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Copy pathr_cast.h
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45 lines (37 loc) · 1.47 KB
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#ifndef Rcpp_rcast_h
#define Rcpp_rcast_h
namespace Rcpp{
namespace internal {
inline SEXP convert_using_rfunction(SEXP x, const char* const fun) {
SEXP res = R_NilValue ;
try{
SEXP funSym = Rf_install(fun);
res = Rcpp_eval( Rf_lang2( funSym, x ) ) ;
} catch( ... ){
stop("could not convert using R function '%s' ", fun) ;
}
return res;
}
// r_true_cast is only meant to be used when the target SEXP type
// is different from the SEXP type of x
template <int TARGET>
SEXP r_true_cast( SEXP /* x */) {
stop( "not compatible" ) ;
return R_NilValue ;
}
template<> SEXP r_true_cast<INTSXP>(SEXP x) ;
template<> SEXP r_true_cast<REALSXP>(SEXP x) ;
template<> SEXP r_true_cast<RAWSXP>(SEXP x) ;
template<> SEXP r_true_cast<CPLXSXP>(SEXP x) ;
template<> SEXP r_true_cast<LGLSXP>(SEXP x) ;
template<> SEXP r_true_cast<STRSXP>(SEXP x) ;
template<> SEXP r_true_cast<VECSXP>(SEXP x) ;
template<> SEXP r_true_cast<EXPRSXP>(SEXP x) ;
template<> SEXP r_true_cast<LISTSXP>(SEXP x) ;
template<> SEXP r_true_cast<LANGSXP>(SEXP x) ;
} // namespace internal
template <int TARGET> SEXP r_cast( SEXP x) {
return (TYPEOF(x)== TARGET) ? x : internal::r_true_cast<TARGET>(x) ;
}
} // namespace Rcpp
#endif