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// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
//
// VectorBase.h: Rcpp R/C++ interface class library --
//
// Copyright (C) 2010 - 2013 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__vector__VectorBase_h
#define Rcpp__vector__VectorBase_h
namespace Rcpp{
/** a base class for vectors, modelled after the CRTP */
template <int RTYPE, bool na, typename VECTOR>
class VectorBase : public traits::expands_to_logical__impl<RTYPE> {
public:
struct rcpp_sugar_expression{} ;
struct r_type : traits::integral_constant<int,RTYPE>{} ;
struct can_have_na : traits::integral_constant<bool,na>{} ;
typedef typename traits::storage_type<RTYPE>::type stored_type ;
typedef typename traits::storage_type<RTYPE>::type elem_type ;
VECTOR& get_ref(){
return static_cast<VECTOR&>(*this) ;
}
const VECTOR& get_ref() const {
return static_cast<const VECTOR&>(*this) ;
}
inline stored_type operator[]( R_xlen_t i) const {
return static_cast<const VECTOR*>(this)->operator[](i) ;
}
inline R_xlen_t size() const { return static_cast<const VECTOR*>(this)->size() ; }
class iterator {
public:
typedef stored_type reference ;
typedef stored_type* pointer ;
typedef R_xlen_t difference_type ;
typedef stored_type value_type;
typedef std::random_access_iterator_tag iterator_category ;
iterator( const VectorBase& object_, R_xlen_t index_ ) : object(object_.get_ref()), index(index_){}
iterator( const iterator& other) : object(other.object), index(other.index){};
inline iterator& operator++(){
index++ ;
return *this ;
}
inline iterator operator++(int){
iterator orig(*this);
++(*this) ;
return orig ;
}
inline iterator& operator--(){
index-- ;
return *this ;
}
inline iterator operator--(int){
iterator orig(*this);
--(*this) ;
return orig ;
}
inline iterator operator+(difference_type n) const {
return iterator( object, index+n ) ;
}
inline iterator operator-(difference_type n) const {
return iterator( object, index-n ) ;
}
inline iterator& operator+=(difference_type n) {
index += n ;
return *this ;
}
inline iterator& operator-=(difference_type n) {
index -= n;
return *this ;
}
inline reference operator[](R_xlen_t i){
return object[index+i] ;
}
inline reference operator*() {
return object[index] ;
}
inline pointer operator->(){
return &object[index] ;
}
inline bool operator==( const iterator& y) const {
return ( index == y.index ) ;
}
inline bool operator!=( const iterator& y) const {
return ( index != y.index ) ;
}
inline bool operator<( const iterator& other ) const {
return index < other.index ;
}
inline bool operator>( const iterator& other ) const {
return index > other.index ;
}
inline bool operator<=( const iterator& other ) const {
return index <= other.index ;
}
inline bool operator>=( const iterator& other ) const {
return index >= other.index ;
}
inline difference_type operator-(const iterator& other) const {
return index - other.index ;
}
private:
const VECTOR& object ;
R_xlen_t index;
} ;
typedef iterator const_iterator;
inline iterator begin() const { return iterator(*this, 0) ; }
inline iterator end() const { return iterator(*this, size() ) ; }
} ;
} // namespace Rcpp
#endif
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