not.h

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// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
//
// not.h: Rcpp R/C++ interface class library -- 
//
// 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/>.

#ifndef Rcpp__sugar__logical__not_h
#define Rcpp__sugar__logical__not_h

namespace Rcpp{
namespace sugar{  

template <bool NA> struct negate{
        static inline int apply( int x ){
                return Rcpp::traits::is_na<LGLSXP>( x ) ? x : 
                        ( x ? FALSE : TRUE ) ;
        }
} ;
template<> struct negate<false>{
        static inline int apply( int x){
                return x ? FALSE : TRUE ;
        } ;
} ;


template <bool NA, typename T>
class Negate_SingleLogicalResult : public SingleLogicalResult<NA, Negate_SingleLogicalResult<NA,T> >{
public:
        typedef SingleLogicalResult<NA,T> TYPE ;
        typedef SingleLogicalResult<NA, Negate_SingleLogicalResult<NA,T> > BASE ;
        Negate_SingleLogicalResult( const TYPE& orig_ ) : orig(orig_) {}
        
        inline void apply(){
                BASE::set( negate<NA>::apply( orig.get() ) );
        }
        
private:
        const TYPE& orig ;
        
} ;

}
}

template <bool NA,typename T>
inline Rcpp::sugar::Negate_SingleLogicalResult<NA,T> 
operator!( const Rcpp::sugar::SingleLogicalResult<NA,T>& x){
        return Rcpp::sugar::Negate_SingleLogicalResult<NA,T>( x );
}


#endif