// 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 xtrans_mat
//! @{

template <typename eT, bool do_conj>
inline xtrans_mat<eT, do_conj>::xtrans_mat(const Mat<eT>& in_X)
    : X(in_X),
      n_rows(in_X.n_cols)  // deliberately swapped
      ,
      n_cols(in_X.n_rows),
      n_elem(in_X.n_elem) {
  arma_debug_sigprint();
}

template <typename eT, bool do_conj>
inline void xtrans_mat<eT, do_conj>::extract(Mat<eT>& out) const {
  arma_debug_sigprint();

  really_do_conj ? op_htrans::apply_mat(out, X) : op_strans::apply_mat(out, X);
}

template <typename eT, bool do_conj>
inline eT xtrans_mat<eT, do_conj>::operator[](const uword ii) const {
  if (Y.n_elem > 0) {
    return Y[ii];
  } else {
    really_do_conj ? op_htrans::apply_mat(Y, X) : op_strans::apply_mat(Y, X);
    return Y[ii];
  }
}

template <typename eT, bool do_conj>
inline eT xtrans_mat<eT, do_conj>::at_alt(const uword ii) const {
  return (*this).operator[](ii);
}

template <typename eT, bool do_conj>
arma_inline eT xtrans_mat<eT, do_conj>::at(const uword in_row, const uword in_col) const {
  return really_do_conj ? eT(access::alt_conj(X.at(in_col, in_row)))
                        : eT(X.at(in_col, in_row));
  // in_row and in_col deliberately swapped above
}

//! @}
