vector_proxy.hpp

CGAL is a collaborative effort of several sites in Europe and Israel. The goal is to make the most i

#else
        typedef reverse_iterator_base<const_iterator> const_reverse_iterator;
#endif

        BOOST_UBLAS_INLINE
        const_reverse_iterator rbegin () const {
            return const_reverse_iterator (end ());
        }
        BOOST_UBLAS_INLINE
        const_reverse_iterator rend () const {
            return const_reverse_iterator (begin ());
        }

#ifdef BOOST_MSVC_STD_ITERATOR
        typedef reverse_iterator_base<iterator, value_type, reference> reverse_iterator;
#else
        typedef reverse_iterator_base<iterator> reverse_iterator;
#endif

        BOOST_UBLAS_INLINE
        reverse_iterator rbegin () {
            return reverse_iterator (end ());
        }
        BOOST_UBLAS_INLINE
        reverse_iterator rend () {
            return reverse_iterator (begin ());
        }

#ifndef BOOST_UBLAS_NESTED_CLASS_DR45
    private:
#endif
        vector_closure_type data_;
        slice_type s_;
        static vector_type nil_;
    };

    template<class V>
    typename vector_slice<V>::vector_type vector_slice<V>::nil_
#ifdef BOOST_UBLAS_STATIC_OLD_INIT
        = BOOST_UBLAS_TYPENAME vector_slice<V>::vector_type ()
#endif
    ;
    
    // Projections
    template<class V>
    BOOST_UBLAS_INLINE
    vector_slice<V> project (V &data, const typename vector_slice<V>::slice_type &s) {
        return vector_slice<V> (data, s);
    }
#ifdef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
    template<class V>
    BOOST_UBLAS_INLINE
    const vector_slice<const V> project_const (const V &data, const typename vector_slice<V>::slice_type &s) {
        return vector_slice<const V> (data, s);
    }
#else
    template<class V>
    BOOST_UBLAS_INLINE
    const vector_slice<const V> project (const V &data, const typename vector_slice<V>::slice_type &s) {
        // ISSUE was: return vector_slice<V> (const_cast<V &> (data), s);
        return vector_slice<const V> (data, s);
    }
    template<class V>
    BOOST_UBLAS_INLINE
    vector_slice<V> project (vector_slice<V> &data, const typename vector_slice<V>::slice_type &s) {
        return data.project (s);
    }
    template<class V>
    BOOST_UBLAS_INLINE
    const vector_slice<V> project (const vector_slice<V> &data, const typename vector_slice<V>::slice_type &s) {
        return data.project (s);
    }
#ifndef BOOST_UBLAS_MSVC71_FUNCTION_TEMPLATE_ORDERING
    template<class V>
    BOOST_UBLAS_INLINE
    vector_slice<V> project (vector_slice<V> &data, const typename vector_slice<V>::range_type &r) {
        return data.project (r);
    }
    template<class V>
    BOOST_UBLAS_INLINE
    const vector_slice<V> project (const vector_slice<V> &data, const typename vector_slice<V>::range_type &r) {
        return data.project (r);
    }
#endif
#endif

    // Vector based indirection class
    // Contributed by Toon Knapen.
    // Extended and optimized by Kresimir Fresl.
    template<class V, class IA>
    class vector_indirect:
        public vector_expression<vector_indirect<V, IA> > {
    public:
#ifndef BOOST_UBLAS_NO_PROXY_SHORTCUTS
        BOOST_UBLAS_USING vector_expression<vector_indirect<V, IA> >::operator ();
#endif
        typedef const V const_vector_type;
        typedef V vector_type;
        typedef const IA const_indirect_array_type;
        typedef IA indirect_array_type;
        typedef typename V::size_type size_type;
        typedef typename V::difference_type difference_type;
        typedef typename V::value_type value_type;
#ifndef BOOST_UBLAS_CT_PROXY_BASE_TYPEDEFS
        typedef typename V::const_reference const_reference;
        typedef typename V::reference reference;
#else
        typedef typename V::const_reference const_reference;
        typedef typename boost::mpl::if_<boost::is_const<V>,
                                          typename V::const_reference,
                                          typename V::reference>::type reference;
#endif
#ifndef BOOST_UBLAS_CT_PROXY_CLOSURE_TYPEDEFS
        typedef typename V::closure_type vector_closure_type;
#else
        typedef typename boost::mpl::if_<boost::is_const<V>,
                                          typename V::const_closure_type,
                                          typename V::closure_type>::type vector_closure_type;
#endif
    private:
        typedef vector_indirect<vector_type, indirect_array_type> self_type;
    public:
        typedef basic_range<size_type, difference_type> range_type;
        typedef basic_slice<size_type, difference_type> slice_type;
        typedef const self_type const_closure_type;
        typedef self_type closure_type;
        typedef typename V::vector_temporary_type vector_temporary_type;
        typedef typename storage_restrict_traits<typename V::storage_category,
                                                 dense_proxy_tag>::storage_category storage_category;

