minus.h

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// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
//
// minus.h: Rcpp R/C++ interface class library -- operator-
//
// Copyright (C) 2010 - 2025 Dirk Eddelbuettel and Romain Francois
// Copyright (C) 2026        Dirk Eddelbuettel, Romain Francois and Iñaki Ucar
//
// 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__minus_h
#define Rcpp__sugar__minus_h
 
namespace Rcpp{
namespace sugar{
 
        template <int RTYPE, bool LHS_NA, typename LHS_T, bool RHS_NA, typename RHS_T >
        class Minus_Vector_Vector :
            public Rcpp::VectorBase<RTYPE,true, Minus_Vector_Vector<RTYPE,LHS_NA,LHS_T,RHS_NA,RHS_T> > {
        public:
                typedef typename Rcpp::VectorBase<RTYPE,LHS_NA,LHS_T> LHS_TYPE ;
                typedef typename Rcpp::VectorBase<RTYPE,RHS_NA,RHS_T> RHS_TYPE ;
                typedef typename traits::storage_type<RTYPE>::type STORAGE ;
                typedef typename Rcpp::traits::Extractor< RTYPE, LHS_NA, LHS_T>::type LHS_EXT ;
                typedef typename Rcpp::traits::Extractor< RTYPE, RHS_NA, RHS_T>::type RHS_EXT ;
 
                Minus_Vector_Vector( const LHS_TYPE& lhs_, const RHS_TYPE& rhs_ ) :
                        lhs(lhs_.get_ref()), rhs(rhs_.get_ref()) {}
 
                inline STORAGE operator[]( R_xlen_t i ) const {
                        STORAGE x = lhs[i] ;
                        if( Rcpp::traits::is_na<RTYPE>( x ) ) return x ;
                        STORAGE y = rhs[i] ;
                        return Rcpp::traits::is_na<RTYPE>( y ) ? y : RCPP_SAFE_SUB(x, y);
                }
 
                inline R_xlen_t size() const { return lhs.size() ; }
 
        private:
                const LHS_EXT& lhs ;
                const RHS_EXT& rhs ;
        } ;
        // RTYPE = REALSXP
        template <bool LHS_NA, typename LHS_T, bool RHS_NA, typename RHS_T >
        class Minus_Vector_Vector<REALSXP,LHS_NA,LHS_T,RHS_NA,RHS_T> :
            public Rcpp::VectorBase<REALSXP,true, Minus_Vector_Vector<REALSXP,LHS_NA,LHS_T,RHS_NA,RHS_T> > {
        public:
                typedef typename Rcpp::VectorBase<REALSXP,LHS_NA,LHS_T> LHS_TYPE ;
                typedef typename Rcpp::VectorBase<REALSXP,RHS_NA,RHS_T> RHS_TYPE ;
                typedef typename Rcpp::traits::Extractor<REALSXP, LHS_NA, LHS_T>::type LHS_EXT ;
                typedef typename Rcpp::traits::Extractor<REALSXP, RHS_NA, RHS_T>::type RHS_EXT ;
 
                Minus_Vector_Vector( const LHS_TYPE& lhs_, const RHS_TYPE& rhs_ ) :
                        lhs(lhs_.get_ref()), rhs(rhs_.get_ref()) {}
 
                inline double operator[]( R_xlen_t i ) const {
                    return lhs[i] - rhs[i] ;
                }
 
                inline R_xlen_t size() const { return lhs.size() ; }
 
        private:
                const LHS_EXT& lhs ;
                const RHS_EXT& rhs ;
        } ;
 
 
        template <int RTYPE, typename LHS_T, bool RHS_NA, typename RHS_T >
        class Minus_Vector_Vector<RTYPE,false,LHS_T,RHS_NA,RHS_T> : public Rcpp::VectorBase<RTYPE,true, Minus_Vector_Vector<RTYPE,false,LHS_T,RHS_NA,RHS_T> > {
        public:
                typedef typename Rcpp::VectorBase<RTYPE,false,LHS_T> LHS_TYPE ;
                typedef typename Rcpp::VectorBase<RTYPE,RHS_NA,RHS_T> RHS_TYPE ;
                typedef typename traits::storage_type<RTYPE>::type STORAGE ;
                typedef typename Rcpp::traits::Extractor<RTYPE, false, LHS_T>::type LHS_EXT ;
                typedef typename Rcpp::traits::Extractor<RTYPE, RHS_NA, RHS_T>::type RHS_EXT ;
 
