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  26. <div class="titlepage"><div><div><h3 class="title">
  27. <a name="boost_typetraits.reference.is_nothrow_move_constructible"></a><a class="link" href="is_nothrow_move_constructible.html" title="is_nothrow_move_constructible">is_nothrow_move_constructible</a>
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  29. <pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span>
  30. <span class="keyword">struct</span> <span class="identifier">is_nothrow_move_constructible</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>
  31. </pre>
  32. <p>
  33. <span class="bold"><strong>Inherits:</strong></span> If T is a (possibly cv-qualified)
  34. type with a non-throwing move-constructor or a type without move-constructor
  35. but with non-throwing copy-constructor, then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
  36. otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
  37. Type <code class="computeroutput"><span class="identifier">T</span></code> must be a complete
  38. type.
  39. </p>
  40. <p>
  41. In other words, inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>
  42. only if expression <code class="computeroutput"><span class="identifier">T</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">variable1</span><span class="special">))</span></code> won't throw (<code class="computeroutput"><span class="identifier">variable1</span></code>
  43. is a variable of type <code class="computeroutput"><span class="identifier">T</span></code>).
  44. </p>
  45. <p>
  46. <span class="bold"><strong>Compiler Compatibility:</strong></span> Without some (C++11
  47. noexcept shall work correctly) help from the compiler, <code class="computeroutput"><span class="identifier">is_nothrow_move_constructible</span></code>
  48. will never report that a class or struct has a non-throwing copy-constructor;
  49. this is always safe, if possibly sub-optimal. Currently (February 2013) MSVC-12.0,
  50. Clang and GCC 4.7 have the necessary compiler support to ensure that this
  51. trait "just works".
  52. </p>
  53. <p>
  54. <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"> <span class="preprocessor">#include</span>
  55. <span class="special">&lt;</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_constructible</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
  56. or <code class="computeroutput"> <span class="preprocessor">#include</span> <span class="special">&lt;</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">&gt;</span></code>
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  62. Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
  63. Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
  64. Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
  65. Watanabe<p>
  66. Distributed under the Boost Software License, Version 1.0. (See accompanying
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