// 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 span
//! @{

struct span_alt {};

template <typename junk = int>
class span_base {
 public:
  static const span_alt all;
};

template <typename junk>
const span_alt span_base<junk>::all = span_alt();

class span : public span_base<> {
 public:
  uword a;
  uword b;
  bool whole;

  inline span() : a(0), b(0), whole(true) {}

  inline span(const span_alt&) : a(0), b(0), whole(true) {}

  inline explicit span(const uword in_a) : a(in_a), b(in_a), whole(false) {}

  // the "explicit" keyword is required here to prevent automatic conversion of {a,b}
  // into an instance of span() when submatrices are specified
  inline explicit span(const uword in_a, const uword in_b)
      : a(in_a), b(in_b), whole(false) {}
};

//! @}
