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<title>Preface</title>
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<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
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<link rel="start" href="../index.html" title="Chapter<65>1.<2E>Fusion 2.0">
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<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../boost.png"></td>
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<td align="center"><a href="../../../../../index.htm">Home</a></td>
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<td align="center"><a href="../../../../libraries.htm">Libraries</a></td>
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<td align="center"><a href="../../../../../people/people.htm">People</a></td>
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<td align="center"><a href="../../../../../more/faq.htm">FAQ</a></td>
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<a accesskey="p" href="../index.html"><img src="../images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../images/home.png" alt="Home"></a><a accesskey="n" href="introduction.html"><img src="../images/next.png" alt="Next"></a>
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<div class="section" lang="en">
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="fusion.preface"></a><a href="preface.html" title="Preface">Preface</a></h2></div></div></div>
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<div class="blockquote"><blockquote class="blockquote"><p>
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<span class="emphasis"><em>“<span class="quote">Algorithms + Data Structures = Programs.</span>”</em></span>
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</p></blockquote></div>
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<div class="blockquote"><blockquote class="blockquote"><p>
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<span class="bold"><b>--Niklaus Wirth</b></span>
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</p></blockquote></div>
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<a name="fusion.preface.description"></a><h3>
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<a name="id372639"></a>
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<a href="preface.html#fusion.preface.description">Description</a>
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</h3>
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<p>
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Fusion is a library for working with hetrogenous collections of data, commonly
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referred to as tuples. A set of containers (vector, list, set and map) is provided,
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along with views that provide a transformed presentation of their underlying
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data. Collectively the containers and views are referred to as sequences, and
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Fusion has a suite of algorithms that operate upon the various sequence types,
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using an iterator concept that binds everything together.
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</p>
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<p>
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The architecture is modeled after <a href="http://www.boost.org/libs/mpl/index.html" target="_top">MPL</a>
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which in turn is modeled after <a href="http://en.wikipedia.org/wiki/Standard_Template_Library" target="_top">STL</a>.
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It is named "fusion" because the library is a "fusion"
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of compile time metaprogramming with runtime programming.
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</p>
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<a name="fusion.preface.motivation"></a><h3>
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<a name="id372690"></a>
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<a href="preface.html#fusion.preface.motivation">Motivation</a>
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</h3>
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<p>
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Tuples are powerful beasts. After having developed two significant projects
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(<a href="http://spirit.sourceforge.net" target="_top">Spirit</a> and <a href="http://boost.org/libs/spirit/phoenix/index.html" target="_top">Phoenix</a>)
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that relied heavily metaprogramming, it became apparent that tuples are a powerful
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means to simplify otherwise tricky tasks; especially those that require a combination
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of metaprogramming and manipulation of heterogenous data types with values.
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While <a href="http://www.boost.org/libs/mpl/index.html" target="_top">MPL</a> is
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an extremely powerful metaprogramming tool, <a href="http://www.boost.org/libs/mpl/index.html" target="_top">MPL</a>
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focuses on type manipulation only. Ultimately, you'll have to map these types
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to real values to make them useful in the runtime world where all the real
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action takes place.
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</p>
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<p>
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As <a href="http://spirit.sourceforge.net" target="_top">Spirit</a> and <a href="http://boost.org/libs/spirit/phoenix/index.html" target="_top">Phoenix</a>
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evolved, patterns and idioms related to tuple manipulation emerged. Soon, it
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became clear that those patterns and idioms were best assembled in a tuples
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algorithms library. <a href="http://www.boost.org/people/dave_abrahams.htm" target="_top">David
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Abrahams</a> outlined such a scheme in 2002. At that time, it just so happened
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that <a href="http://spirit.sourceforge.net" target="_top">Spirit</a> and <a href="http://boost.org/libs/spirit/phoenix/index.html" target="_top">Phoenix</a>
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had an adhoc collection of tuple manipulation and traversal routines. It was
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an instant <span class="emphasis"><em>AHA!</em></span> moment.
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</p>
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<a name="fusion.preface.how_to_use_this_manual"></a><h3>
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<a name="id374509"></a>
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<a href="preface.html#fusion.preface.how_to_use_this_manual">How to use this manual</a>
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</h3>
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<p>
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Some icons are used to mark certain topics indicative of their relevance. These
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icons precede some text to indicate:
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</p>
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<div class="informaltable">
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<h4>
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<a name="id374536"></a>
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<span class="table-title">Icons</span>
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</h4>
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<table class="table">
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<thead><tr>
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<th>Icon</th>
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<th>Name</th>
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<th>Meaning</th>
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</tr></thead>
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<tbody>
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<tr>
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<td><span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span></td>
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<td>Note</td>
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<td>Information provided
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is auxiliary but will give the reader a deeper insight into a specific
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topic. May be skipped.</td>
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</tr>
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<tr>
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<td><span class="inlinemediaobject"><img src="../images/alert.png" alt="alert"></span></td>
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<td>Alert</td>
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<td>Information provided
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is of utmost importance.</td>
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</tr>
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<tr>
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<td><span class="inlinemediaobject"><img src="../images/caution.png" alt="caution"></span></td>
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<td>Caution</td>
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<td>A mild warning.</td>
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</tr>
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<tr>
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<td><span class="inlinemediaobject"><img src="../images/tip.png" alt="tip"></span></td>
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<td>Tip</td>
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<td>A potentially useful
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and helpful piece of information.</td>
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</tr>
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</tbody>
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</table>
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</div>
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<p>
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This documentation is automatically generated by Boost QuickBook documentation
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tool. QuickBook can be found in the <a href="http://www.boost.org/tools/index.html" target="_top">Boost
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Tools</a>.
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</p>
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<a name="fusion.preface.support"></a><h3>
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<a name="id373159"></a>
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<a href="preface.html#fusion.preface.support">Support</a>
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</h3>
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<p>
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Please direct all questions to Spirit's mailing list. You can subscribe to
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the <a href="https://lists.sourceforge.net/lists/listinfo/spirit-general" target="_top">Spirit
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Mailing List</a>. The mailing list has a searchable archive. A search link
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to this archive is provided in <a href="http://spirit.sourceforge.net" target="_top">Spirit</a>'s
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home page. You may also read and post messages to the mailing list through
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<a href="news://news.gmane.org/gmane.comp.spirit.general" target="_top">Spirit General
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NNTP news portal</a> (thanks to <a href="http://www.gmane.org" target="_top">Gmane</a>).
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The news group mirrors the mailing list. Here is a link to the archives: <a href="http://news.gmane.org/gmane.comp.parsers.spirit.general" target="_top">http://news.gmane.org/gmane.comp.parsers.spirit.general</a>.
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</p>
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</div>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"></td>
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<td align="right"><small>Copyright <20> 2001-2005 Joel de Guzman, Dan Marsden</small></td>
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</tr></table>
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<hr>
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<div class="spirit-nav">
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<a accesskey="p" href="../index.html"><img src="../images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../images/home.png" alt="Home"></a><a accesskey="n" href="introduction.html"><img src="../images/next.png" alt="Next"></a>
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