Method match

src/main/java/wycc/util/AbstractItem.java:154–162

(Class<S> kind)

	}

	public <S extends Item> S match(Class<S> kind) {
		for (int i = 0; i != size(); ++i) {
			Item operand = operands[i];
			if (kind.isInstance(operand)) {
				return (S) operand;
			}
		}
		return null;
	}

	@Override
	public int hashCode() {