vector.hpp

support vector clustering for vc++

            BOOST_UBLAS_INLINE
            iterator &operator -= (difference_type n) {
                it_ -= n;
                return *this;
            }
            BOOST_UBLAS_INLINE
            difference_type operator - (const iterator &it) const {
                BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
                return it_ - it.it_;
            }

            // Dereference
            BOOST_UBLAS_INLINE
            reference operator * () const {
                BOOST_UBLAS_CHECK (it_ >= (*this) ().begin ().it_ && it_ < (*this) ().end ().it_ , bad_index ());
                return *it_;
            }
            BOOST_UBLAS_INLINE
            reference operator [] (difference_type n) const {
                return *(it_ + n);
            }

            // Index
            BOOST_UBLAS_INLINE
            size_type index () const {
                BOOST_UBLAS_CHECK (it_ >= (*this) ().begin ().it_ && it_ < (*this) ().end ().it_ , bad_index ());
                return it_ - (*this) ().begin ().it_;
            }

            // Assignment
            BOOST_UBLAS_INLINE
            iterator &operator = (const iterator &it) {
                container_reference<self_type>::assign (&it ());
                it_ = it.it_;
                return *this;
            }

            // Comparison
            BOOST_UBLAS_INLINE
            bool operator == (const iterator &it) const {
                BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
                return it_ == it.it_;
            }
            BOOST_UBLAS_INLINE
            bool operator < (const iterator &it) const {
                BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
                return it_ < it.it_;
            }

        private:
            subiterator_type it_;

            friend class const_iterator;
        };
#endif

        BOOST_UBLAS_INLINE
        iterator begin () {
            return find (0);
        }
        BOOST_UBLAS_INLINE
        iterator end () {
            return find (data_.size ());
        }

        // Reverse iterator
        typedef reverse_iterator_base<const_iterator> const_reverse_iterator;
        typedef reverse_iterator_base<iterator> reverse_iterator;

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

    private:
        array_type data_;
    };


    // Bounded vector class
    template<class T, std::size_t N>
    class bounded_vector:
        public vector<T, bounded_array<T, N> > {

        typedef vector<T, bounded_array<T, N> > vector_type;
    public:
        typedef typename vector_type::size_type size_type;
        static const size_type max_size = N;

        // Construction and destruction
        BOOST_UBLAS_INLINE
        bounded_vector ():
            vector_type (N) {}
        BOOST_UBLAS_INLINE
        bounded_vector (size_type size):
            vector_type (size) {}
        BOOST_UBLAS_INLINE
        bounded_vector (const bounded_vector &v):
            vector_type (v) {}
        template<class A2>              // Allow vector<T,bounded_array<N> construction
        BOOST_UBLAS_INLINE
        bounded_vector (const vector<T, A2> &v):
            vector_type (v) {}
        template<class AE>
        BOOST_UBLAS_INLINE
        bounded_vector (const vector_expression<AE> &ae):
            vector_type (ae) {}
        BOOST_UBLAS_INLINE
        ~bounded_vector () {}

        // Assignment
        BOOST_UBLAS_INLINE
        bounded_vector &operator = (const bounded_vector &v) {
            vector_type::operator = (v);
            return *this;
        }
        template<class A2>         // Generic vector assignment
        BOOST_UBLAS_INLINE
        bounded_vector &operator = (const vector<T, A2> &v) {
            vector_type::operator = (v);
            return *this;
        }
        template<class C>          // Container assignment without temporary
        BOOST_UBLAS_INLINE
        bounded_vector &operator = (const vector_container<C> &v) {
            vector_type::operator = (v);
            return *this;
        }
        template<class AE>
        BOOST_UBLAS_INLINE
        bounded_vector &operator = (const vector_expression<AE> &ae) {
            vector_type::operator = (ae);
            return *this;
        }
    };


    // Zero vector class
    template<class T>
    class zero_vector:
        public vector_container<zero_vector<T> > {

        typedef const T *const_pointer;
        typedef zero_vector<T> self_type;
    public:
#ifdef BOOST_UBLAS_ENABLE_PROXY_SHORTCUTS
        using vector_container<self_type>::operator ();
#endif
        typedef std::size_t size_type;
        typedef std::ptrdiff_t difference_type;
        typedef T value_type;
        typedef const T &const_reference;
        typedef T &reference;
        typedef const vector_reference<const self_type> const_closure_type;
        typedef vector_reference<self_type> closure_type;
        typedef sparse_tag storage_category;

        // Construction and destruction
        BOOST_UBLAS_INLINE
        zero_vector ():
            vector_container<self_type> (),
            size_ (0) {}
        explicit BOOST_UBLAS_INLINE
        zero_vector (size_type size):
            vector_container<self_type> (),
            size_ (size) {}
        BOOST_UBLAS_INLINE
        zero_vector (const zero_vector &v):
            vector_container<self_type> (),
            size_ (v.size_) {}

        // Accessors
        BOOST_UBLAS_INLINE
        size_type size () const {
            return size_;
        }

        // Resizing
        BOOST_UBLAS_INLINE
        void resize (size_type size, bool /*preserve*/ = true) {
            size_ = size;
        }

        // Element support
        BOOST_UBLAS_INLINE
        const_pointer find_element (size_type i) const {
            return & zero_;
        }

        // Element access
        BOOST_UBLAS_INLINE
        const_reference operator () (size_type /* i */) const {
            return zero_;
        }

        BOOST_UBLAS_INLINE
        const_reference operator [] (size_type i) const {
            return (*this) (i);
        }

