[antlr-interest] Exception tests eat performance?

[Terence Parr]

On Wednesday, January 7, 2004, at 10:44  AM, Karl Meissner wrote:

>
> --- Terence Parr <parrt at cs.usfca.edu> wrote:
>> Hi gang, my only additional comment would be that using return values
>> makes it pretty hard to have other return values from a rule, which 
>> are
>> arguably very handy.
>
> Which is why I used in my  psuedo code ;-)
>
> But fine, I used returned values in my rules all the time too.
> The traditional alternatives to a return value are
>
> 1) reference parameters

They don't work for primitives in Java unfortunately.

> 2) Sticking the result into some globally accessable place such as a 
> member.

Can make recursion tricky.

>   Results could even
> be held in a stack, equivlent to inputState.guessing.

But a bit slower, though workable.  I've considered this for ANTLR 3.

Thanks for the suggestions :)

Ter
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