matrix_assign.hpp

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            ++ it1;
        }
    }
    // Sparse (proxy) column major case
    template<class F, class M, class T>
    // This function seems to be big. So we do not let the compiler inline it.
    // BOOST_UBLAS_INLINE
    void matrix_assign_scalar (F, M &m, const T &t, sparse_proxy_tag, column_major_tag) {
        typedef F functor_type;
        typename M::iterator2 it2 (m.begin2 ());
        typename M::iterator2 it2_end (m.end2 ());
        while (it2 != it2_end) {
#ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
            typename M::iterator1 it1 (it2.begin ());
            typename M::iterator1 it1_end (it2.end ());
#else
            typename M::iterator1 it1 (begin (it2, iterator2_tag ()));
            typename M::iterator1 it1_end (end (it2, iterator2_tag ()));
#endif
            while (it1 != it1_end)
                functor_type () (*it1, t), ++ it1;
            ++ it2;
        }
    }

    // Dispatcher
    template<class F, class M, class T>
    BOOST_UBLAS_INLINE
    void matrix_assign_scalar (F, M &m, const T &t) {
        typedef F functor_type;
        typedef typename M::storage_category storage_category;
        typedef typename M::orientation_category orientation_category;
        matrix_assign_scalar (functor_type (), m, t, storage_category (), orientation_category ());
    }

    template<class LS, class A, class RI1, class RI2>
    struct matrix_assign_traits {
        typedef LS storage_category;
    };

    template<>
    struct matrix_assign_traits<dense_tag, assign_tag, packed_random_access_iterator_tag, packed_random_access_iterator_tag> {
        typedef packed_tag storage_category;
    };
    template<>
    struct matrix_assign_traits<dense_tag, computed_assign_tag, packed_random_access_iterator_tag, packed_random_access_iterator_tag> {
        typedef packed_tag storage_category;
    };
    template<>
    struct matrix_assign_traits<dense_tag, assign_tag, sparse_bidirectional_iterator_tag, sparse_bidirectional_iterator_tag> {
        typedef sparse_tag storage_category;
    };
    template<>
    struct matrix_assign_traits<dense_tag, computed_assign_tag, sparse_bidirectional_iterator_tag, sparse_bidirectional_iterator_tag> {
        typedef sparse_proxy_tag storage_category;
    };

    template<>
    struct matrix_assign_traits<dense_proxy_tag, assign_tag, packed_random_access_iterator_tag, packed_random_access_iterator_tag> {
        typedef packed_proxy_tag storage_category;
    };
    template<>
    struct matrix_assign_traits<dense_proxy_tag, computed_assign_tag, packed_random_access_iterator_tag, packed_random_access_iterator_tag> {
        typedef packed_proxy_tag storage_category;
    };
    template<>
    struct matrix_assign_traits<dense_proxy_tag, assign_tag, sparse_bidirectional_iterator_tag, sparse_bidirectional_iterator_tag> {
        typedef sparse_proxy_tag storage_category;
    };
    template<>
    struct matrix_assign_traits<dense_proxy_tag, computed_assign_tag, sparse_bidirectional_iterator_tag, sparse_bidirectional_iterator_tag> {
        typedef sparse_proxy_tag storage_category;
    };

    template<>
    struct matrix_assign_traits<packed_tag, assign_tag, sparse_bidirectional_iterator_tag, sparse_bidirectional_iterator_tag> {
        typedef sparse_tag storage_category;
    };
    template<>
    struct matrix_assign_traits<packed_tag, computed_assign_tag, sparse_bidirectional_iterator_tag, sparse_bidirectional_iterator_tag> {
        typedef sparse_proxy_tag storage_category;
    };

    template<>
    struct matrix_assign_traits<packed_proxy_tag, assign_tag, sparse_bidirectional_iterator_tag, sparse_bidirectional_iterator_tag> {
        typedef sparse_proxy_tag storage_category;
    };
    template<>
    struct matrix_assign_traits<packed_proxy_tag, computed_assign_tag, sparse_bidirectional_iterator_tag, sparse_bidirectional_iterator_tag> {
        typedef sparse_proxy_tag storage_category;
    };

    template<>
    struct matrix_assign_traits<sparse_tag, computed_assign_tag, dense_random_access_iterator_tag, dense_random_access_iterator_tag> {
        typedef sparse_proxy_tag storage_category;
    };
    template<>
    struct matrix_assign_traits<sparse_tag, computed_assign_tag, packed_random_access_iterator_tag, packed_random_access_iterator_tag> {
        typedef sparse_proxy_tag storage_category;
    };
    template<>
    struct matrix_assign_traits<sparse_tag, computed_assign_tag, sparse_bidirectional_iterator_tag, sparse_bidirectional_iterator_tag> {
        typedef sparse_proxy_tag storage_category;
    };

