sl@0: //
sl@0: //  Copyright (c) 2000-2002
sl@0: //  Joerg Walter, Mathias Koch
sl@0: //
sl@0: //  Permission to use, copy, modify, distribute and sell this software
sl@0: //  and its documentation for any purpose is hereby granted without fee,
sl@0: //  provided that the above copyright notice appear in all copies and
sl@0: //  that both that copyright notice and this permission notice appear
sl@0: //  in supporting documentation.  The authors make no representations
sl@0: //  about the suitability of this software for any purpose.
sl@0: //  It is provided "as is" without express or implied warranty.
sl@0: //
sl@0: //  The authors gratefully acknowledge the support of
sl@0: //  GeNeSys mbH & Co. KG in producing this work.
sl@0: //
sl@0: 
sl@0: #ifndef _BOOST_UBLAS_MATRIX_
sl@0: #define _BOOST_UBLAS_MATRIX_
sl@0: 
sl@0: #include <boost/numeric/ublas/vector.hpp>
sl@0: #include <boost/numeric/ublas/matrix_expression.hpp>
sl@0: #include <boost/numeric/ublas/detail/matrix_assign.hpp>
sl@0: 
sl@0: // Iterators based on ideas of Jeremy Siek
sl@0: 
sl@0: namespace boost { namespace numeric { namespace ublas {
sl@0: 
sl@0:     namespace detail {
sl@0:         using namespace boost::numeric::ublas;
sl@0: 
sl@0:         // Matrix resizing algorithm
sl@0:         template <class L, class M>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void matrix_resize_preserve (M& m, M& temporary) {
sl@0:             typedef L layout_type;
sl@0:             typedef typename M::size_type size_type;
sl@0:             const size_type msize1 (m.size1 ());        // original size
sl@0:             const size_type msize2 (m.size2 ());
sl@0:             const size_type size1 (temporary.size1 ());    // new size is specified by temporary
sl@0:             const size_type size2 (temporary.size2 ());
sl@0:             // Common elements to preserve
sl@0:             const size_type size1_min = (std::min) (size1, msize1);
sl@0:             const size_type size2_min = (std::min) (size2, msize2);
sl@0:             // Order loop for i-major and j-minor sizes
sl@0:             const size_type i_size = layout_type::size1 (size1_min, size2_min);
sl@0:             const size_type j_size = layout_type::size2 (size1_min, size2_min);
sl@0:             for (size_type i = 0; i != i_size; ++i) {    // indexing copy over major
sl@0:                 for (size_type j = 0; j != j_size; ++j) {
sl@0:                     const size_type element1 = layout_type::element1(i,i_size, j,j_size);
sl@0:                     const size_type element2 = layout_type::element2(i,i_size, j,j_size);
sl@0:                     temporary.data () [layout_type::element (element1, size1, element2, size2)] =
sl@0:                             m.data() [layout_type::element (element1, msize1, element2, msize2)];
sl@0:                 }
sl@0:             }
sl@0:             m.assign_temporary (temporary);
sl@0:         }
sl@0:     }
sl@0: 
sl@0: 
sl@0:     // Array based matrix class
sl@0:     template<class T, class L, class A>
sl@0:     class matrix:
sl@0:         public matrix_container<matrix<T, L, A> > {
sl@0: 
sl@0:         typedef T *pointer;
sl@0:         typedef L layout_type;
sl@0:         typedef matrix<T, L, A> self_type;
sl@0:     public:
sl@0: #ifdef BOOST_UBLAS_ENABLE_PROXY_SHORTCUTS
sl@0:         using matrix_container<self_type>::operator ();
sl@0: #endif
sl@0:         typedef typename A::size_type size_type;
sl@0:         typedef typename A::difference_type difference_type;
sl@0:         typedef T value_type;
sl@0:         typedef const T &const_reference;
sl@0:         typedef T &reference;
sl@0:         typedef A array_type;
sl@0:         typedef const matrix_reference<const self_type> const_closure_type;
sl@0:         typedef matrix_reference<self_type> closure_type;
sl@0:         typedef vector<T, A> vector_temporary_type;
sl@0:         typedef self_type matrix_temporary_type;
sl@0:         typedef dense_tag storage_category;
sl@0:         // This could be better for performance,
sl@0:         // typedef typename unknown_orientation_tag orientation_category;
sl@0:         // but others depend on the orientation information...
sl@0:         typedef typename L::orientation_category orientation_category;
sl@0: 
sl@0:         // Construction and destruction
sl@0:         BOOST_UBLAS_INLINE
sl@0:         matrix ():
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (0), size2_ (0), data_ () {}
sl@0:         BOOST_UBLAS_INLINE
sl@0:         matrix (size_type size1, size_type size2):
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (size1), size2_ (size2), data_ (layout_type::storage_size (size1, size2)) {
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         matrix (size_type size1, size_type size2, const array_type &data):
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (size1), size2_ (size2), data_ (data) {}
sl@0:         BOOST_UBLAS_INLINE
sl@0:         matrix (const matrix &m):
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (m.size1_), size2_ (m.size2_), data_ (m.data_) {}
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         matrix (const matrix_expression<AE> &ae):
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (ae ().size1 ()), size2_ (ae ().size2 ()), data_ (layout_type::storage_size (size1_, size2_)) {
sl@0:             matrix_assign<scalar_assign> (*this, ae);
sl@0:         }
sl@0: 
sl@0:         // Accessors
sl@0:         BOOST_UBLAS_INLINE
sl@0:         size_type size1 () const {
sl@0:             return size1_;
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         size_type size2 () const {
sl@0:             return size2_;
sl@0:         }
sl@0: 
sl@0:         // Storage accessors
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const array_type &data () const {
sl@0:             return data_;
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         array_type &data () {
sl@0:             return data_;
sl@0:         }
sl@0: 
sl@0:         // Resizing
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void resize (size_type size1, size_type size2, bool preserve = true) {
sl@0:             if (preserve) {
sl@0:                 self_type temporary (size1, size2);
sl@0:                 detail::matrix_resize_preserve<layout_type> (*this, temporary);
sl@0:             }
sl@0:             else {
sl@0:                 data ().resize (layout_type::storage_size (size1, size2));
sl@0:                 size1_ = size1;
sl@0:                 size2_ = size2;
sl@0:             }
sl@0:         }
sl@0: 
sl@0:         // Element access
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reference operator () (size_type i, size_type j) const {
sl@0:             return data () [layout_type::element (i, size1_, j, size2_)];
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reference at_element (size_type i, size_type j) {
sl@0:             return data () [layout_type::element (i, size1_, j, size2_)];
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reference operator () (size_type i, size_type j) {
sl@0:             return at_element (i, j);
sl@0:         }
sl@0: 
sl@0:         // Element assignment
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reference insert_element (size_type i, size_type j, const_reference t) {
sl@0:             return (at_element (i, j) = t);
sl@0:         }
sl@0:         void erase_element (size_type i, size_type j) {
sl@0:             at_element (i, j) = value_type/*zero*/();
sl@0:         }
sl@0: 
sl@0:         // Zeroing
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void clear () {
sl@0:             std::fill (data ().begin (), data ().end (), value_type/*zero*/());
sl@0:         }
sl@0: 
sl@0:         // Assignment
sl@0:         BOOST_UBLAS_INLINE
sl@0:         matrix &operator = (const matrix &m) {
sl@0:             size1_ = m.size1_;
sl@0:             size2_ = m.size2_;
sl@0:             data () = m.data ();
sl@0:             return *this;
sl@0:         }
sl@0:         template<class C>          // Container assignment without temporary
sl@0:         BOOST_UBLAS_INLINE
sl@0:         matrix &operator = (const matrix_container<C> &m) {
sl@0:             resize (m ().size1 (), m ().size2 (), false);
sl@0:             assign (m);
sl@0:             return *this;
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         matrix &assign_temporary (matrix &m) {
sl@0:             swap (m);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         matrix &operator = (const matrix_expression<AE> &ae) {
sl@0:             self_type temporary (ae);
sl@0:             return assign_temporary (temporary);
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         matrix &assign (const matrix_expression<AE> &ae) {
sl@0:             matrix_assign<scalar_assign> (*this, ae);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         matrix& operator += (const matrix_expression<AE> &ae) {
sl@0:             self_type temporary (*this + ae);
sl@0:             return assign_temporary (temporary);
sl@0:         }
sl@0:         template<class C>          // Container assignment without temporary
sl@0:         BOOST_UBLAS_INLINE
sl@0:         matrix &operator += (const matrix_container<C> &m) {
sl@0:             plus_assign (m);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         matrix &plus_assign (const matrix_expression<AE> &ae) {
sl@0:             matrix_assign<scalar_plus_assign> (*this, ae);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         matrix& operator -= (const matrix_expression<AE> &ae) {
sl@0:             self_type temporary (*this - ae);
sl@0:             return assign_temporary (temporary);
sl@0:         }
sl@0:         template<class C>          // Container assignment without temporary
sl@0:         BOOST_UBLAS_INLINE
sl@0:         matrix &operator -= (const matrix_container<C> &m) {
sl@0:             minus_assign (m);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         matrix &minus_assign (const matrix_expression<AE> &ae) {
sl@0:             matrix_assign<scalar_minus_assign> (*this, ae);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AT>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         matrix& operator *= (const AT &at) {
sl@0:             matrix_assign_scalar<scalar_multiplies_assign> (*this, at);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AT>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         matrix& operator /= (const AT &at) {
sl@0:             matrix_assign_scalar<scalar_divides_assign> (*this, at);
sl@0:             return *this;
sl@0:         }
sl@0: 
sl@0:         // Swapping
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void swap (matrix &m) {
sl@0:             if (this != &m) {
sl@0:                 std::swap (size1_, m.size1_);
sl@0:                 std::swap (size2_, m.size2_);
sl@0:                 data ().swap (m.data ());
sl@0:             }
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         friend void swap (matrix &m1, matrix &m2) {
sl@0:             m1.swap (m2);
sl@0:         }
sl@0: 
sl@0:         // Iterator types
sl@0:     private:
sl@0:         // Use the storage array iterator
sl@0:         typedef typename A::const_iterator const_subiterator_type;
sl@0:         typedef typename A::iterator subiterator_type;
sl@0: 
sl@0:     public:
sl@0: #ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:         typedef indexed_iterator1<self_type, dense_random_access_iterator_tag> iterator1;
sl@0:         typedef indexed_iterator2<self_type, dense_random_access_iterator_tag> iterator2;
sl@0:         typedef indexed_const_iterator1<self_type, dense_random_access_iterator_tag> const_iterator1;
sl@0:         typedef indexed_const_iterator2<self_type, dense_random_access_iterator_tag> const_iterator2;
sl@0: #else
sl@0:         class const_iterator1;
sl@0:         class iterator1;
sl@0:         class const_iterator2;
sl@0:         class iterator2;
sl@0: #endif
sl@0:         typedef reverse_iterator_base1<const_iterator1> const_reverse_iterator1;
sl@0:         typedef reverse_iterator_base1<iterator1> reverse_iterator1;
sl@0:         typedef reverse_iterator_base2<const_iterator2> const_reverse_iterator2;
sl@0:         typedef reverse_iterator_base2<iterator2> reverse_iterator2;
sl@0: 
sl@0:         // Element lookup
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator1 find1 (int /* rank */, size_type i, size_type j) const {
sl@0: #ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:             return const_iterator1 (*this, i, j);
sl@0: #else
sl@0:             return const_iterator1 (*this, data ().begin () + layout_type::address (i, size1_, j, size2_));
sl@0: #endif
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         iterator1 find1 (int /* rank */, size_type i, size_type j) {
sl@0: #ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:             return iterator1 (*this, i, j);
sl@0: #else
sl@0:             return iterator1 (*this, data ().begin () + layout_type::address (i, size1_, j, size2_));
sl@0: #endif
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator2 find2 (int /* rank */, size_type i, size_type j) const {
sl@0: #ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:             return const_iterator2 (*this, i, j);
sl@0: #else
sl@0:             return const_iterator2 (*this, data ().begin () + layout_type::address (i, size1_, j, size2_));
sl@0: #endif
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         iterator2 find2 (int /* rank */, size_type i, size_type j) {
sl@0: #ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:             return iterator2 (*this, i, j);
sl@0: #else
sl@0:             return iterator2 (*this, data ().begin () + layout_type::address (i, size1_, j, size2_));
sl@0: #endif
sl@0:         }
sl@0: 
sl@0: 
sl@0: #ifndef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:         class const_iterator1:
sl@0:             public container_const_reference<matrix>,
sl@0:             public random_access_iterator_base<dense_random_access_iterator_tag,
sl@0:                                                const_iterator1, value_type> {
sl@0:         public:
sl@0:             typedef typename matrix::value_type value_type;
sl@0:             typedef typename matrix::difference_type difference_type;
sl@0:             typedef typename matrix::const_reference reference;
sl@0:             typedef const typename matrix::pointer pointer;
sl@0: 
sl@0:             typedef const_iterator2 dual_iterator_type;
sl@0:             typedef const_reverse_iterator2 dual_reverse_iterator_type;
sl@0: 
sl@0:             // Construction and destruction
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 ():
sl@0:                 container_const_reference<self_type> (), it_ () {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 (const self_type &m, const const_subiterator_type &it):
sl@0:                 container_const_reference<self_type> (m), it_ (it) {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 (const iterator1 &it):
sl@0:                 container_const_reference<self_type> (it ()), it_ (it.it_) {}
sl@0: 
sl@0:             // Arithmetic
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator ++ () {
sl@0:                 layout_type::increment1 (it_, (*this) ().size1 (), (*this) ().size2 ());
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator -- () {
sl@0:                 layout_type::decrement1 (it_, (*this) ().size1 (), (*this) ().size2 ());
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator += (difference_type n) {
sl@0:                 it_ += n * layout_type::one1 ((*this) ().size1 (), (*this) ().size2 ());
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator -= (difference_type n) {
sl@0:                 it_ -= n * layout_type::one1 ((*this) ().size1 (), (*this) ().size2 ());
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             difference_type operator - (const const_iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return layout_type::distance1 (it_ - it.it_, (*this) ().size1 (), (*this) ().size2 ());
sl@0:             }
sl@0: 
sl@0:             // Dereference
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator * () const {
sl@0:                 BOOST_UBLAS_CHECK (index1 () < (*this) ().size1 (), bad_index ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () < (*this) ().size2 (), bad_index ());
sl@0:                 return *it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator [] (difference_type n) const {
sl@0:                 return *(*this + n);
sl@0:             }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator2 begin () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return m.find2 (1, index1 (), 0);
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator2 end () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return m.find2 (1, index1 (), m.size2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator2 rbegin () const {
sl@0:                 return const_reverse_iterator2 (end ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator2 rend () const {
sl@0:                 return const_reverse_iterator2 (begin ());
sl@0:             }
sl@0: #endif
sl@0: 
sl@0:             // Indices
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index1 () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return layout_type::index1 (it_ - m.begin1 ().it_, m.size1 (), m.size2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index2 () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return layout_type::index2 (it_ - m.begin1 ().it_, m.size1 (), m.size2 ());
sl@0:             }
sl@0: 
sl@0:             // Assignment
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator = (const const_iterator1 &it) {
sl@0:                 container_const_reference<self_type>::assign (&it ());
sl@0:                 it_ = it.it_;
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Comparison
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator == (const const_iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ == it.it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator < (const const_iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ < it.it_;
sl@0:             }
sl@0: 
sl@0:         private:
sl@0:             const_subiterator_type it_;
sl@0: 
sl@0:             friend class iterator1;
sl@0:         };
sl@0: #endif
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator1 begin1 () const {
sl@0:             return find1 (0, 0, 0);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator1 end1 () const {
sl@0:             return find1 (0, size1_, 0);
sl@0:         }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:         class iterator1:
sl@0:             public container_reference<matrix>,
sl@0:             public random_access_iterator_base<dense_random_access_iterator_tag,
sl@0:                                                iterator1, value_type> {
sl@0:         public:
sl@0:             typedef typename matrix::value_type value_type;
