vector.hpp

boost库提供标准的C++ API 配合dev c++使用,功能更加强大

                BOOST_UBLAS_CHECK (index () < (*this) ().size (), bad_index ());
                return *it_;
            }

            // Index
            BOOST_UBLAS_INLINE
            size_type index () const {
                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:
            iterator_type it_;

            friend class const_iterator;
        };
#endif

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

        // Reverse iterator

#ifdef BOOST_MSVC_STD_ITERATOR
        typedef reverse_iterator_base<const_iterator, value_type, const_reference> const_reverse_iterator;
#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 ());
        }

    private:
        size_type size_;
        array_type data_;
    };

    // Bounded vector class
    template<class T, std::size_t N>
    class bounded_vector:
        public vector<T, bounded_array<T, N> > {
    public:
#ifndef BOOST_UBLAS_NO_DERIVED_HELPERS
        BOOST_UBLAS_USING vector<T, bounded_array<T, N> >::operator =;
#endif
        BOOST_STATIC_CONSTANT (std::size_t,  max_size = N);
        typedef vector<T, bounded_array<T, N> > vector_type;

        // Construction and destruction
        BOOST_UBLAS_INLINE
        bounded_vector ():
            vector_type (N) {}
        BOOST_UBLAS_INLINE
        bounded_vector (std::size_t size):
            vector_type (size) {}
        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;
        }
    };

    // Unit vector class
    template<class T>
    class unit_vector:
        public vector_expression<unit_vector<T> > {
    public:
#ifndef BOOST_UBLAS_NO_PROXY_SHORTCUTS
        BOOST_UBLAS_USING vector_expression<unit_vector<T> >::operator ();
#endif
        typedef std::size_t size_type;
        typedef std::ptrdiff_t difference_type;
        typedef T value_type;
        // typedef const T &const_reference;
        typedef typename type_traits<T>::const_reference const_reference;
        typedef T &reference;
        typedef const T *const_pointer;
        typedef T *pointer;
        typedef const unit_vector<T> const_self_type;
        typedef unit_vector<T> self_type;
#ifndef BOOST_UBLAS_CT_REFERENCE_BASE_TYPEDEFS
        typedef const vector_const_reference<const_self_type> const_closure_type;
#else
        typedef const vector_reference<const_self_type> const_closure_type;
#endif
        typedef vector_reference<self_type> closure_type;
        typedef size_type const_iterator_type;
        typedef packed_tag storage_category;

        // Construction and destruction
        BOOST_UBLAS_INLINE
        unit_vector ():
            vector_expression<self_type> (),
            size_ (0), index_ (0) {}
        BOOST_UBLAS_INLINE
        unit_vector (size_type size, size_type index):
            vector_expression<self_type> (),
            size_ (size), index_ (index) {}
        BOOST_UBLAS_INLINE
        unit_vector (const unit_vector &v):
            vector_expression<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 access
        BOOST_UBLAS_INLINE
        const_reference operator () (size_type i) const {
            return i == index_ ? one_ : 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) {
            // Precondition for container relaxed as requested during review.
            // BOOST_UBLAS_CHECK (size_ == v.size_, bad_size ());
            size_ = v.size_;
            index_ = v.index_;
            return *this;
        }
        BOOST_UBLAS_INLINE
        unit_vector &assign_temporary (unit_vector &v) { 
            swap (v);
            return *this;
        }

        // Swapping
        BOOST_UBLAS_INLINE
        void swap (unit_vector &v) {
            // Too unusual semantic.
            // BOOST_UBLAS_CHECK (this != &v, external_logic ());
            if (this != &v) {
                // Precondition for container relaxed as requested during review.
                // BOOST_UBLAS_CHECK (size_ == v.size_, bad_size ());
                std::swap (size_, v.size_);
                std::swap (index_, v.index_);
            }
        }
#ifndef BOOST_UBLAS_NO_MEMBER_FRIENDS
        BOOST_UBLAS_INLINE
        friend void swap (unit_vector &v1, unit_vector &v2) {
            v1.swap (v2);
        }
#endif

#ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
        typedef indexed_const_iterator<self_type, packed_random_access_iterator_tag> iterator;
        typedef indexed_const_iterator<self_type, packed_random_access_iterator_tag> const_iterator;
#else
        class const_iterator;
#endif

        // Element lookup
        BOOST_UBLAS_INLINE
        const_iterator find (size_type i) const {
            i = std::max (i, index_);
            i = std::min (i, index_ + 1);
            return const_iterator (*this, i);
        }

        // Iterators simply are pointers.

#ifndef BOOST_UBLAS_USE_INDEXED_ITERATOR
        class const_iterator:
            public container_const_reference<unit_vector>,
            public random_access_iterator_base<packed_random_access_iterator_tag,
                                               const_iterator, value_type> {
        public:
            typedef packed_random_access_iterator_tag iterator_category;
#ifdef BOOST_MSVC_STD_ITERATOR
            typedef const_reference reference;
#else
            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;
#endif

            // 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_iterator_type &it):
                container_const_reference<unit_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
            reference operator * () const {
                BOOST_UBLAS_CHECK (index () < (*this) ().size (), bad_index ());
                return (*this) () (index ());
            }

            // Index
            BOOST_UBLAS_INLINE
            size_type index () const {
                return it_;
            }

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

        private:
            const_iterator_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

#ifdef BOOST_MSVC_STD_ITERATOR
        typedef reverse_iterator_base<const_iterator, value_type, const_reference> const_reverse_iterator;
#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 ());
        }

    private:
        size_type size_;
        size_type index_;
        static value_type zero_;
        static value_type one_;
    };

    template<class T>
    typename unit_vector<T>::value_type unit_vector<T>::zero_ =
        unit_vector<T>::value_type ();
    template<class T>
    typename unit_vector<T>::value_type unit_vector<T>::one_ =
        unit_vector<T>::value_type (1);

    // Zero vector class
    template<class T>
    class zero_vector:
        public vector_expression<zero_vector<T> > {
    public:
#ifndef BOOST_UBLAS_NO_PROXY_SHORTCUTS
        BOOST_UBLAS_USING vector_expression<zero_vector<T> >::operator ();
#endif
        typedef std::size_t size_type;
        typedef std::ptrdiff_t difference_type;
        typedef T value_type;
        // typedef const T &const_reference;
        typedef typename type_traits<T>::const_reference const_reference;
        typedef T &reference;
        typedef const T *const_pointer;
        typedef T *pointer;
        typedef const zero_vector<T> const_self_type;
        typedef zero_vector<T> self_type;
#ifndef BOOST_UBLAS_CT_REFERENCE_BASE_TYPEDEFS
        typedef const vector_const_reference<const_self_type> const_closure_type;
#else
        typedef const vector_reference<const_self_type> const_closure_type;
#endif
        typedef vector_reference<self_type> closure_type;
        typedef size_type const_iterator_type;
        typedef sparse_tag storage_category;

        // Construction and destruction
        BOOST_UBLAS_INLINE
        zero_vector ():
            vector_expression<self_type> (),
            size_ (0) {}
        BOOST_UBLAS_EXPLICIT BOOST_UBLAS_INLINE
        zero_vector (size_type size):
            vector_expression<self_type> (),
            size_ (size) {}
        BOOST_UBLAS_INLINE
        zero_vector (const zero_vector &v):
            vector_expression<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 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) {
            // Precondition for container relaxed as requested during review.
            // BOOST_UBLAS_CHECK (size_ == v.size_, bad_size ());
            size_ = v.size_;
            return *this;
        }
        BOOST_UBLAS_INLINE
        zero_vector &assign_temporary (zero_vector &v) {
            swap (v);
            return *this;
        }