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- <a name="boost_typetraits.reference.has_nothrow_constructor"></a><a class="link" href="has_nothrow_constructor.html" title="has_nothrow_constructor">has_nothrow_constructor</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">has_nothrow_constructor</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>
- <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">has_nothrow_default_constructor</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 T is a (possibly cv-qualified)
- type with a non-throwing default-constructor 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>
- These two traits are synonyms for each other.
- </p>
- <p>
- <span class="bold"><strong>Compiler Compatibility:</strong></span> Either requires
- C++11 <code class="computeroutput"><span class="keyword">noexcept</span></code> and <code class="computeroutput"><span class="keyword">decltype</span></code> or else some (unspecified) help from
- the compiler. Currently (June 2015) compilers more recent than Visual C++
- 8, GCC-4.3, Greenhills 6.0, Intel-11.0, and Codegear and all recent GCC versions
- have the necessary compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
- to ensure that this trait "just works". You may test to see if
- the necessary support is available by checking to see if <code class="computeroutput"><span class="identifier">defined</span><span class="special">(</span><span class="identifier">BOOST_HAS_NOTHROW_CONSTRUCTOR</span><span class="special">)</span> <span class="special">||</span> <span class="special">(!</span><span class="identifier">defined</span><span class="special">(</span><span class="identifier">BOOST_NO_CXX11_DECLTYPE</span><span class="special">)</span>
- <span class="special">&&</span> <span class="special">!</span><span class="identifier">defined</span><span class="special">(</span><span class="identifier">BOOST_NO_CXX11_NOEXCEPT</span><span class="special">))</span></code>
- is true.
- </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">has_nothrow_constructor</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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- Watanabe<p>
- Distributed under the Boost Software License, Version 1.0. (See accompanying
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