Method toPredicate

src/ExtOperator.actor.cpp:147–150

struct ExtValueOperatorSize {
	static const char* name;
	static Reference<IPredicate> toPredicate(std::string const& unencoded_path, bson::BSONElement const& element) {
		return ref(new AnyPredicate(ref(new ExtPathExpression(unencoded_path, false, false)),
		                            ref(new ArraySizePredicate(element.Number()))));
	}
};
REGISTER_VALUE_OPERATOR(ExtValueOperatorSize, "$size");