/usr/include/thrust/detail/trivial_sequence.h is in libthrust-dev 1.6.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 | /*
* Copyright 2008-2012 NVIDIA Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*! \file trivial_sequence.h
* \brief Container-like class for wrapping sequences. The wrapped
* sequence always has trivial iterators, even when the input
* sequence does not.
*/
#pragma once
#include <thrust/iterator/iterator_traits.h>
#include <thrust/detail/type_traits.h>
#include <thrust/detail/temporary_array.h>
namespace thrust
{
namespace detail
{
// never instantiated
template<typename Iterator, typename is_trivial> struct _trivial_sequence { };
// trivial case
template<typename Iterator>
struct _trivial_sequence<Iterator, thrust::detail::true_type>
{
typedef Iterator iterator_type;
Iterator first, last;
_trivial_sequence(Iterator _first, Iterator _last) : first(_first), last(_last)
{
// std::cout << "trivial case" << std::endl;
}
iterator_type begin() { return first; }
iterator_type end() { return last; }
};
// non-trivial case
template<typename Iterator>
struct _trivial_sequence<Iterator, thrust::detail::false_type>
{
typedef typename thrust::iterator_system<Iterator>::type iterator_system;
typedef typename thrust::iterator_value<Iterator>::type iterator_value;
typedef typename thrust::detail::temporary_array<iterator_value, iterator_system>::iterator iterator_type;
thrust::detail::temporary_array<iterator_value, iterator_system> buffer;
_trivial_sequence(Iterator first, Iterator last) : buffer(first, last)
{
// std::cout << "non-trivial case" << std::endl;
}
iterator_type begin() { return buffer.begin(); }
iterator_type end() { return buffer.end(); }
};
template <typename Iterator>
struct trivial_sequence : public detail::_trivial_sequence<Iterator, typename thrust::detail::is_trivial_iterator<Iterator>::type>
{
typedef _trivial_sequence<Iterator, typename thrust::detail::is_trivial_iterator<Iterator>::type> super_t;
trivial_sequence(Iterator first, Iterator last) : super_t(first, last) { }
};
} // end namespace detail
} // end namespace thrust
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