sl@0:             typedef typename matrix::difference_type difference_type;
sl@0:             typedef typename matrix::reference reference;
sl@0:             typedef typename matrix::pointer pointer;
sl@0: 
sl@0:             typedef iterator2 dual_iterator_type;
sl@0:             typedef reverse_iterator2 dual_reverse_iterator_type;
sl@0: 
sl@0:             // Construction and destruction
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 ():
sl@0:                 container_reference<self_type> (), it_ () {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 (self_type &m, const subiterator_type &it):
sl@0:                 container_reference<self_type> (m), it_ (it) {}
sl@0: 
sl@0:             // Arithmetic
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 &operator ++ () {
sl@0:                 layout_type::increment1 (it_, (*this) ().size1 (), (*this) ().size2 ());
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 &operator -- () {
sl@0:                 layout_type::decrement1 (it_, (*this) ().size1 (), (*this) ().size2 ());
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 &operator += (difference_type n) {
sl@0:                 it_ += n * layout_type::one1 ((*this) ().size1 (), (*this) ().size2 ());
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 &operator -= (difference_type n) {
sl@0:                 it_ -= n * layout_type::one1 ((*this) ().size1 (), (*this) ().size2 ());
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             difference_type operator - (const iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return layout_type::distance1 (it_ - it.it_, (*this) ().size1 (), (*this) ().size2 ());
sl@0:             }
sl@0: 
sl@0:             // Dereference
sl@0:             BOOST_UBLAS_INLINE
sl@0:             reference operator * () const {
sl@0:                 BOOST_UBLAS_CHECK (index1 () < (*this) ().size1 (), bad_index ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () < (*this) ().size2 (), bad_index ());
sl@0:                 return *it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             reference operator [] (difference_type n) const {
sl@0:                 return *(*this + n);
sl@0:             }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             iterator2 begin () const {
sl@0:                 self_type &m = (*this) ();
sl@0:                 return m.find2 (1, index1 (), 0);
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             iterator2 end () const {
sl@0:                 self_type &m = (*this) ();
sl@0:                 return m.find2 (1, index1 (), m.size2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             reverse_iterator2 rbegin () const {
sl@0:                 return reverse_iterator2 (end ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             reverse_iterator2 rend () const {
sl@0:                 return reverse_iterator2 (begin ());
sl@0:             }
sl@0: #endif
sl@0: 
sl@0:             // Indices
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index1 () const {
sl@0:                 self_type &m = (*this) ();
sl@0:                 return layout_type::index1 (it_ - m.begin1 ().it_, m.size1 (), m.size2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index2 () const {
sl@0:                 self_type &m = (*this) ();
sl@0:                 return layout_type::index2 (it_ - m.begin1 ().it_, m.size1 (), m.size2 ());
sl@0:             }
sl@0: 
sl@0:             // Assignment
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 &operator = (const iterator1 &it) {
sl@0:                 container_reference<self_type>::assign (&it ());
sl@0:                 it_ = it.it_;
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Comparison
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator == (const iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ == it.it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator < (const iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ < it.it_;
sl@0:             }
sl@0: 
sl@0:         private:
sl@0:             subiterator_type it_;
sl@0: 
sl@0:             friend class const_iterator1;
sl@0:         };
sl@0: #endif
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         iterator1 begin1 () {
sl@0:             return find1 (0, 0, 0);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         iterator1 end1 () {
sl@0:             return find1 (0, size1_, 0);
sl@0:         }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:         class const_iterator2:
sl@0:             public container_const_reference<matrix>,
sl@0:             public random_access_iterator_base<dense_random_access_iterator_tag,
sl@0:                                                const_iterator2, value_type> {
sl@0:         public:
sl@0:             typedef typename matrix::value_type value_type;
sl@0:             typedef typename matrix::difference_type difference_type;
sl@0:             typedef typename matrix::const_reference reference;
sl@0:             typedef const typename matrix::pointer pointer;
sl@0: 
sl@0:             typedef const_iterator1 dual_iterator_type;
sl@0:             typedef const_reverse_iterator1 dual_reverse_iterator_type;
sl@0: 
sl@0:             // Construction and destruction
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 ():
sl@0:                 container_const_reference<self_type> (), it_ () {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 (const self_type &m, const const_subiterator_type &it):
sl@0:                 container_const_reference<self_type> (m), it_ (it) {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 (const iterator2 &it):
sl@0:                 container_const_reference<self_type> (it ()), it_ (it.it_) {}
sl@0: 
sl@0:             // Arithmetic
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator ++ () {
sl@0:                 layout_type::increment2 (it_, (*this) ().size1 (), (*this) ().size2 ());
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator -- () {
sl@0:                 layout_type::decrement2 (it_, (*this) ().size1 (), (*this) ().size2 ());
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator += (difference_type n) {
sl@0:                 it_ += n * layout_type::one2 ((*this) ().size1 (), (*this) ().size2 ());
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator -= (difference_type n) {
sl@0:                 it_ -= n * layout_type::one2 ((*this) ().size1 (), (*this) ().size2 ());
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             difference_type operator - (const const_iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return layout_type::distance2 (it_ - it.it_, (*this) ().size1 (), (*this) ().size2 ());
sl@0:             }
sl@0: 
sl@0:             // Dereference
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator * () const {
sl@0:                 BOOST_UBLAS_CHECK (index1 () < (*this) ().size1 (), bad_index ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () < (*this) ().size2 (), bad_index ());
sl@0:                 return *it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator [] (difference_type n) const {
sl@0:                 return *(*this + n);
sl@0:             }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator1 begin () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return m.find1 (1, 0, index2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator1 end () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return m.find1 (1, m.size1 (), index2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator1 rbegin () const {
sl@0:                 return const_reverse_iterator1 (end ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator1 rend () const {
sl@0:                 return const_reverse_iterator1 (begin ());
sl@0:             }
sl@0: #endif
sl@0: 
sl@0:             // Indices
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index1 () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return layout_type::index1 (it_ - m.begin2 ().it_, m.size1 (), m.size2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index2 () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return layout_type::index2 (it_ - m.begin2 ().it_, m.size1 (), m.size2 ());
sl@0:             }
sl@0: 
sl@0:             // Assignment
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator = (const const_iterator2 &it) {
sl@0:                 container_const_reference<self_type>::assign (&it ());
sl@0:                 it_ = it.it_;
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Comparison
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator == (const const_iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ == it.it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator < (const const_iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ < it.it_;
sl@0:             }
sl@0: 
sl@0:         private:
sl@0:             const_subiterator_type it_;
sl@0: 
sl@0:             friend class iterator2;
sl@0:         };
sl@0: #endif
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator2 begin2 () const {
sl@0:             return find2 (0, 0, 0);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator2 end2 () const {
sl@0:             return find2 (0, 0, size2_);
sl@0:         }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:         class iterator2:
sl@0:             public container_reference<matrix>,
sl@0:             public random_access_iterator_base<dense_random_access_iterator_tag,
sl@0:                                                iterator2, value_type> {
sl@0:         public:
sl@0:             typedef typename matrix::value_type value_type;
sl@0:             typedef typename matrix::difference_type difference_type;
sl@0:             typedef typename matrix::reference reference;
sl@0:             typedef typename matrix::pointer pointer;
sl@0: 
sl@0:             typedef iterator1 dual_iterator_type;
sl@0:             typedef reverse_iterator1 dual_reverse_iterator_type;
sl@0: 
sl@0:             // Construction and destruction
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 ():
sl@0:                 container_reference<self_type> (), it_ () {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 (self_type &m, const subiterator_type &it):
sl@0:                 container_reference<self_type> (m), it_ (it) {}
sl@0: 
sl@0:             // Arithmetic
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 &operator ++ () {
sl@0:                 layout_type::increment2 (it_, (*this) ().size1 (), (*this) ().size2 ());
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 &operator -- () {
sl@0:                 layout_type::decrement2 (it_, (*this) ().size1 (), (*this) ().size2 ());
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 &operator += (difference_type n) {
sl@0:                 it_ += n * layout_type::one2 ((*this) ().size1 (), (*this) ().size2 ());
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 &operator -= (difference_type n) {
sl@0:                 it_ -= n * layout_type::one2 ((*this) ().size1 (), (*this) ().size2 ());
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             difference_type operator - (const iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return layout_type::distance2 (it_ - it.it_, (*this) ().size1 (), (*this) ().size2 ());
sl@0:             }
sl@0: 
sl@0:             // Dereference
sl@0:             BOOST_UBLAS_INLINE
sl@0:             reference operator * () const {
sl@0:                 BOOST_UBLAS_CHECK (index1 () < (*this) ().size1 (), bad_index ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () < (*this) ().size2 (), bad_index ());
sl@0:                 return *it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             reference operator [] (difference_type n) const {
sl@0:                 return *(*this + n);
sl@0:             }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             iterator1 begin () const {
sl@0:                 self_type &m = (*this) ();
sl@0:                 return m.find1 (1, 0, index2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             iterator1 end () const {
sl@0:                 self_type &m = (*this) ();
sl@0:                 return m.find1 (1, m.size1 (), index2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             reverse_iterator1 rbegin () const {
sl@0:                 return reverse_iterator1 (end ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             reverse_iterator1 rend () const {
sl@0:                 return reverse_iterator1 (begin ());
sl@0:             }
sl@0: #endif
sl@0: 
sl@0:             // Indices
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index1 () const {
sl@0:                 self_type &m = (*this) ();
sl@0:                 return layout_type::index1 (it_ - m.begin2 ().it_, m.size1 (), m.size2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index2 () const {
sl@0:                 self_type &m = (*this) ();
sl@0:                 return layout_type::index2 (it_ - m.begin2 ().it_, m.size1 (), m.size2 ());
sl@0:             }
sl@0: 
sl@0:             // Assignment
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 &operator = (const iterator2 &it) {
sl@0:                 container_reference<self_type>::assign (&it ());
sl@0:                 it_ = it.it_;
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Comparison
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator == (const iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ == it.it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator < (const iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ < it.it_;
sl@0:             }
sl@0: 
sl@0:         private:
sl@0:             subiterator_type it_;
sl@0: 
sl@0:             friend class const_iterator2;
sl@0:         };
sl@0: #endif
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         iterator2 begin2 () {
sl@0:             return find2 (0, 0, 0);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         iterator2 end2 () {
sl@0:             return find2 (0, 0, size2_);
sl@0:         }
sl@0: 
sl@0:         // Reverse iterators
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator1 rbegin1 () const {
sl@0:             return const_reverse_iterator1 (end1 ());
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator1 rend1 () const {
sl@0:             return const_reverse_iterator1 (begin1 ());
sl@0:         }
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reverse_iterator1 rbegin1 () {
sl@0:             return reverse_iterator1 (end1 ());
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reverse_iterator1 rend1 () {
sl@0:             return reverse_iterator1 (begin1 ());
sl@0:         }
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator2 rbegin2 () const {
sl@0:             return const_reverse_iterator2 (end2 ());
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator2 rend2 () const {
sl@0:             return const_reverse_iterator2 (begin2 ());
sl@0:         }
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reverse_iterator2 rbegin2 () {
sl@0:             return reverse_iterator2 (end2 ());
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reverse_iterator2 rend2 () {
sl@0:             return reverse_iterator2 (begin2 ());
sl@0:         }
sl@0: 
sl@0:     private:
sl@0:         size_type size1_;
sl@0:         size_type size2_;
sl@0:         array_type data_;
sl@0:     };
sl@0: 
sl@0: 
sl@0:     // Bounded matrix class
sl@0:     template<class T, std::size_t M, std::size_t N, class L>
sl@0:     class bounded_matrix:
sl@0:         public matrix<T, L, bounded_array<T, M * N> > {
sl@0: 
sl@0:         typedef matrix<T, L, bounded_array<T, M * N> > matrix_type;
sl@0:     public:
sl@0:         typedef typename matrix_type::size_type size_type;
sl@0:         static const size_type max_size1 = M;
sl@0:         static const size_type max_size2 = N;
sl@0: 
sl@0:         // Construction and destruction
sl@0:         BOOST_UBLAS_INLINE
sl@0:         bounded_matrix ():
sl@0:             matrix_type (M, N) {}
sl@0:         BOOST_UBLAS_INLINE
sl@0:         bounded_matrix (size_type size1, size_type size2):
sl@0:             matrix_type (size1, size2) {}
sl@0:         BOOST_UBLAS_INLINE
sl@0:         bounded_matrix (const bounded_matrix &m):
sl@0:             matrix_type (m) {}
sl@0:         template<class A2>              // Allow matrix<T, L, bounded_array<M,N> > construction
sl@0:         BOOST_UBLAS_INLINE
sl@0:         bounded_matrix (const matrix<T, L, A2> &m):
sl@0:             matrix_type (m) {}
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         bounded_matrix (const matrix_expression<AE> &ae):
sl@0:             matrix_type (ae) {}
sl@0:         BOOST_UBLAS_INLINE
sl@0:         ~bounded_matrix () {}
sl@0: 
sl@0:         // Assignment
sl@0:         BOOST_UBLAS_INLINE
sl@0:         bounded_matrix &operator = (const bounded_matrix &m) {
sl@0:             matrix_type::operator = (m);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class L2, class A2>        // Generic matrix assignment
sl@0:         BOOST_UBLAS_INLINE
sl@0:         bounded_matrix &operator = (const matrix<T, L2, A2> &m) {
sl@0:             matrix_type::operator = (m);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class C>          // Container assignment without temporary
sl@0:         BOOST_UBLAS_INLINE
sl@0:         bounded_matrix &operator = (const matrix_container<C> &m) {
sl@0:             matrix_type::operator = (m);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         bounded_matrix &operator = (const matrix_expression<AE> &ae) {
sl@0:             matrix_type::operator = (ae);
sl@0:             return *this;
sl@0:         }
sl@0:     };
sl@0: 
sl@0: 
sl@0:     // Array based matrix class
sl@0:     template<class T, class L, class A>
sl@0:     class vector_of_vector:
sl@0:         public matrix_container<vector_of_vector<T, L, A> > {
sl@0: 
sl@0:         typedef T *pointer;
sl@0:         typedef L layout_type;
sl@0:         typedef vector_of_vector<T, L, A> self_type;
sl@0:     public:
sl@0: #ifdef BOOST_UBLAS_ENABLE_PROXY_SHORTCUTS
sl@0:         using matrix_container<self_type>::operator ();
sl@0: #endif
sl@0:         typedef typename A::size_type size_type;
sl@0:         typedef typename A::difference_type difference_type;
sl@0:         typedef T value_type;
sl@0:         typedef const T &const_reference;
sl@0:         typedef T &reference;
sl@0:         typedef A array_type;
sl@0:         typedef const matrix_reference<const self_type> const_closure_type;
sl@0:         typedef matrix_reference<self_type> closure_type;
sl@0:         typedef vector<T, typename A::value_type> vector_temporary_type;
sl@0:         typedef self_type matrix_temporary_type;
sl@0:         typedef dense_tag storage_category;
sl@0:         // This could be better for performance,
sl@0:         // typedef typename unknown_orientation_tag orientation_category;
sl@0:         // but others depend on the orientation information...
