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66 lines
1.7 KiB
66 lines
1.7 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/detail/type_traits.h> |
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#include <thrust/detail/type_traits/is_metafunction_defined.h> |
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#include <thrust/iterator/iterator_traits.h> |
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#include <thrust/iterator/detail/any_assign.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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template<typename T> |
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struct is_void_like |
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: thrust::detail::or_< |
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thrust::detail::is_void<T>, |
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thrust::detail::is_same<T,thrust::detail::any_assign> |
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> |
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{}; // end is_void_like |
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template<typename T> |
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struct lazy_is_void_like |
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: is_void_like<typename T::type> |
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{}; // end lazy_is_void_like |
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// XXX this meta function should first check that T is actually an iterator |
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// |
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// if thrust::iterator_value<T> is defined and thrust::iterator_value<T>::type == void |
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// return false |
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// else |
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// return true |
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template<typename T> |
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struct is_output_iterator |
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: eval_if< |
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is_metafunction_defined<thrust::iterator_value<T> >::value, |
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lazy_is_void_like<thrust::iterator_value<T> >, |
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thrust::detail::true_type |
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>::type |
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{ |
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}; // end is_output_iterator |
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} // end detail |
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} // end thrust |
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