        // Construction and destruction
        BOOST_UBLAS_INLINE
        vector_indirect ():
            data_ (nil_), ia_ () {}
        BOOST_UBLAS_INLINE
        vector_indirect (vector_type &data, size_type size):
            data_ (data), ia_ (size) {}
        BOOST_UBLAS_INLINE
        vector_indirect (vector_type &data, const indirect_array_type &ia):
            data_ (data), ia_ (ia.preprocess (data.size ())) {}
        BOOST_UBLAS_INLINE
        vector_indirect (const vector_closure_type &data, const indirect_array_type &ia, int):
            data_ (data), ia_ (ia.preprocess (data.size ())) {}

        // Accessors
        BOOST_UBLAS_INLINE
        size_type size () const {
            return ia_.size ();
        }
        BOOST_UBLAS_INLINE
        const vector_closure_type &data () const {
            return data_;
        }
        BOOST_UBLAS_INLINE
        vector_closure_type &data () {
            return data_;
        }
        BOOST_UBLAS_INLINE
        const_indirect_array_type &indirect () const {
            return ia_;
        }
        BOOST_UBLAS_INLINE
        indirect_array_type &indirect () {
            return ia_;
        }

        // Element access
#ifndef BOOST_UBLAS_PROXY_CONST_MEMBER
        BOOST_UBLAS_INLINE
        const_reference operator () (size_type i) const {
            return data_ (ia_ (i));
        }
        BOOST_UBLAS_INLINE
        reference operator () (size_type i) {
            return data_ (ia_ (i));
        }

        BOOST_UBLAS_INLINE
        const_reference operator [] (size_type i) const {
            return (*this) (i);
        }
        BOOST_UBLAS_INLINE
        reference operator [] (size_type i) {
            return (*this) (i);
        }
#else
        BOOST_UBLAS_INLINE
        reference operator () (size_type i) const {
            return data_ (ia_ (i));
        }

        BOOST_UBLAS_INLINE
        reference operator [] (size_type i) const {
            return (*this) (i);
        }
#endif

        // ISSUE can this be done in free project function?
        // Although a const function can create a non-const proxy to a non-const object
        // Critical is that vector_type and data_ (vector_closure_type) are const correct
        BOOST_UBLAS_INLINE
        vector_indirect<vector_type, indirect_array_type> project (const range_type &r) const {
            return vector_indirect<vector_type, indirect_array_type> (data_, ia_.compose (r.preprocess (data_.size ())), 0);
        }
        BOOST_UBLAS_INLINE
        vector_indirect<vector_type, indirect_array_type> project (const slice_type &s) const {
            return vector_indirect<vector_type, indirect_array_type> (data_, ia_.compose (s.preprocess (data_.size ())), 0);
        }
        BOOST_UBLAS_INLINE
        vector_indirect<vector_type, indirect_array_type> project (const indirect_array_type &ia) const {
            return vector_indirect<vector_type, indirect_array_type> (data_, ia_.compose (ia.preprocess (data_.size ())), 0);
        }

