OutArg.cpp

template <typename T>
struct OutArg {

	T * operator ->() const
	{
		return &_t;
	}
	T & operator*() const
	{
		return _t;
	}
	operator T&() const
	{
		return _t;
	}

	OutArg(T & t) : _t(t) {}

private:
	T & _t;
	OutArg(OutArg&) = delete;
};

namespace detail {
struct OutArgConstructor
{
	template <typename T>
	OutArg<T> & operator^(OutArg<T> & t)
	{
		return t;
	}

	template <typename T>
	OutArg<T> operator^(T & t)
	{
		return OutArg(t);
	}
};
};


#define out_ detail::OutArgConstructor{} ^