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// Copyright (C) 2013 Romain Francois
//
// This file is part of Rcpp.
//
// Rcpp is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// Rcpp is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Rcpp. If not, see <http://www.gnu.org/licenses/>.
#ifndef Rcpp_protection_Shelter_H
#define Rcpp_protection_Shelter_H
namespace Rcpp {
template <class T>
class Shelter {
public:
Shelter() : nprotected(0) {}
inline SEXP operator()(SEXP x) {
if (x != R_NilValue) nprotected++;
return Rcpp_protect(x);
}
~Shelter(){
Rcpp_unprotect(nprotected);
nprotected = 0;
}
private:
int nprotected;
// not defined on purpose
Shelter(const Shelter&) ;
Shelter& operator=(const Shelter&) ;
};
}
#endif
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