[Rcpp-devel] Rcpp::Function

[Romain François]

On 01/05/2010 12:22 AM, Dirk Eddelbuettel wrote:
>
> On 4 January 2010 at 23:59, Romain François wrote:
> | Just to give an example of Rcpp::Function :
> |
> |>  funx<- cfunction(signature(), '
> | + Environment stats_namespace = Environment::namespace_env("stats") ;
> | + Function rnorm( stats_namespace.get("rnorm") ) ;
> | + return rnorm( 10, Named("sd", 100) ) ;
> | + ', Rcpp=TRUE, verbose=FALSE, includes = "using namespace Rcpp;" )
> |>
> |>  funx()
> |   [1]   19.4633261 -121.6885863   34.7072963   -7.1155573  -33.4987573
> |   [6]  -73.0344024  -58.9558195   -0.3289519   81.7164016  151.8835010
> |
> |
> | One thing we are going to have to do at some point is some examples
> | somewhere. We have lots of unit tests, but maybe it would be worth
> | having some C++ only examples (without the inline trick) to show the API.
>
> Yup. We are already beyond the point of an R Journal or JSS article and is
> narrowing a short book, and it only gets worse.  Tell me when you code up
> Time::Machine and we take a timeout and document all this properly.
>
> Dirk

I'd like to have a go at vectors: integer, numeric, raw, character, 
expression, complex, generic (lists).

S4 (S4SXP) I'll do some stuff about slot management. Although we need to 
be careful because some S4 objects don't have the S4SXP SEXPTYPE.

weak references (WEAKREFSXP) I don't know what they do, so i'll write a 
class but it will be a dummy.

byte code (BCODESXP) I have no idea what this is

DOTSXP and ANYSXP not sure how to cover them


Here's what I propose. Let's get something done for vectors, release 
0.7.2 and then start to wear some documenting shoes. I really don't want 
to get into the hoops of branching, etc ...

Beyond the joke, I think this would make a terrific article for JSS or R 
journal, and also a good useR presentation. (I'd also like to present 
RProtoBuf this year, so we need to find some way of dealing with the 
'one presentation per speaker' rule)

Romain

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