derek.holloway
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271 lines
11 KiB
C++
271 lines
11 KiB
C++
/*
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* Copyright 2008-2013 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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/*! \file sequence.h
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* \brief Fills a range with a sequence of numbers
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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/execution_policy.h>
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THRUST_NAMESPACE_BEGIN
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/*! \addtogroup transformations
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* \{
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*/
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/*! \p sequence fills the range <tt>[first, last)</tt> with a sequence of numbers.
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*
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* For each iterator \c i in the range <tt>[first, last)</tt>, this version of
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* \p sequence performs the assignment <tt>*i = (i - first)</tt>.
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*
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* The algorithm's execution is parallelized as determined by \p exec.
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*
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* \param exec The execution policy to use for parallelization.
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* \param first The beginning of the sequence.
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* \param last The end of the sequence.
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*
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* \tparam DerivedPolicy The name of the derived execution policy.
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* \tparam ForwardIterator is a model of <a href="https://en.cppreference.com/w/cpp/iterator/forward_iterator">Forward
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* Iterator</a>, and \p ForwardIterator is mutable, and if \c x and \c y are objects of \c ForwardIterator's \c
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* value_type, then <tt>x + y</tt> is defined, and if \c T is \p ForwardIterator's \c value_type, then <tt>T(0)</tt> is
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* defined.
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*
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* The following code snippet demonstrates how to use \p sequence to fill a range
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* with a sequence of numbers using the \p thrust::host execution policy for parallelization:
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*
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* \code
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* #include <thrust/sequence.h>
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* #include <thrust/execution_policy.h>
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* ...
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* const int N = 10;
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* int A[N];
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* thrust::sequence(thrust::host, A, A + 10);
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* // A is now {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
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* \endcode
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*
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* \note Unlike the similar C++ STL function \c std::iota, \p sequence offers no
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* guarantee on order of execution.
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*
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* \see https://en.cppreference.com/w/cpp/algorithm/iota
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*/
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template <typename DerivedPolicy, typename ForwardIterator>
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THRUST_HOST_DEVICE void
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sequence(const thrust::detail::execution_policy_base<DerivedPolicy>& exec, ForwardIterator first, ForwardIterator last);
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/*! \p sequence fills the range <tt>[first, last)</tt> with a sequence of numbers.
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*
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* For each iterator \c i in the range <tt>[first, last)</tt>, this version of
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* \p sequence performs the assignment <tt>*i = (i - first)</tt>.
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*
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* \param first The beginning of the sequence.
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* \param last The end of the sequence.
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*
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* \tparam ForwardIterator is a model of <a href="https://en.cppreference.com/w/cpp/iterator/forward_iterator">Forward
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* Iterator</a>, and \p ForwardIterator is mutable, and if \c x and \c y are objects of \c ForwardIterator's \c
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* value_type, then <tt>x + y</tt> is defined, and if \c T is \p ForwardIterator's \c value_type, then <tt>T(0)</tt> is
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* defined.
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*
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* The following code snippet demonstrates how to use \p sequence to fill a range
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* with a sequence of numbers.
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*
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* \code
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* #include <thrust/sequence.h>
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* ...
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* const int N = 10;
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* int A[N];
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* thrust::sequence(A, A + 10);
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* // A is now {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
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* \endcode
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*
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* \note Unlike the similar C++ STL function \c std::iota, \p sequence offers no
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* guarantee on order of execution.
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*
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* \see https://en.cppreference.com/w/cpp/algorithm/iota
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*/
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template <typename ForwardIterator>
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void sequence(ForwardIterator first, ForwardIterator last);
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/*! \p sequence fills the range <tt>[first, last)</tt> with a sequence of numbers.
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*
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* For each iterator \c i in the range <tt>[first, last)</tt>, this version of
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* \p sequence performs the assignment <tt>*i = init + (i - first)</tt>.
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*
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* The algorithm's execution is parallelized as determined by \p exec.
