// 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 eGlue
//! @{

template <typename T1, typename T2, typename eglue_type>
class eGlue : public Base<typename T1::elem_type, eGlue<T1, T2, eglue_type> > {
 public:
  typedef typename T1::elem_type elem_type;
  typedef typename get_pod_type<elem_type>::result pod_type;
  typedef Proxy<T1> proxy1_type;
  typedef Proxy<T2> proxy2_type;

  static constexpr bool use_at = (Proxy<T1>::use_at || Proxy<T2>::use_at);
  static constexpr bool use_mp = (Proxy<T1>::use_mp || Proxy<T2>::use_mp);
  static constexpr bool has_subview = (Proxy<T1>::has_subview || Proxy<T2>::has_subview);

  static constexpr bool is_col = (Proxy<T1>::is_col || Proxy<T2>::is_col);
  static constexpr bool is_row = (Proxy<T1>::is_row || Proxy<T2>::is_row);
  static constexpr bool is_xvec = (Proxy<T1>::is_xvec || Proxy<T2>::is_xvec);

  arma_aligned const Proxy<T1> P1;
  arma_aligned const Proxy<T2> P2;

  arma_inline ~eGlue();
  arma_inline eGlue(const T1& in_A, const T2& in_B);

  arma_inline uword get_n_rows() const;
  arma_inline uword get_n_cols() const;
  arma_inline uword get_n_elem() const;

  arma_inline elem_type operator[](const uword ii) const;
  arma_inline elem_type at(const uword row, const uword col) const;
  arma_inline elem_type at_alt(const uword ii) const;
};

//! @}