sl@0:         typedef typename L::orientation_category orientation_category;
sl@0: 
sl@0:         // Construction and destruction
sl@0:         BOOST_UBLAS_INLINE
sl@0:         vector_of_vector ():
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (0), size2_ (0), data_ (1) {}
sl@0:         BOOST_UBLAS_INLINE
sl@0:         vector_of_vector (size_type size1, size_type size2):
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (size1), size2_ (size2), data_ (1) {
sl@0:             resize (size1, size2, true);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         vector_of_vector (const vector_of_vector &m):
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (m.size1_), size2_ (m.size2_), data_ (m.data_) {}
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         vector_of_vector (const matrix_expression<AE> &ae):
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (ae ().size1 ()), size2_ (ae ().size2 ()), data_ (layout_type::size1 (size1_, size2_) + 1) {
sl@0:             for (size_type k = 0; k < layout_type::size1 (size1_, size2_); ++ k)
sl@0:                 data ()[k].resize (layout_type::size2 (size1_, size2_));
sl@0:             matrix_assign<scalar_assign> (*this, ae);
sl@0:         }
sl@0: 
sl@0:         // Accessors
sl@0:         BOOST_UBLAS_INLINE
sl@0:         size_type size1 () const {
sl@0:             return size1_;
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         size_type size2 () const { 
sl@0:             return size2_;
sl@0:         }
sl@0: 
sl@0:         // Storage accessors
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const array_type &data () const {
sl@0:             return data_;
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         array_type &data () {
sl@0:             return data_;
sl@0:         }
sl@0: 
sl@0:         // Resizing
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void resize (size_type size1, size_type size2, bool preserve = true) {
sl@0:             size1_ = size1;
sl@0:             size2_ = size2;
sl@0:             if (preserve)
sl@0:                 data ().resize (layout_type::size1 (size1, size2) + 1, typename array_type::value_type ());
sl@0:             else
sl@0:                 data ().resize (layout_type::size1 (size1, size2) + 1);
sl@0:             for (size_type k = 0; k < layout_type::size1 (size1, size2); ++ k) {
sl@0:                 if (preserve)
sl@0:                     data () [k].resize (layout_type::size2 (size1, size2), value_type ());
sl@0:                 else
sl@0:                     data () [k].resize (layout_type::size2 (size1, size2));
sl@0:             }
sl@0:         }
sl@0: 
sl@0:         // Element access
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reference operator () (size_type i, size_type j) const {
sl@0:             return data () [layout_type::element1 (i, size1_, j, size2_)] [layout_type::element2 (i, size1_, j, size2_)]; 
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reference at_element (size_type i, size_type j) {
sl@0:             return data () [layout_type::element1 (i, size1_, j, size2_)] [layout_type::element2 (i, size1_, j, size2_)]; 
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reference operator () (size_type i, size_type j) {
sl@0:             return at_element (i, j); 
sl@0:         }
sl@0: 
sl@0:         // Element assignment
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reference insert_element (size_type i, size_type j, const_reference t) {
sl@0:             return (at_element (i, j) = t); 
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void erase_element (size_type i, size_type j) {
sl@0:             at_element (i, j) = value_type/*zero*/(); 
sl@0:         }
sl@0:         
sl@0:         // Zeroing
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void clear () {
sl@0:             for (size_type k = 0; k < layout_type::size1 (size1_, size2_); ++ k)
sl@0:                 std::fill (data () [k].begin (), data () [k].end (), value_type/*zero*/());
sl@0:         }
sl@0: 
sl@0:         // Assignment
sl@0:         BOOST_UBLAS_INLINE
sl@0:         vector_of_vector &operator = (const vector_of_vector &m) {
sl@0:             size1_ = m.size1_;
sl@0:             size2_ = m.size2_;
sl@0:             data () = m.data ();
sl@0:             return *this;
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         vector_of_vector &assign_temporary (vector_of_vector &m) { 
sl@0:             swap (m);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         vector_of_vector &operator = (const matrix_expression<AE> &ae) { 
sl@0:             self_type temporary (ae);
sl@0:             return assign_temporary (temporary);
sl@0:         }
sl@0:         template<class C>          // Container assignment without temporary
sl@0:         BOOST_UBLAS_INLINE
sl@0:         vector_of_vector &operator = (const matrix_container<C> &m) {
sl@0:             resize (m ().size1 (), m ().size2 (), false);
sl@0:             assign (m);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         vector_of_vector &assign (const matrix_expression<AE> &ae) { 
sl@0:             matrix_assign<scalar_assign> (*this, ae); 
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         vector_of_vector& operator += (const matrix_expression<AE> &ae) {
sl@0:             self_type temporary (*this + ae);
sl@0:             return assign_temporary (temporary);
sl@0:         }
sl@0:         template<class C>          // Container assignment without temporary
sl@0:         BOOST_UBLAS_INLINE
sl@0:         vector_of_vector &operator += (const matrix_container<C> &m) {
sl@0:             plus_assign (m);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         vector_of_vector &plus_assign (const matrix_expression<AE> &ae) { 
sl@0:             matrix_assign<scalar_plus_assign> (*this, ae); 
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         vector_of_vector& operator -= (const matrix_expression<AE> &ae) {
sl@0:             self_type temporary (*this - ae);
sl@0:             return assign_temporary (temporary);
sl@0:         }
sl@0:         template<class C>          // Container assignment without temporary
sl@0:         BOOST_UBLAS_INLINE
sl@0:         vector_of_vector &operator -= (const matrix_container<C> &m) {
sl@0:             minus_assign (m);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         vector_of_vector &minus_assign (const matrix_expression<AE> &ae) {
sl@0:             matrix_assign<scalar_minus_assign> (*this, ae); 
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AT>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         vector_of_vector& operator *= (const AT &at) {
sl@0:             matrix_assign_scalar<scalar_multiplies_assign> (*this, at);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AT>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         vector_of_vector& operator /= (const AT &at) {
sl@0:             matrix_assign_scalar<scalar_divides_assign> (*this, at);
sl@0:             return *this;
sl@0:         }
sl@0: 
sl@0:         // Swapping
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void swap (vector_of_vector &m) {
sl@0:             if (this != &m) {
sl@0:                 std::swap (size1_, m.size1_);
sl@0:                 std::swap (size2_, m.size2_);
sl@0:                 data ().swap (m.data ());
sl@0:             }
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         friend void swap (vector_of_vector &m1, vector_of_vector &m2) {
sl@0:             m1.swap (m2);
sl@0:         }
sl@0: 
sl@0:         // Iterator types
sl@0:     private:
sl@0:         // Use the vector iterator
sl@0:         typedef typename A::value_type::const_iterator const_subiterator_type;
sl@0:         typedef typename A::value_type::iterator subiterator_type;
sl@0:     public:
sl@0: #ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:         typedef indexed_iterator1<self_type, dense_random_access_iterator_tag> iterator1;
sl@0:         typedef indexed_iterator2<self_type, dense_random_access_iterator_tag> iterator2;
sl@0:         typedef indexed_const_iterator1<self_type, dense_random_access_iterator_tag> const_iterator1;
sl@0:         typedef indexed_const_iterator2<self_type, dense_random_access_iterator_tag> const_iterator2;
sl@0: #else
sl@0:         class const_iterator1;
sl@0:         class iterator1;
sl@0:         class const_iterator2;
sl@0:         class iterator2;
sl@0: #endif
sl@0:         typedef reverse_iterator_base1<const_iterator1> const_reverse_iterator1;
sl@0:         typedef reverse_iterator_base1<iterator1> reverse_iterator1;
sl@0:         typedef reverse_iterator_base2<const_iterator2> const_reverse_iterator2;
sl@0:         typedef reverse_iterator_base2<iterator2> reverse_iterator2;
sl@0: 
sl@0:         // Element lookup
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator1 find1 (int /*rank*/, size_type i, size_type j) const {
sl@0: #ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:             return const_iterator1 (*this, i, j);
sl@0: #else
sl@0:             return const_iterator1 (*this, i, j, data () [layout_type::address1 (i, size1_, j, size2_)].begin ()  + layout_type::address2 (i, size1_, j, size2_));
sl@0: #endif
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         iterator1 find1 (int /*rank*/, size_type i, size_type j) {
sl@0: #ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:             return iterator1 (*this, i, j);
sl@0: #else
sl@0:             return iterator1 (*this, i, j, data () [layout_type::address1 (i, size1_, j, size2_)].begin ()  + layout_type::address2 (i, size1_, j, size2_));
sl@0: #endif
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator2 find2 (int /*rank*/, size_type i, size_type j) const {
sl@0: #ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:             return const_iterator2 (*this, i, j);
sl@0: #else
sl@0:             return const_iterator2 (*this, i, j, data () [layout_type::address1 (i, size1_, j, size2_)].begin ()  + layout_type::address2 (i, size1_, j, size2_));
sl@0: #endif
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         iterator2 find2 (int /*rank*/, size_type i, size_type j) {
sl@0: #ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:             return iterator2 (*this, i, j);
sl@0: #else
sl@0:             return iterator2 (*this, i, j, data () [layout_type::address1 (i, size1_, j, size2_)].begin () + layout_type::address2 (i, size1_, j, size2_));
sl@0: #endif
sl@0:         }
sl@0: 
sl@0: 
sl@0: #ifndef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:         class const_iterator1:
sl@0:             public container_const_reference<vector_of_vector>,
sl@0:             public random_access_iterator_base<dense_random_access_iterator_tag,
sl@0:                                                const_iterator1, value_type> {
sl@0:         public:
sl@0:             typedef typename vector_of_vector::value_type value_type;
sl@0:             typedef typename vector_of_vector::difference_type difference_type;
sl@0:             typedef typename vector_of_vector::const_reference reference;
sl@0:             typedef const typename vector_of_vector::pointer pointer;
sl@0: 
sl@0:             typedef const_iterator2 dual_iterator_type;
sl@0:             typedef const_reverse_iterator2 dual_reverse_iterator_type;
sl@0: 
sl@0:             // Construction and destruction
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 ():
sl@0:                 container_const_reference<self_type> (), i_ (), j_ (), it_ () {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 (const self_type &m, size_type i, size_type j, const const_subiterator_type &it):
sl@0:                 container_const_reference<self_type> (m), i_ (i), j_ (j), it_ (it) {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 (const iterator1 &it):
sl@0:                 container_const_reference<self_type> (it ()), i_ (it.i_), j_ (it.j_), it_ (it.it_) {}
sl@0: 
sl@0:             // Arithmetic
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator ++ () {
sl@0:                 ++ i_;
sl@0:                 const self_type &m = (*this) ();
sl@0:                 if (layout_type::fast1 ())
sl@0:                     ++ it_;
sl@0:                 else 
sl@0:                     it_ = m.find1 (1, i_, j_).it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator -- () {
sl@0:                 -- i_;
sl@0:                 const self_type &m = (*this) ();
sl@0:                 if (layout_type::fast1 ())
sl@0:                     -- it_;
sl@0:                 else
sl@0:                     it_ = m.find1 (1, i_, j_).it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator += (difference_type n) {
sl@0:                 i_ += n;
sl@0:                 const self_type &m = (*this) ();
sl@0:                 it_ = m.find1 (1, i_, j_).it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator -= (difference_type n) {
sl@0:                 i_ -= n;
sl@0:                 const self_type &m = (*this) ();
sl@0:                 it_ = m.find1 (1, i_, j_).it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             difference_type operator - (const const_iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () == it.index2 (), bad_index ());
sl@0:                 return index1 () - it.index1 ();
sl@0:             }
sl@0: 
sl@0:             // Dereference
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator * () const {
sl@0:                 BOOST_UBLAS_CHECK (index1 () < (*this) ().size1 (), bad_index ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () < (*this) ().size2 (), bad_index ());
sl@0:                 return *it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator [] (difference_type n) const {
sl@0:                 return *(*this + n);
sl@0:             }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator2 begin () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return m.find2 (1, index1 (), 0);
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator2 end () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return m.find2 (1, index1 (), m.size2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator2 rbegin () const {
sl@0:                 return const_reverse_iterator2 (end ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator2 rend () const {
sl@0:                 return const_reverse_iterator2 (begin ());
sl@0:             }
sl@0: #endif
sl@0: 
sl@0:             // Indices
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index1 () const {
sl@0:                 return i_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index2 () const {
sl@0:                 return j_;
sl@0:             }
sl@0: 
sl@0:             // Assignment
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator = (const const_iterator1 &it) {
sl@0:                 container_const_reference<self_type>::assign (&it ());
sl@0:                 it_ = it.it_;
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Comparison
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator == (const const_iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () == it.index2 (), bad_index ());
sl@0:                 return it_ == it.it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator < (const const_iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () == it.index2 (), bad_index ());
sl@0:                 return it_ < it.it_;
sl@0:             }
sl@0: 
sl@0:         private:
sl@0:             size_type i_;
sl@0:             size_type j_;
sl@0:             const_subiterator_type it_;
sl@0: 
sl@0:             friend class iterator1;
sl@0:         };
sl@0: #endif
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator1 begin1 () const {
sl@0:             return find1 (0, 0, 0);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator1 end1 () const {
sl@0:             return find1 (0, size1_, 0);
sl@0:         }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:         class iterator1:
sl@0:             public container_reference<vector_of_vector>,
sl@0:             public random_access_iterator_base<dense_random_access_iterator_tag,
sl@0:                                                iterator1, value_type> {
sl@0:         public:
sl@0:             typedef typename vector_of_vector::value_type value_type;
sl@0:             typedef typename vector_of_vector::difference_type difference_type;
sl@0:             typedef typename vector_of_vector::reference reference;
sl@0:             typedef typename vector_of_vector::pointer pointer;
sl@0: 
sl@0:             typedef iterator2 dual_iterator_type;
sl@0:             typedef reverse_iterator2 dual_reverse_iterator_type;
sl@0: 
sl@0:             // Construction and destruction
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 ():
sl@0:                 container_reference<self_type> (), i_ (), j_ (), it_ () {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 (self_type &m, size_type i, size_type j, const subiterator_type &it):
sl@0:                 container_reference<self_type> (m), i_ (i), j_ (j), it_ (it) {}
sl@0: 
sl@0:             // Arithmetic
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 &operator ++ () {
sl@0:                 ++ i_;
sl@0:                 self_type &m = (*this) ();
sl@0:                 if (layout_type::fast1 ())