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*
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* \param exec The execution policy to use for parallelization.
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* \param first The beginning of the sequence.
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* \param last The end of the sequence.
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* \param init The first value of the sequence of numbers.
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*
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* \tparam DerivedPolicy The name of the derived execution policy.
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* \tparam ForwardIterator is a model of <a href="https://en.cppreference.com/w/cpp/iterator/forward_iterator">Forward
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* Iterator</a>, and \p ForwardIterator is mutable, and if \c x and \c y are objects of \c ForwardIterator's \c
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* value_type, then <tt>x + y</tt> is defined, and if \c T is \p ForwardIterator's \c value_type, then <tt>T(0)</tt> is
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* defined. \tparam T is a model of <a href="https://en.cppreference.com/w/cpp/named_req/CopyAssignable">Assignable</a>,
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* and \p T is convertible to \p ForwardIterator's \c value_type.
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*
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* The following code snippet demonstrates how to use \p sequence to fill a range
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* with a sequence of numbers starting from the value 1 using the \p thrust::host execution
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* policy for parallelization:
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*
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* \code
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* #include <thrust/sequence.h>
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* #include <thrust/execution_policy.h>
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* ...
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* const int N = 10;
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* int A[N];
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* thrust::sequence(thrust::host, A, A + 10, 1);
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* // A is now {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
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* \endcode
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*
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* \note Unlike the similar C++ STL function \c std::iota, \p sequence offers no
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* guarantee on order of execution.
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*
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* \see https://en.cppreference.com/w/cpp/algorithm/iota
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*/
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template <typename DerivedPolicy, typename ForwardIterator, typename T>
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THRUST_HOST_DEVICE void sequence(
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const thrust::detail::execution_policy_base<DerivedPolicy>& exec, ForwardIterator first, ForwardIterator last, T init);
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/*! \p sequence fills the range <tt>[first, last)</tt> with a sequence of numbers.
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*
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* For each iterator \c i in the range <tt>[first, last)</tt>, this version of
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* \p sequence performs the assignment <tt>*i = init + (i - first)</tt>.
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*
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* \param first The beginning of the sequence.
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* \param last The end of the sequence.
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* \param init The first value of the sequence of numbers.
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*
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* \tparam ForwardIterator is a model of <a href="https://en.cppreference.com/w/cpp/iterator/forward_iterator">Forward
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* Iterator</a>, and \p ForwardIterator is mutable, and if \c x and \c y are objects of \c ForwardIterator's \c
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* value_type, then <tt>x + y</tt> is defined, and if \c T is \p ForwardIterator's \c value_type, then <tt>T(0)</tt> is
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* defined. \tparam T is a model of <a href="https://en.cppreference.com/w/cpp/named_req/CopyAssignable">Assignable</a>,
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* and \p T is convertible to \p ForwardIterator's \c value_type.
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*
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* The following code snippet demonstrates how to use \p sequence to fill a range
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* with a sequence of numbers starting from the value 1.
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*
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* \code
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* #include <thrust/sequence.h>
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* ...
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* const int N = 10;
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* int A[N];
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* thrust::sequence(A, A + 10, 1);
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* // A is now {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
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* \endcode
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*
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* \note Unlike the similar C++ STL function \c std::iota, \p sequence offers no
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* guarantee on order of execution.
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*
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* \see https://en.cppreference.com/w/cpp/algorithm/iota
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*/
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template <typename ForwardIterator, typename T>
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void sequence(ForwardIterator first, ForwardIterator last, T init);
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/*! \p sequence fills the range <tt>[first, last)</tt> with a sequence of numbers.
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*
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* For each iterator \c i in the range <tt>[first, last)</tt>, this version of
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* \p sequence performs the assignment <tt>*i = init + step * (i - first)</tt>.
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*
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* The algorithm's execution is parallelized as determined by \p exec.
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*
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* \param exec The execution policy to use for parallelization.
