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[cdt-dev] Objective-C (was: How to extend the C99 / GCC LR Parser)
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Hi Markus,
Any thoughts about handling Objective-C this way, or is it just too big a change? There is interest in the community to pursue it, how would you recommend they proceed?
Thanks,
Doug.
> -----Original Message-----
> From: cdt-dev-bounces@xxxxxxxxxxx [mailto:cdt-dev-bounces@xxxxxxxxxxx]
> On Behalf Of Schorn, Markus
> Sent: Friday, July 08, 2011 2:22 AM
> To: CDT General developers list.
> Subject: Re: [cdt-dev] How to extend the C99 / GCC LR Parser
>
> Hi Sebastian,
> While extending the parser is a valid option, it will be much easier, if you
> manage to configure the existing parser.
> Clearly, it is not possible to handle every language extension in that way, but
> it may work in your case.
> For instance, depending on what __data16 does, I would try to map it to
> either 'short' or to the empty token.
>
> To configure the existing parser you need to subclass GCCLanguage and
> provide a customized IScannerExtensionConfiguration and/or
> ICParserExtensionConfiguration.
>
> Markus.
>
> -----Original Message-----
> From: cdt-dev-bounces@xxxxxxxxxxx [mailto:cdt-dev-bounces@xxxxxxxxxxx]
> On Behalf Of Sebastian Wagner
> Sent: Thursday, July 07, 2011 17:11
> To: cdt-dev@xxxxxxxxxxx
> Subject: [cdt-dev] How to extend the C99 / GCC LR Parser
> Importance: Low
>
> Hello all,
>
> I am working on a parser for a C based language which contains some small
> extensions, e.g. special type qualifiers. Therefore I would like to extend the
> C99 or GCC LR Parser.
>
> I read a lot of content in the web and CDT source code. I managed to
> generate the Parser from the grammar file and I'm able to compile the
> generated files. I also understood that today the lexer is not generated using
> the LPG, but is a part of the preprocessor.
>
> Now, nevertheless I didn't get the complete overview where I need to do
> changes if for instance I want to add a new type qualifier "__data16". Do I
> have to do modifications on the preprocessor and do I do that? I think
> keywords can be added using the ScannerExtensionConfiguration, but I don't
> know how to do this correctly. Do I also need to do adaptations to the AST?
>
> It would be great if one of you could give me a short overview in which
> modules I need to do modifications, so that I understand the behavior
> better.
>
> Thanks in advance!!
>
>
> Sebastian Wagner
>
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