boost-react-native-bundle

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<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>Move algorithms</title> <link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> <link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> <link rel="up" href="../move.html" title="Chapter 19. Boost.Move"> <link rel="prev" href="move_inserters.html" title="Move inserters"> <link rel="next" href="emulation_limitations.html" title="Emulation limitations"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table cellpadding="2" width="100%"><tr> <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../boost.png"></td> <td align="center"><a href="../../../index.html">Home</a></td> <td align="center"><a href="../../../libs/libraries.htm">Libraries</a></td> <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> <td align="center"><a href="../../../more/index.htm">More</a></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="move_inserters.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../move.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="emulation_limitations.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> </div> <div class="section"> <div class="titlepage"><div><div><h2 class="title" style="clear: both"> <a name="move.move_algorithms"></a><a class="link" href="move_algorithms.html" title="Move algorithms">Move algorithms</a> </h2></div></div></div> The standard library offers several copy-based algorithms. Some of them, like <code class="computeroutput">std::copy</code> or <code class="computeroutput">std::uninitialized_copy</code> are basic building blocks for containers and other data structures. This library offers move-based functions for those purposes: <pre class="programlisting">template<typename I, typename O> O move(I, I, O); template<typename I, typename O> O move_backward(I, I, O); template<typename I, typename F> F uninitialized_move(I, I, F); template<typename I, typename F> F uninitialized_copy_or_move(I, I, F); </pre> The first 3 are move variations of their equivalent copy algorithms, but copy assignment and copy construction are replaced with move assignment and construction. The last one has the same behaviour as <code class="computeroutput">std::uninitialized_copy</code> but since several standand library implementations don't play very well with <code class="computeroutput">move_iterator</code>s, this version is a portable version for those willing to use move iterators. <pre class="programlisting">#include "movable.hpp" #include <boost/move/algorithm.hpp> #include <cassert> #include <boost/aligned_storage.hpp> int main() { const std::size_t ArraySize = 10; movable movable_array[ArraySize]; movable movable_array2[ArraySize]; //move boost::move(&movable_array2[0], &movable_array2[ArraySize], &movable_array[0]); assert(movable_array2[0].moved()); assert(!movable_array[0].moved()); //move backward boost::move_backward(&movable_array[0], &movable_array[ArraySize], &movable_array2[ArraySize]); assert(movable_array[0].moved()); assert(!movable_array2[0].moved()); //uninitialized_move boost::aligned_storage< sizeof(movable)*ArraySize , boost::alignment_of<movable>::value>::type storage; movable *raw_movable = static_cast<movable*>(static_cast<void*>(&storage)); boost::uninitialized_move(&movable_array2[0], &movable_array2[ArraySize], raw_movable); assert(movable_array2[0].moved()); assert(!raw_movable[0].moved()); return 0; } </pre> </div> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <td align="left"></td> <td align="right"><div class="copyright-footer">Copyright © 2008-2014 Ion Gaztanaga Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) </div></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="move_inserters.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../move.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="emulation_limitations.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>