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diff --git a/src/armadillo/include/armadillo_bits/Gen_bones.hpp b/src/armadillo/include/armadillo_bits/Gen_bones.hpp
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+++ b/src/armadillo/include/armadillo_bits/Gen_bones.hpp
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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 Gen
+//! @{
+
+
+//! support class for generator functions (zeros, ones, eye)
+template<typename T1, typename gen_type>
+class Gen
+  : public Base< typename T1::elem_type, Gen<T1, gen_type> >
+  {
+  public:
+  
+  typedef typename T1::elem_type                   elem_type;
+  typedef typename get_pod_type<elem_type>::result pod_type;
+  
+  static constexpr bool use_at    = (is_same_type<gen_type, gen_eye>::value);
+  static constexpr bool is_simple = (is_same_type<gen_type, gen_ones>::value) || (is_same_type<gen_type, gen_zeros>::value);
+  
+  static constexpr bool is_row  = T1::is_row;
+  static constexpr bool is_col  = T1::is_col;
+  static constexpr bool is_xvec = T1::is_xvec;
+  
+  arma_aligned const uword n_rows;
+  arma_aligned const uword n_cols;
+  
+  arma_inline  Gen(const uword in_n_rows, const uword in_n_cols);
+  arma_inline ~Gen();
+  
+  arma_inline elem_type operator[] (const uword ii)               const;
+  arma_inline elem_type at         (const uword r, const uword c) const;
+  arma_inline elem_type at_alt     (const uword ii)               const;
+  
+  inline void apply              (Mat<elem_type>& out) const;
+  inline void apply_inplace_plus (Mat<elem_type>& out) const;
+  inline void apply_inplace_minus(Mat<elem_type>& out) const;
+  inline void apply_inplace_schur(Mat<elem_type>& out) const;
+  inline void apply_inplace_div  (Mat<elem_type>& out) const;
+  
+  inline void apply(subview<elem_type>& out) const;
+  };
+
+
+
+//! @}