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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.
+// ------------------------------------------------------------------------
+
+
+namespace newarp
+{
+
+
+//! Define matrix operations on existing matrix objects
+template<typename eT>
+class SparseGenRealShiftSolve
+ {
+ private:
+
+ #if defined(ARMA_USE_SUPERLU)
+ // The following objects are read-only in perform_op()
+ mutable superlu_supermatrix_wrangler l;
+ mutable superlu_supermatrix_wrangler u;
+ mutable superlu_array_wrangler<int> perm_c;
+ mutable superlu_array_wrangler<int> perm_r;
+ #endif
+
+
+ public:
+
+ bool valid = false;
+
+ const uword n_rows; // number of rows of the underlying matrix
+ const uword n_cols; // number of columns of the underlying matrix
+
+ inline SparseGenRealShiftSolve(const SpMat<eT>& mat_obj, const eT shift);
+
+ inline void perform_op(eT* x_in, eT* y_out) const;
+ };
+
+
+} // namespace newarp