// SPDX-License-Identifier: Apache-2.0
// 
// Copyright 2008-2016 Conrad Sanderson (https://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
// https://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 op_col_as_mat
//! @{



template<typename T1>
inline
void
op_col_as_mat::apply(Mat<typename T1::elem_type>& out, const CubeToMatOp<T1, op_col_as_mat>& expr)
  {
  arma_debug_sigprint();
  
  typedef typename T1::elem_type eT;
  
  const unwrap_cube<T1> U(expr.m);
  const Cube<eT>&   A = U.M;
  
  const uword in_col = expr.aux_uword;
  
  arma_conform_check_bounds( (in_col >= A.n_cols), "Cube::col_as_mat(): index out of bounds" );
  
  const uword A_n_rows   = A.n_rows;
  const uword A_n_slices = A.n_slices;
  
  out.set_size(A_n_rows, A_n_slices);
  
  for(uword s=0; s < A_n_slices; ++s)
    {
    arrayops::copy(out.colptr(s), A.slice_colptr(s, in_col), A_n_rows);
    }
  }



//! @}