sl@0:                     ++ it_;
sl@0:                 else
sl@0:                     it_ = m.find1 (1, i_, j_).it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 &operator -- () {
sl@0:                 -- i_;
sl@0:                 self_type &m = (*this) ();
sl@0:                 if (layout_type::fast1 ())
sl@0:                     -- it_;
sl@0:                 else
sl@0:                     it_ = m.find1 (1, i_, j_).it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 &operator += (difference_type n) {
sl@0:                 i_ += n;
sl@0:                 self_type &m = (*this) ();
sl@0:                 it_ = m.find1 (1, i_, j_).it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 &operator -= (difference_type n) {
sl@0:                 i_ -= n;
sl@0:                 self_type &m = (*this) ();
sl@0:                 it_ = m.find1 (1, i_, j_).it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             difference_type operator - (const iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () == it.index2 (), bad_index ());
sl@0:                 return index1 () - it.index1 ();
sl@0:             }
sl@0: 
sl@0:             // Dereference
sl@0:             BOOST_UBLAS_INLINE
sl@0:             reference operator * () const {
sl@0:                 BOOST_UBLAS_CHECK (index1 () < (*this) ().size1 (), bad_index ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () < (*this) ().size2 (), bad_index ());
sl@0:                 return *it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             reference operator [] (difference_type n) const {
sl@0:                 return *(*this + n);
sl@0:             }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             iterator2 begin () const {
sl@0:                 self_type &m = (*this) ();
sl@0:                 return m.find2 (1, index1 (), 0);
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             iterator2 end () const {
sl@0:                 self_type &m = (*this) ();
sl@0:                 return m.find2 (1, index1 (), m.size2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             reverse_iterator2 rbegin () const {
sl@0:                 return reverse_iterator2 (end ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             reverse_iterator2 rend () const {
sl@0:                 return reverse_iterator2 (begin ());
sl@0:             }
sl@0: #endif
sl@0: 
sl@0:             // Indices
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index1 () const {
sl@0:                 return i_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index2 () const {
sl@0:                 return j_;
sl@0:             }
sl@0: 
sl@0:             // Assignment
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 &operator = (const iterator1 &it) {
sl@0:                 container_reference<self_type>::assign (&it ());
sl@0:                 it_ = it.it_;
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Comparison
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator == (const iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () == it.index2 (), bad_index ());
sl@0:                 return it_ == it.it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator < (const iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () == it.index2 (), bad_index ());
sl@0:                 return it_ < it.it_;
sl@0:             }
sl@0: 
sl@0:         private:
sl@0:             size_type i_;
sl@0:             size_type j_;
sl@0:             subiterator_type it_;
sl@0: 
sl@0:             friend class const_iterator1;
sl@0:         };
sl@0: #endif
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         iterator1 begin1 () {
sl@0:             return find1 (0, 0, 0);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         iterator1 end1 () {
sl@0:             return find1 (0, size1_, 0);
sl@0:         }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:         class const_iterator2:
sl@0:             public container_const_reference<vector_of_vector>,
sl@0:             public random_access_iterator_base<dense_random_access_iterator_tag,
sl@0:                                                const_iterator2, value_type> {
sl@0:         public:
sl@0:             typedef typename vector_of_vector::value_type value_type;
sl@0:             typedef typename vector_of_vector::difference_type difference_type;
sl@0:             typedef typename vector_of_vector::const_reference reference;
sl@0:             typedef const typename vector_of_vector::pointer pointer;
sl@0: 
sl@0:             typedef const_iterator1 dual_iterator_type;
sl@0:             typedef const_reverse_iterator1 dual_reverse_iterator_type;
sl@0: 
sl@0:             // Construction and destruction
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 ():
sl@0:                 container_const_reference<self_type> (), i_ (), j_ (), it_ () {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 (const self_type &m, size_type i, size_type j, const const_subiterator_type &it):
sl@0:                 container_const_reference<self_type> (m), i_ (i), j_ (j), it_ (it) {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 (const iterator2 &it):
sl@0:                 container_const_reference<self_type> (it ()), i_ (it.i_), j_ (it.j_), it_ (it.it_) {}
sl@0: 
sl@0:             // Arithmetic
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator ++ () {
sl@0:                 ++ j_;
sl@0:                 const self_type &m = (*this) ();
sl@0:                 if (layout_type::fast2 ())
sl@0:                     ++ it_;
sl@0:                 else
sl@0:                     it_ = m.find2 (1, i_, j_).it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator -- () {
sl@0:                 -- j_;
sl@0:                 const self_type &m = (*this) ();
sl@0:                 if (layout_type::fast2 ())
sl@0:                     -- it_;
sl@0:                 else
sl@0:                     it_ = m.find2 (1, i_, j_).it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator += (difference_type n) {
sl@0:                 j_ += n;
sl@0:                 const self_type &m = (*this) ();
sl@0:                 it_ = m.find2 (1, i_, j_).it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator -= (difference_type n) {
sl@0:                 j_ -= n;
sl@0:                 const self_type &m = (*this) ();
sl@0:                 it_ = m.find2 (1, i_, j_).it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             difference_type operator - (const const_iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 BOOST_UBLAS_CHECK (index1 () == it.index1 (), bad_index ());
sl@0:                 return index2 () - it.index2 ();
sl@0:             }
sl@0: 
sl@0:             // Dereference
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator * () const {
sl@0:                 BOOST_UBLAS_CHECK (index1 () < (*this) ().size1 (), bad_index ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () < (*this) ().size2 (), bad_index ());
sl@0:                 return *it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator [] (difference_type n) const {
sl@0:                 return *(*this + n);
sl@0:             }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator1 begin () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return m.find1 (1, 0, index2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator1 end () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return m.find1 (1, m.size1 (), index2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator1 rbegin () const {
sl@0:                 return const_reverse_iterator1 (end ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator1 rend () const {
sl@0:                 return const_reverse_iterator1 (begin ());
sl@0:             }
sl@0: #endif
sl@0: 
sl@0:             // Indices
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index1 () const {
sl@0:                 return i_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index2 () const {
sl@0:                 return j_;
sl@0:             }
sl@0: 
sl@0:             // Assignment
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator = (const const_iterator2 &it) {
sl@0:                 container_const_reference<self_type>::assign (&it ());
sl@0:                 it_ = it.it_;
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Comparison
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator == (const const_iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 BOOST_UBLAS_CHECK (index1 () == it.index1 (), bad_index ());
sl@0:                 return it_ == it.it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator < (const const_iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 BOOST_UBLAS_CHECK (index1 () == it.index1 (), bad_index ());
sl@0:                 return it_ < it.it_;
sl@0:             }
sl@0: 
sl@0:         private:
sl@0:             size_type i_;
sl@0:             size_type j_;
sl@0:             const_subiterator_type it_;
sl@0: 
sl@0:             friend class iterator2;
sl@0:         };
sl@0: #endif
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator2 begin2 () const {
sl@0:             return find2 (0, 0, 0);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator2 end2 () const {
sl@0:             return find2 (0, 0, size2_);
sl@0:         }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:         class iterator2:
sl@0:             public container_reference<vector_of_vector>,
sl@0:             public random_access_iterator_base<dense_random_access_iterator_tag,
sl@0:                                                iterator2, value_type> {
sl@0:         public:
sl@0:             typedef typename vector_of_vector::value_type value_type;
sl@0:             typedef typename vector_of_vector::difference_type difference_type;
sl@0:             typedef typename vector_of_vector::reference reference;
sl@0:             typedef typename vector_of_vector::pointer pointer;
sl@0: 
sl@0:             typedef iterator1 dual_iterator_type;
sl@0:             typedef reverse_iterator1 dual_reverse_iterator_type;
sl@0: 
sl@0:             // Construction and destruction
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 ():
sl@0:                 container_reference<self_type> (), i_ (), j_ (), it_ () {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 (self_type &m, size_type i, size_type j, const subiterator_type &it):
sl@0:                 container_reference<self_type> (m), i_ (i), j_ (j), it_ (it) {}
sl@0: 
sl@0:             // Arithmetic
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 &operator ++ () {
sl@0:                 ++ j_;
sl@0:                 self_type &m = (*this) ();
sl@0:                 if (layout_type::fast2 ())
sl@0:                     ++ it_;
sl@0:                 else
sl@0:                     it_ = m.find2 (1, i_, j_).it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 &operator -- () {
sl@0:                 -- j_;
sl@0:                 self_type &m = (*this) ();
sl@0:                 if (layout_type::fast2 ())
sl@0:                     -- it_;
sl@0:                 else
sl@0:                     it_ = m.find2 (1, i_, j_).it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 &operator += (difference_type n) {
sl@0:                 j_ += n;
sl@0:                 self_type &m = (*this) ();
sl@0:                 it_ = m.find2 (1, i_, j_).it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 &operator -= (difference_type n) {
sl@0:                 j_ -= n;
sl@0:                 self_type &m = (*this) ();
sl@0:                 it_ = m.find2 (1, i_, j_).it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             difference_type operator - (const iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 BOOST_UBLAS_CHECK (index1 () == it.index1 (), bad_index ());
sl@0:                 return index2 () - it.index2 ();
sl@0:             }
sl@0: 
sl@0:             // Dereference
sl@0:             BOOST_UBLAS_INLINE
sl@0:             reference operator * () const {
sl@0:                 BOOST_UBLAS_CHECK (index1 () < (*this) ().size1 (), bad_index ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () < (*this) ().size2 (), bad_index ());
sl@0:                 return *it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             reference operator [] (difference_type n) const {
sl@0:                 return *(*this + n);
sl@0:             }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             iterator1 begin () const {
sl@0:                 self_type &m = (*this) ();
sl@0:                 return m.find1 (1, 0, index2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             iterator1 end () const {
sl@0:                 self_type &m = (*this) ();
sl@0:                 return m.find1 (1, m.size1 (), index2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             reverse_iterator1 rbegin () const {
sl@0:                 return reverse_iterator1 (end ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             reverse_iterator1 rend () const {
sl@0:                 return reverse_iterator1 (begin ());
sl@0:             }
sl@0: #endif
sl@0: 
sl@0:             // Indices
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index1 () const {
sl@0:                 return i_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index2 () const {
sl@0:                 return j_;
sl@0:             }
sl@0: 
sl@0:             // Assignment
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 &operator = (const iterator2 &it) {
sl@0:                 container_reference<self_type>::assign (&it ());
sl@0:                 it_ = it.it_;
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Comparison
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator == (const iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 BOOST_UBLAS_CHECK (index1 () == it.index1 (), bad_index ());
sl@0:                 return it_ == it.it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator < (const iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 BOOST_UBLAS_CHECK (index1 () == it.index1 (), bad_index ());
sl@0:                 return it_ < it.it_;
sl@0:             }
sl@0: 
sl@0:         private:
sl@0:             size_type i_;
sl@0:             size_type j_;
sl@0:             subiterator_type it_;
sl@0: 
sl@0:             friend class const_iterator2;
sl@0:         };
sl@0: #endif
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         iterator2 begin2 () {
sl@0:             return find2 (0, 0, 0);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         iterator2 end2 () {
sl@0:             return find2 (0, 0, size2_);
sl@0:         }
sl@0: 
sl@0:         // Reverse iterators
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator1 rbegin1 () const {
sl@0:             return const_reverse_iterator1 (end1 ());
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator1 rend1 () const {
sl@0:             return const_reverse_iterator1 (begin1 ());
sl@0:         }
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reverse_iterator1 rbegin1 () {
sl@0:             return reverse_iterator1 (end1 ());
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reverse_iterator1 rend1 () {
sl@0:             return reverse_iterator1 (begin1 ());
sl@0:         }
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator2 rbegin2 () const {
sl@0:             return const_reverse_iterator2 (end2 ());
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator2 rend2 () const {
sl@0:             return const_reverse_iterator2 (begin2 ());
sl@0:         }
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reverse_iterator2 rbegin2 () {
sl@0:             return reverse_iterator2 (end2 ());
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reverse_iterator2 rend2 () {
sl@0:             return reverse_iterator2 (begin2 ());
sl@0:         }
sl@0: 
sl@0:     private:
sl@0:         size_type size1_;
sl@0:         size_type size2_;
sl@0:         array_type data_;
sl@0:     };
sl@0: 
sl@0: 
sl@0:     // Zero matrix class
sl@0:     template<class T>
sl@0:     class zero_matrix:
sl@0:         public matrix_container<zero_matrix<T> > {
sl@0: 
sl@0:         typedef const T *const_pointer;
sl@0:         typedef zero_matrix<T> self_type;
sl@0:     public:
sl@0: #ifdef BOOST_UBLAS_ENABLE_PROXY_SHORTCUTS
sl@0:         using matrix_container<self_type>::operator ();
sl@0: #endif
sl@0:         typedef std::size_t size_type;
sl@0:         typedef std::ptrdiff_t difference_type;
sl@0:         typedef T value_type;
sl@0:         typedef const T &const_reference;
sl@0:         typedef T &reference;
sl@0:         typedef const matrix_reference<const self_type> const_closure_type;
sl@0:         typedef matrix_reference<self_type> closure_type;
sl@0:         typedef sparse_tag storage_category;
sl@0:         typedef unknown_orientation_tag orientation_category;
sl@0: 
sl@0:         // Construction and destruction
sl@0:         BOOST_UBLAS_INLINE
sl@0:         zero_matrix ():
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (0), size2_ (0) {}
sl@0:         BOOST_UBLAS_INLINE
sl@0:         zero_matrix (size_type size):
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (size), size2_ (size) {}
sl@0:         BOOST_UBLAS_INLINE
