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package net.sven_eisenhauer.swa_prakt1;
public class EvalIter implements ExpIter {
@Override
public Number traverse(ArithmeticExpression exp) {
if(exp instanceof ArithmeticVariable) {
return ((ArithmeticVariable) exp).getValue();
} else {
ArithmeticOperation actOp = (ArithmeticOperation) exp;
Number leftVal = traverse(actOp.getLeftOperand());
Number rightVal = traverse(actOp.getRightOperand());
return actOp.doOperation(leftVal, rightVal);
}
}
}
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