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277 lines
10 KiB
277 lines
10 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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/*! \file logical.h
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* \brief Logical operations on ranges
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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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namespace thrust
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{
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/*! \addtogroup reductions
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* \{
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* \addtogroup logical
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* \ingroup reductions
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* \{
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*/
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/*! \p all_of determines whether all elements in a range satify a predicate.
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* Specifically, \p all_of returns \c true if <tt>pred(*i)</tt> is \c true
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* for every iterator \c i in the range <tt>[first, last)</tt> and
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* \c false otherwise.
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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 pred A predicate used to test range elements.
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* \return \c true, if all elements satisfy the predicate; \c false, otherwise.
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*
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* \tparam DerivedPolicy The name of the derived execution policy.
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* \tparam InputIterator is a model of <a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>,
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* \tparam Predicate must be a model of <a href="http://www.sgi.com/tech/stl/Predicate.html">Predicate</a>.
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*
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* \code
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* #include <thrust/logical.h>
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* #include <thrust/functional.h>
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* #include <thrust/execution_policy.h>
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* ...
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* bool A[3] = {true, true, false};
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*
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* thrust::all_of(thrust::host, A, A + 2, thrust::identity<bool>()); // returns true
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* thrust::all_of(thrust::host, A, A + 3, thrust::identity<bool>()); // returns false
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*
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* // empty range
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* thrust::all_of(thrust::host, A, A, thrust::identity<bool>()); // returns false
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*
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* \endcode
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*
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* \see any_of
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* \see none_of
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* \see transform_reduce
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*/
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template <typename DerivedPolicy, typename InputIterator, typename Predicate>
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bool all_of(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, InputIterator first, InputIterator last, Predicate pred);
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/*! \p all_of determines whether all elements in a range satify a predicate.
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* Specifically, \p all_of returns \c true if <tt>pred(*i)</tt> is \c true
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* for every iterator \c i in the range <tt>[first, last)</tt> and
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* \c false otherwise.
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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 pred A predicate used to test range elements.
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* \return \c true, if all elements satisfy the predicate; \c false, otherwise.
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*
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* \tparam InputIterator is a model of <a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>,
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* \tparam Predicate must be a model of <a href="http://www.sgi.com/tech/stl/Predicate.html">Predicate</a>.
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*
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* \code
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* #include <thrust/logical.h>
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* #include <thrust/functional.h>
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* ...
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* bool A[3] = {true, true, false};
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*
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* thrust::all_of(A, A + 2, thrust::identity<bool>()); // returns true
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* thrust::all_of(A, A + 3, thrust::identity<bool>()); // returns false
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*
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* // empty range
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* thrust::all_of(A, A, thrust::identity<bool>()); // returns false
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*
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* \endcode
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*
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* \see any_of
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* \see none_of
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* \see transform_reduce
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*/
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template <typename InputIterator, typename Predicate>
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bool all_of(InputIterator first, InputIterator last, Predicate pred);
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/*! \p any_of determines whether any element in a range satifies a predicate.
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* Specifically, \p any_of returns \c true if <tt>pred(*i)</tt> is \c true
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* for any iterator \c i in the range <tt>[first, last)</tt> and
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* \c false otherwise.
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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 pred A predicate used to test range elements.
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* \return \c true, if any element satisfies the predicate; \c false, otherwise.
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*
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* \tparam DerivedPolicy The name of the derived execution policy.
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* \tparam InputIterator is a model of <a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>,
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* \tparam Predicate must be a model of <a href="http://www.sgi.com/tech/stl/Predicate.html">Predicate</a>.
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*
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* \code
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* #include <thrust/logical.h>
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* #include <thrust/functional.h>
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* #include <thrust/execution_policy.h>
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* ...
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* bool A[3] = {true, true, false};
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*
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* thrust::any_of(thrust::host, A, A + 2, thrust::identity<bool>()); // returns true
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* thrust::any_of(thrust::host, A, A + 3, thrust::identity<bool>()); // returns true
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*
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* thrust::any_of(thrust::host, A + 2, A + 3, thrust::identity<bool>()); // returns false
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*
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* // empty range
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* thrust::any_of(thrust::host, A, A, thrust::identity<bool>()); // returns false
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* \endcode
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*
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* \see all_of
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* \see none_of
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* \see transform_reduce
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*/
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template <typename DerivedPolicy, typename InputIterator, typename Predicate>
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bool any_of(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, InputIterator first, InputIterator last, Predicate pred);
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/*! \p any_of determines whether any element in a range satifies a predicate.