    // Iterating row major case
    template<class F, class M, class E>
    // This function seems to be big. So we do not let the compiler inline it.
    // BOOST_UBLAS_INLINE
    void iterating_matrix_assign (F, M &m, const matrix_expression<E> &e, row_major_tag) {
        typedef F functor_type;
        typedef typename M::difference_type difference_type;
        difference_type size1 (BOOST_UBLAS_SAME (m.size1 (), e ().size1 ()));
        difference_type size2 (BOOST_UBLAS_SAME (m.size2 (), e ().size2 ()));
        typename M::iterator1 it1 (m.begin1 ());
        BOOST_UBLAS_CHECK (size2 == 0 || m.end1 () - it1 == size1, bad_size ());
        typename E::const_iterator1 it1e (e ().begin1 ());
        BOOST_UBLAS_CHECK (size2 == 0 || e ().end1 () - it1e == size1, bad_size ());
        while (-- size1 >= 0) {
#ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
            typename M::iterator2 it2 (it1.begin ());
            typename E::const_iterator2 it2e (it1e.begin ());
#else
            typename M::iterator2 it2 (begin (it1, iterator1_tag ()));
            typename E::const_iterator2 it2e (begin (it1e, iterator1_tag ()));
#endif
            BOOST_UBLAS_CHECK (it1.end () - it2 == size2, bad_size ());
            BOOST_UBLAS_CHECK (it1e.end () - it2e == size2, bad_size ());
            difference_type temp_size2 (size2);
#ifndef BOOST_UBLAS_USE_DUFF_DEVICE
            while (-- temp_size2 >= 0)
                functor_type () (*it2, *it2e), ++ it2, ++ it2e;
#else
            DD (temp_size2, 2, r, (functor_type () (*it2, *it2e), ++ it2, ++ it2e));
#endif
            ++ it1, ++ it1e;
        }
    }
    // Iterating column major case
    template<class F, class M, class E>
    // This function seems to be big. So we do not let the compiler inline it.
    // BOOST_UBLAS_INLINE
    void iterating_matrix_assign (F, M &m, const matrix_expression<E> &e, column_major_tag) {
        typedef F functor_type;
        typedef typename M::difference_type difference_type;
        difference_type size2 (BOOST_UBLAS_SAME (m.size2 (), e ().size2 ()));
        difference_type size1 (BOOST_UBLAS_SAME (m.size1 (), e ().size1 ()));
        typename M::iterator2 it2 (m.begin2 ());
        BOOST_UBLAS_CHECK (size1 == 0 || m.end2 () - it2 == size2, bad_size ());
        typename E::const_iterator2 it2e (e ().begin2 ());
        BOOST_UBLAS_CHECK (size1 == 0 || e ().end2 () - it2e == size2, bad_size ());
        while (-- size2 >= 0) {
#ifndef BOOST_UBLAS_NO_NESTED_CLASS_RELATION
            typename M::iterator1 it1 (it2.begin ());
            typename E::const_iterator1 it1e (it2e.begin ());
#else
            typename M::iterator1 it1 (begin (it2, iterator2_tag ()));
            typename E::const_iterator1 it1e (begin (it2e, iterator2_tag ()));
#endif
            BOOST_UBLAS_CHECK (it2.end () - it1 == size1, bad_size ());
            BOOST_UBLAS_CHECK (it2e.end () - it1e == size1, bad_size ());
            difference_type temp_size1 (size1);
#ifndef BOOST_UBLAS_USE_DUFF_DEVICE
            while (-- temp_size1 >= 0)
                functor_type () (*it1, *it1e), ++ it1, ++ it1e;
#else
            DD (temp_size1, 2, r, (functor_type () (*it1, *it1e), ++ it1, ++ it1e));
#endif
            ++ it2, ++ it2e;
        }
    }
    // Indexing row major case
    template<class F, class M, class E>
    // This function seems to be big. So we do not let the compiler inline it.
    // BOOST_UBLAS_INLINE
    void indexing_matrix_assign (F, M &m, const matrix_expression<E> &e, row_major_tag) {
        typedef F functor_type;
        typedef typename M::difference_type difference_type;
        difference_type size1 (BOOST_UBLAS_SAME (m.size1 (), e ().size1 ()));
        difference_type size2 (BOOST_UBLAS_SAME (m.size2 (), e ().size2 ()));
        for (difference_type i = 0; i < size1; ++ i) {
#ifndef BOOST_UBLAS_USE_DUFF_DEVICE
            for (difference_type j = 0; j < size2; ++ j)
                functor_type () (m (i, j), e () (i, j));
#else
            difference_type j (0);
            DD (size2, 2, r, (functor_type () (m (i, j), e () (i, j)), ++ j));
#endif
        }
    }
    // Indexing column major case
    template<class F, class M, class E>
    // This function seems to be big. So we do not let the compiler inline it.
    // BOOST_UBLAS_INLINE
    void indexing_matrix_assign (F, M &m, const matrix_expression<E> &e, column_major_tag) {
        typedef F functor_type;
        typedef typename M::difference_type difference_type;
        difference_type size2 (BOOST_UBLAS_SAME (m.size2 (), e ().size2 ()));
        difference_type size1 (BOOST_UBLAS_SAME (m.size1 (), e ().size1 ()));
        for (difference_type j = 0; j < size2; ++ j)
#ifndef BOOST_UBLAS_USE_DUFF_DEVICE
            for (difference_type i = 0; i < size1; ++ i) {
                functor_type () (m (i, j), e () (i, j));
#else
            difference_type i (0);
            DD (size1, 2, r, (functor_type () (m (i, j), e () (i, j)), ++ i));
#endif
        }
    }

