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<div class="section" id="negate">
<h1><a class="toc-backref" href="./arithmetic-operations.html#id1541">negate</a></h1>
<div class="section" id="id1005">
<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
<pre class="literal-block">
template&lt;
      typename T
    &gt;
struct <a href="./negate.html" class="identifier">negate</a>
{
    typedef <em>unspecified</em> type;
};
</pre>
</div>
<div class="section" id="id1006">
<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
<p>Returns the negative (additive inverse) of its argument.</p>
</div>
<div class="section" id="id1007">
<h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
<pre class="literal-block">
#include &lt;<a href="../../../../boost/mpl/negate.hpp" class="header">boost/mpl/negate.hpp</a>&gt;
#include &lt;<a href="../../../../boost/mpl/arithmetic.hpp" class="header">boost/mpl/arithmetic.hpp</a>&gt;
</pre>
</div>
<div class="section" id="id1008">
<h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
<p><a class="reference internal" href="./numeric-metafunction.html">Numeric Metafunction</a></p>
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<div class="section" id="id1009">
<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
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<tr><th class="head">Parameter</th>
<th class="head">Requirement</th>
<th class="head">Description</th>
</tr>
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<tbody valign="top">
<tr><td><tt class="literal"><span class="pre">T</span></tt></td>
<td><a class="reference internal" href="./integral-constant.html">Integral Constant</a></td>
<td>Operation's argument.</td>
</tr>
</tbody>
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<p>[<em>Note:</em> The requirements listed in this specification
are the ones imposed by the default implementation. See <a class="reference internal" href="./numeric-metafunction.html">Numeric Metafunction</a> concept
for the details on how to provide an implementation for a user-defined numeric type
that does not satisfy the <a class="reference internal" href="./integral-constant.html">Integral Constant</a> requirements. — <em>end note</em>]</p>
</div>
<div class="section" id="id1010">
<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
<p>For any <a class="reference internal" href="./integral-constant.html">Integral Constant</a> <tt class="literal"><span class="pre">c</span></tt>:</p>
<pre class="literal-block">
typedef <a href="./negate.html" class="identifier">negate</a>&lt;c&gt;::type r;
</pre>
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<tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first"><a class="reference internal" href="./integral-constant.html">Integral Constant</a>.</p>
</td>
</tr>
<tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p>
<pre class="last literal-block">
typedef <a href="./integral-c.html" class="identifier">integral_c</a>&lt; c::<a href="./value-type.html" class="identifier">value_type</a>, ( -c::value ) &gt; r;
</pre>
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<!-- .......................................................................... -->
<pre class="literal-block">
typedef <a href="./negate.html" class="identifier">negate</a>&lt;c&gt; r;
</pre>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first"><a class="reference internal" href="./integral-constant.html">Integral Constant</a>.</p>
</td>
</tr>
<tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p>
<pre class="last literal-block">
struct r : <a href="./negate.html" class="identifier">negate</a>&lt;c&gt;::type {};
</pre>
</td>
</tr>
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</div>
<div class="section" id="id1011">
<h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3>
<p>Amortized constant time.</p>
</div>
<div class="section" id="id1012">
<h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
<pre class="literal-block">
typedef <a href="./negate.html" class="identifier">negate</a>&lt; <a href="./int.html" class="identifier">int_</a>&lt;-10&gt; &gt;::type r;
<a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( r::value, ==, 10 );
<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same&lt; r::<a href="./value-type.html" class="identifier">value_type</a>, int > ));
</pre>
</div>
<div class="section" id="id1013">
<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
<p><a class="reference internal" href="./arithmetic-operations.html">Arithmetic Operations</a>, <a class="reference internal" href="./numeric-metafunction.html">Numeric Metafunction</a>, <a class="reference internal" href="./numeric-cast.html">numeric_cast</a>, <a class="reference internal" href="./plus.html">plus</a>, <a class="reference internal" href="./minus.html">minus</a>, <a class="reference internal" href="./times.html">times</a></p>
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