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* Specifically, \p any_of returns \c true if <tt>pred(*i)</tt> is \c true
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* for any iterator \c i in the range <tt>[first, last)</tt> and
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* \c false otherwise.
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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 pred A predicate used to test range elements.
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* \return \c true, if any element satisfies the predicate; \c false, otherwise.
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*
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* \tparam InputIterator is a model of <a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>,
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* \tparam Predicate must be a model of <a href="http://www.sgi.com/tech/stl/Predicate.html">Predicate</a>.
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*
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* \code
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* #include <thrust/logical.h>
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* #include <thrust/functional.h>
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* ...
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* bool A[3] = {true, true, false};
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*
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* thrust::any_of(A, A + 2, thrust::identity<bool>()); // returns true
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* thrust::any_of(A, A + 3, thrust::identity<bool>()); // returns true
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*
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* thrust::any_of(A + 2, A + 3, thrust::identity<bool>()); // returns false
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*
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* // empty range
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* thrust::any_of(A, A, thrust::identity<bool>()); // returns false
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* \endcode
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*
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* \see all_of
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* \see none_of
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* \see transform_reduce
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*/
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template <typename InputIterator, typename Predicate>
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bool any_of(InputIterator first, InputIterator last, Predicate pred);
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/*! \p none_of determines whether no element in a range satifies a predicate.
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* Specifically, \p none_of returns \c true if there is no iterator \c i in
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* the range <tt>[first, last)</tt> such that <tt>pred(*i)</tt> is \c true,
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* and \c false otherwise.
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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 pred A predicate used to test range elements.
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* \return \c true, if no element satisfies the predicate; \c false, otherwise.
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*
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* \tparam DerivedPolicy The name of the derived execution policy.
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* \tparam InputIterator is a model of <a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>,
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* \tparam Predicate must be a model of <a href="http://www.sgi.com/tech/stl/Predicate.html">Predicate</a>.
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*
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* \code
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* #include <thrust/logical.h>
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* #include <thrust/functional.h>
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* #include <thrust/execution_policy.h>
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* ...
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* bool A[3] = {true, true, false};
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*
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* thrust::none_of(thrust::host, A, A + 2, thrust::identity<bool>()); // returns false
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* thrust::none_of(thrust::host, A, A + 3, thrust::identity<bool>()); // returns false
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*
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* thrust::none_of(thrust::host, A + 2, A + 3, thrust::identity<bool>()); // returns true
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*
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* // empty range
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* thrust::none_of(thrust::host, A, A, thrust::identity<bool>()); // returns true
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* \endcode
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*
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* \see all_of
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* \see any_of
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* \see transform_reduce
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*/
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template <typename DerivedPolicy, typename InputIterator, typename Predicate>
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bool none_of(const thrust::detail::execution_policy_base<DerivedPolicy> &exec, InputIterator first, InputIterator last, Predicate pred);
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/*! \p none_of determines whether no element in a range satifies a predicate.
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* Specifically, \p none_of returns \c true if there is no iterator \c i in
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* the range <tt>[first, last)</tt> such that <tt>pred(*i)</tt> is \c true,
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* and \c false otherwise.
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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 pred A predicate used to test range elements.
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* \return \c true, if no element satisfies the predicate; \c false, otherwise.
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*
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* \tparam InputIterator is a model of <a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>,
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* \tparam Predicate must be a model of <a href="http://www.sgi.com/tech/stl/Predicate.html">Predicate</a>.
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*
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* \code
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* #include <thrust/logical.h>
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* #include <thrust/functional.h>
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* ...
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* bool A[3] = {true, true, false};
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*
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* thrust::none_of(A, A + 2, thrust::identity<bool>()); // returns false
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* thrust::none_of(A, A + 3, thrust::identity<bool>()); // returns false
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*
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* thrust::none_of(A + 2, A + 3, thrust::identity<bool>()); // returns true
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*
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* // empty range
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* thrust::none_of(A, A, thrust::identity<bool>()); // returns true
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* \endcode
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*
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* \see all_of
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* \see any_of
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* \see transform_reduce
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*/
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template <typename InputIterator, typename Predicate>
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bool none_of(InputIterator first, InputIterator last, Predicate pred);
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/*! \} // end logical
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* \} // end reductions
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*/
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} // end namespace thrust
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#include <thrust/detail/logical.inl>
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