Thanks. I had recently been playing with using XPtr to do some of the
passing RcppModule objects back into c++, with only limited success, so
this will be a welcome change.
Also, I can probably finally cull my hackery of calling
Rcpp::internal::make_new_object in my factory methods, which always made
me a little uneasy by virtue of being in the internal namespace...
-rd
On 11/14/2012 04:16 PM, Dirk Eddelbuettel wrote:
On 14 November 2012 at 13:46, Ian Fellows wrote:
|
| So,… um… Wow!
|
| This is some pretty incredible work, and lines up almost to the letter with
the real world issues that I was experiencing with my package. Reading over the
vignette, a couple of questions popped into my head.
Thanks :) We're very happy that you like it.
| With the //Rcpp::interfaces(cpp) declaration
| 1. Are classes also exported as transparently as functions.
| 2. If my package already has a namespace named ernm, is an extra one wrapped
around it, so that extending packages would have to use ernm::ernm::bar()?
| 3. Just to be clear… this removes the need to make an inline plug-in because you can
just use cppFunction(depends="MyPacakge",…) with no additional glue except for
the interface statement.
If you would have needed a plugin with inline (for one or more of finding
your headers files, set certain flags, determine the linking library and
path, ...) then you still do. The existing plugins for RcppGSL,
RcppArmadillo and RcppEigen served as testing templates. So you may need to
write a 'ernm' plugin...
Similarly, you may need to supply as<>() and wrap() converters.
| I do a lot of passing of objects up and down between R and C++ using home grown code to make the process transparent. Can you speak a little about how the new module object passing is implemented? Are copy constructors called? Is shallow or deep the default? How does one use the new macros?
From 30,000 feet, it "just" sits on top of Rcpp modules which you may have
looked at in the past --- and these provide essentially mostly pass-through
declarations.
JJ will follow-up in a bit with more nitty-gritty.
Cheers, Dirk
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