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/*
Copyright 2007 Tobias Schwinger
Copyright 2019 Glen Joseph Fernandes
(glenjofe@gmail.com)
Distributed under the Boost Software License, Version 1.0.
(http://www.boost.org/LICENSE_1_0.txt)
*/
#include <boost/functional/factory.hpp>
#include <boost/core/lightweight_test.hpp>
#include <boost/smart_ptr/shared_ptr.hpp>
class sum {
public:
sum(int a, int b)
: value_(a + b) { }
int get() const {
return value_;
}
private:
int value_;
};
template<class T>
class creator {
public:
static int count;
typedef T value_type;
typedef T* pointer;
template<class U>
struct rebind {
typedef creator<U> other;
};
creator() { }
template<class U>
creator(const creator<U>&) { }
T* allocate(std::size_t size) {
++count;
return static_cast<T*>(::operator new(sizeof(T) * size));
}
void deallocate(T* ptr, std::size_t) {
--count;
::operator delete(ptr);
}
};
template<class T>
int creator<T>::count = 0;
template<class T, class U>
inline bool
operator==(const creator<T>&, const creator<U>&)
{
return true;
}
template<class T, class U>
inline bool
operator!=(const creator<T>&, const creator<U>&)
{
return false;
}
int main()
{
int a = 1;
int b = 2;
{
boost::shared_ptr<sum> s(boost::factory<boost::shared_ptr<sum>,
creator<void>,
boost::factory_alloc_for_pointee_and_deleter>()(a, b));
BOOST_TEST(creator<sum>::count == 1);
BOOST_TEST(s->get() == 3);
}
BOOST_TEST(creator<sum>::count == 0);
{
boost::shared_ptr<sum> s(boost::factory<boost::shared_ptr<sum>,
creator<void>,
boost::factory_passes_alloc_to_smart_pointer>()(a, b));
BOOST_TEST(creator<sum>::count == 1);
BOOST_TEST(s->get() == 3);
}
BOOST_TEST(creator<sum>::count == 0);
return boost::report_errors();
}
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