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Optimized Version
Possible Problem
This, however, does not always work:
[ BinDigit ] BinDigit
{ BinDigit } BinDigit
Number | Number "." Number
Q: Can you find equivalent expressions, that do not have the problem?
These problem can always be resolved for regular expressions.
We cannot solve them in general, if the grammar has recursion.
Christoph Zenger
3/23/2000