sl@0:         zero_matrix (size_type size1, size_type size2):
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (size1), size2_ (size2) {}
sl@0:         BOOST_UBLAS_INLINE
sl@0:         zero_matrix (const zero_matrix &m):
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (m.size1_), size2_ (m.size2_) {}
sl@0: 
sl@0:         // Accessors
sl@0:         BOOST_UBLAS_INLINE
sl@0:         size_type size1 () const {
sl@0:             return size1_;
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         size_type size2 () const {
sl@0:             return size2_;
sl@0:         }
sl@0: 
sl@0:         // Resizing
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void resize (size_type size, bool preserve = true) {
sl@0:             size1_ = size;
sl@0:             size2_ = size;
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void resize (size_type size1, size_type size2, bool /*preserve*/ = true) {
sl@0:             size1_ = size1;
sl@0:             size2_ = size2;
sl@0:         }
sl@0: 
sl@0:         // Element access
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reference operator () (size_type /* i */, size_type /* j */) const {
sl@0:             return zero_;
sl@0:         }
sl@0: 
sl@0:         // Assignment
sl@0:         BOOST_UBLAS_INLINE
sl@0:         zero_matrix &operator = (const zero_matrix &m) {
sl@0:             size1_ = m.size1_;
sl@0:             size2_ = m.size2_;
sl@0:             return *this;
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         zero_matrix &assign_temporary (zero_matrix &m) {
sl@0:             swap (m);
sl@0:             return *this;
sl@0:         }
sl@0: 
sl@0:         // Swapping
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void swap (zero_matrix &m) {
sl@0:             if (this != &m) {
sl@0:                 std::swap (size1_, m.size1_);
sl@0:                 std::swap (size2_, m.size2_);
sl@0:             }
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         friend void swap (zero_matrix &m1, zero_matrix &m2) {
sl@0:             m1.swap (m2);
sl@0:         }
sl@0: 
sl@0:         // Iterator types
sl@0:     public:
sl@0:         class const_iterator1;
sl@0:         class const_iterator2;
sl@0:         typedef reverse_iterator_base1<const_iterator1> const_reverse_iterator1;
sl@0:         typedef reverse_iterator_base2<const_iterator2> const_reverse_iterator2;
sl@0: 
sl@0:         // Element lookup
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator1 find1 (int /*rank*/, size_type /*i*/, size_type /*j*/) const {
sl@0:             return const_iterator1 (*this);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator2 find2 (int /*rank*/, size_type /*i*/, size_type /*j*/) const {
sl@0:             return const_iterator2 (*this);
sl@0:         }
sl@0: 
sl@0:         class const_iterator1:
sl@0:             public container_const_reference<zero_matrix>,
sl@0:             public bidirectional_iterator_base<sparse_bidirectional_iterator_tag,
sl@0:                                                const_iterator1, value_type> {
sl@0:         public:
sl@0:             typedef typename zero_matrix::value_type value_type;
sl@0:             typedef typename zero_matrix::difference_type difference_type;
sl@0:             typedef typename zero_matrix::const_reference reference;
sl@0:             typedef typename zero_matrix::const_pointer pointer;
sl@0: 
sl@0:             typedef const_iterator2 dual_iterator_type;
sl@0:             typedef const_reverse_iterator2 dual_reverse_iterator_type;
sl@0: 
sl@0:             // Construction and destruction
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 ():
sl@0:                 container_const_reference<self_type> () {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 (const self_type &m):
sl@0:                 container_const_reference<self_type> (m) {}
sl@0: 
sl@0:             // Arithmetic
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator ++ () {
sl@0:                 BOOST_UBLAS_CHECK_FALSE (bad_index ());
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator -- () {
sl@0:                 BOOST_UBLAS_CHECK_FALSE (bad_index ());
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Dereference
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator * () const {
sl@0:                 BOOST_UBLAS_CHECK_FALSE (bad_index ());
sl@0:                 return zero_;   // arbitary return value
sl@0:             }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator2 begin () const {
sl@0:                 return const_iterator2 ((*this) ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator2 end () const {
sl@0:                 return const_iterator2 ((*this) ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator2 rbegin () const {
sl@0:                 return const_reverse_iterator2 (end ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator2 rend () const {
sl@0:                 return const_reverse_iterator2 (begin ());
sl@0:             }
sl@0: #endif
sl@0: 
sl@0:             // Indices
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index1 () const {
sl@0:                 BOOST_UBLAS_CHECK_FALSE (bad_index ());
sl@0:                 return 0;   // arbitary return value
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index2 () const {
sl@0:                 BOOST_UBLAS_CHECK_FALSE (bad_index ());
sl@0:                 return 0;   // arbitary return value
sl@0:             }
sl@0: 
sl@0:             // Assignment
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator = (const const_iterator1 &it) {
sl@0:                 container_const_reference<self_type>::assign (&it ());
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Comparison
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator == (const const_iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return true;
sl@0:             }
sl@0:         };
sl@0: 
sl@0:         typedef const_iterator1 iterator1;
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator1 begin1 () const {
sl@0:             return const_iterator1 (*this);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator1 end1 () const {
sl@0:             return const_iterator1 (*this);
sl@0:         }
sl@0: 
sl@0:         class const_iterator2:
sl@0:             public container_const_reference<zero_matrix>,
sl@0:             public bidirectional_iterator_base<sparse_bidirectional_iterator_tag,
sl@0:                                                const_iterator2, value_type> {
sl@0:         public:
sl@0:             typedef typename zero_matrix::value_type value_type;
sl@0:             typedef typename zero_matrix::difference_type difference_type;
sl@0:             typedef typename zero_matrix::const_reference reference;
sl@0:             typedef typename zero_matrix::const_pointer pointer;
sl@0: 
sl@0:             typedef const_iterator1 dual_iterator_type;
sl@0:             typedef const_reverse_iterator1 dual_reverse_iterator_type;
sl@0: 
sl@0:             // Construction and destruction
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 ():
sl@0:                 container_const_reference<self_type> () {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 (const self_type &m):
sl@0:                 container_const_reference<self_type> (m) {}
sl@0: 
sl@0:             // Arithmetic
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator ++ () {
sl@0:                 BOOST_UBLAS_CHECK_FALSE (bad_index ());
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator -- () {
sl@0:                 BOOST_UBLAS_CHECK_FALSE (bad_index ());
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Dereference
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator * () const {
sl@0:                 BOOST_UBLAS_CHECK_FALSE (bad_index ());
sl@0:                 return zero_;   // arbitary return value
sl@0:             }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator1 begin () const {
sl@0:                 return const_iterator1 ((*this) ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator1 end () const {
sl@0:                 return const_iterator1 ((*this) ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator1 rbegin () const {
sl@0:                 return const_reverse_iterator1 (end ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator1 rend () const {
sl@0:                 return const_reverse_iterator1 (begin ());
sl@0:             }
sl@0: #endif
sl@0: 
sl@0:             // Indices
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index1 () const {
sl@0:                 BOOST_UBLAS_CHECK_FALSE (bad_index ());
sl@0:                 return 0;   // arbitary return value
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index2 () const {
sl@0:                 BOOST_UBLAS_CHECK_FALSE (bad_index ());
sl@0:                 return 0;   // arbitary return value
sl@0:             }
sl@0: 
sl@0:             // Assignment
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator = (const const_iterator2 &it) {
sl@0:                 container_const_reference<self_type>::assign (&it ());
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Comparison
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator == (const const_iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return true;
sl@0:             }
sl@0:         };
sl@0: 
sl@0:         typedef const_iterator2 iterator2;
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator2 begin2 () const {
sl@0:             return find2 (0, 0, 0);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator2 end2 () const {
sl@0:             return find2 (0, 0, size2_);
sl@0:         }
sl@0: 
sl@0:         // Reverse iterators
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator1 rbegin1 () const {
sl@0:             return const_reverse_iterator1 (end1 ());
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator1 rend1 () const {
sl@0:             return const_reverse_iterator1 (begin1 ());
sl@0:         }
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator2 rbegin2 () const {
sl@0:             return const_reverse_iterator2 (end2 ());
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator2 rend2 () const {
sl@0:             return const_reverse_iterator2 (begin2 ());
sl@0:         }
sl@0: 
sl@0:     private:
sl@0:         size_type size1_;
sl@0:         size_type size2_;
sl@0:         static const value_type zero_;
sl@0:     };
sl@0: 
sl@0:     template<class T>
sl@0:     const typename zero_matrix<T>::value_type zero_matrix<T>::zero_ (0);
sl@0: 
sl@0: 
sl@0:     // Identity matrix class
sl@0:     template<class T>
sl@0:     class identity_matrix:
sl@0:         public matrix_container<identity_matrix<T> > {
sl@0: 
sl@0:         typedef const T *const_pointer;
sl@0:         typedef identity_matrix<T> self_type;
sl@0:     public:
sl@0: #ifdef BOOST_UBLAS_ENABLE_PROXY_SHORTCUTS
sl@0:         using matrix_container<self_type>::operator ();
sl@0: #endif
sl@0:         typedef std::size_t size_type;
sl@0:         typedef std::ptrdiff_t difference_type;
sl@0:         typedef T value_type;
sl@0:         typedef const T &const_reference;
sl@0:         typedef T &reference;
sl@0:         typedef const matrix_reference<const self_type> const_closure_type;
sl@0:         typedef matrix_reference<self_type> closure_type;
sl@0:         typedef sparse_tag storage_category;
sl@0:         typedef unknown_orientation_tag orientation_category;
sl@0: 
sl@0:         // Construction and destruction
sl@0:         BOOST_UBLAS_INLINE
sl@0:         identity_matrix ():
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (0), size2_ (0), size_common_ (0) {}
sl@0:         BOOST_UBLAS_INLINE
sl@0:         identity_matrix (size_type size):
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (size), size2_ (size), size_common_ ((std::min) (size1_, size2_)) {}
sl@0:         BOOST_UBLAS_INLINE
sl@0:         identity_matrix (size_type size1, size_type size2):
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (size1), size2_ (size2), size_common_ ((std::min) (size1_, size2_)) {}
sl@0:         BOOST_UBLAS_INLINE
sl@0:         identity_matrix (const identity_matrix &m):
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (m.size1_), size2_ (m.size2_), size_common_ ((std::min) (size1_, size2_)) {}
sl@0: 
sl@0:         // Accessors
sl@0:         BOOST_UBLAS_INLINE
sl@0:         size_type size1 () const {
sl@0:             return size1_;
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         size_type size2 () const {
sl@0:             return size2_;
sl@0:         }
sl@0: 
sl@0:         // Resizing
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void resize (size_type size, bool preserve = true) {
sl@0:             size1_ = size;
sl@0:             size2_ = size;
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void resize (size_type size1, size_type size2, bool /*preserve*/ = true) {
sl@0:             size1_ = size1;
sl@0:             size2_ = size2;
sl@0:         }
sl@0: 
sl@0:         // Element access
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reference operator () (size_type i, size_type j) const {
sl@0:             if (i == j)
sl@0:                 return one_;
sl@0:             else
sl@0:                 return zero_;
sl@0:         }
sl@0: 
sl@0:         // Assignment
sl@0:         BOOST_UBLAS_INLINE
sl@0:         identity_matrix &operator = (const identity_matrix &m) {
sl@0:             size1_ = m.size1_;
sl@0:             size2_ = m.size2_;
sl@0:             return *this;
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         identity_matrix &assign_temporary (identity_matrix &m) { 
sl@0:             swap (m);
sl@0:             return *this;
sl@0:         }
sl@0: 
sl@0:         // Swapping
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void swap (identity_matrix &m) {
sl@0:             if (this != &m) {
sl@0:                 std::swap (size1_, m.size1_);
sl@0:                 std::swap (size2_, m.size2_);
sl@0:             }
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         friend void swap (identity_matrix &m1, identity_matrix &m2) {
sl@0:             m1.swap (m2);
sl@0:         }
sl@0: 
sl@0:         // Iterator types
sl@0:     private:
sl@0:         // Use an index
sl@0:         typedef size_type const_subiterator_type;
sl@0: 
sl@0:     public:
sl@0:         class const_iterator1;
sl@0:         class const_iterator2;
sl@0:         typedef reverse_iterator_base1<const_iterator1> const_reverse_iterator1;
sl@0:         typedef reverse_iterator_base2<const_iterator2> const_reverse_iterator2;
sl@0: 
sl@0:         // Element lookup
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator1 find1 (int rank, size_type i, size_type j) const {
sl@0:             if (rank == 1) {
sl@0:                 i = (std::max) (i, j);
sl@0:                 i = (std::min) (i, j + 1);
sl@0:             }
sl@0:             return const_iterator1 (*this, i);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator2 find2 (int rank, size_type i, size_type j) const {
sl@0:             if (rank == 1) {
sl@0:                 j = (std::max) (j, i);
sl@0:                 j = (std::min) (j, i + 1);
sl@0:             }
sl@0:             return const_iterator2 (*this, j);
sl@0:         }
sl@0: 
sl@0: 
sl@0:         class const_iterator1:
sl@0:             public container_const_reference<identity_matrix>,
sl@0:             public bidirectional_iterator_base<sparse_bidirectional_iterator_tag,
sl@0:                                                const_iterator1, value_type> {
sl@0:         public:
sl@0:             typedef typename identity_matrix::value_type value_type;
sl@0:             typedef typename identity_matrix::difference_type difference_type;
sl@0:             typedef typename identity_matrix::const_reference reference;
sl@0:             typedef typename identity_matrix::const_pointer pointer;
sl@0: 
sl@0:             typedef const_iterator2 dual_iterator_type;
sl@0:             typedef const_reverse_iterator2 dual_reverse_iterator_type;
sl@0: 
sl@0:             // Construction and destruction
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 ():
sl@0:                 container_const_reference<self_type> (), it_ () {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 (const self_type &m, const const_subiterator_type &it):
sl@0:                 container_const_reference<self_type> (m), it_ (it) {}
sl@0: 
sl@0:             // Arithmetic
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator ++ () {
sl@0:                 BOOST_UBLAS_CHECK (it_ < (*this) ().size1 (), bad_index ());
sl@0:                 ++it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator -- () {
sl@0:                 BOOST_UBLAS_CHECK (it_ > 0, bad_index ());
sl@0:                 --it_;
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Dereference
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator * () const {
sl@0:                 return one_;
sl@0:             }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator2 begin () const {
sl@0:                 return const_iterator2 ((*this) (), it_); 
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator2 end () const {
sl@0:                 return const_iterator2 ((*this) (), it_ + 1); 
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator2 rbegin () const {
