S4.h

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// S4.h: Rcpp R/C++ interface class library -- S4 objects
//
// Copyright (C) 2010 - 2026 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_S4_h
#define Rcpp_S4_h
 
namespace Rcpp{

    RCPP_API_CLASS(S4_Impl) {
    public:
        RCPP_GENERATE_CTOR_ASSIGN(S4_Impl)
 
        S4_Impl(){} ;

        S4_Impl(SEXP x) {                               // #nocov start
            if( ! ::Rf_isS4(x) ) throw not_s4() ;
            Storage::set__(x) ;
        }                                                               // #nocov end
 
        S4_Impl& operator=( SEXP other ){
            Storage::set__( other ) ;
            return *this ;
        }

        S4_Impl( const std::string& klass ){
            Shield<SEXP> x( R_do_new_object(R_do_MAKE_CLASS(klass.c_str())) );
            if (!Rf_inherits(x, klass.c_str()))
                throw S4_creation_error( klass ) ; // #nocov
            Storage::set__(x) ;
        }

        bool is( const std::string& clazz) const ;

        void update(SEXP x){
            if( ! ::Rf_isS4(x) ) throw not_s4() ;
        }
    } ;
 
    typedef S4_Impl<PreserveStorage> S4 ;
 
} // namespace Rcpp
 
#endif