Hello,
while extending Rcpp with my C++ classes, I received hundreds of "
'wrap' is not a template function" and " 'as' is not a template
function" errors when compiling. Beside this, I get an impressive list
of errors referring to RcppGSL files.
The library from which my classes come from makes use GSL (on C++ side),
thus I link RcppGSL to my package.
Here is my extending for one class:
#ifndef SAMDATA_HPP_
#define SAMDATA_HPP_
class SamData;
#include <RcppCommon.h>
namespace Rcpp {
template<> SEXP wrap(const SamData &s);
template<> SamData as( SEXP s ) ;
}
#include <Rcpp.h>
#include "common.hpp"
class SamData {
// class implementation
};
namespace Rcpp {
template<> SEXP wrap(const SamData &s) {
return Rcpp::List::create( Rcpp::Named("Chr1") = s.getChr1(),
Rcpp::Named("Chr2") = s.getChr2(),
Rcpp::Named("Seq1") = s.getSeq(),
Rcpp::Named("HS1") = s.getHS1(),
Rcpp::Named("HS2") = s.getHS2(),
Rcpp::Named("Id") = s.getId(),
Rcpp::Named("Start1") = s.getStart1(),
Rcpp::Named("Start2") = s.getStart2() );
}
template <> SamData as( SEXP s ) {
Rcpp::List samL(s);
SamData sam;
sam.setChr1( Rcpp::as<std::string>(samL["Chr1"]) );
sam.setChr2( Rcpp::as<std::string>(samL["Chr2"]) );
sam.setSeq( Rcpp::as<std::string>(samL["Seq1"]) );
sam.setHS1( Rcpp::as<size_t>(samL["HS1"]) );
sam.setHS2( Rcpp::as<size_t>(samL["HS2"]) );
sam.setStart1( Rcpp::as<long>( samL["Start1"]) );
sam.setStart2( Rcpp::as<long>( samL["Start2"]) );
sam.setId( Rcpp::as<long>( samL["Id"]) );
return sam;
}
}
#endif /* SAMDATA_HPP_ */
The Rcpp package worked just fine before I started using wrap and as.
Also, this very same code runs fine on a separate sample Rcpp project,
where I omit the GSL (and RcppGSL) dependency (I could attach it but I
don't know if it is allowed).
Sorry if this question might sound silly (and it does to me), but is
there any known issue or incompatibility with RcppGSL and wrap/as?
Thanks,
Fabio
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