boost-react-native-bundle

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<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>Overview</title> <link rel="stylesheet" href="../math.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> <link rel="home" href="../index.html" title="Math Toolkit 2.1.0"> <link rel="up" href="../cstdfloat.html" title="Chapter 3. Specified-width floating-point typedefs"> <link rel="prev" href="../cstdfloat.html" title="Chapter 3. Specified-width floating-point typedefs"> <link rel="next" href="rationale.html" title="Rationale"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table cellpadding="2" width="100%"><tr> <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../boost.png"></td> <td align="center"><a href="../../../../../index.html">Home</a></td> <td align="center"><a href="../../../../../libs/libraries.htm">Libraries</a></td> <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> <td align="center"><a href="../../../../../more/index.htm">More</a></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="../cstdfloat.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../cstdfloat.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="rationale.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> </div> <div class="section"> <div class="titlepage"><div><div><h2 class="title" style="clear: both"> <a name="math_toolkit.overview"></a><a class="link" href="overview.html" title="Overview">Overview</a> </h2></div></div></div> The header <code class="computeroutput"><boost/cstdfloat.hpp></code> provides optional standardized floating-point <code class="computeroutput">typedef</code>s having specified widths. These are useful for writing portable code because they should behave identically on all platforms. These <code class="computeroutput">typedef</code>s are the floating-point analog of specified-width integers in <code class="computeroutput"><cstdint></code> and <code class="computeroutput">stdint.h</code>. The <code class="computeroutput">typedef</code>s are based on <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3626.pdf" target="_top">N3626</a> proposed for a new C++14 standard header <code class="computeroutput"><cstdfloat></code> and <a href="http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1703.pdf" target="_top">N1703</a> proposed for a new C language standard header <code class="computeroutput"><stdfloat.h></code>. All <code class="computeroutput">typedef</code>s are in <code class="computeroutput">namespace boost</code> (would be in namespace <code class="computeroutput">std</code> if eventually standardized). The <code class="computeroutput">typedef</code>s include <code class="computeroutput">float16_t, float32_t, float64_t, float80_t, float128_t</code>, their corresponding least and fast types, and the corresponding maximum-width type. The <code class="computeroutput">typedef</code>s are based on underlying built-in types such as <code class="computeroutput">float</code>, <code class="computeroutput">double</code>, or <code class="computeroutput">long double</code>, or based on other compiler-specific non-standardized types such as <code class="computeroutput">__float128</code>. The underlying types of these <code class="computeroutput">typedef</code>s must conform with the corresponding specifications of binary16, binary32, binary64, and binary128 in <a href="http://en.wikipedia.org/wiki/IEEE_floating_point" target="_top">IEEE_floating_point</a> floating-point format. The 128-bit floating-point type (of great interest in scientific and numeric programming) is not required in the Boost header, and may not be supplied for all platforms/compilers, because compiler support for a 128-bit floating-point type is not mandated by either the C standard or the C++ standard. See <a class="link" href="examples.html#math_toolkit.examples.je_lambda">Jahnke-Emden-Lambda function example</a> for an example using both a CMath function and a Boost.Math function to evaluate a moderately interesting function, the <a href="http://mathworld.wolfram.com/LambdaFunction.html" target="_top">Jahnke-Emden-Lambda function</a> and <a class="link" href="examples.html#math_toolkit.examples.normal_table">normal distribution</a> an example of a statistical distribution from Boost.Math </div> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <td align="left"></td> <td align="right"><div class="copyright-footer">Copyright © 2006-2010, 2012-2014 Nikhar Agrawal, Anton Bikineev, Paul A. Bristow, Marco Guazzone, Christopher Kormanyos, Hubert Holin, Bruno Lalande, John Maddock, Johan Råde, Gautam Sewani, Benjamin Sobotta, Thijs van den Berg, Daryle Walker and Xiaogang Zhang 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>) </div></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="../cstdfloat.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../cstdfloat.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="rationale.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>