                Minus_Vector_Vector( const LHS_TYPE& lhs_, const RHS_TYPE& rhs_ ) :
                        lhs(lhs_.get_ref()), rhs(rhs_.get_ref()) {}
 
                inline STORAGE operator[]( R_xlen_t i ) const {
                        STORAGE y = rhs[i] ;
                        if( Rcpp::traits::is_na<RTYPE>( y ) ) return y ;
                        return lhs[i] - y;
                }
 
                inline R_xlen_t size() const { return lhs.size() ; }
 
        private:
                const LHS_EXT& lhs ;
                const RHS_EXT& rhs ;
        } ;
        // RTYPE = REALSXP
        template <typename LHS_T, bool RHS_NA, typename RHS_T >
        class Minus_Vector_Vector<REALSXP,false,LHS_T,RHS_NA,RHS_T> :
            public Rcpp::VectorBase<REALSXP,true, Minus_Vector_Vector<REALSXP,false,LHS_T,RHS_NA,RHS_T> > {
        public:
                typedef typename Rcpp::VectorBase<REALSXP,false,LHS_T> LHS_TYPE ;
                typedef typename Rcpp::VectorBase<REALSXP,RHS_NA,RHS_T> RHS_TYPE ;
                typedef typename Rcpp::traits::Extractor<REALSXP, false, LHS_T>::type LHS_EXT ;
                typedef typename Rcpp::traits::Extractor<REALSXP, RHS_NA, RHS_T>::type RHS_EXT ;
 
                Minus_Vector_Vector( const LHS_TYPE& lhs_, const RHS_TYPE& rhs_ ) :
                        lhs(lhs_.get_ref()), rhs(rhs_.get_ref()) {}
 
                inline double operator[]( R_xlen_t i ) const {
                        return lhs[i] - rhs[i] ;
                }
 
                inline R_xlen_t size() const { return lhs.size() ; }
 
        private:
                const LHS_EXT& lhs ;
                const RHS_EXT& rhs ;
        } ;
 
 
        template <int RTYPE, bool LHS_NA, typename LHS_T, typename RHS_T >
        class Minus_Vector_Vector<RTYPE,LHS_NA,LHS_T,false,RHS_T> : public Rcpp::VectorBase<RTYPE,true, Minus_Vector_Vector<RTYPE,LHS_NA,LHS_T,false,RHS_T> > {
        public:
                typedef typename Rcpp::VectorBase<RTYPE,LHS_NA,LHS_T> LHS_TYPE ;
                typedef typename Rcpp::VectorBase<RTYPE,false,RHS_T> RHS_TYPE ;
                typedef typename traits::storage_type<RTYPE>::type STORAGE ;
                typedef typename Rcpp::traits::Extractor<RTYPE, LHS_NA, LHS_T>::type LHS_EXT ;
                typedef typename Rcpp::traits::Extractor<RTYPE, false, RHS_T>::type RHS_EXT ;
 
                Minus_Vector_Vector( const LHS_TYPE& lhs_, const RHS_TYPE& rhs_ ) :
                        lhs(lhs_.get_ref()), rhs(rhs_.get_ref()) {}
 
                inline STORAGE operator[]( R_xlen_t i ) const {
                        STORAGE x = lhs[i] ;
                        if( Rcpp::traits::is_na<RTYPE>( x ) ) return x ;
                        return x - rhs[i];
                }
 
                inline R_xlen_t size() const { return lhs.size() ; }
 
        private:
                const LHS_EXT& lhs ;
                const RHS_EXT& rhs ;
        } ;
        // RTYPE = REALSXP
        template <bool LHS_NA, typename LHS_T, typename RHS_T >
        class Minus_Vector_Vector<REALSXP,LHS_NA,LHS_T,false,RHS_T> :
            public Rcpp::VectorBase<REALSXP,true, Minus_Vector_Vector<REALSXP,LHS_NA,LHS_T,false,RHS_T> > {
        public:
                typedef typename Rcpp::VectorBase<REALSXP,LHS_NA,LHS_T> LHS_TYPE ;
                typedef typename Rcpp::VectorBase<REALSXP,false,RHS_T> RHS_TYPE ;
                typedef typename Rcpp::traits::Extractor<REALSXP, LHS_NA, LHS_T>::type LHS_EXT ;
                typedef typename Rcpp::traits::Extractor<REALSXP, false, RHS_T>::type RHS_EXT ;
 
