/********************* Addition ****************************/
private static IntegerExpression Evaluate(IntegerExpression op1, AdditionOperator op, IntegerExpression op2)
{
return(new IntegerExpression(op1.Value + op2.Value));
}
private static DoubleExpression Evaluate(DoubleExpression op1, AdditionOperator op, DoubleExpression op2)
{
return(new DoubleExpression(op1.Value + op2.Value));
}
