[Rprotobuf-yada] make prototypes of message , field extraction

[Romain François]

Hello,

We might now use the new method to create prototypes of messages as 
described by a given descriptor :

Person <- P( "tutorial.Person", file = "/tmp/person.proto" )
p <- new( Person )


I have added some code to prepare field extraction (but no code yet). It 
is in extractors.cpp

SEXP extractFieldAsSEXP( const Message * message, const Descriptor* 
desc, const FieldDescriptor * fieldDesc ){
	
	/* depending on the type, we need to create some regular SEXP (INTSXP)
        or a message */
	
     FieldDescriptor::Type type =    fieldDesc->type() ;

	return R_NilValue;
	
}


The idea basically is to have a switch on the type and make the 
appropriate SEXP (INTSXP, STRSXP) for primitives or new instances of 
protobufMessage for messages.

I'll have a look tonight if noone beats me to it (I need to get out now)

Romain

Ps: I have removed the #define foo Rf_foo

-- 
Romain Francois
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http://romainfrancois.blog.free.fr
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