                Minus_Vector_Vector( const LHS_TYPE& lhs_, const RHS_TYPE& rhs_ ) :
                        lhs(lhs_.get_ref()), rhs(rhs_.get_ref()) {}
 
                inline double operator[]( R_xlen_t i ) const {
                        return lhs[i] - rhs[i] ;
                }
 
                inline R_xlen_t size() const { return lhs.size() ; }
 
        private:
                const LHS_EXT& lhs ;
                const RHS_EXT& rhs ;
        } ;
 
 
        template <int RTYPE, typename LHS_T, typename RHS_T >
        class Minus_Vector_Vector<RTYPE,false,LHS_T,false,RHS_T> :
            public Rcpp::VectorBase<RTYPE,false, Minus_Vector_Vector<RTYPE,false,LHS_T,false,RHS_T> > {
        public:
                typedef typename Rcpp::VectorBase<RTYPE,false,LHS_T> LHS_TYPE ;
                typedef typename Rcpp::VectorBase<RTYPE,false,RHS_T> RHS_TYPE ;
                typedef typename traits::storage_type<RTYPE>::type STORAGE ;
                typedef typename Rcpp::traits::Extractor<RTYPE, false, LHS_T>::type LHS_EXT ;
                typedef typename Rcpp::traits::Extractor<RTYPE, false, RHS_T>::type RHS_EXT ;
 
                Minus_Vector_Vector( const LHS_TYPE& lhs_, const RHS_TYPE& rhs_ ) :
                        lhs(lhs_.get_ref()), rhs(rhs_.get_ref()) {}
 
                inline STORAGE operator[]( R_xlen_t i ) const {
                        return lhs[i] - rhs[i];
                }
 
                inline R_xlen_t size() const { return lhs.size() ; }
 
        private:
                const LHS_EXT& lhs ;
                const RHS_EXT& rhs ;
        } ;
        template <typename LHS_T, typename RHS_T >
        class Minus_Vector_Vector<REALSXP,false,LHS_T,false,RHS_T> :
            public Rcpp::VectorBase<REALSXP,false, Minus_Vector_Vector<REALSXP,false,LHS_T,false,RHS_T> > {
        public:
                typedef typename Rcpp::VectorBase<REALSXP,false,LHS_T> LHS_TYPE ;
                typedef typename Rcpp::VectorBase<REALSXP,false,RHS_T> RHS_TYPE ;
                typedef typename Rcpp::traits::Extractor<REALSXP, false, LHS_T>::type LHS_EXT ;
                typedef typename Rcpp::traits::Extractor<REALSXP, false, RHS_T>::type RHS_EXT ;
 
                Minus_Vector_Vector( const LHS_TYPE& lhs_, const RHS_TYPE& rhs_ ) :
                        lhs(lhs_.get_ref()), rhs(rhs_.get_ref()) {}
 
                inline double operator[]( R_xlen_t i ) const {
                        return lhs[i] - rhs[i] ;
                }
 
                inline R_xlen_t size() const { return lhs.size() ; }
 
        private:
                const LHS_EXT& lhs ;
                const RHS_EXT& rhs ;
        } ;
 
 
 
 
 
        template <int RTYPE, bool NA, typename T>
        class Minus_Vector_Primitive :
            public Rcpp::VectorBase<RTYPE,true, Minus_Vector_Primitive<RTYPE,NA,T> > {
        public:
                typedef typename traits::storage_type<RTYPE>::type STORAGE ;
                typedef typename Rcpp::VectorBase<RTYPE,NA,T> VEC_TYPE ;
                typedef typename Rcpp::traits::Extractor<RTYPE,NA,T>::type VEC_EXT ;
 
                Minus_Vector_Primitive( const VEC_TYPE& lhs_, STORAGE rhs_ ) :
                        lhs(lhs_.get_ref()), rhs(rhs_), rhs_na( Rcpp::traits::is_na<RTYPE>(rhs_) ) {}
 
                inline STORAGE operator[]( R_xlen_t i ) const {
                        if( rhs_na ) return rhs ;
                        STORAGE x = lhs[i] ;
                        return Rcpp::traits::is_na<RTYPE>(x) ? x : RCPP_SAFE_SUB(x, rhs);
                }
 
                inline R_xlen_t size() const { return lhs.size() ; }
 
        private:
                const VEC_EXT& lhs ;
                STORAGE rhs ;
                bool rhs_na ;
        } ;
        template <bool NA, typename T>
        class Minus_Vector_Primitive<REALSXP,NA,T> :
            public Rcpp::VectorBase<REALSXP,true, Minus_Vector_Primitive<REALSXP,NA,T> > {
        public:
                typedef typename Rcpp::VectorBase<REALSXP,NA,T> VEC_TYPE ;
                typedef typename Rcpp::traits::Extractor<REALSXP,NA,T>::type VEC_EXT ;
 
