
#include <cstdlib>
#include <cassert>
#include "test_macros.h"
class A
{
int data_[10];
public:
static int count;
A()
{
++count;
for (int i = 0; i < 10; ++i)
data_[i] = i;
}
A(const A&) {++count;}
~A() {--count;}
int operator()(int i) const
{
for (int j = 0; j < 10; ++j)
i += data_[j];
return i;
}
int foo(int) const {return 1;}
};
int A::count = 0;
int g(int) {return 0;}
int main(int, char**)
{
{
std::function<int(int)> f = A();
assert(A::count == 1);
assert(f.target<A>());
assert(f.target<int(*)(int)>() == 0);
assert(f.target<int>() == nullptr);
}
assert(A::count == 0);
{
std::function<int(int)> f = g;
assert(A::count == 0);
assert(f.target<int(*)(int)>());
assert(f.target<A>() == 0);
assert(f.target<int>() == nullptr);
}
assert(A::count == 0);
{
const std::function<int(int)> f = A();
assert(A::count == 1);
assert(f.target<A>());
assert(f.target<int(*)(int)>() == 0);
assert(f.target<int>() == nullptr);
}
assert(A::count == 0);
{
const std::function<int(int)> f = g;
assert(A::count == 0);
assert(f.target<int(*)(int)>());
assert(f.target<A>() == 0);
assert(f.target<int>() == nullptr);
}
assert(A::count == 0);
return 0;
}
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