[Rcpp-devel] Question regarding integrating preexisting C++ code via Rcpp

[Dirk Eddelbuettel]

On 12 October 2011 at 14:51, Simon Fuller wrote:
| Hello,
| 
| We cross-posted. Yes, you're right. I misunderstood the use of includes -

And had you posted reproducible examples we could have told you that days
ago.

Have a look at the recent post by Whit Armstrong about his updated CppBugs
example -- that does just that: mix with other classes.

Dirk

| global -  that is a good way of thinking about it.
| 
| Thanks for everything.
| 
| Simon
| 
| On Wed, Oct 12, 2011 at 2:06 PM, Darren Cook <darren at dcook.org> wrote:
| 
|     > pertain to packages. So I will post the relevant code here, and the full
|     > output from verbose=TRUE below it:
| 
|     I think the verbose output was missing from your email (?).
| 
|     > linktest<-cxxfunction( signature( vec = "numeric", len = "integer" ),
|     paste(
|     > readLines(
|     > "/home/simon/College/PackageOne/src/BZip/LinkTestWrap.cpp"),collapse = "\
|     n"
|     > ) , plugin = "Rcpp",verbose=TRUE )
|     > ...
| 
|     > 2. LinkTestWrap.cpp: Rcpp Wrapping Function (for use by inline)
|     > #include <Rcpp.h>
|     > #include <vector>
|     > #include "/home/simon/College/PackageOne/src/BZip/LinkTest.h"
|     >
|     >     using std::vector;
|     >
|     >     vector<int> input_vector( as< vector<int> >( vec ) );
|     >     int length = as<int> ( len );
|     >
|     >     int res = sumvec( input_vector );
|     >
|     >     return Rcpp::wrap( res );
| 
|     Does this mean you have three #include statements inside your function
|     body? The cxxfunction has an includes parameter where you should put
|     them. I think of "includes" as meaning "global stuff". So you could put
|     your "using std::vector" line in there too (that is just a style
|     difference, though).
| 
|     Also, IIRC, plugin="Rcpp" implies the #include <Rcpp.h>, so you should
|     be able to drop that.
| 
|     Darren
| 
|     --
|     Darren Cook, Software Researcher/Developer
| 
|     http://dcook.org/work/ (About me and my work)
|     http://dcook.org/blogs.html (My blogs and articles)
|     _______________________________________________
|     Rcpp-devel mailing list
|     Rcpp-devel at lists.r-forge.r-project.org
|     https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
| 
| 
| 
| ----------------------------------------------------------------------
| _______________________________________________
| Rcpp-devel mailing list
| Rcpp-devel at lists.r-forge.r-project.org
| https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
-- 
"Outside of a dog, a book is a man's best friend. Inside of a dog, it is too
dark to read." -- Groucho Marx