                Minus_Vector_Primitive( const VEC_TYPE& lhs_, double rhs_ ) :
                        lhs(lhs_.get_ref()), rhs(rhs_){}
 
                inline double operator[]( R_xlen_t i ) const {
                        return lhs[i] - rhs ;
                }
 
                inline R_xlen_t size() const { return lhs.size() ; }
 
        private:
                const VEC_EXT& lhs ;
                double rhs ;
        } ;
 
 
        template <int RTYPE, typename T>
        class Minus_Vector_Primitive<RTYPE,false,T> :
            public Rcpp::VectorBase<RTYPE,true, Minus_Vector_Primitive<RTYPE,false,T> > {
        public:
                typedef typename traits::storage_type<RTYPE>::type STORAGE ;
                typedef typename Rcpp::VectorBase<RTYPE,false,T> VEC_TYPE ;
                typedef typename Rcpp::traits::Extractor<RTYPE,false,T>::type VEC_EXT ;
 
                Minus_Vector_Primitive( const VEC_TYPE& lhs_, STORAGE rhs_ ) :
                        lhs(lhs_.get_ref()), rhs(rhs_), rhs_na( Rcpp::traits::is_na<RTYPE>(rhs_) ) {}
 
                inline STORAGE operator[]( R_xlen_t i ) const {
                        if( rhs_na ) return rhs ;
                        STORAGE x = lhs[i] ;
                        return Rcpp::traits::is_na<RTYPE>(x) ? x : x - rhs;
                }
 
                inline R_xlen_t size() const { return lhs.size() ; }
 
        private:
                const VEC_EXT& lhs ;
                STORAGE rhs ;
                bool rhs_na ;
        } ;
        template <typename T>
        class Minus_Vector_Primitive<REALSXP,false,T> :
            public Rcpp::VectorBase<REALSXP,true, Minus_Vector_Primitive<REALSXP,false,T> > {
        public:
                typedef typename Rcpp::VectorBase<REALSXP,false,T> VEC_TYPE ;
                typedef typename Rcpp::traits::Extractor<REALSXP,false,T>::type VEC_EXT ;
 
                Minus_Vector_Primitive( const VEC_TYPE& lhs_, double rhs_ ) :
                        lhs(lhs_.get_ref()), rhs(rhs_){}
 
                inline double operator[]( R_xlen_t i ) const {
                        return lhs[i] - rhs ;
                }
 
                inline R_xlen_t size() const { return lhs.size() ; }
 
        private:
                const VEC_EXT& lhs ;
                double rhs ;
        } ;
 
 
 
 
 
 
        template <int RTYPE, bool NA, typename T>
        class Minus_Primitive_Vector :
            public Rcpp::VectorBase<RTYPE,true, Minus_Primitive_Vector<RTYPE,NA,T> > {
        public:
                typedef typename Rcpp::VectorBase<RTYPE,NA,T> VEC_TYPE ;
                typedef typename traits::storage_type<RTYPE>::type STORAGE ;
                typedef typename Rcpp::traits::Extractor<RTYPE,NA,T>::type VEC_EXT ;
 
                Minus_Primitive_Vector( STORAGE lhs_, const VEC_TYPE& rhs_ ) :
                        lhs(lhs_), rhs(rhs_.get_ref()), lhs_na( Rcpp::traits::is_na<RTYPE>(lhs_) ) {}
 
                inline STORAGE operator[]( R_xlen_t i ) const {
                        if( lhs_na ) return lhs ;
                        return RCPP_SAFE_SUB(lhs, rhs[i]);
                }
                inline R_xlen_t size() const { return rhs.size() ; }
 
        private:
                STORAGE lhs ;
                const VEC_EXT& rhs ;
                bool lhs_na ;
        } ;
        template <bool NA, typename T>
        class Minus_Primitive_Vector<REALSXP,NA,T> :
            public Rcpp::VectorBase<REALSXP,true, Minus_Primitive_Vector<REALSXP,NA,T> > {
        public:
                typedef typename Rcpp::VectorBase<REALSXP,NA,T> VEC_TYPE ;
                typedef typename Rcpp::traits::Extractor<REALSXP,NA,T>::type VEC_EXT ;
 
