DecrParser.java

public class DecrParser extends Unary {

    public DecrParser() {
        super("decr");
    }


    @Override
    public void _execute() throws OperationError {
        setNewValue(getInterpreter().executeDecr(getVariable()));
    }

    @Override
    public String getChangeMessage() {
        return "Decremented " + getVariableString(getVariable()) + "to " + getNewValue();
    }
}