[antlr-interest] How to implement a "require" mechanism?

[Michael Matera]

Hi Sebastien,

I think your visited file table is a perfectly good solution.  I'm 
pretty sure that my parser will go into an infinite loop when that 
happens.  I should fix that.

Cheers
./m


� wrote:
> Le 12 nov. 2010 � 18:36, Michael Matera a �crit :
> 
>> Hi Sebastien,
>>
>> There's an ANTLR wiki entry that shows how to do this:
>>
>>> http://www.antlr.org/wiki/pages/viewpage.action?pageId=557057
>> It works by inserting tokens into your token stream which has the effect 
>> of generating an AST at the point of the require.
> 
> The last code snippet perfectly fits my need. It's a shame that I don't use the "include" keyword when I googled my problem.
> 
> 
> However, another simple question: How to handle properly cyclic inclusions?  I basically use a "visitedFile" table declared as a parser member. When I start the 'sub-parser', I set its visited table to the current one. And after the end of the sub-parse, I set mine to the one available in the sub-parser. 
> 
> Is there another solution? Mine looks like a hack :S
> 
> Cheers, 
> 
> --
>  S�bastien Mosser
>  http://sebastien-mosser.fr
> 
> 
> 
> 
> 

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