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1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> 4<title>Introduction</title> 5<link rel="stylesheet" href="../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.76.1"> 7<link rel="home" href="../index.html" title="Chapter 1. Phoenix 3.0"> 8<link rel="up" href="../index.html" title="Chapter 1. Phoenix 3.0"> 9<link rel="prev" href="what_s_new/phoenix_3_0.html" title="Phoenix 3.0"> 10<link rel="next" href="starter_kit.html" title="Starter Kit"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="what_s_new/phoenix_3_0.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.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="starter_kit.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h2 class="title" style="clear: both"> 27<a name="phoenix.introduction"></a><a class="link" href="introduction.html" title="Introduction">Introduction</a> 28</h2></div></div></div> 29<p> 30 <span class="inlinemediaobject"><img src="../images/banner.png" alt="banner"></span> 31 </p> 32<p> 33 The Phoenix library enables FP techniques such as higher order functions, 34 <span class="emphasis"><em>lambda</em></span> (unnamed functions), <span class="emphasis"><em>currying</em></span> 35 (partial function application) and lazy evaluation in C++. The focus is more 36 on usefulness and practicality than purity, elegance and strict adherence to 37 FP principles. 38 </p> 39<p> 40 FP is a programming discipline that is not at all tied to a specific language. 41 FP as a programming discipline can, in fact, be applied to many programming 42 languages. In the realm of C++ for instance, we are seeing more FP techniques 43 being applied. C++ is sufficiently rich to support at least some of the most 44 important facets of FP. C++ is a multiparadigm programming language. It is 45 not only procedural. It is not only object oriented. Beneath the core of the 46 standard C++ library, a closer look into STL gives us a glimpse of FP already 47 in place. It is obvious that the authors of STL know and practice FP. In the 48 near future, we shall surely see more FP trickle down into the mainstream. 49 </p> 50<p> 51 The truth is, most of the FP techniques can coexist quite well with the standard 52 object oriented and imperative programming paradigms. When we are using STL 53 algorithms and functors (function objects) for example, we are already doing 54 FP. Phoenix is an evolutionary next step. 55 </p> 56</div> 57<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 58<td align="left"></td> 59<td align="right"><div class="copyright-footer">Copyright © 2002-2005, 2010 Joel de Guzman, Dan Marsden, Thomas Heller<p> 60 Distributed under the Boost Software License, Version 1.0. (See accompanying 61 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>) 62 </p> 63</div></td> 64</tr></table> 65<hr> 66<div class="spirit-nav"> 67<a accesskey="p" href="what_s_new/phoenix_3_0.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.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="starter_kit.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> 68</div> 69</body> 70</html>