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122 lines
2.9 KiB
122 lines
2.9 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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#pragma once
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#include <thrust/detail/config.h>
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#include <thrust/detail/type_traits/has_nested_type.h>
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#include <thrust/detail/raw_pointer_cast.h>
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#include <thrust/detail/type_traits.h>
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#include <thrust/iterator/detail/tuple_of_iterator_references.h>
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namespace thrust
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{
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namespace detail
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{
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__THRUST_DEFINE_HAS_NESTED_TYPE(is_wrapped_reference, wrapped_reference_hint)
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namespace raw_reference_detail
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{
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template<typename T, typename Enable = void>
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struct raw_reference
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: add_reference<T>
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{};
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// XXX consider making raw_reference<T&> an error
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template<typename T>
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struct raw_reference<
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T,
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typename thrust::detail::enable_if<
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is_wrapped_reference<
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typename remove_cv<T>::type
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>::value
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>::type
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>
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{
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typedef typename add_reference<
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typename pointer_element<typename T::pointer>::type
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>::type type;
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};
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} // end raw_reference_ns
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template<typename T>
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struct raw_reference :
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raw_reference_detail::raw_reference<T>
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{};
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// wrapped reference-like things which aren't strictly wrapped references
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// (e.g. tuples of wrapped references) are considered unwrappable
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template<typename T>
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struct is_unwrappable
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: is_wrapped_reference<T>
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{};
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template<typename T, typename Result = void>
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struct enable_if_unwrappable
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: enable_if<
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is_unwrappable<T>::value,
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Result
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>
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{};
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} // end detail
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template<typename T>
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inline __host__ __device__ typename detail::raw_reference<T>::type raw_reference_cast(T &ref)
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{
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return *thrust::raw_pointer_cast(&ref);
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} // end raw_reference_cast
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template<typename T>
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inline __host__ __device__ typename detail::raw_reference<const T>::type raw_reference_cast(const T &ref)
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{
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return *thrust::raw_pointer_cast(&ref);
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} // end raw_reference_cast
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template<
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typename T0, typename T1, typename T2,
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typename T3, typename T4, typename T5,
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typename T6, typename T7, typename T8,
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typename T9
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>
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inline __host__ __device__
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typename detail::enable_if_unwrappable<
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thrust::detail::tuple_of_iterator_references<T0,T1,T2,T3,T4,T5,T6,T7,T8,T9>,
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typename detail::raw_reference<
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thrust::detail::tuple_of_iterator_references<T0,T1,T2,T3,T4,T5,T6,T7,T8,T9>
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>::type
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>::type
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raw_reference_cast(detail::tuple_of_iterator_references<T0,T1,T2,T3,T4,T5,T6,T7,T8,T9> t);
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} // end thrust
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#include <thrust/detail/raw_reference_cast.inl>
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