matrix_proxy.hpp

boost库提供标准的C++ API 配合dev c++使用,功能更加强大

                it2_ = it.it2_;
                return *this;
            }

            // Comparison
            BOOST_UBLAS_INLINE
            bool operator == (const const_iterator &it) const {
                BOOST_UBLAS_CHECK ((*this) () == it (), external_logic ());
                return it1_ == it.it1_ && it2_ == it.it2_;
            }
            BOOST_UBLAS_INLINE
            bool operator < (const const_iterator &it) const {
                BOOST_UBLAS_CHECK ((*this) () == it (), external_logic ());
                return it1_ < it.it1_ && it2_ < it.it2_;
            }

        private:
            const_iterator1_type it1_;
            const_iterator2_type it2_;
        };

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

        class iterator:
            public container_reference<matrix_vector_range>,
#ifdef BOOST_UBLAS_USE_ITERATOR_BASE_TRAITS
            public iterator_base_traits<typename iterator_restrict_traits<typename M::iterator1::iterator_category,
                                                                          typename M::iterator2::iterator_category>::iterator_category>::template
                        iterator_base<iterator, value_type>::type {
#else
            public random_access_iterator_base<typename iterator_restrict_traits<typename M::iterator1::iterator_category,
                                                                                 typename M::iterator2::iterator_category>::iterator_category,
                                               iterator, value_type> {
#endif
        public:
            typedef typename iterator_restrict_traits<typename M::iterator1::iterator_category,
                                                      typename M::iterator2::iterator_category>::iterator_category iterator_category;
#ifndef BOOST_MSVC_STD_ITERATOR
            typedef typename matrix_vector_range::difference_type difference_type;
            typedef typename matrix_vector_range::value_type value_type;
            typedef typename matrix_vector_range::reference reference;
            typedef typename matrix_vector_range::pointer pointer;
#endif

            // Construction and destruction
            BOOST_UBLAS_INLINE
            iterator ():
                container_reference<self_type> (), it1_ (), it2_ () {}
            BOOST_UBLAS_INLINE
            iterator (self_type &mvr, const iterator1_type &it1, const iterator2_type &it2):
                container_reference<self_type> (mvr), it1_ (it1), it2_ (it2) {}

            // Arithmetic
            BOOST_UBLAS_INLINE
            iterator &operator ++ () {
                ++ it1_;
                ++ it2_;
                return *this;
            }
            BOOST_UBLAS_INLINE
            iterator &operator -- () {
                -- it1_;
                -- it2_;
                return *this;
            }
            BOOST_UBLAS_INLINE
            iterator &operator += (difference_type n) {
                it1_ += n;
                it2_ += n;
                return *this;
            }
            BOOST_UBLAS_INLINE
            iterator &operator -= (difference_type n) {
                it1_ -= n;
                it2_ -= n;
                return *this;
            }
            BOOST_UBLAS_INLINE
            difference_type operator - (const iterator &it) const {
                BOOST_UBLAS_CHECK ((*this) () == it (), external_logic ());
                return BOOST_UBLAS_SAME (it1_ - it.it1_, it2_ - it.it2_);
            }

            // Dereference
            BOOST_UBLAS_INLINE
            reference operator * () const {
                return (*this) ().data () (*it1_, *it2_); 
            }

            // Index
            BOOST_UBLAS_INLINE
            size_type index () const {
                return BOOST_UBLAS_SAME (it1_.index (), it2_.index ());
            }

            // Assignment
            BOOST_UBLAS_INLINE
            iterator &operator = (const iterator &it) {
                container_reference<self_type>::assign (&it ());
                it1_ = it.it1_;
                it2_ = it.it2_;
                return *this;
            }

            // Comparison
            BOOST_UBLAS_INLINE
            bool operator == (const iterator &it) const {
                BOOST_UBLAS_CHECK ((*this) () == it (), external_logic ());
                return it1_ == it.it1_ && it2_ == it.it2_;
            }
            BOOST_UBLAS_INLINE
            bool operator < (const iterator &it) const {
                BOOST_UBLAS_CHECK ((*this) () == it (), external_logic ());
                return it1_ < it.it1_ && it2_ < it.it2_;
            }

        private:
            iterator1_type it1_;
            iterator2_type it2_;

            friend class const_iterator;
        };

        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:
        matrix_closure_type data_;
        range r1_;
        range r2_;
        static matrix_type nil_;
    };

    template<class M>
    typename matrix_vector_range<M>::matrix_type matrix_vector_range<M>::nil_;