        // Assignment
        BOOST_UBLAS_INLINE
        zero_vector &operator = (const zero_vector &v) {
            size_ = v.size_;
            return *this;
        }
        BOOST_UBLAS_INLINE
        zero_vector &assign_temporary (zero_vector &v) {
            swap (v);
            return *this;
        }

        // Swapping
        BOOST_UBLAS_INLINE
        void swap (zero_vector &v) {
            if (this != &v) {
                std::swap (size_, v.size_);
            }
        }
        BOOST_UBLAS_INLINE
        friend void swap (zero_vector &v1, zero_vector &v2) {
            v1.swap (v2);
        }

        // Iterator types
    public:
        class const_iterator;

        // Element lookup
        BOOST_UBLAS_INLINE
        const_iterator find (size_type /*i*/) const {
            return const_iterator (*this);
        }

        class const_iterator:
            public container_const_reference<zero_vector>,
            public bidirectional_iterator_base<sparse_bidirectional_iterator_tag,
                                               const_iterator, value_type> {
        public:
            typedef typename zero_vector::difference_type difference_type;
            typedef typename zero_vector::value_type value_type;
            typedef typename zero_vector::const_reference reference;
            typedef typename zero_vector::const_pointer pointer;

            // Construction and destruction
            BOOST_UBLAS_INLINE
            const_iterator ():
                container_const_reference<self_type> () {}
            BOOST_UBLAS_INLINE
            const_iterator (const self_type &v):
                container_const_reference<self_type> (v) {}

            // Arithmetic
            BOOST_UBLAS_INLINE
            const_iterator &operator ++ () {
                BOOST_UBLAS_CHECK_FALSE (bad_index ());
                return *this;
            }
            BOOST_UBLAS_INLINE
            const_iterator &operator -- () {
                BOOST_UBLAS_CHECK_FALSE (bad_index ());
                return *this;
            }

            // Dereference
            BOOST_UBLAS_INLINE
            const_reference operator * () const {
                BOOST_UBLAS_CHECK_FALSE (bad_index ());
                return zero_;   // arbitary return value
            }

            // Index
            BOOST_UBLAS_INLINE
            size_type index () const {
                BOOST_UBLAS_CHECK_FALSE (bad_index ());
                return 0;   // arbitary return value
            }

            // Assignment
            BOOST_UBLAS_INLINE
            const_iterator &operator = (const const_iterator &it) {
                container_const_reference<self_type>::assign (&it ());
                return *this;
            }

            // Comparison
            BOOST_UBLAS_INLINE
            bool operator == (const const_iterator &it) const {
                BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
                detail::ignore_unused_variable_warning(it);
                return true;
            }
        };

        typedef const_iterator iterator;

        BOOST_UBLAS_INLINE
        const_iterator begin () const {
            return const_iterator (*this);
        }
        BOOST_UBLAS_INLINE
        const_iterator end () const {
            return const_iterator (*this);
        }

        // Reverse iterator
        typedef reverse_iterator_base<const_iterator> const_reverse_iterator;

        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 ());
        }

    private:
        size_type size_;
        typedef const value_type const_value_type;
        static const_value_type zero_;
    };

    template<class T>
    typename zero_vector<T>::const_value_type zero_vector<T>::zero_ (0);


    // Unit vector class
    template<class T>
    class unit_vector:
        public vector_container<unit_vector<T> > {

        typedef const T *const_pointer;
        typedef unit_vector<T> self_type;
    public:
#ifdef BOOST_UBLAS_ENABLE_PROXY_SHORTCUTS
        using vector_container<self_type>::operator ();
#endif
        typedef std::size_t size_type;
        typedef std::ptrdiff_t difference_type;
        typedef T value_type;
        typedef const T &const_reference;
        typedef T &reference;
        typedef const vector_reference<const self_type> const_closure_type;
        typedef vector_reference<self_type> closure_type;
        typedef sparse_tag storage_category;

        // Construction and destruction
        BOOST_UBLAS_INLINE
        unit_vector ():
            vector_container<self_type> (),
            size_ (0), index_ (0) {}
        BOOST_UBLAS_INLINE
        explicit unit_vector (size_type size, size_type index = 0):
            vector_container<self_type> (),
            size_ (size), index_ (index) {}
        BOOST_UBLAS_INLINE
        unit_vector (const unit_vector &v):
            vector_container<self_type> (),
            size_ (v.size_), index_ (v.index_) {}

        // Accessors
        BOOST_UBLAS_INLINE
        size_type size () const {
            return size_;
        }
        BOOST_UBLAS_INLINE
        size_type index () const {
            return index_;
        }

        // Resizing
        BOOST_UBLAS_INLINE
        void resize (size_type size, bool /*preserve*/ = true) {
            size_ = size;
        }

        // Element support
        BOOST_UBLAS_INLINE
        const_pointer find_element (size_type i) const {
            if (i == index_)
                return & one_;
            else
                return & zero_;
        }

        // Element access
        BOOST_UBLAS_INLINE
        const_reference operator () (size_type i) const {
            if (i == index_)
                return one_;
            else
                return zero_;
        }

        BOOST_UBLAS_INLINE
        const_reference operator [] (size_type i) const {
            return (*this) (i);
        }

        // Assignment
        BOOST_UBLAS_INLINE
        unit_vector &operator = (const unit_vector &v) {
            size_ = v.size_;
            index_ = v.index_;
            return *this;
        }
        BOOST_UBLAS_INLINE
        unit_vector &assign_temporary (unit_vector &v) {