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85 lines
2.4 KiB
85 lines
2.4 KiB
/* |
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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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#pragma once |
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#include <thrust/detail/config.h> |
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#include <thrust/iterator/iterator_categories.h> |
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namespace thrust |
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{ |
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// define these types without inheritance to avoid ambiguous conversion to base classes |
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struct input_universal_iterator_tag |
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{ |
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operator input_host_iterator_tag () {return input_host_iterator_tag();} |
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operator input_device_iterator_tag () {return input_device_iterator_tag();} |
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}; |
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struct output_universal_iterator_tag |
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{ |
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operator output_host_iterator_tag () {return output_host_iterator_tag();} |
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operator output_device_iterator_tag () {return output_device_iterator_tag();} |
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}; |
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struct forward_universal_iterator_tag |
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: input_universal_iterator_tag |
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{ |
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operator forward_host_iterator_tag () {return forward_host_iterator_tag();}; |
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operator forward_device_iterator_tag () {return forward_device_iterator_tag();}; |
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}; |
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struct bidirectional_universal_iterator_tag |
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: forward_universal_iterator_tag |
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{ |
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operator bidirectional_host_iterator_tag () {return bidirectional_host_iterator_tag();}; |
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operator bidirectional_device_iterator_tag () {return bidirectional_device_iterator_tag();}; |
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}; |
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namespace detail |
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{ |
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// create this struct to control conversion precedence in random_access_universal_iterator_tag |
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template<typename T> |
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struct one_degree_of_separation |
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: T |
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{ |
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}; |
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} // end detail |
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struct random_access_universal_iterator_tag |
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{ |
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// these conversions are all P0 |
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operator random_access_host_iterator_tag () {return random_access_host_iterator_tag();}; |
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operator random_access_device_iterator_tag () {return random_access_device_iterator_tag();}; |
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// bidirectional_universal_iterator_tag is P1 |
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operator detail::one_degree_of_separation<bidirectional_universal_iterator_tag> () {return detail::one_degree_of_separation<bidirectional_universal_iterator_tag>();} |
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}; |
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} // end thrust |
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