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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_FieldProxy_h
#define Rcpp_FieldProxy_h
namespace Rcpp{
template <typename CLASS>
class FieldProxyPolicy {
public:
class FieldProxy : public GenericProxy<FieldProxy> {
public:
FieldProxy( CLASS& v, const std::string& name) :
parent(v), field_name(name) {}
FieldProxy& operator=(const FieldProxy& rhs);
template <typename T> FieldProxy& operator=(const T& rhs);
template <typename T> operator T() const;
inline operator SEXP() const { return get(); }
private:
CLASS& parent;
const std::string& field_name ;
SEXP get() const {
Shield<SEXP> str(Rf_mkString(field_name.c_str()));
Shield<SEXP> call(Rf_lang3(R_DollarSymbol, parent, str));
return Rcpp_fast_eval( call, R_GlobalEnv ) ;
}
void set(SEXP x ) {
SEXP dollarGetsSym = Rf_install( "$<-");
Shield<SEXP> str(Rf_mkString(field_name.c_str()));
Shield<SEXP> call(Rf_lang4(dollarGetsSym, parent, str, x));
parent.set__( Rcpp_fast_eval( call, R_GlobalEnv ) );
}
} ;
class const_FieldProxy : public GenericProxy<const_FieldProxy> {
public:
const_FieldProxy( const CLASS& v, const std::string& name) :
parent(v), field_name(name) {}
template <typename T> operator T() const;
inline operator SEXP() const {
return get() ;
}
private:
const CLASS& parent;
const std::string& field_name ;
SEXP get() const {
Shield<SEXP> str(Rf_mkString(field_name.c_str()));
Shield<SEXP> call(Rf_lang3(R_DollarSymbol, parent, str));
return Rcpp_fast_eval( call, R_GlobalEnv ) ;
}
} ;
FieldProxy field(const std::string& name){
return FieldProxy( static_cast<CLASS&>(*this), name ) ;
}
const_FieldProxy field(const std::string& name) const {
return const_FieldProxy( static_cast<const CLASS&>(*this), name ) ;
}
} ;
}
#endif
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