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<h2><span class="refentrytitle">Struct template tolerance_based</span></h2>
<p>boost::math::fpc::tolerance_based &#8212; Indicates if a type can be compared using a tolerance scheme. </p>
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<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../../header/boost/test/tools/floating_point_comparison_hpp.html" title="Header &lt;boost/test/tools/floating_point_comparison.hpp&gt;">boost/test/tools/floating_point_comparison.hpp</a>&gt;

</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> 
<span class="keyword">struct</span> <a class="link" href="tolerance_based.html" title="Struct template tolerance_based">tolerance_based</a> <span class="special">:</span> <span class="keyword">public</span> tolerance_based_delegate::type&lt; T, !is_array&lt; T &gt;::value &amp;&amp;!is_abstract_class_or_function&lt; T &gt;::value &gt;
<span class="special">{</span>
<span class="special">}</span><span class="special">;</span></pre></div>
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<a name="idm45313886760384"></a><h2>Description</h2>
<p>This is a metafunction that should evaluate to <code class="computeroutput">mpl::true_</code> if the type <code class="computeroutput">T</code> can be compared using a tolerance based method, typically for floating point types.</p>
<p>This metafunction can be specialized further to declare user types that are floating point (eg. boost.multiprecision). </p>
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