thrust/iterator/reverse_iterator.h

File members: thrust/iterator/reverse_iterator.h

/*
 *  Copyright 2008-2013 NVIDIA Corporation
 *
 *  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.
 */

/*
 * (C) Copyright David Abrahams 2002.
 * (C) Copyright Jeremy Siek    2002.
 * (C) Copyright Thomas Witt    2002.
 *
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying NOTICE file for the complete license)
 *
 * For more information, see http://www.boost.org
 */

#pragma once

#include <thrust/detail/config.h>

#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
#  pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
#  pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
#  pragma system_header
#endif // no system header
#include <thrust/detail/type_traits.h>
#include <thrust/iterator/detail/reverse_iterator_base.h>
#include <thrust/iterator/iterator_facade.h>

THRUST_NAMESPACE_BEGIN

template <typename BidirectionalIterator>
class reverse_iterator : public detail::reverse_iterator_base<BidirectionalIterator>::type
{
private:
  using super_t = typename thrust::detail::reverse_iterator_base<BidirectionalIterator>::type;

  friend class thrust::iterator_core_access;
public:
#if defined(_CCCL_COMPILER_MSVC_2017)
  _CCCL_HOST_DEVICE reverse_iterator() {}
#else // ^^^ _CCCL_COMPILER_MSVC_2017 ^^^ / vvv !_CCCL_COMPILER_MSVC_2017 vvv
  reverse_iterator() = default;
#endif // !_CCCL_COMPILER_MSVC_2017

  _CCCL_HOST_DEVICE explicit reverse_iterator(BidirectionalIterator x)
      : super_t(x)
  {}

  template <typename OtherBidirectionalIterator,
            detail::enable_if_convertible_t<OtherBidirectionalIterator, BidirectionalIterator, int> = 0>
  _CCCL_HOST_DEVICE reverse_iterator(reverse_iterator<OtherBidirectionalIterator> const& rhs)
      : super_t(rhs.base())
  {}

private:
  _CCCL_EXEC_CHECK_DISABLE
  _CCCL_HOST_DEVICE typename super_t::reference dereference() const;

  _CCCL_HOST_DEVICE void increment();

  _CCCL_HOST_DEVICE void decrement();

  _CCCL_HOST_DEVICE void advance(typename super_t::difference_type n);

  template <typename OtherBidirectionalIterator>
  _CCCL_HOST_DEVICE typename super_t::difference_type
  distance_to(reverse_iterator<OtherBidirectionalIterator> const& y) const;
}; // end reverse_iterator

template <typename BidirectionalIterator>
_CCCL_HOST_DEVICE reverse_iterator<BidirectionalIterator> make_reverse_iterator(BidirectionalIterator x);

THRUST_NAMESPACE_END

#include <thrust/iterator/detail/reverse_iterator.inl>