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<div class="titlepage"><div><div><h4 class="title">
<a name="spirit.karma.reference.numeric"></a><a class="link" href="numeric.html" title="Numeric"> Numeric</a>
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<dt><span class="section"><a href="numeric/unsigned_int.html"> Unsigned
Integer Number Generators (<code class="computeroutput"><span class="identifier">uint_</span></code>,
etc.)</a></span></dt>
<dt><span class="section"><a href="numeric/signed_int.html"> Signed
Integer Number Generators (<code class="computeroutput"><span class="identifier">int_</span></code>,
etc.)</a></span></dt>
<dt><span class="section"><a href="numeric/real_number.html"> Real
Number Generators (<code class="computeroutput"><span class="identifier">float_</span></code>,
<code class="computeroutput"><span class="identifier">double_</span></code>, etc.)</a></span></dt>
<dt><span class="section"><a href="numeric/boolean.html"> Boolean
Generators (<code class="computeroutput"><span class="identifier">bool_</span></code>)</a></span></dt>
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<p>
The library includes a couple of predefined objects for generating booleans,
signed and unsigned integers, and real numbers. These generators are fully
parametric. Most of the important aspects of numeric generation can be
finely adjusted to suit. This includes the radix base, the exponent, the
fraction etc. Policies control the real number generators' behavior. There
are some predefined policies covering the most common real number formats
but the user can supply her own when needed.
</p>
<p>
The numeric parsers are fine tuned (employing loop unrolling and extensive
template metaprogramming) with exceptional performance that rivals the
low level C functions such as <code class="computeroutput"><span class="identifier">ltoa</span></code>,
<code class="computeroutput"><span class="identifier">ssprintf</span></code>, and <code class="computeroutput"><span class="identifier">_gcvt</span></code>. Benchmarks reveal up to 2X speed
over the C counterparts (see here: <a class="link" href="../performance_measurements/numeric_performance.html" title="Performance of Numeric Generators">Performance
of Numeric Generators</a>). This goes to show that you can write extremely
tight generic C++ code that rivals, if not surpasses C.
</p>
<a name="spirit.karma.reference.numeric.module_header"></a><h6>
<a name="id1105445"></a>
<a class="link" href="numeric.html#spirit.karma.reference.numeric.module_header">Module Header</a>
</h6>
<pre class="programlisting"><span class="comment">// forwards to <boost/spirit/home/karma/numeric.hpp>
</span><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">spirit</span><span class="special">/</span><span class="identifier">include</span><span class="special">/</span><span class="identifier">karma_numeric</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
</pre>
<p>
Also, see <a class="link" href="../../structure/include.html" title="Include">Include Structure</a>.
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<td align="right"><div class="copyright-footer">Copyright © 2001-2010 Joel de Guzman, Hartmut Kaiser<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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