struct inputfieldsptr {
	x::ptr_cast<x::w::input_field> subject;
	x::ptr_cast<x::w::input_field> text;

	inline void validate_or_throw_exception() const
	{
		if (!subject) validation_failed("subject");
		if (!text) validation_failed("text");
	}

	static inline void validation_failed(const char *object_name)
			__attribute__((noreturn))
	{
		throw EXCEPTION("Internal error: object \"" << object_name
				<< "\" was not created.");
	}
};

struct inputfields {
	x::w::input_field subject;
	x::w::input_field text;

	inputfields(const inputfieldsptr &p)
	: subject(p.subject),
	  text(p.text)
	{}
};