[antlr-interest] how useful would a generic grammar "action" language be?

[Terence Parr]

On Tuesday, October 28, 2003, at 12:46 PM, Matt Benson wrote:

> Okay, also, Ter, you had mentioned using an ANTLR 3
> intermediate form for all kinds of goodies... I am
> trying to have an idea but I'm too dumb for it.  :)
>
> We know we have to retain a means of generating
> actions even when they are too complex to be specified
> in the "action language."  Does it make sense to have
> the concept of a target language-specific
> implementation of some kind of ANTLR event listener
> interface, where the specification is open enough not
> to be restricted to OO target languages?  I'm not sure
> what the events would consist of; possibly a string
> representation of the ANTLR intermediate form... or to
> bring the whole thing full circle, a
> target-language-specific representation of the
> intermediate form, generated according to the same
> principles as we are discussing overall?
>
> Does any of that make sense?

Not sure exactly what you're trying to get at, but all things will 
become clear as I try to implement something.  We could have two kinds 
of actions: generic antlr actions and language-specific actions.  Not 
sure that is a *good* thing, but it is possible.

Ter

>
> -Matt
>
>
> --- Oliver Zeigermann <oliver at zeigermann.de> wrote:
>> Terence Parr wrote:
>>> Yeah, I'm semi-skeptical but it's a nice dream.
>> Perhaps it will only
>>> be good for sem preds?
>>
>> For sure, because sem preds are part of the analysis
>> part of the
>> grammar. Maybe you could think of completly removing
>> all other synthesis
>> actions (except for sem preds and setting of
>> conditions for them of
>> course specified in your pseudo-language) from the
>> grammar and find
>> another way of specifying semantic actions outside
>> of it. I know sableCC
>> elaborated some concepts how to do this.
>> Unfortunately, I have no deeper
>> insight into this...
>>
>> Oliver
>>
>>
>>
>>
>>
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>
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