sl@0:                 return const_reverse_iterator2 (end ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator2 rend () const {
sl@0:                 return const_reverse_iterator2 (begin ());
sl@0:             }
sl@0: #endif
sl@0: 
sl@0:             // Indices
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index1 () const {
sl@0:                 return it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index2 () const {
sl@0:                 return it_;
sl@0:             }
sl@0: 
sl@0:             // Assignment
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator = (const const_iterator1 &it) {
sl@0:                 container_const_reference<self_type>::assign (&it ());
sl@0:                 it_ = it.it_;
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Comparison
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator == (const const_iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ == it.it_;
sl@0:             }
sl@0: 
sl@0:         private:
sl@0:             const_subiterator_type it_;
sl@0:         };
sl@0: 
sl@0:         typedef const_iterator1 iterator1;
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator1 begin1 () const {
sl@0:             return const_iterator1 (*this, 0);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator1 end1 () const {
sl@0:             return const_iterator1 (*this, size_common_);
sl@0:         }
sl@0: 
sl@0:         class const_iterator2:
sl@0:             public container_const_reference<identity_matrix>,
sl@0:             public bidirectional_iterator_base<sparse_bidirectional_iterator_tag,
sl@0:                                                const_iterator2, value_type> {
sl@0:         public:
sl@0:             typedef typename identity_matrix::value_type value_type;
sl@0:             typedef typename identity_matrix::difference_type difference_type;
sl@0:             typedef typename identity_matrix::const_reference reference;
sl@0:             typedef typename identity_matrix::const_pointer pointer;
sl@0: 
sl@0:             typedef const_iterator1 dual_iterator_type;
sl@0:             typedef const_reverse_iterator1 dual_reverse_iterator_type;
sl@0: 
sl@0:             // Construction and destruction
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 ():
sl@0:                 container_const_reference<self_type> (), it_ () {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 (const self_type &m, const const_subiterator_type &it):
sl@0:                 container_const_reference<self_type> (m), it_ (it) {}
sl@0: 
sl@0:             // Arithmetic
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator ++ () {
sl@0:                 BOOST_UBLAS_CHECK (it_ < (*this) ().size_common_, bad_index ());
sl@0:                 ++it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator -- () {
sl@0:                 BOOST_UBLAS_CHECK (it_ > 0, bad_index ());
sl@0:                 --it_;
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Dereference
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator * () const {
sl@0:                 return one_;
sl@0:             }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator1 begin () const {
sl@0:                 return const_iterator1 ((*this) (), it_); 
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator1 end () const {
sl@0:                 return const_iterator1 ((*this) (), it_ + 1); 
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator1 rbegin () const {
sl@0:                 return const_reverse_iterator1 (end ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator1 rend () const {
sl@0:                 return const_reverse_iterator1 (begin ());
sl@0:             }
sl@0: #endif
sl@0: 
sl@0:             // Indices
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index1 () const {
sl@0:                 return it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index2 () const {
sl@0:                 return it_;
sl@0:             }
sl@0: 
sl@0:             // Assignment
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator = (const const_iterator2 &it) {
sl@0:                 container_const_reference<self_type>::assign (&it ());
sl@0:                 it_ = it.it_;
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Comparison
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator == (const const_iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ == it.it_;
sl@0:             }
sl@0: 
sl@0:         private:
sl@0:             const_subiterator_type it_;
sl@0:         };
sl@0: 
sl@0:         typedef const_iterator2 iterator2;
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator2 begin2 () const {
sl@0:             return const_iterator2 (*this, 0);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator2 end2 () const {
sl@0:             return const_iterator2 (*this, size_common_);
sl@0:         }
sl@0: 
sl@0:         // Reverse iterators
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator1 rbegin1 () const {
sl@0:             return const_reverse_iterator1 (end1 ());
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator1 rend1 () const {
sl@0:             return const_reverse_iterator1 (begin1 ());
sl@0:         }
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator2 rbegin2 () const {
sl@0:             return const_reverse_iterator2 (end2 ());
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator2 rend2 () const {
sl@0:             return const_reverse_iterator2 (begin2 ());
sl@0:         }
sl@0: 
sl@0:     private:
sl@0:         size_type size1_;
sl@0:         size_type size2_;
sl@0:         size_type size_common_;
sl@0:         static const value_type zero_;
sl@0:         static const value_type one_;
sl@0:     };
sl@0: 
sl@0:     template<class T>
sl@0:     const typename identity_matrix<T>::value_type identity_matrix<T>::zero_ (0);
sl@0:     template<class T>
sl@0:     const typename identity_matrix<T>::value_type identity_matrix<T>::one_ (1);
sl@0: 
sl@0: 
sl@0:     // Scalar matrix class
sl@0:     template<class T>
sl@0:     class scalar_matrix:
sl@0:         public matrix_container<scalar_matrix<T> > {
sl@0: 
sl@0:         typedef const T *const_pointer;
sl@0:         typedef scalar_matrix<T> self_type;
sl@0:     public:
sl@0: #ifdef BOOST_UBLAS_ENABLE_PROXY_SHORTCUTS
sl@0:         using matrix_container<self_type>::operator ();
sl@0: #endif
sl@0:         typedef std::size_t size_type;
sl@0:         typedef std::ptrdiff_t difference_type;
sl@0:         typedef T value_type;
sl@0:         typedef const T &const_reference;
sl@0:         typedef T &reference;
sl@0:         typedef const matrix_reference<const self_type> const_closure_type;
sl@0:         typedef dense_tag storage_category;
sl@0:         typedef unknown_orientation_tag orientation_category;
sl@0: 
sl@0:         // Construction and destruction
sl@0:         BOOST_UBLAS_INLINE
sl@0:         scalar_matrix ():
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (0), size2_ (0), value_ () {}
sl@0:         BOOST_UBLAS_INLINE
sl@0:         scalar_matrix (size_type size1, size_type size2, const value_type &value = value_type(1)):
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (size1), size2_ (size2), value_ (value) {}
sl@0:         BOOST_UBLAS_INLINE
sl@0:         scalar_matrix (const scalar_matrix &m):
sl@0:             matrix_container<self_type> (),
sl@0:             size1_ (m.size1_), size2_ (m.size2_), value_ (m.value_) {}
sl@0: 
sl@0:         // Accessors
sl@0:         BOOST_UBLAS_INLINE
sl@0:         size_type size1 () const {
sl@0:             return size1_;
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         size_type size2 () const {
sl@0:             return size2_;
sl@0:         }
sl@0: 
sl@0:         // Resizing
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void resize (size_type size1, size_type size2, bool /*preserve*/ = true) {
sl@0:             size1_ = size1;
sl@0:             size2_ = size2;
sl@0:         }
sl@0: 
sl@0:         // Element access
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reference operator () (size_type /*i*/, size_type /*j*/) const {
sl@0:             return value_; 
sl@0:         }
sl@0: 
sl@0:         // Assignment
sl@0:         BOOST_UBLAS_INLINE
sl@0:         scalar_matrix &operator = (const scalar_matrix &m) {
sl@0:             size1_ = m.size1_;
sl@0:             size2_ = m.size2_;
sl@0:             value_ = m.value_;
sl@0:             return *this;
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         scalar_matrix &assign_temporary (scalar_matrix &m) { 
sl@0:             swap (m);
sl@0:             return *this;
sl@0:         }
sl@0: 
sl@0:         // Swapping
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void swap (scalar_matrix &m) {
sl@0:             if (this != &m) {
sl@0:                 std::swap (size1_, m.size1_);
sl@0:                 std::swap (size2_, m.size2_);
sl@0:                 std::swap (value_, m.value_);
sl@0:             }
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         friend void swap (scalar_matrix &m1, scalar_matrix &m2) {
sl@0:             m1.swap (m2);
sl@0:         }
sl@0: 
sl@0:         // Iterator types
sl@0:     private:
sl@0:         // Use an index
sl@0:         typedef size_type const_subiterator_type;
sl@0: 
sl@0:     public:
sl@0: #ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:         typedef indexed_const_iterator1<self_type, dense_random_access_iterator_tag> iterator1;
sl@0:         typedef indexed_const_iterator2<self_type, dense_random_access_iterator_tag> iterator2;
sl@0:         typedef indexed_const_iterator1<self_type, dense_random_access_iterator_tag> const_iterator1;
sl@0:         typedef indexed_const_iterator2<self_type, dense_random_access_iterator_tag> const_iterator2;
sl@0: #else
sl@0:         class const_iterator1;
sl@0:         class const_iterator2;
sl@0: #endif
sl@0:         typedef reverse_iterator_base1<const_iterator1> const_reverse_iterator1;
sl@0:         typedef reverse_iterator_base2<const_iterator2> const_reverse_iterator2;
sl@0: 
sl@0:         // Element lookup
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator1 find1 (int /*rank*/, size_type i, size_type j) const {
sl@0:             return const_iterator1 (*this, i, j);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator2 find2 (int /*rank*/, size_type i, size_type j) const {
sl@0:             return const_iterator2 (*this, i, j);
sl@0:         }   
sl@0: 
sl@0: 
sl@0: #ifndef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:         class const_iterator1:
sl@0:             public container_const_reference<scalar_matrix>,
sl@0:             public random_access_iterator_base<dense_random_access_iterator_tag,
sl@0:                                                const_iterator1, value_type> {
sl@0:         public:
sl@0:             typedef typename scalar_matrix::value_type value_type;
sl@0:             typedef typename scalar_matrix::difference_type difference_type;
sl@0:             typedef typename scalar_matrix::const_reference reference;
sl@0:             typedef typename scalar_matrix::const_pointer pointer;
sl@0: 
sl@0:             typedef const_iterator2 dual_iterator_type;
sl@0:             typedef const_reverse_iterator2 dual_reverse_iterator_type;
sl@0: 
sl@0:             // Construction and destruction
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 ():
sl@0:                 container_const_reference<scalar_matrix> (), it1_ (), it2_ () {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 (const scalar_matrix &m, const const_subiterator_type &it1, const const_subiterator_type &it2):
sl@0:                 container_const_reference<scalar_matrix> (m), it1_ (it1), it2_ (it2) {}
sl@0: 
sl@0:             // Arithmetic
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator ++ () {
sl@0:                 ++ it1_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator -- () {
sl@0:                 -- it1_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator += (difference_type n) {
sl@0:                 it1_ += n;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator -= (difference_type n) {
sl@0:                 it1_ -= n;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             difference_type operator - (const const_iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 BOOST_UBLAS_CHECK (it2_ == it.it2_, external_logic ());
sl@0:                 return it1_ - it.it1_;
sl@0:             }
sl@0: 
sl@0:             // Dereference
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator * () const {
sl@0:                 BOOST_UBLAS_CHECK (index1 () < (*this) ().size1 (), bad_index ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () < (*this) ().size2 (), bad_index ());
sl@0:                 return (*this) () (index1 (), index2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator [] (difference_type n) const {
sl@0:                 return *(*this + n);
sl@0:             }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator2 begin () const {
sl@0:                 const scalar_matrix &m = (*this) ();
sl@0:                 return m.find2 (1, index1 (), 0);
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator2 end () const {
sl@0:                 const scalar_matrix &m = (*this) ();
sl@0:                 return m.find2 (1, index1 (), m.size2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator2 rbegin () const {
sl@0:                 return const_reverse_iterator2 (end ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator2 rend () const {
sl@0:                 return const_reverse_iterator2 (begin ());
sl@0:             }
sl@0: #endif
sl@0: 
sl@0:             // Indices
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index1 () const {
sl@0:                 return it1_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index2 () const {
sl@0:                 return it2_;
sl@0:             }
sl@0: 
sl@0:             // Assignment
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator = (const const_iterator1 &it) {
sl@0:                 container_const_reference<scalar_matrix>::assign (&it ());
sl@0:                 it1_ = it.it1_;
sl@0:                 it2_ = it.it2_;
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Comparison
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator == (const const_iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 BOOST_UBLAS_CHECK (it2_ == it.it2_, external_logic ());
sl@0:                 return it1_ == it.it1_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator < (const const_iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 BOOST_UBLAS_CHECK (it2_ == it.it2_, external_logic ());
sl@0:                 return it1_ < it.it1_;
sl@0:             }
sl@0: 
sl@0:         private:
sl@0:             const_subiterator_type it1_;
sl@0:             const_subiterator_type it2_;
sl@0:         };
sl@0: 
sl@0:         typedef const_iterator1 iterator1;
sl@0: #endif
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator1 begin1 () const {
sl@0:             return find1 (0, 0, 0);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator1 end1 () const {
sl@0:             return find1 (0, size1_, 0);
sl@0:         }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:         class const_iterator2:
sl@0:             public container_const_reference<scalar_matrix>,
sl@0:             public random_access_iterator_base<dense_random_access_iterator_tag,
sl@0:                                                const_iterator2, value_type> {
sl@0:         public:
sl@0:             typedef typename scalar_matrix::value_type value_type;
sl@0:             typedef typename scalar_matrix::difference_type difference_type;
sl@0:             typedef typename scalar_matrix::const_reference reference;
sl@0:             typedef typename scalar_matrix::const_pointer pointer;
sl@0: 
sl@0:             typedef const_iterator1 dual_iterator_type;
sl@0:             typedef const_reverse_iterator1 dual_reverse_iterator_type;
sl@0: 
sl@0:             // Construction and destruction
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 ():
sl@0:                 container_const_reference<scalar_matrix> (), it1_ (), it2_ () {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 (const scalar_matrix &m, const const_subiterator_type &it1, const const_subiterator_type &it2):
sl@0:                 container_const_reference<scalar_matrix> (m), it1_ (it1), it2_ (it2) {}
sl@0: 
sl@0:             // Arithmetic
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator ++ () {
sl@0:                 ++ it2_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator -- () {
sl@0:                 -- it2_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator += (difference_type n) {
sl@0:                 it2_ += n;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator -= (difference_type n) {
sl@0:                 it2_ -= n;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             difference_type operator - (const const_iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 BOOST_UBLAS_CHECK (it1_ == it.it1_, external_logic ());
sl@0:                 return it2_ - it.it2_;
sl@0:             }
sl@0: 
sl@0:             // Dereference
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator * () const {
