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<a name="math_toolkit.fp_facets"></a><a class="link" href="fp_facets.html" title="Facets for Floating-Point Infinities and NaNs">Facets for Floating-Point Infinities
    and NaNs</a>
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<h5>
<a name="math_toolkit.fp_facets.h0"></a>
      <span class="phrase"><a name="math_toolkit.fp_facets.synopsis"></a></span><a class="link" href="fp_facets.html#math_toolkit.fp_facets.synopsis">Synopsis</a>
    </h5>
<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">{</span> <span class="keyword">namespace</span> <span class="identifier">math</span>
<span class="special">{</span>
  <span class="comment">// Values for flags.</span>
  <span class="keyword">const</span> <span class="keyword">int</span> <span class="identifier">legacy</span><span class="special">;</span>
  <span class="keyword">const</span> <span class="keyword">int</span> <span class="identifier">signed_zero</span><span class="special">;</span>
  <span class="keyword">const</span> <span class="keyword">int</span> <span class="identifier">trap_infinity</span><span class="special">;</span>
  <span class="keyword">const</span> <span class="keyword">int</span> <span class="identifier">trap_nan</span><span class="special">;</span>

  <span class="keyword">template</span><span class="special">&lt;</span>
      <span class="keyword">class</span> <span class="identifier">CharType</span><span class="special">,</span>
      <span class="keyword">class</span> <span class="identifier">OutputIterator</span> <span class="special">=</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">ostreambuf_iterator</span><span class="special">&lt;</span><span class="identifier">CharType</span><span class="special">&gt;</span>
  <span class="special">&gt;</span>
  <span class="keyword">class</span> <span class="identifier">nonfinite_num_put</span> <span class="special">:</span> <span class="keyword">public</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">num_put</span><span class="special">&lt;</span><span class="identifier">CharType</span><span class="special">,</span> <span class="identifier">OutputIterator</span><span class="special">&gt;</span>
  <span class="special">{</span>
  <span class="keyword">public</span><span class="special">:</span>
      <span class="keyword">explicit</span> <span class="identifier">nonfinite_num_put</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">flags</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
  <span class="special">};</span>

  <span class="keyword">template</span><span class="special">&lt;</span>
      <span class="keyword">class</span> <span class="identifier">CharType</span><span class="special">,</span>
      <span class="keyword">class</span> <span class="identifier">InputIterator</span> <span class="special">=</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">istreambuf_iterator</span><span class="special">&lt;</span><span class="identifier">CharType</span><span class="special">&gt;</span>
  <span class="special">&gt;</span>
  <span class="keyword">class</span> <span class="identifier">nonfinite_num_get</span> <span class="special">:</span> <span class="keyword">public</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">num_get</span><span class="special">&lt;</span><span class="identifier">CharType</span><span class="special">,</span> <span class="identifier">InputIterator</span><span class="special">&gt;</span>
  <span class="special">{</span>
  <span class="keyword">public</span><span class="special">:</span>
      <span class="keyword">explicit</span> <span class="identifier">nonfinite_num_get</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">flags</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>  <span class="comment">// legacy, sign_zero ...</span>
  <span class="special">};</span>
<span class="special">}}</span> <span class="comment">// namespace boost namespace math</span>
</pre>
<p>
      To use these facets
    </p>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">\</span><span class="identifier">math</span><span class="special">\</span><span class="identifier">special_functions</span><span class="special">\</span><span class="identifier">nonfinite_num_facets</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
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