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  26 <div class="titlepage"><div><div><h3 class="title">
  27 <a name="boost_multiprecision.tut.limits"></a><a class="link" href="limits.html" title="Numeric Limits">Numeric Limits</a>
  28 </h3></div></div></div>
  29 <div class="toc"><dl class="toc">
  30 <dt><span class="section"><a href="limits/constants.html">std::numeric_limits&lt;&gt;
  31         constants</a></span></dt>
  32 <dt><span class="section"><a href="limits/functions.html">std::numeric_limits&lt;&gt;
  33         functions</a></span></dt>
  34 <dt><span class="section"><a href="limits/limits32.html">Numeric limits
  35         for 32-bit platform</a></span></dt>
  36 <dt><span class="section"><a href="limits/how_to_tell.html">How to
  37         Determine the Kind of a Number From <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">numeric_limits</span></code></a></span></dt>
  38 </dl></div>
  39 <p>
  40         Boost.Multiprecision tries hard to implement <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">numeric_limits</span></code>
  41         for all types as far as possible and meaningful because experience with Boost.Math
  42         has shown that this aids portability.
  43       </p>
  44 <p>
  45         The <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3690.pdf" target="_top">C++
  46         standard library</a> defines <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">numeric_limits</span></code>
  47         in section 18.3.2.
  48       </p>
  49 <p>
  50         This in turn refers to the C standard <a href="http://www.open-std.org/jtc1/sc22/wg11/docs/n507.pdf" target="_top">SC22/WG11
  51         N507 DRAFT INTERNATIONAL ISO/IEC STANDARD WD 10967-1</a> Information
  52         technology Language independent arithmetic Part 1: Integer and Floating point
  53         arithmetic.
  54       </p>
  55 <p>
  56         That C Standard in turn refers to
  57       </p>
  58 <p>
  59         <a href="http://754r.ucbtest.org/standards/754.pdf" target="_top">IEEE754 IEEE Standard
  60         for Binary Floating-Point Arithmetic</a>
  61       </p>
  62 <p>
  63         There is a useful summary at <a href="http://www.cplusplus.com/reference/limits/numeric_limits/" target="_top">C++
  64         reference</a>.
  65       </p>
  66 <p>
  67         The chosen backend often determines how completely <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">numeric_limits</span></code>
  68         is available.
  69       </p>
  70 <p>
  71         Compiler options, processor type, and definition of macros or assembler instructions
  72         to control denormal numbers will alter the values in the tables given below.
  73       </p>
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  77 <th align="left">Warning</th>
  78 </tr>
  79 <tr><td align="left" valign="top"><p>
  80           GMP's <code class="computeroutput"><span class="identifier">mpf_t</span></code> does not have
  81           a concept of overflow: operations that lead to overflow eventually run
  82           of out of resources and terminate with stack overflow (often after several
  83           seconds).
  84         </p></td></tr>
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  89 <td align="right"><div class="copyright-footer">Copyright &#169; 2002-2013 John Maddock and Christopher Kormanyos<p>
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