[antlr-interest] classHeaderSuffix in ANTLR v3?

[Jeremy D. Frens]

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Terence Parr wrote:
>
> On Mar 26, 2007, at 5:46 PM, Jeremy D. Frens wrote:
>
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>> I'm translating a second ANTLR grammar from v2 to v3, this one a
>> transliteration.  I'm looking for the equivalent for the
>> "classHeaderSuffix" option in v3.  (It's used to specify an interface
>> for the lexer or parser.)  I've searched the wiki and the beta book, but
>> I can't find anything to specify an *interface*.
>>
>
> Ack. Not defined in v3.  Can you subclass and implement interface?

Actually, as it turns out, the ultimate reason my interface existed was
to guarantee a "nextToken()" method.  So by returning a TokenSource
instead, I made my code happy.

Ultimately, though, I think I may want to be able to specify interfaces
in the future.  I also think I want to be able to inject behaviors into
a class (without subclassing), but I need to think more about this.
(This thinking revolves around my new ANTLR Testing library for ANTLR
v3.)  For now, I'd probably rate my classHeaderSuffix-request around a
"please, if you could" with the option to raise my pleading. *smile*

jdf

- --
* Jeremy D. Frens * Professor, Computer Science * jdfrens at calvin.edu *
     ``Oh yeah!  Oh yeah!  Oh yeah!''  -- ZZ Top, "Cheap Sunglasses"

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