sl@0:                 BOOST_UBLAS_CHECK (index1 () < (*this) ().size1 (), bad_index ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () < (*this) ().size2 (), bad_index ());
sl@0:                 return (*this) () (index1 (), index2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator [] (difference_type n) const {
sl@0:                 return *(*this + n);
sl@0:             }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator1 begin () const {
sl@0:                 const scalar_matrix &m = (*this) ();
sl@0:                 return m.find1 (1, 0, index2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator1 end () const {
sl@0:                 const scalar_matrix &m = (*this) ();
sl@0:                 return m.find1 (1, m.size1 (), index2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator1 rbegin () const {
sl@0:                 return const_reverse_iterator1 (end ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator1 rend () const {
sl@0:                 return const_reverse_iterator1 (begin ());
sl@0:             }
sl@0: #endif
sl@0: 
sl@0:             // Indices
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index1 () const {
sl@0:                 return it1_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index2 () const {
sl@0:                 return it2_;
sl@0:             }
sl@0: 
sl@0:             // Assignment
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator = (const const_iterator2 &it) {
sl@0:                 container_const_reference<scalar_matrix>::assign (&it ());
sl@0:                 it1_ = it.it1_;
sl@0:                 it2_ = it.it2_;
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Comparison
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator == (const const_iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 BOOST_UBLAS_CHECK (it1_ == it.it1_, external_logic ());
sl@0:                 return it2_ == it.it2_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator < (const const_iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 BOOST_UBLAS_CHECK (it1_ == it.it1_, external_logic ());
sl@0:                 return it2_ < it.it2_;
sl@0:             }
sl@0: 
sl@0:         private:
sl@0:             const_subiterator_type it1_;
sl@0:             const_subiterator_type it2_;
sl@0:         };
sl@0: 
sl@0:         typedef const_iterator2 iterator2;
sl@0: #endif
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator2 begin2 () const {
sl@0:             return find2 (0, 0, 0);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator2 end2 () const {
sl@0:             return find2 (0, 0, size2_);
sl@0:         }
sl@0: 
sl@0:         // Reverse iterators
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator1 rbegin1 () const {
sl@0:             return const_reverse_iterator1 (end1 ());
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator1 rend1 () const {
sl@0:             return const_reverse_iterator1 (begin1 ());
sl@0:         }
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator2 rbegin2 () const {
sl@0:             return const_reverse_iterator2 (end2 ());
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator2 rend2 () const {
sl@0:             return const_reverse_iterator2 (begin2 ());
sl@0:         }
sl@0: 
sl@0:     private:
sl@0:         size_type size1_;
sl@0:         size_type size2_;
sl@0:         value_type value_;
sl@0:     };
sl@0: 
sl@0: 
sl@0:     // Array based matrix class
sl@0:     template<class T, std::size_t N, std::size_t M>
sl@0:     class c_matrix:
sl@0:         public matrix_container<c_matrix<T, N, M> > {
sl@0: 
sl@0:         typedef c_matrix<T, N, M> self_type;
sl@0:     public:
sl@0: #ifdef BOOST_UBLAS_ENABLE_PROXY_SHORTCUTS
sl@0:         using matrix_container<self_type>::operator ();
sl@0: #endif
sl@0:         typedef std::size_t size_type;
sl@0:         typedef std::ptrdiff_t difference_type;
sl@0:         typedef T value_type;
sl@0:         typedef const T &const_reference;
sl@0:         typedef T &reference;
sl@0:         typedef const T *const_pointer;
sl@0:         typedef T *pointer;
sl@0:         typedef const matrix_reference<const self_type> const_closure_type;
sl@0:         typedef matrix_reference<self_type> closure_type;
sl@0:         typedef c_vector<T, N * M> vector_temporary_type;     // vector able to store all elements of c_matrix
sl@0:         typedef self_type matrix_temporary_type;
sl@0:         typedef dense_tag storage_category;
sl@0:         // This could be better for performance,
sl@0:         // typedef typename unknown_orientation_tag orientation_category;
sl@0:         // but others depend on the orientation information...
sl@0:         typedef row_major_tag orientation_category;
sl@0: 
sl@0:         // Construction and destruction
sl@0:         BOOST_UBLAS_INLINE
sl@0:         c_matrix ():
sl@0:             size1_ (N), size2_ (M) /* , data_ () */ {
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         c_matrix (size_type size1, size_type size2):
sl@0:             size1_ (size1), size2_ (size2) /* , data_ () */ {
sl@0:             if (size1_ > N || size2_ > M)
sl@0:                 bad_size ().raise ();
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         c_matrix (const c_matrix &m):
sl@0:             size1_ (m.size1_), size2_ (m.size2_) /* , data_ () */ {
sl@0:             if (size1_ > N || size2_ > M)
sl@0:                 bad_size ().raise ();
sl@0:             *this = m;
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         c_matrix (const matrix_expression<AE> &ae):
sl@0:             size1_ (ae ().size1 ()), size2_ (ae ().size2 ()) /* , data_ () */ {
sl@0:             if (size1_ > N || size2_ > M)
sl@0:                 bad_size ().raise ();
sl@0:             matrix_assign<scalar_assign> (*this, ae);
sl@0:         }
sl@0: 
sl@0:         // Accessors
sl@0:         BOOST_UBLAS_INLINE
sl@0:         size_type size1 () const {
sl@0:             return size1_;
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         size_type size2 () const {
sl@0:             return size2_;
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_pointer data () const {
sl@0:             return reinterpret_cast<const_pointer> (data_);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         pointer data () {
sl@0:             return reinterpret_cast<pointer> (data_);
sl@0:         }
sl@0: 
sl@0:         // Resizing
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void resize (size_type size1, size_type size2, bool preserve = true) {
sl@0:             if (size1 > N || size2 > M)
sl@0:                 bad_size ().raise ();
sl@0:             if (preserve) {
sl@0:                 self_type temporary (size1, size2);
sl@0:                 // Common elements to preserve
sl@0:                 const size_type size1_min = (std::min) (size1, size1_);
sl@0:                 const size_type size2_min = (std::min) (size2, size2_);
sl@0:                 for (size_type i = 0; i != size1_min; ++i) {    // indexing copy over major
sl@0:                     for (size_type j = 0; j != size2_min; ++j) {
sl@0:                         temporary.data_[i][j] = data_[i][j];
sl@0:                     }
sl@0:                 }
sl@0:                 assign_temporary (temporary);
sl@0:             }
sl@0:             else {
sl@0:                 size1_ = size1;
sl@0:                 size2_ = size2;
sl@0:             }
sl@0:         }
sl@0: 
sl@0:         // Element access
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reference operator () (size_type i, size_type j) const {
sl@0:             BOOST_UBLAS_CHECK (i < size1_, bad_index ());
sl@0:             BOOST_UBLAS_CHECK (j < size2_, bad_index ());
sl@0:             return data_ [i] [j];
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reference at_element (size_type i, size_type j) {
sl@0:             BOOST_UBLAS_CHECK (i < size1_, bad_index ());
sl@0:             BOOST_UBLAS_CHECK (j < size2_, bad_index ());
sl@0:             return data_ [i] [j];
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reference operator () (size_type i, size_type j) {
sl@0:             return at_element (i, j);
sl@0:         }
sl@0: 
sl@0:         // Element assignment
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reference insert_element (size_type i, size_type j, const_reference t) {
sl@0:             return (at_element (i, j) = t);
sl@0:         }
sl@0:         
sl@0:         // Zeroing
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void clear () {
sl@0:             for (size_type i = 0; i < size1_; ++ i)
sl@0:                 std::fill (data_ [i], data_ [i] + size2_, value_type/*zero*/());
sl@0:         }
sl@0: 
sl@0:         // Assignment
sl@0:         BOOST_UBLAS_INLINE
sl@0:         c_matrix &operator = (const c_matrix &m) {
sl@0:             size1_ = m.size1_;
sl@0:             size2_ = m.size2_;
sl@0:             for (size_type i = 0; i < m.size1_; ++ i)
sl@0:                 std::copy (m.data_ [i], m.data_ [i] + m.size2_, data_ [i]);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class C>          // Container assignment without temporary
sl@0:         BOOST_UBLAS_INLINE
sl@0:         c_matrix &operator = (const matrix_container<C> &m) {
sl@0:             resize (m ().size1 (), m ().size2 (), false);
sl@0:             assign (m);
sl@0:             return *this;
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         c_matrix &assign_temporary (c_matrix &m) {
sl@0:             swap (m);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         c_matrix &operator = (const matrix_expression<AE> &ae) { 
sl@0:             self_type temporary (ae);
sl@0:             return assign_temporary (temporary);
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         c_matrix &assign (const matrix_expression<AE> &ae) { 
sl@0:             matrix_assign<scalar_assign> (*this, ae); 
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         c_matrix& operator += (const matrix_expression<AE> &ae) {
sl@0:             self_type temporary (*this + ae);
sl@0:             return assign_temporary (temporary);
sl@0:         }
sl@0:         template<class C>          // Container assignment without temporary
sl@0:         BOOST_UBLAS_INLINE
sl@0:         c_matrix &operator += (const matrix_container<C> &m) {
sl@0:             plus_assign (m);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         c_matrix &plus_assign (const matrix_expression<AE> &ae) { 
sl@0:             matrix_assign<scalar_plus_assign> (*this, ae); 
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         c_matrix& operator -= (const matrix_expression<AE> &ae) {
sl@0:             self_type temporary (*this - ae);
sl@0:             return assign_temporary (temporary);
sl@0:         }
sl@0:         template<class C>          // Container assignment without temporary
sl@0:         BOOST_UBLAS_INLINE
sl@0:         c_matrix &operator -= (const matrix_container<C> &m) {
sl@0:             minus_assign (m);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AE>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         c_matrix &minus_assign (const matrix_expression<AE> &ae) { 
sl@0:             matrix_assign<scalar_minus_assign> (*this, ae); 
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AT>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         c_matrix& operator *= (const AT &at) {
sl@0:             matrix_assign_scalar<scalar_multiplies_assign> (*this, at);
sl@0:             return *this;
sl@0:         }
sl@0:         template<class AT>
sl@0:         BOOST_UBLAS_INLINE
sl@0:         c_matrix& operator /= (const AT &at) {
sl@0:             matrix_assign_scalar<scalar_divides_assign> (*this, at);
sl@0:             return *this;
sl@0:         }
sl@0: 
sl@0:         // Swapping
sl@0:         BOOST_UBLAS_INLINE
sl@0:         void swap (c_matrix &m) {
sl@0:             if (this != &m) {
sl@0:                 BOOST_UBLAS_CHECK (size1_ == m.size1_, bad_size ());
sl@0:                 BOOST_UBLAS_CHECK (size2_ == m.size2_, bad_size ());
sl@0:                 std::swap (size1_, m.size1_);
sl@0:                 std::swap (size2_, m.size2_);
sl@0:                 for (size_type i = 0; i < size1_; ++ i)
sl@0:                     std::swap_ranges (data_ [i], data_ [i] + size2_, m.data_ [i]);
sl@0:             }
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         friend void swap (c_matrix &m1, c_matrix &m2) {
sl@0:             m1.swap (m2);
sl@0:         }
sl@0: 
sl@0:         // Iterator types
sl@0:     private:
sl@0:         // Use pointers for iterator
sl@0:         typedef const_pointer const_subiterator_type;
sl@0:         typedef pointer subiterator_type;
sl@0: 
sl@0:     public:
sl@0: #ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:         typedef indexed_iterator1<self_type, dense_random_access_iterator_tag> iterator1;
sl@0:         typedef indexed_iterator2<self_type, dense_random_access_iterator_tag> iterator2;
sl@0:         typedef indexed_const_iterator1<self_type, dense_random_access_iterator_tag> const_iterator1;
sl@0:         typedef indexed_const_iterator2<self_type, dense_random_access_iterator_tag> const_iterator2;
sl@0: #else
sl@0:         class const_iterator1;
sl@0:         class iterator1;
sl@0:         class const_iterator2;
sl@0:         class iterator2;
sl@0: #endif
sl@0:         typedef reverse_iterator_base1<const_iterator1> const_reverse_iterator1;
sl@0:         typedef reverse_iterator_base1<iterator1> reverse_iterator1;
sl@0:         typedef reverse_iterator_base2<const_iterator2> const_reverse_iterator2;
sl@0:         typedef reverse_iterator_base2<iterator2> reverse_iterator2;
sl@0: 
sl@0:         // Element lookup
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator1 find1 (int rank, size_type i, size_type j) const {
sl@0: #ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:             return const_iterator1 (*this, i, j);
sl@0: #else
sl@0:             return const_iterator1 (*this, &data_ [i] [j]);
sl@0: #endif
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         iterator1 find1 (int rank, size_type i, size_type j) {
sl@0: #ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:             return iterator1 (*this, i, j);
sl@0: #else
sl@0:             return iterator1 (*this, &data_ [i] [j]);
sl@0: #endif
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator2 find2 (int rank, size_type i, size_type j) const {
sl@0: #ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:             return const_iterator2 (*this, i, j);
sl@0: #else
sl@0:             return const_iterator2 (*this, &data_ [i] [j]);
sl@0: #endif
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         iterator2 find2 (int rank, size_type i, size_type j) {
sl@0: #ifdef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:             return iterator2 (*this, i, j);
sl@0: #else
sl@0:             return iterator2 (*this, &data_ [i] [j]);
sl@0: #endif
sl@0:         }
sl@0: 
sl@0: 
sl@0: #ifndef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:         class const_iterator1:
sl@0:             public container_const_reference<c_matrix>,
sl@0:             public random_access_iterator_base<dense_random_access_iterator_tag,
sl@0:                                                const_iterator1, value_type> {
sl@0:         public:
sl@0:             typedef typename c_matrix::difference_type difference_type;
sl@0:             typedef typename c_matrix::value_type value_type;
sl@0:             typedef typename c_matrix::const_reference reference;
sl@0:             typedef typename c_matrix::const_pointer pointer;
sl@0: 
sl@0:             typedef const_iterator2 dual_iterator_type;
sl@0:             typedef const_reverse_iterator2 dual_reverse_iterator_type;
sl@0: 
sl@0:             // Construction and destruction
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 ():
sl@0:                 container_const_reference<self_type> (), it_ () {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 (const self_type &m, const const_subiterator_type &it):
sl@0:                 container_const_reference<self_type> (m), it_ (it) {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 (const iterator1 &it):
sl@0:                 container_const_reference<self_type> (it ()), it_ (it.it_) {}
sl@0: 
sl@0:             // Arithmetic
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator ++ () {
sl@0:                 it_ += M;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator -- () {
sl@0:                 it_ -= M;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator += (difference_type n) {
sl@0:                 it_ += n * M;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator -= (difference_type n) {
sl@0:                 it_ -= n * M;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             difference_type operator - (const const_iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return (it_ - it.it_) / M;
sl@0:             }
sl@0: 
sl@0:             // Dereference
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator * () const {
sl@0:                 BOOST_UBLAS_CHECK (index1 () < (*this) ().size1 (), bad_index ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () < (*this) ().size2 (), bad_index ());
