1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Numeric Limits</title> 5<link rel="stylesheet" href="../../multiprecision.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../index.html" title="Chapter 1. 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class="special"><></span></code> functions</a></span></dt> 33<dt><span class="section"><a href="limits/limits32.html">Numeric limits 34 for 32-bit platform</a></span></dt> 35<dt><span class="section"><a href="limits/how_to_tell.html">How to 36 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> 37</dl></div> 38<p> 39 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> 40 for all types as far as possible and meaningful because experience with Boost.Math 41 has shown that this aids portability. 42 </p> 43<p> 44 The <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3690.pdf" target="_top">C++ 45 standard library</a> defines <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">numeric_limits</span></code> 46 in section 18.3.2. 47 </p> 48<p> 49 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 50 N507 DRAFT INTERNATIONAL ISO/IEC STANDARD WD 10967-1</a> Information 51 technology Language independent arithmetic Part 1: Integer and floating-point 52 arithmetic. 53 </p> 54<p> 55 That C Standard in turn refers to 56 </p> 57<p> 58 <a href="https://doi.org/10.1109/IEEESTD.1985.82928" target="_top">IEEE754 IEEE Standard 59 for Binary Floating-Point Arithmetic</a> 60 </p> 61<p> 62 There is a useful summary of <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">numeric_limits</span></code> 63 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> 74<div class="warning"><table border="0" summary="Warning"> 75<tr> 76<td rowspan="2" align="center" valign="top" width="25"><img alt="[Warning]" src="../../../../../../doc/src/images/warning.png"></td> 77<th align="left">Warning</th> 78</tr> 79<tr><td align="left" valign="top"><p> 80 GMP's extendable floatin-point <code class="computeroutput"><span class="identifier">mpf_t</span></code> 81 does not have a concept of overflow: operations that lead to overflow eventually 82 run of out of resources and terminate with stack overflow (often after 83 several seconds). 84 </p></td></tr> 85</table></div> 86</div> 87<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 88<td align="left"></td> 89<td align="right"><div class="copyright-footer">Copyright © 2002-2020 John 90 Maddock and Christopher Kormanyos<p> 91 Distributed under the Boost Software License, Version 1.0. (See accompanying 92 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>) 93 </p> 94</div></td> 95</tr></table> 96<hr> 97<div class="spirit-nav"> 98<a accesskey="p" href="serial.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../tut.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="limits/constants.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 99</div> 100</body> 101</html> 102
