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| <div class="titlepage"><div><div><h3 class="title"> |
| <a name="boost_typetraits.reference.is_nothrow_move_assignable"></a><a class="link" href="is_nothrow_move_assignable.html" title="is_nothrow_move_assignable">is_nothrow_move_assignable</a> |
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| <pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">></span> |
| <span class="keyword">struct</span> <span class="identifier">is_nothrow_move_assignable</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Inherits:</strong></span> If <code class="computeroutput"><span class="identifier">T</span></code> |
| is a (possibly cv-qualified) type with a non-throwing move assignment-operator |
| or a type without move assignment-operator but with non-throwing assignment-operator, |
| then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>, |
| otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>. |
| Type <code class="computeroutput"><span class="identifier">T</span></code> must be a complete |
| type. |
| </p> |
| <p> |
| In other words, inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a> |
| only if expression <code class="computeroutput"><span class="identifier">variable1</span> <span class="special">=</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">move</span><span class="special">(</span><span class="identifier">variable2</span><span class="special">)</span></code> won't throw (<code class="computeroutput"><span class="identifier">variable1</span></code> |
| and <code class="computeroutput"><span class="identifier">variable2</span></code> are variables |
| of type <code class="computeroutput"><span class="identifier">T</span></code>). |
| </p> |
| <p> |
| <span class="bold"><strong>Compiler Compatibility:</strong></span> If the compiler |
| does not support partial-specialization of class templates, then this template |
| can not be used with function types. |
| </p> |
| <p> |
| Without some (C++11 noexcept shall work correctly) help from the compiler, |
| <code class="computeroutput"><span class="identifier">is_nothrow_move_assignable</span></code> |
| will never report that a class or struct has a non-throwing assignment-operator; |
| this is always safe, if possibly sub-optimal. Currently (February 2013) Clang |
| and GCC 4.7 have the necessary compiler support to ensure that this trait |
| "just works". |
| </p> |
| <p> |
| <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"> <span class="preprocessor">#include</span> |
| <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">is_nothrow_move_assignable</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> |
| or <code class="computeroutput"> <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code> |
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| <td align="right"><div class="copyright-footer">Copyright © 2000, 2011 Adobe Systems Inc, David Abrahams, |
| Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, |
| Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten |
| Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven |
| Watanabe<p> |
| 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>) |
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