r - Building packages with Rcpp, Attributes not handled correctly -

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i've been playing around setting r package aims make use of rcpp in rstudio, i'm struggling things work rcpp attributes.

my understanding of how works tenuous, understanding follows:

  1. in source c++ files, can add rcpp attributes, example tag // [[rcpp::export]] marks c++ function exporting, making available r.
  2. when build package, rcpp generates appropriate c++ code in file rcppexports.cpp, , wrapper functions in r source file rcppexports.r.

this doesn't seem working (as expect) when build package. roxygen isn't playing nicely when generating namespace file (so i've disabled that). tag // [[rcpp::export]] seems mark function exporting r, rather marking function being exported package namespace.

more importantly, rcpp attribute tag // [[rcpp::depends()]] isn't being handled correctly. if copy code here new source file, , rebuild package, gcc throws errors on rcppexports.cpp file saying bigmatrix identifier undeclared indicating attribute tage // [[rcpp::depends(bigmemory)]] isn't being handled correctly.

since multiple things aren't working expect, missing in understanding of rcpp attribute tags?

this issue rcppexports.cpp file generated. @ moment, there no way teach include header files somewhere else, not include bigmemory/matrixaccessor.hpp.

a workaround this: 

#include <rcpp.h> #include <bigmemory/matrixaccessor.hpp>  rcpp::numericvector bigcolsums(rcpp::xptr<bigmatrix> pbigmat) {      // create matrix accessor can @ elements of matrix.     matrixaccessor<double> ma(*pbigmat);      // create vector we'll store column sums in.     rcpp::numericvector colsums(pbigmat->ncol());     (size_t i=0; < pbigmat->ncol(); ++i)         colsums[i] = std::accumulate(ma[i], ma[i]+pbigmat->nrow(), 0.0);     return colsums; }  // [[rcpp::export]] rcpp::numericvector bigcolsums( sexp pbigmat ){     return  bigcolsums( rcpp::xptr<bigmatrix>( pbigmat) ) ;    }

so capture type in .cpp file , rcppexports.cpp has know sexp.


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