Re: Speed of lex generated scanners???

michi@km21.zfe.siemens.de (Michael Klug)
Wed, 1 Jun 1994 13:24:56 GMT

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Newsgroups: comp.compilers
From: michi@km21.zfe.siemens.de (Michael Klug)
Keywords: lex, performance
Organization: Siemens AG, Munich
References: 94-05-114 94-05-133
Date: Wed, 1 Jun 1994 13:24:56 GMT

> You may want to look at the Cocktail compiler suite.


> Ask archie for one of: rex, lalr, ell, ag, ast, cg, estra. Rex is the
> lexing tool


rex is not only much, much faster than lex, rex provides everything which
lex just promises. Just try to build a lexer with a lookahead, a complete
structured token (not only a single character). lex's generator tables
will explode. Josef Grosch developed the technique called tunnel automaton
which is used in rex. There are several papers about this technique.


-Mike
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