package rpn.basic;
import rpn.Calculator;

public class StringItem extends Item {
	String s;
	
	public StringItem(Calculator ca, String s) {
		super(ca);
		this.s = s;
	}
	
	public Item plus(Item it) {
		if (it instanceof StringItem) {
			return(new StringItem(ca, s + ((StringItem) it).s));
		} else {
			return(new StringItem(ca, s + it.toString()));
		}
	}
	
	public String toString() {
		return(s);
	}
}