                Minus_Primitive_Vector( double lhs_, const VEC_TYPE& rhs_ ) :
                        lhs(lhs_), rhs(rhs_.get_ref()){}
 
                inline double operator[]( R_xlen_t i ) const {
                        return lhs - rhs[i] ;
                }
                inline R_xlen_t size() const { return rhs.size() ; }
 
        private:
                double lhs ;
                const VEC_EXT& rhs ;
        } ;
 
 
 
        template <int RTYPE, typename T>
        class Minus_Primitive_Vector<RTYPE,false,T> :
            public Rcpp::VectorBase<RTYPE,true, Minus_Primitive_Vector<RTYPE,false,T> > {
        public:
                typedef typename Rcpp::VectorBase<RTYPE,false,T> VEC_TYPE ;
                typedef typename traits::storage_type<RTYPE>::type STORAGE ;
                typedef typename Rcpp::traits::Extractor<RTYPE,false,T>::type VEC_EXT ;
 
                Minus_Primitive_Vector( STORAGE lhs_, const VEC_TYPE& rhs_ ) :
                        lhs(lhs_), rhs(rhs_.get_ref()), lhs_na( Rcpp::traits::is_na<RTYPE>(lhs_) ) {}
 
                inline STORAGE operator[]( R_xlen_t i ) const {
                        if( lhs_na ) return lhs ;
                    return lhs - rhs[i];
                }
 
                inline R_xlen_t size() const { return rhs.size() ; }
 
        private:
                STORAGE lhs ;
                const VEC_EXT& rhs ;
                bool lhs_na ;
 
        } ;
        template <typename T>
        class Minus_Primitive_Vector<REALSXP,false,T> :
            public Rcpp::VectorBase<REALSXP,true, Minus_Primitive_Vector<REALSXP,false,T> > {
        public:
                typedef typename Rcpp::VectorBase<REALSXP,false,T> VEC_TYPE ;
                typedef typename Rcpp::traits::Extractor<REALSXP,false,T>::type VEC_EXT ;
 
                Minus_Primitive_Vector( double lhs_, const VEC_TYPE& rhs_ ) :
                        lhs(lhs_), rhs(rhs_.get_ref()){}
 
                inline double operator[]( R_xlen_t i ) const {
                        return lhs - rhs[i] ;
                }
 
                inline R_xlen_t size() const { return rhs.size() ; }
 
        private:
                double lhs ;
                const VEC_EXT& rhs ;
        } ;
 
 
}
 
template <int RTYPE,bool NA, typename T, typename U>
inline typename traits::enable_if<traits::is_convertible<typename traits::remove_const_and_reference<U>::type, typename traits::storage_type<RTYPE>::type>::value, sugar::Minus_Vector_Primitive< RTYPE , NA, T > >::type
operator-(
        const VectorBase<RTYPE,NA,T>& lhs,
        const U &rhs
) {
        return sugar::Minus_Vector_Primitive<RTYPE,NA,T>( lhs, rhs ) ;
}
 
 
template <int RTYPE,bool NA, typename T, typename U>
inline typename traits::enable_if<traits::is_convertible<typename traits::remove_const_and_reference<U>::type, typename traits::storage_type<RTYPE>::type>::value, sugar::Minus_Primitive_Vector< RTYPE , NA,T> >::type
operator-(
        const U &lhs,
        const VectorBase<RTYPE,NA,T>& rhs
) {
        return sugar::Minus_Primitive_Vector<RTYPE,NA,T>( lhs, rhs ) ;
}
 
template <int RTYPE,bool LHS_NA, typename LHS_T, bool RHS_NA, typename RHS_T>
inline sugar::Minus_Vector_Vector<
        RTYPE ,
        LHS_NA, LHS_T,
        RHS_NA, RHS_T
        >
operator-(
        const VectorBase<RTYPE,LHS_NA,LHS_T>& lhs,
        const VectorBase<RTYPE,RHS_NA,RHS_T>& rhs
) {
        return sugar::Minus_Vector_Vector<
                RTYPE,
                LHS_NA,LHS_T,
                RHS_NA,RHS_T
                >( lhs, rhs ) ;
}
 
}
 
#endif