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// const_generic_proxy.h: Rcpp R/C++ interface class library --
//
// Copyright (C) 2013 - 2018 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__vector__const_generic_proxy_h
#define Rcpp__vector__const_generic_proxy_h
namespace Rcpp{
namespace internal{
template <int RTYPE, template <class> class StoragePolicy>
class const_generic_proxy : public GenericProxy< const_generic_proxy<RTYPE, StoragePolicy> > {
public:
typedef typename ::Rcpp::Vector<RTYPE, StoragePolicy> VECTOR ;
const_generic_proxy(): parent(0), index(-1){}
const_generic_proxy( const const_generic_proxy& other ) :
parent(other.parent), index(other.index){} ;
const_generic_proxy( const VECTOR& v, R_xlen_t i ) : parent(&v), index(i){} ;
operator SEXP() const {
return get() ;
}
template <typename U> operator U() const {
return ::Rcpp::as<U>(get()) ;
}
// helping the compiler (not sure why it can't help itself)
operator bool() const { return ::Rcpp::as<bool>(get()) ; }
operator int() const { return ::Rcpp::as<int>(get()) ; }
inline void move(R_xlen_t n) { index += n ; }
const VECTOR* parent;
R_xlen_t index ;
private:
inline SEXP get() const {
return VECTOR_ELT(*parent, index );
}
} ;
}
}
#endif
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