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67 lines
1.7 KiB
67 lines
1.7 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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#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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