Revision 8ba44c9f26c8e647779c9b912fdb4faead95d184 authored by Dirk Eddelbuettel on 27 November 2012, 06:43:35 UTC, committed by cran-robot on 27 November 2012, 06:43:35 UTC
1 parent 86e49c7
S4.cpp
// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; indent-tabs-mode: nil; -*-
//
// S4.cpp: Rcpp R/C++ interface class library -- S4 objects
//
// Copyright (C) 2010 - 2011 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/>.
#include <Rcpp/S4.h>
#include <Rcpp/exceptions.h>
#include <Rcpp/Vector.h>
namespace Rcpp {
S4::S4() : RObject(){}
S4::S4(SEXP x) : RObject(){
set( x) ;
}
S4::S4( const S4& other) : RObject(){
setSEXP( other.asSexp() ) ;
}
S4::S4( const RObject::SlotProxy& proxy ) : RObject() {
set( proxy ) ;
}
S4::S4( const RObject::AttributeProxy& proxy ) : RObject() {
set( proxy ) ;
}
S4& S4::operator=( const S4& other){
setSEXP( other.asSexp() ) ;
return *this ;
}
S4& S4::operator=( SEXP other ) {
set( other ) ;
return *this ;
}
S4::S4( const std::string& klass ) {
SEXP oo = PROTECT( R_do_new_object(R_do_MAKE_CLASS(klass.c_str())) ) ;
if (!Rf_inherits(oo, klass.c_str())) {
UNPROTECT( 1) ;
throw S4_creation_error( klass ) ;
}
setSEXP( oo ) ;
UNPROTECT( 1) ; /* oo */
}
bool S4::is( const std::string& clazz ) {
CharacterVector cl = attr("class");
// simple test for exact match
if( ! clazz.compare( cl[0] ) ) return true ;
try{
SEXP containsSym = ::Rf_install("contains");
CharacterVector res(::Rf_getAttrib(
::R_do_slot(::R_getClassDef(CHAR(::Rf_asChar(as<SEXP>(cl)))),
containsSym),
R_NamesSymbol));
//
// mimic the R call:
// names( slot( getClassDef( cl ), "contains" ) )
//
// SEXP slotSym = Rf_install( "slot" ), // cannot cause gc() once in symbol table
// getClassDefSym = Rf_install( "getClassDef" );
// CharacterVector res = internal::try_catch(Rf_lang2(R_NamesSymbol,
// Rf_lang3(slotSym,
// Rf_lang2( getClassDefSym, cl ),
// Rf_mkString( "contains" )))) ;
return any( res.begin(), res.end(), clazz.c_str() ) ;
} catch( ... ){
// we catch eval_error and also not_compatible when
// contains is NULL
}
return false ;
}
void S4::set( SEXP x) {
if( ! ::Rf_isS4(x) ){
throw not_s4() ;
} else{
setSEXP( x) ;
}
}
} // namespace Rcpp
![swh spinner](/static/img/swh-spinner.gif)
Computing file changes ...