sl@0:                 return *it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator [] (difference_type n) const {
sl@0:                 return *(*this + n);
sl@0:             }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator2 begin () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return m.find2 (1, index1 (), 0);
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator2 end () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return m.find2 (1, index1 (), m.size2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator2 rbegin () const {
sl@0:                 return const_reverse_iterator2 (end ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator2 rend () const {
sl@0:                 return const_reverse_iterator2 (begin ());
sl@0:             }
sl@0: #endif
sl@0: 
sl@0:             // Indices
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index1 () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return (it_ - m.begin1 ().it_) / M;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index2 () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return (it_ - m.begin1 ().it_) % M;
sl@0:             }
sl@0: 
sl@0:             // Assignment
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator1 &operator = (const const_iterator1 &it) {
sl@0:                 container_const_reference<self_type>::assign (&it ());
sl@0:                 it_ = it.it_;
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Comparison
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator == (const const_iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ == it.it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator < (const const_iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ < it.it_;
sl@0:             }
sl@0: 
sl@0:         private:
sl@0:             const_subiterator_type it_;
sl@0: 
sl@0:             friend class iterator1;
sl@0:         };
sl@0: #endif
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator1 begin1 () const {
sl@0:             return find1 (0, 0, 0);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator1 end1 () const {
sl@0:             return find1 (0, size1_, 0);
sl@0:         }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:         class iterator1:
sl@0:             public container_reference<c_matrix>,
sl@0:             public random_access_iterator_base<dense_random_access_iterator_tag,
sl@0:                                                iterator1, value_type> {
sl@0:         public:
sl@0: 
sl@0:             typedef typename c_matrix::difference_type difference_type;
sl@0:             typedef typename c_matrix::value_type value_type;
sl@0:             typedef typename c_matrix::reference reference;
sl@0:             typedef typename c_matrix::pointer pointer;
sl@0: 
sl@0:             typedef iterator2 dual_iterator_type;
sl@0:             typedef reverse_iterator2 dual_reverse_iterator_type;
sl@0: 
sl@0:             // Construction and destruction
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 ():
sl@0:                 container_reference<self_type> (), it_ () {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 (self_type &m, const subiterator_type &it):
sl@0:                 container_reference<self_type> (m), it_ (it) {}
sl@0: 
sl@0:             // Arithmetic
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 &operator ++ () {
sl@0:                 it_ += M;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 &operator -- () {
sl@0:                 it_ -= M;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 &operator += (difference_type n) {
sl@0:                 it_ += n * M;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 &operator -= (difference_type n) {
sl@0:                 it_ -= n * M;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             difference_type operator - (const iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return (it_ - it.it_) / M;
sl@0:             }
sl@0: 
sl@0:             // Dereference
sl@0:             BOOST_UBLAS_INLINE
sl@0:             reference operator * () const {
sl@0:                 BOOST_UBLAS_CHECK (index1 () < (*this) ().size1 (), bad_index ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () < (*this) ().size2 (), bad_index ());
sl@0:                 return *it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             reference operator [] (difference_type n) const {
sl@0:                 return *(*this + n);
sl@0:             }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             iterator2 begin () const {
sl@0:                 self_type &m = (*this) ();
sl@0:                 return m.find2 (1, index1 (), 0);
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             iterator2 end () const {
sl@0:                 self_type &m = (*this) ();
sl@0:                 return m.find2 (1, index1 (), m.size2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             reverse_iterator2 rbegin () const {
sl@0:                 return reverse_iterator2 (end ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             reverse_iterator2 rend () const {
sl@0:                 return reverse_iterator2 (begin ());
sl@0:             }
sl@0: #endif
sl@0: 
sl@0:             // Indices
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index1 () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return (it_ - m.begin1 ().it_) / M;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index2 () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return (it_ - m.begin1 ().it_) % M;
sl@0:             }
sl@0: 
sl@0:             // Assignment
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator1 &operator = (const iterator1 &it) {
sl@0:                 container_reference<self_type>::assign (&it ());
sl@0:                 it_ = it.it_;
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Comparison
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator == (const iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ == it.it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator < (const iterator1 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ < it.it_;
sl@0:             }
sl@0: 
sl@0:         private:
sl@0:             subiterator_type it_;
sl@0: 
sl@0:             friend class const_iterator1;
sl@0:         };
sl@0: #endif
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         iterator1 begin1 () {
sl@0:             return find1 (0, 0, 0);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         iterator1 end1 () {
sl@0:             return find1 (0, size1_, 0);
sl@0:         }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:         class const_iterator2:
sl@0:             public container_const_reference<c_matrix>,
sl@0:             public random_access_iterator_base<dense_random_access_iterator_tag,
sl@0:                                                const_iterator2, value_type> {
sl@0:         public:
sl@0:             typedef typename c_matrix::difference_type difference_type;
sl@0:             typedef typename c_matrix::value_type value_type;
sl@0:             typedef typename c_matrix::const_reference reference;
sl@0:             typedef typename c_matrix::const_reference pointer;
sl@0: 
sl@0:             typedef const_iterator1 dual_iterator_type;
sl@0:             typedef const_reverse_iterator1 dual_reverse_iterator_type;
sl@0: 
sl@0:             // Construction and destruction
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 ():
sl@0:                 container_const_reference<self_type> (), it_ () {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 (const self_type &m, const const_subiterator_type &it):
sl@0:                 container_const_reference<self_type> (m), it_ (it) {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 (const iterator2 &it):
sl@0:                 container_const_reference<self_type> (it ()), it_ (it.it_) {}
sl@0: 
sl@0:             // Arithmetic
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator ++ () {
sl@0:                 ++ it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator -- () {
sl@0:                 -- it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator += (difference_type n) {
sl@0:                 it_ += n;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator -= (difference_type n) {
sl@0:                 it_ -= n;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             difference_type operator - (const const_iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ - it.it_;
sl@0:             }
sl@0: 
sl@0:             // Dereference
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator * () const {
sl@0:                 BOOST_UBLAS_CHECK (index1 () < (*this) ().size1 (), bad_index ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () < (*this) ().size2 (), bad_index ());
sl@0:                 return *it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_reference operator [] (difference_type n) const {
sl@0:                 return *(*this + n);
sl@0:             }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator1 begin () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return m.find1 (1, 0, index2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_iterator1 end () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return m.find1 (1, m.size1 (), index2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator1 rbegin () const {
sl@0:                 return const_reverse_iterator1 (end ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             const_reverse_iterator1 rend () const {
sl@0:                 return const_reverse_iterator1 (begin ());
sl@0:             }
sl@0: #endif
sl@0: 
sl@0:             // Indices
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index1 () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return (it_ - m.begin2 ().it_) / M;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index2 () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return (it_ - m.begin2 ().it_) % M;
sl@0:             }
sl@0: 
sl@0:             // Assignment
sl@0:             BOOST_UBLAS_INLINE
sl@0:             const_iterator2 &operator = (const const_iterator2 &it) {
sl@0:                 container_const_reference<self_type>::assign (&it ());
sl@0:                 it_ = it.it_;
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Comparison
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator == (const const_iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ == it.it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator < (const const_iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ < it.it_;
sl@0:             }
sl@0: 
sl@0:         private:
sl@0:             const_subiterator_type it_;
sl@0: 
sl@0:             friend class iterator2;
sl@0:         };
sl@0: #endif
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator2 begin2 () const {
sl@0:             return find2 (0, 0, 0);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_iterator2 end2 () const {
sl@0:             return find2 (0, 0, size2_);
sl@0:         }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_USE_INDEXED_ITERATOR
sl@0:         class iterator2:
sl@0:             public container_reference<c_matrix>,
sl@0:             public random_access_iterator_base<dense_random_access_iterator_tag,
sl@0:                                                iterator2, value_type> {
sl@0:         public:
sl@0:             typedef typename c_matrix::difference_type difference_type;
sl@0:             typedef typename c_matrix::value_type value_type;
sl@0:             typedef typename c_matrix::reference reference;
sl@0:             typedef typename c_matrix::pointer pointer;
sl@0: 
sl@0:             typedef iterator1 dual_iterator_type;
sl@0:             typedef reverse_iterator1 dual_reverse_iterator_type;
sl@0: 
sl@0:             // Construction and destruction
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 ():
sl@0:                 container_reference<self_type> (), it_ () {}
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 (self_type &m, const subiterator_type &it):
sl@0:                 container_reference<self_type> (m), it_ (it) {}
sl@0: 
sl@0:             // Arithmetic
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 &operator ++ () {
sl@0:                 ++ it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 &operator -- () {
sl@0:                 -- it_;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 &operator += (difference_type n) {
sl@0:                 it_ += n;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 &operator -= (difference_type n) {
sl@0:                 it_ -= n;
sl@0:                 return *this;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             difference_type operator - (const iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ - it.it_;
sl@0:             }
sl@0: 
sl@0:             // Dereference
sl@0:             BOOST_UBLAS_INLINE
sl@0:             reference operator * () const {
sl@0:                 BOOST_UBLAS_CHECK (index1 () < (*this) ().size1 (), bad_index ());
sl@0:                 BOOST_UBLAS_CHECK (index2 () < (*this) ().size2 (), bad_index ());
sl@0:                 return *it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             reference operator [] (difference_type n) const {
sl@0:                 return *(*this + n);
sl@0:             }
sl@0: 
sl@0: #ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             iterator1 begin () const {
sl@0:                 self_type &m = (*this) ();
sl@0:                 return m.find1 (1, 0, index2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             iterator1 end () const {
sl@0:                 self_type &m = (*this) ();
sl@0:                 return m.find1 (1, m.size1 (), index2 ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             reverse_iterator1 rbegin () const {
sl@0:                 return reverse_iterator1 (end ());
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0: #ifdef BOOST_UBLAS_MSVC_NESTED_CLASS_RELATION
sl@0:             typename self_type::
sl@0: #endif
sl@0:             reverse_iterator1 rend () const {
sl@0:                 return reverse_iterator1 (begin ());
sl@0:             }
sl@0: #endif
sl@0: 
sl@0:             // Indices
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index1 () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return (it_ - m.begin2 ().it_) / M;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             size_type index2 () const {
sl@0:                 const self_type &m = (*this) ();
sl@0:                 return (it_ - m.begin2 ().it_) % M;
sl@0:             }
sl@0: 
sl@0:             // Assignment
sl@0:             BOOST_UBLAS_INLINE
sl@0:             iterator2 &operator = (const iterator2 &it) {
sl@0:                 container_reference<self_type>::assign (&it ());
sl@0:                 it_ = it.it_;
sl@0:                 return *this;
sl@0:             }
sl@0: 
sl@0:             // Comparison
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator == (const iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ == it.it_;
sl@0:             }
sl@0:             BOOST_UBLAS_INLINE
sl@0:             bool operator < (const iterator2 &it) const {
sl@0:                 BOOST_UBLAS_CHECK (&(*this) () == &it (), external_logic ());
sl@0:                 return it_ < it.it_;
sl@0:             }
sl@0: 
sl@0:         private:
sl@0:             subiterator_type it_;
sl@0: 
sl@0:             friend class const_iterator2;
sl@0:         };
sl@0: #endif
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         iterator2 begin2 () {
sl@0:             return find2 (0, 0, 0);
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         iterator2 end2 () {
sl@0:             return find2 (0, 0, size2_);
sl@0:         }
sl@0: 
sl@0:         // Reverse iterators
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator1 rbegin1 () const {
sl@0:             return const_reverse_iterator1 (end1 ());
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator1 rend1 () const {
sl@0:             return const_reverse_iterator1 (begin1 ());
sl@0:         }
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reverse_iterator1 rbegin1 () {
sl@0:             return reverse_iterator1 (end1 ());
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reverse_iterator1 rend1 () {
sl@0:             return reverse_iterator1 (begin1 ());
sl@0:         }
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator2 rbegin2 () const {
sl@0:             return const_reverse_iterator2 (end2 ());
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         const_reverse_iterator2 rend2 () const {
sl@0:             return const_reverse_iterator2 (begin2 ());
sl@0:         }
sl@0: 
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reverse_iterator2 rbegin2 () {
sl@0:             return reverse_iterator2 (end2 ());
sl@0:         }
sl@0:         BOOST_UBLAS_INLINE
sl@0:         reverse_iterator2 rend2 () {
sl@0:             return reverse_iterator2 (begin2 ());
sl@0:         }
sl@0: 
sl@0:     private:
sl@0:         size_type size1_;
sl@0:         size_type size2_;
sl@0:         value_type data_ [N] [M];
sl@0:     };
sl@0: 
sl@0: }}}
sl@0: 
sl@0: #endif