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| <div class="titlepage"><div><div><h3 class="title"> |
| <a name="boost_multiprecision.ref.cpp_dec_ref"></a><a class="link" href="cpp_dec_ref.html" title="cpp_dec_float">cpp_dec_float</a> |
| </h3></div></div></div> |
| <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">multiprecision</span><span class="special">{</span> |
| |
| <span class="keyword">template</span> <span class="special"><</span><span class="keyword">unsigned</span> <span class="identifier">Digits10</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">ExponentType</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">int32_t</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Allocator</span> <span class="special">=</span> <span class="keyword">void</span><span class="special">></span> |
| <span class="keyword">class</span> <span class="identifier">cpp_dec_float</span><span class="special">;</span> |
| |
| <span class="keyword">typedef</span> <span class="identifier">number</span><span class="special"><</span><span class="identifier">cpp_dec_float</span><span class="special"><</span><span class="number">50</span><span class="special">></span> <span class="special">></span> <span class="identifier">cpp_dec_float_50</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="identifier">number</span><span class="special"><</span><span class="identifier">cpp_dec_float</span><span class="special"><</span><span class="number">100</span><span class="special">></span> <span class="special">></span> <span class="identifier">cpp_dec_float_100</span><span class="special">;</span> |
| |
| <span class="special">}}</span> <span class="comment">// namespaces</span> |
| </pre> |
| <p> |
| Class template <code class="computeroutput"><span class="identifier">cpp_dec_float</span></code> |
| fulfils all of the requirements for a <a class="link" href="backendconc.html" title="Backend Requirements">Backend</a> |
| type. Its members and non-member functions are deliberately not documented: |
| these are considered implementation details that are subject to change. |
| </p> |
| <p> |
| The class takes three template parameters: |
| </p> |
| <div class="variablelist"> |
| <p class="title"><b></b></p> |
| <dl class="variablelist"> |
| <dt><span class="term">Digits10</span></dt> |
| <dd><p> |
| The number of decimal digits precision the type should support. Note |
| that this type does not normally perform any dynamic memory allocation, |
| and as a result the <code class="computeroutput"><span class="identifier">Digits10</span></code> |
| template argument should not be set too high or the class's size will |
| grow unreasonably large. |
| </p></dd> |
| <dt><span class="term">ExponentType</span></dt> |
| <dd><p> |
| A signed integer type that represents the exponent of the number |
| </p></dd> |
| <dt><span class="term">Allocator</span></dt> |
| <dd><p> |
| The allocator used: defaults to type <code class="computeroutput"><span class="keyword">void</span></code>, |
| meaning all storage is within the class, and no dynamic allocation |
| is performed, but can be set to a standard library allocator if dynamic |
| allocation makes more sense. |
| </p></dd> |
| </dl> |
| </div> |
| <p> |
| The type of <code class="computeroutput"><span class="identifier">number_category</span><span class="special"><</span><span class="identifier">cpp_dec_float</span><span class="special"><</span><span class="identifier">Args</span><span class="special">...></span> <span class="special">>::</span><span class="identifier">type</span></code> is <code class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">int_</span><span class="special"><</span><span class="identifier">number_kind_floating_point</span><span class="special">></span></code>. |
| </p> |
| <p> |
| More information on this type can be found in the <a class="link" href="../tut/floats/cpp_dec_float.html" title="cpp_dec_float">tutorial</a>. |
| </p> |
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| <td align="right"><div class="copyright-footer">Copyright © 2002-2013 John Maddock and Christopher Kormanyos<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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