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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_api_meat_S4_h
#define Rcpp_api_meat_S4_h
namespace Rcpp{
template <template <class> class StoragePolicy>
bool S4_Impl<StoragePolicy>::is( const std::string& clazz) const {
CharacterVector cl = AttributeProxyPolicy<S4_Impl>::attr("class");
// simple test for exact match
if( ! clazz.compare( cl[0] ) ) return true ;
try{
SEXP containsSym = Rf_install("contains");
Shield<SEXP> classDef( R_getClassDef(CHAR(Rf_asChar(cl))) ) ;
CharacterVector res( Rf_getAttrib( R_do_slot( classDef, containsSym), R_NamesSymbol));
return any( res.begin(), res.end(), clazz.c_str() ) ;
} catch( ... ){
// we catch eval_error and also not_compatible when
// contains is NULL
}
return false ;
}
}
#endif
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