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#ifndef Rcpp_PreserveStorage_h
#define Rcpp_PreserveStorage_h
namespace Rcpp{
template <typename CLASS>
class PreserveStorage {
public:
PreserveStorage() : data(R_NilValue){}
~PreserveStorage(){
Rcpp_ReleaseObject(data) ;
data = R_NilValue;
}
inline void set__(SEXP x){
data = Rcpp_ReplaceObject(data, x) ;
// calls the update method of CLASS
// this is where to react to changes in the underlying SEXP
static_cast<CLASS&>(*this).update(data) ;
}
inline SEXP get__() const {
return data ;
}
inline SEXP invalidate__(){
SEXP out = data ;
data = R_NilValue ;
return out ;
}
template <typename T>
inline T& copy__(const T& other){
if( this != &other){
set__(other.get__());
}
return static_cast<T&>(*this) ;
}
inline bool inherits(const char* clazz) const {
return ::Rf_inherits( data, clazz) ;
}
inline operator SEXP() const { return data; }
private:
SEXP data ;
} ;
}
#endif
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