[Rcpp-devel] Problem passing Armadillo objects back to R

[Romain Francois]

Le 07/04/11 05:07, Christian Gunning a écrit :
>> The issue is that when calling wrap it creates an unprotected SEXP, and
>> Rcpp is not responsible for these. If the programmer passes an
>> unprotected SEXP to ::create, it is his responsability to protect it.
>
> Just to clarify -- in the case of a naive user who's not protecting
> objects: a single wrap as the last call in a function is one case that
> will *always* work as expected, correct?

I think you are right.

> And when using more than one
> wrap, later ones can *potentially* but not necessarily clobber earlier
> ones, yes?

This is what makes it difficult to detect. You never know when garbage 
is being collected.

> thanks,
> -christian
>
>


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