1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<html> 3<head> 4<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 5<title>History</title> 6<link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css"> 7<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 8<link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> 9<link rel="up" href="../conversion.html" title="Chapter 11. The Conversion Library 1.7"> 10<link rel="prev" href="synopsis.html" title="Synopsis"> 11<link rel="next" href="../crc.html" title="Chapter 12. Boost.CRC 1.5"> 12</head> 13<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 14<table cellpadding="2" width="100%"><tr> 15<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../boost.png"></td> 16<td align="center"><a href="../../../index.html">Home</a></td> 17<td align="center"><a href="../../../libs/libraries.htm">Libraries</a></td> 18<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 19<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 20<td align="center"><a href="../../../more/index.htm">More</a></td> 21</tr></table> 22<hr> 23<div class="spirit-nav"> 24<a accesskey="p" href="synopsis.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../conversion.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="../crc.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> 25</div> 26<div class="section"> 27<div class="titlepage"><div><div><h2 class="title" style="clear: both"> 28<a name="conversion.history"></a><a class="link" href="history.html" title="History">History</a> 29</h2></div></div></div> 30<p> 31 <code class="computeroutput"><span class="identifier">polymorphic_cast</span></code> was suggested 32 by Bjarne Stroustrup in "The C++ Programming Language". 33 </p> 34<p> 35 <code class="computeroutput"><span class="identifier">polymorphic_downcast</span></code> was contributed 36 by <a href="http://www.boost.org/people/dave_abrahams.htm" target="_top">Dave Abrahams</a>. 37 </p> 38<p> 39 <code class="computeroutput"><span class="identifier">polymorphic_pointer_downcast</span></code> 40 was contributed by <a href="http://www.boost.org/people/boris_rasin.htm" target="_top">Boris 41 Rasin</a> and <code class="computeroutput"><span class="identifier">polymorphic_pointer_cast</span></code> 42 by Antony Polukhin. 43 </p> 44<p> 45 <code class="computeroutput"><span class="identifier">polymorphic_downcast</span></code> overload 46 for references was contributed by Julien Delacroix. 47 </p> 48<p> 49 An old <code class="computeroutput"><span class="identifier">numeric_cast</span></code> that was 50 contributed by <a href="http://www.boost.org/people/kevlin_henney.htm" target="_top">Kevlin 51 Henney</a> is now superseded by the <a href="../../../numeric_conversion/doc/html/html/boost_numericconversion/improved_numeric_cast__.html" target="_top">Boost 52 Numeric Conversion Library</a> 53 </p> 54</div> 55<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 56<td align="left"></td> 57<td align="right"><div class="copyright-footer">Copyright © 2001 Beman Dawes<br>Copyright © 2014-2020 Antony Polukhin<p> 58 Distributed under the Boost Software License, Version 1.0. (See accompanying 59 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>) 60 </p> 61</div></td> 62</tr></table> 63<hr> 64<div class="spirit-nav"> 65<a accesskey="p" href="synopsis.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../conversion.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="../crc.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> 66</div> 67</body> 68</html> 69