    // Dense (proxy) case
    template<class F, class M, class E, class C>
    // This function seems to be big. So we do not let the compiler inline it.
    // BOOST_UBLAS_INLINE
    void matrix_assign (F, M &m, const matrix_expression<E> &e, full, dense_proxy_tag, C) {
        typedef F functor_type;
        typedef C orientation_category;
#ifdef BOOST_UBLAS_USE_INDEXING
        indexing_matrix_assign (functor_type (), m, e, orientation_category ());
#elif BOOST_UBLAS_USE_ITERATING
        iterating_matrix_assign (functor_type (), m, e, orientation_category ());
#else
        typedef typename M::difference_type difference_type;
        difference_type size1 (BOOST_UBLAS_SAME (m.size1 (), e ().size1 ()));
        difference_type size2 (BOOST_UBLAS_SAME (m.size2 (), e ().size2 ()));
        if (size1 >= BOOST_UBLAS_ITERATOR_THRESHOLD &&
            size2 >= BOOST_UBLAS_ITERATOR_THRESHOLD)
            iterating_matrix_assign (functor_type (), m, e, orientation_category ());
        else
            indexing_matrix_assign (functor_type (), m, e, orientation_category ());
#endif
    }
    // Packed (proxy) row major case
    template<class F1, class M, class E, class F2>
    // This function seems to be big. So we do not let the compiler inline it.
    // BOOST_UBLAS_INLINE
    void matrix_assign (F1, M &m, const matrix_expression<E> &e, F2, packed_proxy_tag, row_major_tag) {
        BOOST_UBLAS_CHECK (m.size1 () == e ().size1 (), bad_size ());
        BOOST_UBLAS_CHECK (m.size2 () == e ().size2 (), bad_size ());
        typedef F1 functor1_type;
        typedef F2 functor2_type;
        typedef typename M::difference_type difference_type;
        typedef typename M::value_type value_type;
#ifdef BOOST_UBLAS_TYPE_CHECK
        matrix<value_type, row_major> cm (m.size1 (), m.size2 ());
#ifndef BOOST_UBLAS_NO_ELEMENT_PROXIES
        indexing_matrix_assign (scalar_assign<typename matrix<value_type, row_major>::reference, value_type> (), cm, m, row_major_tag ());
        indexing_matrix_assign (functor1_type::template make_debug_functor<typename matrix<value_type, row_major>::reference, value_type> (), cm, e, row_major_tag ());
#else
        indexing_matrix_assign (scalar_assign<value_type, value_type> (), cm, m, row_major_tag ());
        indexing_matrix_assign (functor1_type (), cm, e, row_major_tag ());
#endif
#endif
        typename M::iterator1 it1 (m.begin1 ());
        typename M::iterator1 it1_end (m.end1 ());
        typename E::const_iterator1 it1e (e ().begin1 ());
        typename E::const_iterator1 it1e_end (e ().end1 ());
        difference_type it1_size (it1_end - it1);
        difference_type it1e_size (it1e_end - it1e);
        difference_type diff1 (0);
        if (it1_size > 0 && it1e_size > 0)
            diff1 = it1.index1 () - it1e.index1 ();
        if (diff1 != 0) {
            difference_type size1 = std::min (diff1, it1e_size);
            if (size1 > 0) {
                it1e += size1;
                it1e_size -= size1;
                diff1 -= size1;
            }
            size1 = std::min (- diff1, it1_size);
            if (size1 > 0) {
                it1_size -= size1;
                if (boost::is_same<BOOST_UBLAS_TYPENAME functor1_type::assign_category, assign_tag>::value) {