[antlr-interest] Re: trees with payloads??
John D. Mitchell
johnm-antlr at non.net
Thu Nov 11 20:30:26 PST 2004
>>>>> "lgcraymer" == lgcraymer <lgc at mail1.jpl.nasa.gov> writes:
>>>>>> In antlr-interest at yahoogroups.com, "John D. Mitchell"
[...]
>> I think you're talking about my demand, ahem :-), that there be a
>> standard slot for a set of dynamic attributes. The actual set would
>> only be created if needed so the only required overhead is the
>> reference/pointer.
> We part company here. I can see that as part of an AST library facility
> (use this if you want to), but not as a default. It adds a library
> requirement for Hashmap which complicates porting.
IMNSHO, the dynamic attributes support is a fundamental feature of Antlr
v3.
> On the other hand, if that requirement were added, I'd be willing to see
> syntactic support for symbol table manipulation in ANTLR--that would be a
> relatively small next step.
Hmm... Adding some stack support to the dynamic attribute stuff is a no
brainer but what sort of syntactic support are you thinking of?
Take care,
John
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