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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_ProtectedProxy_h
#define Rcpp_ProtectedProxy_h
namespace Rcpp{
template <typename T> T as(SEXP x);
template <class XPtrClass>
class ProtectedProxyPolicy{
public:
class ProtectedProxy : public GenericProxy<ProtectedProxy> {
public:
ProtectedProxy( XPtrClass& xp_ ): xp(xp_){}
template <typename U>
ProtectedProxy& operator=( const U& u) {
set(Shield<SEXP>(wrap(u)));
return *this;
}
template <typename U>
operator U() const {
return as<U>( get() );
}
operator SEXP() const{
return get() ;
}
private:
XPtrClass& xp ;
inline SEXP get() const {
return R_ExternalPtrProtected(xp) ;
}
inline void set( SEXP x){
R_SetExternalPtrProtected( xp, x ) ;
}
} ;
class const_ProtectedProxy : public GenericProxy<const_ProtectedProxy>{
public:
const_ProtectedProxy( const XPtrClass& xp_ ): xp(xp_){}
template <typename U>
operator U() const {
return as<U>( get() );
}
operator SEXP() const{
return get() ;
}
private:
const XPtrClass& xp ;
inline SEXP get() const {
return R_ExternalPtrProtected(xp) ;
}
} ;
ProtectedProxy prot(){
return ProtectedProxy( static_cast<XPtrClass&>(*this) ) ;
}
const_ProtectedProxy prot() const{
return const_ProtectedProxy( static_cast<const XPtrClass&>(*this) ) ;
}
} ;
}
#endif
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