building a lexer generator

mips@cyberspace.org
29 Nov 2006 11:07:24 -0500

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building a lexer generator mips@cyberspace.org (2006-11-29)
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From: mips@cyberspace.org
Newsgroups: comp.compilers
Date: 29 Nov 2006 11:07:24 -0500
Organization: Compilers Central
Keywords: lex, design, question

Hi,


I'M Trying To Build A Lexer Generator But I'Ve Only Been Hand Coded
Lexer Before So I'M A Bit Stuck On The Design Side.


I've already done searches on the various steps needed to build such
tools but i still miss some points. For example, when i have five
keywords and one identifier definition how do the lexer process them ?
Does it have a DFA for each keywords and the identifier or does it
process all with the same FSM ? I would bet on the second one but
this mean that i must merge all the DFA (or i surely missed
something).


I'll accept gladly any URL that sounds like "lexer generators for
dummies".


Thanks,
Damien
[Flex makes one big merged DFA. -John]



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