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+// SPDX-License-Identifier: Apache-2.0
+//
+// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
+// Copyright 2008-2016 National ICT Australia (NICTA)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// ------------------------------------------------------------------------
+
+
+//! \addtogroup MapMat
+//! @{
+
+
+
+// this class is for internal use only; subject to change and/or removal without notice
+template<typename eT>
+class MapMat
+ {
+ public:
+
+ typedef eT elem_type; //!< the type of elements stored in the matrix
+ typedef typename get_pod_type<eT>::result pod_type; //!< if eT is std::complex<T>, pod_type is T; otherwise pod_type is eT
+
+ static constexpr bool is_row = false;
+ static constexpr bool is_col = false;
+ static constexpr bool is_xvec = false;
+
+ const uword n_rows; //!< number of rows (read-only)
+ const uword n_cols; //!< number of columns (read-only)
+ const uword n_elem; //!< number of elements (read-only)
+
+
+ private:
+
+ typedef typename std::map<uword, eT> map_type;
+
+ arma_aligned map_type* map_ptr;
+
+
+ public:
+
+ inline ~MapMat();
+ inline MapMat();
+
+ inline explicit MapMat(const uword in_n_rows, const uword in_n_cols);
+ inline explicit MapMat(const SizeMat& s);
+
+ inline MapMat(const MapMat<eT>& x);
+ inline void operator=(const MapMat<eT>& x);
+
+ inline explicit MapMat(const SpMat<eT>& x);
+ inline void operator=(const SpMat<eT>& x);
+
+ inline MapMat(MapMat<eT>&& x);
+ inline void operator=(MapMat<eT>&& x);
+
+ inline void reset();
+ inline void set_size(const uword in_n_rows);
+ inline void set_size(const uword in_n_rows, const uword in_n_cols);
+ inline void set_size(const SizeMat& s);
+
+ inline void zeros();
+ inline void zeros(const uword in_n_rows);
+ inline void zeros(const uword in_n_rows, const uword in_n_cols);
+ inline void zeros(const SizeMat& s);
+
+ inline void eye();
+ inline void eye(const uword in_n_rows, const uword in_n_cols);
+ inline void eye(const SizeMat& s);
+
+ inline void speye();
+ inline void speye(const uword in_n_rows, const uword in_n_cols);
+ inline void speye(const SizeMat& s);
+
+ arma_warn_unused arma_inline MapMat_val<eT> operator[](const uword index);
+ arma_warn_unused inline eT operator[](const uword index) const;
+
+ arma_warn_unused arma_inline MapMat_val<eT> operator()(const uword index);
+ arma_warn_unused inline eT operator()(const uword index) const;
+
+ arma_warn_unused arma_inline MapMat_val<eT> at(const uword in_row, const uword in_col);
+ arma_warn_unused inline eT at(const uword in_row, const uword in_col) const;
+
+ arma_warn_unused arma_inline MapMat_val<eT> operator()(const uword in_row, const uword in_col);
+ arma_warn_unused inline eT operator()(const uword in_row, const uword in_col) const;
+
+ arma_warn_unused inline bool is_empty() const;
+ arma_warn_unused inline bool is_vec() const;
+ arma_warn_unused inline bool is_rowvec() const;
+ arma_warn_unused inline bool is_colvec() const;
+ arma_warn_unused inline bool is_square() const;
+
+
+ inline void sprandu(const uword in_n_rows, const uword in_n_cols, const double density);
+
+ inline void print(const std::string& extra_text) const;
+
+ inline uword get_n_nonzero() const;
+ inline void get_locval_format(umat& locs, Col<eT>& vals) const;
+
+
+ private:
+
+ inline void init_cold();
+ inline void init_warm(const uword in_n_rows, const uword in_n_cols);
+
+ arma_inline void set_val(const uword index, const eT& in_val);