        // Assignment
        BOOST_UBLAS_INLINE
        vector_indirect &operator = (const vector_indirect &vi) {
            // FIXME: the indirect_arrays could be differently sized.
            // std::copy (vi.begin (), vi.end (), begin ());
            vector_assign (scalar_assign<BOOST_UBLAS_TYPENAME iterator::reference, BOOST_UBLAS_TYPENAME vector_temporary_type::value_type> (), *this, vector_temporary_type (vi));
            return *this;
        }
        BOOST_UBLAS_INLINE
        vector_indirect &assign_temporary (vector_indirect &vi) {
            // FIXME: this is suboptimal.
            // return *this = vi;
            vector_assign (scalar_assign<BOOST_UBLAS_TYPENAME iterator::reference, value_type> (), *this, vi);
            return *this;
        }
        template<class AE>
        BOOST_UBLAS_INLINE
        vector_indirect &operator = (const vector_expression<AE> &ae) {
            vector_assign (scalar_assign<BOOST_UBLAS_TYPENAME iterator::reference, BOOST_UBLAS_TYPENAME vector_temporary_type::value_type> (), *this, vector_temporary_type (ae));
            return *this;
        }
        template<class AE>
        BOOST_UBLAS_INLINE
        vector_indirect &assign (const vector_expression<AE> &ae) {
            vector_assign (scalar_assign<BOOST_UBLAS_TYPENAME iterator::reference, BOOST_UBLAS_TYPENAME AE::value_type> (), *this, ae);
            return *this;
        }
        template<class AE>
        BOOST_UBLAS_INLINE
        vector_indirect &operator += (const vector_expression<AE> &ae) {
            vector_assign (scalar_assign<BOOST_UBLAS_TYPENAME iterator::reference, BOOST_UBLAS_TYPENAME vector_temporary_type::value_type> (), *this, vector_temporary_type (*this + ae));
            return *this;
        }
        template<class AE>
        BOOST_UBLAS_INLINE
        vector_indirect &plus_assign (const vector_expression<AE> &ae) {
            vector_assign (scalar_plus_assign<BOOST_UBLAS_TYPENAME iterator::reference, BOOST_UBLAS_TYPENAME AE::value_type> (), *this, ae);
            return *this;
        }
        template<class AE>
        BOOST_UBLAS_INLINE
        vector_indirect &operator -= (const vector_expression<AE> &ae) {
            vector_assign (scalar_assign<BOOST_UBLAS_TYPENAME iterator::reference, BOOST_UBLAS_TYPENAME vector_temporary_type::value_type> (), *this, vector_temporary_type (*this - ae));
            return *this;
        }
        template<class AE>
        BOOST_UBLAS_INLINE
        vector_indirect &minus_assign (const vector_expression<AE> &ae) {
            vector_assign (scalar_minus_assign<BOOST_UBLAS_TYPENAME iterator::reference, BOOST_UBLAS_TYPENAME AE::value_type> (), *this, ae);
            return *this;
        }
        template<class AT>
        BOOST_UBLAS_INLINE
        vector_indirect &operator *= (const AT &at) {
            vector_assign_scalar (scalar_multiplies_assign<BOOST_UBLAS_TYPENAME iterator::reference, AT> (), *this, at);
            return *this;
        }
        template<class AT>
        BOOST_UBLAS_INLINE
        vector_indirect &operator /= (const AT &at) {
            vector_assign_scalar (scalar_divides_assign<BOOST_UBLAS_TYPENAME iterator::reference, AT> (), *this, at);
            return *this;
        }

        // Closure comparison
        BOOST_UBLAS_INLINE
        bool same_closure (const vector_indirect &vr) const {
return true;
        }

        // Comparison
        BOOST_UBLAS_INLINE
        bool operator == (const vector_indirect &vi) const {
            return (*this).data_ == vi.data_ && ia_ == vi.ia_;
        }

        // Swapping
        BOOST_UBLAS_INLINE
        void swap (vector_indirect vi) {
            if (this != &vi) {
                BOOST_UBLAS_CHECK (size () == vi.size (), bad_size ());
                // Sparse ranges may be nonconformant now.
                // std::swap_ranges (begin (), end (), vi.begin ());
                vector_swap (scalar_swap<BOOST_UBLAS_TYPENAME iterator::reference, BOOST_UBLAS_TYPENAME iterator::reference> (), *this, vi);
            }
        }
#ifndef BOOST_UBLAS_NO_MEMBER_FRIENDS
        BOOST_UBLAS_INLINE
        friend void swap (vector_indirect vi1, vector_indirect vi2) {
            vi1.swap (vi2);
        }
#endif

        // Iterator types
    private:
        // Use indirect array as an index - FIXME this fails for packed assignment
        typedef typename IA::const_iterator const_iterator_type;
        typedef typename IA::const_iterator iterator_type;

    public:
#ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
        typedef indexed_iterator<vector_indirect<vector_type, indirect_array_type>,
                                 BOOST_UBLAS_TYPENAME vector_type::iterator::iterator_category> iterator;
        typedef indexed_const_iterator<vector_indirect<vector_type, indirect_array_type>,
                                       BOOST_UBLAS_TYPENAME vector_type::const_iterator::iterator_category> const_iterator;
#else
        class const_iterator;
        class iterator;
#endif
        // Element lookup
        BOOST_UBLAS_INLINE
        const_iterator find (size_type i) const {
#ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
            return const_iterator (*this, i);
#else
            return const_iterator (*this, ia_.begin () + i);
#endif
        }
        BOOST_UBLAS_INLINE
        iterator find (size_type i) {
#ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
            return iterator (*this, i);
#else
            return iterator (*this, ia_.begin () + i);
#endif
        }

        // Iterators simply are indices.

#ifndef BOOST_UBLAS_USE_INDEXED_ITERATOR
        class const_iterator: