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/*
* 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.
*/
#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/advance.h>
#include <thrust/system/detail/generic/advance.h>
#include <thrust/iterator/iterator_traits.h>
#include <thrust/detail/type_traits.h>
#include <thrust/detail/type_traits/has_nested_type.h>
#include <thrust/detail/type_traits/pointer_traits.h>
THRUST_NAMESPACE_BEGIN
__THRUST_DEFINE_HAS_NESTED_TYPE(has_difference_type, difference_type)
template <typename InputIterator, typename Distance>
__host__ __device__
void advance(InputIterator& i, Distance n)
{
thrust::system::detail::generic::advance(i, n);
}
template <typename InputIterator>
__host__ __device__
InputIterator next(
InputIterator i
, typename iterator_traits<InputIterator>::difference_type n = 1
)
{
thrust::system::detail::generic::advance(i, n);
return i;
}
template <typename BidirectionalIterator>
__host__ __device__
BidirectionalIterator prev(
BidirectionalIterator i
, typename iterator_traits<BidirectionalIterator>::difference_type n = 1
)
{
thrust::system::detail::generic::advance(i, -n);
return i;
}
template <typename BidirectionalIterator>
__host__ __device__
typename detail::disable_if<
has_difference_type<iterator_traits<BidirectionalIterator> >::value
, BidirectionalIterator
>::type prev(
BidirectionalIterator i
, typename detail::pointer_traits<BidirectionalIterator>::difference_type n = 1
)
{
thrust::system::detail::generic::advance(i, -n);
return i;
}
THRUST_NAMESPACE_END
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