[Rcpp-devel] about the RcppSexp (Rcpp::RObject) constructors

Dirk Eddelbuettel edd at debian.org
Thu Dec 31 19:06:35 CET 2009

On 31 December 2009 at 16:52, Romain François wrote:
| Hi,
| Now that I am on the road for class inheritance and all that, I am not 
| sure anymore that the myriad of constructors for Rcpp::RObject are a 
| good idea, i.e since we have for example :
| Rcpp::RObject( double& d ) ;
| it is then valid (as far as my -- still learning -- understanding of C++ 
| goes) to do this :
| Rcpp::Environment( 1.3 )
| which of course is a nuisance.

Oih. That is tricky. Not sure what do to there.

| I was thinking of replacing the constructors with a set of functions 
| (and C++ polymorphism makes it easy I think), so we would have a 
| function (let's decide about its name first) for example wrap and many 
| overloaded with different parameters.
| Rcpp::wrap( const double& d)
| Rcpp::wrap( const std::vector<int>& d)
| ...
| then the wrap can dispatch to the appropriate class.

Hm. Not sure yet. That is tricky. 

In general, I'd be in favour of slowing the rate of changes a tad and trying
to 0.7.1 out :)


Three out of two people have difficulties with fractions.

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