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113 lines
2.7 KiB
113 lines
2.7 KiB
11 years ago
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/*
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* Copyright 2008-2012 NVIDIA Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*! \file iterator_traits.inl
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* \brief Inline file for iterator_traits.h.
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*/
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#include <thrust/iterator/iterator_categories.h>
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#include <thrust/iterator/detail/iterator_category_to_traversal.h>
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#include <thrust/detail/type_traits.h>
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namespace thrust
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{
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template<typename Iterator>
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struct iterator_value
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{
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typedef typename thrust::iterator_traits<Iterator>::value_type type;
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}; // end iterator_value
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template<typename Iterator>
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struct iterator_pointer
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{
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typedef typename thrust::iterator_traits<Iterator>::pointer type;
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}; // end iterator_pointer
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template<typename Iterator>
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struct iterator_reference
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{
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typedef typename iterator_traits<Iterator>::reference type;
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}; // end iterator_reference
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template<typename Iterator>
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struct iterator_difference
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{
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typedef typename thrust::iterator_traits<Iterator>::difference_type type;
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}; // end iterator_difference
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template<typename Iterator>
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struct iterator_system
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: detail::iterator_category_to_system<
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typename thrust::iterator_traits<Iterator>::iterator_category
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>
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{
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}; // end iterator_system
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// specialize iterator_system for void *, which has no category
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template<>
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struct iterator_system<void *>
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{
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typedef thrust::iterator_system<int*>::type type;
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}; // end iterator_system<void*>
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template<>
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struct iterator_system<const void *>
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{
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typedef thrust::iterator_system<const int*>::type type;
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}; // end iterator_system<void*>
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template <typename Iterator>
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struct iterator_traversal
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: detail::iterator_category_to_traversal<
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typename thrust::iterator_traits<Iterator>::iterator_category
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>
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{
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}; // end iterator_traversal
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namespace detail
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{
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template <typename T>
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struct is_iterator_traversal
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: thrust::detail::is_convertible<T, incrementable_traversal_tag>
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{
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}; // end is_iterator_traversal
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template<typename T>
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struct is_iterator_system
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: detail::or_<
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detail::is_convertible<T, any_system_tag>,
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detail::or_<
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detail::is_convertible<T, host_system_tag>,
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detail::is_convertible<T, device_system_tag>
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>
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>
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{
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}; // end is_iterator_system
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} // end namespace detail
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} // end namespace thrust
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