+ inline void erase_val(const uword index);
+
+
+ friend class SpMat<eT>;
+ friend class MapMat_val<eT>;
+ friend class SpMat_MapMat_val<eT>;
+ friend class SpSubview_MapMat_val<eT>;
+ };
+
+
+
+template<typename eT>
+class MapMat_val
+ {
+ private:
+
+ arma_aligned MapMat<eT>& parent;
+
+ arma_aligned const uword index;
+
+ inline MapMat_val(MapMat<eT>& in_parent, const uword in_index);
+
+ friend class MapMat<eT>;
+
+
+ public:
+
+ arma_inline operator eT() const;
+
+ arma_inline typename get_pod_type<eT>::result real() const;
+ arma_inline typename get_pod_type<eT>::result imag() const;
+
+ arma_inline void operator= (const MapMat_val<eT>& x);
+ arma_inline void operator= (const eT in_val);
+ arma_inline void operator+=(const eT in_val);
+ arma_inline void operator-=(const eT in_val);
+ arma_inline void operator*=(const eT in_val);
+ arma_inline void operator/=(const eT in_val);
+
+ arma_inline void operator++();
+ arma_inline void operator++(int);
+
+ arma_inline void operator--();
+ arma_inline void operator--(int);
+ };
+
+
+
+template<typename eT>
+class SpMat_MapMat_val
+ {
+ private:
+
+ arma_aligned SpMat<eT>& s_parent;
+ arma_aligned MapMat<eT>& m_parent;
+
+ arma_aligned const uword row;
+ arma_aligned const uword col;
+
+ inline SpMat_MapMat_val(SpMat<eT>& in_s_parent, MapMat<eT>& in_m_parent, const uword in_row, const uword in_col);
+
+ friend class SpMat<eT>;
+ friend class MapMat<eT>;
+ friend class SpSubview_MapMat_val<eT>;
+
+
+ public:
+
+ inline operator eT() const;
+
+ inline typename get_pod_type<eT>::result real() const;
+ inline typename get_pod_type<eT>::result imag() const;
+
+ inline SpMat_MapMat_val<eT>& operator= (const SpMat_MapMat_val<eT>& x);
+
+ inline SpMat_MapMat_val<eT>& operator= (const eT in_val);
+ inline SpMat_MapMat_val<eT>& operator+=(const eT in_val);
+ inline SpMat_MapMat_val<eT>& operator-=(const eT in_val);
+ inline SpMat_MapMat_val<eT>& operator*=(const eT in_val);
+ inline SpMat_MapMat_val<eT>& operator/=(const eT in_val);
+
+ inline SpMat_MapMat_val<eT>& operator++();
+ arma_warn_unused inline eT operator++(int);
+
+ inline SpMat_MapMat_val<eT>& operator--();
+ arma_warn_unused inline eT operator--(int);
+
+ inline void set(const eT in_val);
+ inline void add(const eT in_val);
+ inline void sub(const eT in_val);
+ inline void mul(const eT in_val);
+ inline void div(const eT in_val);
+ };
+
+
+
+template<typename eT>
+class SpSubview_MapMat_val : public SpMat_MapMat_val<eT>
+ {
+ private:
+
+ arma_inline SpSubview_MapMat_val(SpSubview<eT>& in_sv_parent, MapMat<eT>& in_m_parent, const uword in_row, const uword in_col);
+
+ arma_aligned SpSubview<eT>& sv_parent;
+
+ friend class SpMat<eT>;
+ friend class MapMat<eT>;
+ friend class SpSubview<eT>;
+ friend class SpMat_MapMat_val<eT>;
+
+
+ public:
+
+ inline SpSubview_MapMat_val<eT>& operator= (const SpSubview_MapMat_val<eT>& x);
+
+ inline SpSubview_MapMat_val<eT>& operator= (const eT in_val);
+ inline SpSubview_MapMat_val<eT>& operator+=(const eT in_val);
+ inline SpSubview_MapMat_val<eT>& operator-=(const eT in_val);
+ inline SpSubview_MapMat_val<eT>& operator*=(const eT in_val);
+ inline SpSubview_MapMat_val<eT>& operator/=(const eT in_val);
+
+ inline SpSubview_MapMat_val<eT>& operator++();
+ arma_warn_unused inline eT operator++(int);
+
+ inline SpSubview_MapMat_val<eT>& operator--();
+ arma_warn_unused inline eT operator--(int);
+ };
+
+
+
+//! @}
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