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74 lines
2.1 KiB
74 lines
2.1 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 advance.h
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* \brief Advance an iterator by a given distance.
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*/
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#pragma once
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#include <thrust/detail/config.h>
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namespace thrust
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{
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/*! \addtogroup iterators
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* \{
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*/
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/*! \p advance(i, n) increments the iterator \p i by the distance \p n.
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* If <tt>n > 0</tt> it is equivalent to executing <tt>++i</tt> \p n
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* times, and if <tt>n < 0</tt> it is equivalent to executing <tt>--i</tt>
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* \p n times. If <tt>n == 0</tt>, the call has no effect.
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*
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* \param i The iterator to be advanced.
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* \param n The distance by which to advance the iterator.
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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 Distance is an integral type that is convertible to \p InputIterator's distance type.
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*
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* \pre \p n shall be negative only for bidirectional and random access iterators.
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*
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* The following code snippet demonstrates how to use \p advance to increment
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* an iterator a given number of times.
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*
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* \code
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* #include <thrust/advance.h>
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* #include <thrust/device_vector.h>
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* ...
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* thrust::device_vector<int> vec(13);
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* thrust::device_vector<int>::iterator iter = vec.begin();
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*
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* thrust::advance(iter, 7);
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*
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* // iter - vec.begin() == 7
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* \endcode
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*
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* \see http://www.sgi.com/tech/stl/advance.html
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*/
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template <typename InputIterator, typename Distance>
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void advance(InputIterator& i, Distance n);
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/*! \} // end iterators
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*/
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} // end thrust
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#include <thrust/detail/advance.inl>
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