vector.hpp

support vector clustering for vc++

            swap (v);
            return *this;
        }

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

        // Iterator types
    private:
        // Use bool to indicate begin (one_ as value)
        typedef bool const_subiterator_type;
    public:
        class const_iterator;

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

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

            // Construction and destruction
            BOOST_UBLAS_INLINE
            const_iterator ():
                container_const_reference<unit_vector> (), it_ () {}
            BOOST_UBLAS_INLINE
            const_iterator (const unit_vector &v, const const_subiterator_type &it):
                container_const_reference<unit_vector> (v), it_ (it) {}

            // Arithmetic
            BOOST_UBLAS_INLINE
            const_iterator &operator ++ () {
                BOOST_UBLAS_CHECK (it_, bad_index ());
                it_ = !it_;
                return *this;
            }
            BOOST_UBLAS_INLINE
            const_iterator &operator -- () {
                BOOST_UBLAS_CHECK (!it_, bad_index ());
                it_ = !it_;
                return *this;
            }

            // Dereference
            BOOST_UBLAS_INLINE
            const_reference operator * () const {
                BOOST_UBLAS_CHECK (it_, bad_index ());
                return one_;
            }

            // Index
            BOOST_UBLAS_INLINE
            size_type index () const {
                BOOST_UBLAS_CHECK (it_, bad_index ());
                return (*this) ().index_;
            }

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

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

        private:
            const_subiterator_type it_;
        };

        typedef const_iterator iterator;

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

        // 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_;
        size_type index_;
        typedef const value_type const_value_type;
        static const_value_type zero_;
        static const_value_type one_;
    };

    template<class T>
    typename unit_vector<T>::const_value_type unit_vector<T>::zero_ (0);
    template<class T>
    typename unit_vector<T>::const_value_type unit_vector<T>::one_ (1);


    // Scalar vector class
    template<class T>
    class scalar_vector:
        public vector_container<scalar_vector<T> > {

        typedef const T *const_pointer;
        typedef scalar_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 dense_tag storage_category;

        // Construction and destruction
        BOOST_UBLAS_INLINE
        scalar_vector ():
            vector_container<self_type> (),
            size_ (0), value_ () {}
        BOOST_UBLAS_INLINE
        explicit scalar_vector (size_type size, const value_type &value = value_type(1)):
            vector_container<self_type> (),
            size_ (size), value_ (value) {}
        BOOST_UBLAS_INLINE
        scalar_vector (const scalar_vector &v):
            vector_container<self_type> (),
            size_ (v.size_), value_ (v.value_) {}

        // 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 & value_;
        }

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

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

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

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

        // Iterator types
    private:
        // Use an index
        typedef size_type const_subiterator_type;

    public:
#ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
        typedef indexed_const_iterator<self_type, dense_random_access_iterator_tag> iterator;
        typedef indexed_const_iterator<self_type, dense_random_access_iterator_tag> const_iterator;
#else
        class const_iterator;
#endif

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

#ifndef BOOST_UBLAS_USE_INDEXED_ITERATOR
        class const_iterator:
            public container_const_reference<scalar_vector>,
            public random_access_iterator_base<dense_random_access_iterator_tag,
                                               const_iterator, value_type> {
        public:
            typedef typename scalar_vector::difference_type difference_type;
            typedef typename scalar_vector::value_type value_type;
            typedef typename scalar_vector::const_reference reference;
            typedef typename scalar_vector::const_pointer pointer;

            // Construction and destruction
            BOOST_UBLAS_INLINE
            const_iterator ():
                container_const_reference<scalar_vector> (), it_ () {}
            BOOST_UBLAS_INLINE
            const_iterator (const scalar_vector &v, const const_subiterator_type &it):
                container_const_reference<scalar_vector> (v), it_ (it) {}

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

            // Dereference
            BOOST_UBLAS_INLINE
            const_reference operator * () const {
                BOOST_UBLAS_CHECK (it_ < (*this) ().size (), bad_index ());
                return (*this) () (index ());
            }
            BOOST_UBLAS_INLINE
            const_reference operator [] (difference_type n) const {
                return *(*this + n);
            }

            // Index
            BOOST_UBLAS_INLINE
            size_type index () const {
                BOOST_UBLAS_CHECK (it_ < (*this) ().size (), bad_index ());
                return it_;
            }

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

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

        private:
            const_subiterator_type it_;
        };

        typedef const_iterator iterator;
#endif

        BOOST_UBLAS_INLINE
        const_iterator begin () const {
            return find (0);
        }
        BOOST_UBLAS_INLINE
        const_iterator end () const {
            return find (size_);
        }

        // 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_;
        value_type value_;
    };


    // Array based vector class
    template<class T, std::size_t N>
    class c_vector:
        public vector_container<c_vector<T, N> > {

        typedef c_vector<T, N> 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 value_type array_type[N];
        typedef T *pointer;
        typedef const T *const_pointer;
        typedef const vector_reference<const self_type> const_closure_type;
        typedef vector_reference<self_type> closure_type;
        typedef self_type vector_temporary_type;
        typedef dense_tag storage_category;

        // Construction and destruction
        BOOST_UBLAS_INLINE
        c_vector ():
            size_ (N) /* , data_ () */ {}
        explicit BOOST_UBLAS_INLINE
        c_vector (size_type size):
            size_ (size) /* , data_ () */ {
            if (size_ > N)
                bad_size ().raise ();
        }
        BOOST_UBLAS_INLINE
        c_vector (const c_vector &v):
            size_ (v.size_) /* , data_ () */ {
            if (size_ > N)
                bad_size ().raise ();
            *this = v;
        }
        template<class AE>
        BOOST_UBLAS_INLINE
        c_vector (const vector_expression<AE> &ae):
            size_ (ae ().size ()) /* , data_ () */ {
            if (size_ > N)
                bad_size ().raise ();
            vector_assign<scalar_assign> (*this, ae);
        }

        // Accessors
        BOOST_UBLAS_INLINE
        size_type size () const {
            return size_;
        }
        BOOST_UBLAS_INLINE
        const_pointer data () const {
            return data_;
        }
        BOOST_UBLAS_INLINE
        pointer data () {
            return data_;
        }

        // Resizing