Good. But now I feel bad. I want to qualify my statement about HOP::Lexer being slow (which is a relative statement). It is much faster than some alternatives but is much slower than lexing by hand (as shown above). I found that, in my grammars, lexing by hand was 10 times faster. That is not because HOP::Lexer is bad, but because it has to contend with streams, a feature that makes it much more powerful then lexing by hand, but completely unnecessary for what we are doing here.

HOP::Lexer and High Order Perl are good products!

Ted Young

It is almost impossible for me to read contemporary mathematicians who, instead of saying "Petya washed his hands," write simply: "There is a t1 < 0 such that the image of t1 under the natural mapping t1 -> Petya(t1) belongs to the set of dirty hands, and a t2, t1 < t2 <= 0, such that the image of t2 under the above-mentioned mapping belongs to the complement of the set defined in the preceding sentence."
The Russian mathematician V. I. Arnol'd

In reply to Re^3: How to parse a limited grammar by TedYoung
in thread How to parse a limited grammar by clinton

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