Message-ID: <4D9D6FBE.4040405@r-enthusiasts.com>
Date: 2011-04-07T08:03:10Z
From: Romain Francois
Subject: [Rcpp-devel] Problem passing Armadillo objects back to R
In-Reply-To: <BANLkTikcZ0MZ-3M6wjTeEjXQLXF-1w1mnw@mail.gmail.com>
Le 07/04/11 05:07, Christian Gunning a ?crit :
>> 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
>
>
--
Romain Francois
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