Re: parser generator terminology

Hans Aberg <haberg_20080406@math.su.se>
Mon, 07 Sep 2009 09:16:23 +0200

          From comp.compilers
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From: Hans Aberg <haberg_20080406@math.su.se>
Newsgroups: comp.compilers
Date: Mon, 07 Sep 2009 09:16:23 +0200
Organization: A noiseless patient Spider
References: 09-09-038 09-09-039
Keywords: parse, theory
Posted-Date: 07 Sep 2009 06:50:14 EDT

Michiel wrote:
>> 1) Is there a name for the definition of the set of tokens; preferably
>> a short name useful for naming identifiers? (I do not like regular
>> definition since it implies a set of rules I do not follow.)
>
> Not that I know of. What about 'vocabulary'?


In Waite & Goos, the vocabulary V is the (disjoint) union of the sets of
non-terminals and terminals. They first defines ageneral rewriting
system, with sentences members of V*, the set of finite strings (the
free monoid) of V.


One might call non-terminals "(grammar or syntactic) variables", and
terminals "(grammar or syntactic) constants"; a joint name for both
might be "symbols" (or we decided in Bison I think).


      Hans


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