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<title>has_new_operator</title>
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<div class="section boost_typetraits_reference_has_new_operator">
<div class="titlepage"><div><div><h3 class="title">
<a name="boost_typetraits.reference.has_new_operator"></a><a class="link" href="has_new_operator.html" title="has_new_operator">has_new_operator</a>
</h3></div></div></div>
<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_new_operator</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 an overloaded new-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>.
</p>
<p>
<span class="bold"><strong>Compiler Compatibility:</strong></span> Not usable with
compilers that do not support "substitution failure is not an error"
(in which case BOOST_NO_SFINAE will be defined), also known to be broken
with the Borland/Codegear compiler.
</p>
<p>
<span class="bold"><strong>C++ Standard Reference:</strong></span> 12.5.
</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_new_operator</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>
</p>
<p>
<span class="bold"><strong>Examples:</strong></span>
</p>
<p>
Given:
</p>
<pre class="programlisting"><span class="keyword">class</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">void</span><span class="special">*</span> <span class="keyword">operator</span> <span class="keyword">new</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">);</span> <span class="special">};</span>
<span class="keyword">class</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">void</span><span class="special">*</span> <span class="keyword">operator</span> <span class="keyword">new</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">nothrow</span><span class="special">&);</span> <span class="special">};</span>
<span class="keyword">class</span> <span class="identifier">C</span> <span class="special">{</span> <span class="keyword">void</span><span class="special">*</span> <span class="keyword">operator</span> <span class="keyword">new</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">,</span> <span class="keyword">void</span><span class="special">*);</span> <span class="special">};</span>
<span class="keyword">class</span> <span class="identifier">D</span> <span class="special">{</span> <span class="keyword">void</span><span class="special">*</span> <span class="keyword">operator</span> <span class="keyword">new</span><span class="special">[](</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">);</span> <span class="special">};</span>
<span class="keyword">class</span> <span class="identifier">E</span> <span class="special">{</span> <span class="keyword">void</span><span class="special">*</span> <span class="keyword">operator</span> <span class="keyword">new</span><span class="special">[](</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">nothrow</span><span class="special">&);</span> <span class="special">};</span>
<span class="keyword">class</span> <span class="identifier">F</span> <span class="special">{</span> <span class="keyword">void</span><span class="special">*</span> <span class="keyword">operator</span> <span class="keyword">new</span><span class="special">[](</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">,</span> <span class="keyword">void</span><span class="special">*);</span> <span class="special">};</span>
</pre>
<p>
Then:
</p>
<div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="identifier">has_new_operator</span><span class="special"><</span><span class="identifier">A</span><span class="special">></span></code>
inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
</p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="identifier">has_new_operator</span><span class="special"><</span><span class="identifier">B</span><span class="special">></span></code>
inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
</p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="identifier">has_new_operator</span><span class="special"><</span><span class="identifier">C</span><span class="special">></span></code>
inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
</p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="identifier">has_new_operator</span><span class="special"><</span><span class="identifier">D</span><span class="special">></span></code>
inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
</p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="identifier">has_new_operator</span><span class="special"><</span><span class="identifier">E</span><span class="special">></span></code>
inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
</p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="identifier">has_new_operator</span><span class="special"><</span><span class="identifier">F</span><span class="special">></span></code>
inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
</p></blockquote></div>
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