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Maximum number of rules in PetitParser?

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jgfoster

Dec 22, 2014; 5:16am

Maximum number of rules in PetitParser?

351 posts

I have a grammar with about 600 rules. With some work I’ve come up with a useful subset of 400 rules. Unfortunately this is still more than the 255 number of instance variables that Pharo allows. Is there a way to have PetitParser use something other than instance variables to cache the rules? Especially something that works with PPBrowser?

James

Tudor Girba-2

Dec 22, 2014; 9:08am

Re: Maximum number of rules in PetitParser?

7411 posts

One non-ideal solution is to split the parser into several classes inheriting from each other.

Doru

On Mon, Dec 22, 2014 at 6:26 AM, James Foster <[hidden email]> wrote:

I have a grammar with about 600 rules. With some work I’ve come up with a useful subset of 400 rules. Unfortunately this is still more than the 255 number of instance variables that Pharo allows. Is there a way to have PetitParser use something other than instance variables to cache the rules? Especially something that works with PPBrowser?

James

www.tudorgirba.com

"Every thing has its own flow"

Udo Schneider

Dec 22, 2014; 10:27am

Re: Maximum number of rules in PetitParser?

667 posts

In reply to this post by jgfoster

James,

can you split the grammar into logical subgrammars? If yes PetitParser's
"dependent grammars"
(http://pharobooks.gforge.inria.fr/PharoByExampleTwo-Eng/latest/PetitParser.pdf#page=12)
might be helpful.

CU,

Udo

On 22/12/14 06:26, James Foster wrote:
> I have a grammar with about 600 rules. With some work I’ve come up with a useful subset of 400 rules. Unfortunately this is still more than the 255 number of instance variables that Pharo allows. Is there a way to have PetitParser use something other than instance variables to cache the rules? Especially something that works with PPBrowser?
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> James
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