[antlr-interest] "protected" lexer rules

[Terence Parr]

On Nov 7, 2004, at 3:17 PM, John D. Mitchell wrote:
>> Ick.  So, should it be an option or keyword?
>
> Since the concept is fundamental to the nature of those types of 
> rules, I
> think it has to be a keyword.

Makes sense.

>> What would the name be?  I can't even describe it exactly even in two
>> words. :(
>
>> "non token"?  "method"?  "macro"?  "internal"?
>
> Their only purpose for existence is to provide a single definition of a
> (sub-)structure of (perhaps many) token(s), right?  So, they are really
> just "shorthand" (rules).

Yes, common substructure with optional actions; e.g., DIGIT might 
compute a value from the char.

So, "shared", "isolated", "common", "sub"?

perhaps there is a different "section"; one for regular rules and then 
one for these shared rules?

Ter
--
CS Professor & Grad Director, University of San Francisco
Creator, ANTLR Parser Generator, http://www.antlr.org
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