Foundations of Software - LAMP - EPFL

Arithmetic Expressions Again
Here is the full parser for arithmetic expressions:
object Arithmetic extends StandardTokenParsers {
lexical.delimiters ++= List(”(”, ”)”, ”+”, ”−”, ”∗”, ”/”)
def expr : Parser[Any] = term ˜ rep(”+” ˜ term | ”−” ˜ term)
def term = factor ˜ rep(”∗” ˜ factor | ”/” ˜ factor)
def factor : Parser[Any] = ”(” ˜ expr ˜ ”)” | numericLit
Question: How can we make it evaluate the parsed expression?
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