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* \param first The beginning of the sequence.
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* \param last The end of the sequence.
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* \param init The first value of the sequence of numbers
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* \param step The difference between consecutive elements.
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*
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* \tparam DerivedPolicy The name of the derived execution policy.
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* \tparam ForwardIterator is a model of <a href="https://en.cppreference.com/w/cpp/iterator/forward_iterator">Forward
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* Iterator</a>, and \p ForwardIterator is mutable, and if \c x and \c y are objects of \c ForwardIterator's \c
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* value_type, then <tt>x + y</tt> is defined, and if \c T is \p ForwardIterator's \c value_type, then <tt>T(0)</tt> is
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* defined. \tparam T is a model of <a href="https://en.cppreference.com/w/cpp/named_req/CopyAssignable">Assignable</a>,
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* and \p T is convertible to \p ForwardIterator's \c value_type.
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*
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* The following code snippet demonstrates how to use \p sequence to fill a range
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* with a sequence of numbers starting from the value 1 with a step size of 3 using the \p thrust::host
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* execution policy for parallelization:
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*
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* \code
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* #include <thrust/sequence.h>
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* #include <thrust/execution_policy.h>
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* ...
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* const int N = 10;
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* int A[N];
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* thrust::sequence(thrust::host, A, A + 10, 1, 3);
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* // A is now {1, 4, 7, 10, 13, 16, 19, 22, 25, 28}
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* \endcode
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*
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* \note Unlike the similar C++ STL function \c std::iota, \p sequence offers no
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* guarantee on order of execution.
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*
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* \see https://en.cppreference.com/w/cpp/algorithm/iota
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*/
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template <typename DerivedPolicy, typename ForwardIterator, typename T>
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THRUST_HOST_DEVICE void sequence(
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const thrust::detail::execution_policy_base<DerivedPolicy>& exec,
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ForwardIterator first,
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ForwardIterator last,
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T init,
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T step);
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/*! \p sequence fills the range <tt>[first, last)</tt> with a sequence of numbers.
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*
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* For each iterator \c i in the range <tt>[first, last)</tt>, this version of
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* \p sequence performs the assignment <tt>*i = init + step * (i - first)</tt>.
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*
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* \param first The beginning of the sequence.
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* \param last The end of the sequence.
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* \param init The first value of the sequence of numbers
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* \param step The difference between consecutive elements.
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*
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* \tparam ForwardIterator is a model of <a href="https://en.cppreference.com/w/cpp/iterator/forward_iterator">Forward
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* Iterator</a>, and \p ForwardIterator is mutable, and if \c x and \c y are objects of \c ForwardIterator's \c
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* value_type, then <tt>x + y</tt> is defined, and if \c T is \p ForwardIterator's \c value_type, then <tt>T(0)</tt> is
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* defined. \tparam T is a model of <a href="https://en.cppreference.com/w/cpp/named_req/CopyAssignable">Assignable</a>,
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* and \p T is convertible to \p ForwardIterator's \c value_type.
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*
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* The following code snippet demonstrates how to use \p sequence to fill a range
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* with a sequence of numbers starting from the value 1 with a step size of 3.
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*
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* \code
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* #include <thrust/sequence.h>
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* ...
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* const int N = 10;
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* int A[N];
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* thrust::sequence(A, A + 10, 1, 3);
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* // A is now {1, 4, 7, 10, 13, 16, 19, 22, 25, 28}
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* \endcode
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*
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* \note Unlike the similar C++ STL function \c std::iota, \p sequence offers no
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* guarantee on order of execution.
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*
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* \see https://en.cppreference.com/w/cpp/algorithm/iota
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*/
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template <typename ForwardIterator, typename T>
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void sequence(ForwardIterator first, ForwardIterator last, T init, T step);
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/*! \} // end transformations
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*/
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THRUST_NAMESPACE_END
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#include <thrust/detail/sequence.inl>
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