named_object.h

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// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
/* :tabSize=4:indentSize=4:noTabs=false:folding=explicit:collapseFolds=1: */
//
// has_iterator.h: Rcpp R/C++ interface class library -- identify if a class has a nested iterator typedef
//
// Copyright (C) 2010 - 2012 Dirk Eddelbuettel and 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__traits__named_object__h
#define Rcpp__traits__named_object__h

namespace Rcpp{
class Argument ;

namespace traits{

template <typename T> struct needs_protection : false_type{} ;
template <> struct needs_protection<SEXP> : true_type{} ;       

template <typename T> class named_object {
        public:
                named_object( const std::string& name_, const T& o_) : 
                name(name_), object(o_){}
                const std::string& name ;
                const T& object ;
                
} ;
template <> class named_object<SEXP> {
public:
        named_object( const std::string& name_, const SEXP& o_):
        name(name_), object(o_){
                R_PreserveObject(object) ;      
        }
        ~named_object(){
                R_ReleaseObject(object) ;       
        }
        const std::string& name ;
        SEXP object ;
} ;


template <typename T> struct is_named : public false_type{} ;
template <typename T> struct is_named< named_object<T> >   : public true_type {} ;
template <> struct is_named< Rcpp::Argument >   : public true_type {} ;

} // namespace traits
} // namespace Rcpp

#endif