package runEnv;

public abstract class RunValue {


/*
Represents a run time value
*/

	public int intValue() {
		throw new Error( "Can't cast runtime value to int" );
		}

	public char charValue() {
		throw new Error( "Can't cast runtime value to char" );
		}

	public double realValue() {
		throw new Error( "Can't cast runtime value to real" );
		}

	public boolean boolValue() {
		throw new Error( "Can't cast runtime value to bool" );
		}

	public String stringValue() {
		return toString();
		}

	public ArrayValue arrayValue() {
		throw new Error( "Can't cast runtime " + this + " to array" );
		}

	public InstanceValue instanceValue() {
		throw new Error( "Can't cast runtime " + this + " to instance" );
		}

	public RunData dataValue() {
		throw new Error( "Can't cast runtime " + this + " to reference" );
		}

	public abstract String toString();
	
	public static String toString( RunValue value ) {
		if ( value == null )
			return "null";
		else
			return value.toString();
		}

	}