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

[Darren Cook]

> 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

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