Java lib for parsing and evaluating simple math expressions, using fractions. This was a seminar project in a Programming class. It is not very useful, but works
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rcalc/src/net/mightypork/rcalc/tokens/TokenParenthesisLeft.java

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package net.mightypork.rcalc.tokens;
import net.mightypork.rcalc.IToken;
import net.mightypork.rcalc.TokenList;
/**
* Left parenthesis token
*
* @author Ondrej Hruska
*/
public class TokenParenthesisLeft implements IToken {
@Override
public String toString() {
return "(";
}
@Override
public TokenList wrapInTokenList() {
throw new RuntimeException("Cannot wrap a parenthesis in a TokenList!");
}
}