[antlr-interest] ANTLR3 AST construction withoptionsandalternatives

[Foolish Ewe]

Thanks Kay:

That is very helpful, good notation is like clean living, a good, helpful 
and sometimes necessary
thing :-).

Currently I am thinking about what sort of semantic processing my language 
needs.
Since the AST is "walked" during tree construction, I'm hoping to complete 
any needed
processing during the initial construction phase, however until I start 
trying stuff, I'm not
sure if I will be so lucky.  In the event that I might need to walk
part of the tree after construction, am I right that this is typically done 
in Java
(based on what I noticed 
at:http://www.antlr.org/wiki/pages/viewpage.action?pageId=754) ,
or does ANTLR have a grammar for traversing the AST after construction as 
well?

Regards:

Bill M.


Kay Roepke wrote on November 14, 2006
>On 13. Nov 2006, at 21:24 , David Holroyd wrote:
>
>>On Mon, Nov 13, 2006 at 06:40:05PM +0000, Foolish Ewe wrote:
>>>I'm not sure about what the ANTLR folks call these things so just
>>>to be clear, if we have a rule like the one I originally suggested,
>>>b and c+ are what I'll call atributes.  I'm guessing that Dave

>>>refers to the + suffix as the cardinality of the attribute.
>>
>>Yes.  (I hope it's the right term.)
>
>Don't call them attributes, that term is used for something different.
>They are called rule or token references (depending whether you write  a+ 
>or A+).
>Attributes are "fields" of those references, like $a.text and the like.
>Also, parameters, return values, and scope "fields" are also called  
>attributes
>(since they are essentially the same thing).
>As such, there are predefined attributes (text, start, stop, line, st  come 
>to mind)
>and "user defined" attributes, though I think we don't have a  qualifier 
>like that,
>they are just "attributes".
>
>Hope that clears that up :)
>
>cheers,
>-k
>--
>Kay Röpke
>http://classdump.org/
>
>
>
>

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