    // Matrix based vector slice class
    template<class M>
    class matrix_vector_slice:
        public vector_expression<matrix_vector_slice<M> > {
    public:
#ifndef BOOST_UBLAS_NO_PROXY_SHORTCUTS
        BOOST_UBLAS_USING vector_expression<matrix_vector_slice<M> >::operator ();
#endif
        typedef const M const_matrix_type;
        typedef M matrix_type;
        typedef typename M::simd_category simd_category;
        typedef typename M::size_type size_type;
        typedef typename M::difference_type difference_type;
        typedef typename M::value_type value_type;
#ifndef BOOST_UBLAS_CT_PROXY_BASE_TYPEDEFS
        typedef typename M::const_reference const_reference;
        typedef typename M::reference reference;
        typedef typename M::const_pointer const_pointer;
        typedef typename M::pointer pointer;
#else
        typedef typename M::const_reference const_reference;
        typedef typename boost::mpl::if_c<boost::is_const<M>::value,
                                          typename M::const_reference,
                                          typename M::reference>::type reference;
        typedef typename M::const_pointer const_pointer;
        typedef typename boost::mpl::if_c<boost::is_const<M>::value,
                                          typename M::const_pointer,
                                          typename M::pointer>::type pointer;
#endif
#ifndef BOOST_UBLAS_CT_PROXY_CLOSURE_TYPEDEFS
        typedef typename M::closure_type matrix_closure_type;
#else
        typedef typename boost::mpl::if_c<boost::is_const<M>::value,
                                          typename M::const_closure_type,
                                          typename M::closure_type>::type matrix_closure_type;
#endif
        typedef const matrix_vector_slice<matrix_type> const_self_type;
        typedef matrix_vector_slice<matrix_type> self_type;
        typedef const_self_type const_closure_type;
        typedef self_type closure_type;
        typedef slice::const_iterator const_iterator1_type;
        typedef slice::const_iterator iterator1_type;
        typedef slice::const_iterator const_iterator2_type;
        typedef slice::const_iterator iterator2_type;
        typedef typename storage_restrict_traits<typename M::storage_category,
                                                 dense_proxy_tag>::storage_category storage_category;

        // Construction and destruction
        BOOST_UBLAS_INLINE
        matrix_vector_slice ():
            data_ (nil_), s1_ (), s2_ () {}
        BOOST_UBLAS_INLINE
        matrix_vector_slice (matrix_type &data, const slice &s1, const slice &s2):
            data_ (data), s1_ (s1.preprocess (data.size1 ())), s2_ (s2.preprocess (data.size2 ())) {
            // Early checking of preconditions.
            BOOST_UBLAS_CHECK (s1_.start () <= data_.size1 () &&
                               s1_.start () + s1_.stride () * (s1_.size () - (s1_.size () > 0)) <= data_.size1 (), bad_index ());
            BOOST_UBLAS_CHECK (s2_.start () <= data_.size2 () &&
                               s2_.start () + s2_.stride () * (s2_.size () - (s2_.size () > 0)) <= data_.size2 (), bad_index ());
            // One of the slices may be stationary.
            // Thanks to Michael Stevens for this extension.
            BOOST_UBLAS_CHECK ((s1_.stride () != 0 || s2_.stride () != 0) &&
                               s1_.size () == s2_.size (), bad_size ());
        }

        // Accessors
        BOOST_UBLAS_INLINE
        size_type start1 () const {
            return s1_.start ();
        }
        BOOST_UBLAS_INLINE
        size_type start2 () const {
            return s2_.start ();
        }
        BOOST_UBLAS_INLINE
        difference_type stride1 () const {
            return s1_.stride ();
        }
        BOOST_UBLAS_INLINE
        difference_type stride2 () const {
            return s2_.stride ();
        }
        BOOST_UBLAS_INLINE
        size_type size () const {
            return BOOST_UBLAS_SAME (s1_.size (), s2_.size ());
        }
        BOOST_UBLAS_INLINE
        const matrix_closure_type &data () const {
            return data_;
        }
        BOOST_UBLAS_INLINE
        matrix_closure_type &data () {
            return data_;
        }

#ifdef BOOST_UBLAS_DEPRECATED
        // Resetting
        BOOST_UBLAS_INLINE
        void reset (matrix_type &data) {
            // data_ = data;
            data_.reset (data);
        }
        BOOST_UBLAS_INLINE
        void reset (matrix_type &data, const slice &s1, const slice &s2) {
            // data_ = data;
            data_.reset (data);
            s1_ = s1;
            s2_ = s2;
        }
#endif

        // Element access
#ifndef BOOST_UBLAS_PROXY_CONST_MEMBER
        BOOST_UBLAS_INLINE
        const_reference operator () (size_type i) const {
            return data () (s1_ (i), s2_ (i));
        }
        BOOST_UBLAS_INLINE
        reference operator () (size_type i) {
            return data () (s1_ (i), s2_ (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 () (s1_ (i), s2_ (i));
        }

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

        // Assignment
        BOOST_UBLAS_INLINE
        matrix_vector_slice &operator = (const matrix_vector_slice &mvs) { 
            // FIXME: the slices could be differently sized.
            // std::copy (mvs.begin (), mvs.end (), begin ());
            vector_assign (scalar_assign<reference, value_type> (), *this, vector<value_type> (mvs));
            return *this;
        }
        BOOST_UBLAS_INLINE
        matrix_vector_slice &assign_temporary (matrix_vector_slice &mvs) {
            // FIXME: this is suboptimal.
            // return *this = mvs;
            vector_assign (scalar_assign<reference, value_type> (), *this, mvs);
            return *this;
        }
        template<class AE>
        BOOST_UBLAS_INLINE
        matrix_vector_slice &operator = (const vector_expression<AE> &ae) {
            vector_assign (scalar_assign<reference, value_type> (