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<title>Preface</title>
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<meta name="generator" content="DocBook XSL Stylesheets V1.68.1">
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<link rel="start" href="../index.html" title="Chapter<65>1.<2E>Fusion 2.0">
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<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>
</p>
<p>
<span class="emphasis"><em>&#8220;<span class="quote">Algorithms + Data Structures = Programs.</span>&#8221;</em></span>
</p>
<p>
</p>
</blockquote></div>
<div class="blockquote"><blockquote class="blockquote">
<p>
</p>
<p>
<span class="bold"><strong>--Niklaus Wirth</strong></span>
</p>
<p>
</p>
</blockquote></div>
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<a name="fusion.preface.description"></a><h3>
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<a href="preface.html#fusion.preface.description">Description</a>
</h3>
<p>
Doc Tweaks [SVN r35130]
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Fusion is a library for working with heterogenous collections of data, commonly
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referred to as tuples. A set of containers (vector, list, set and map) is provided,
along with views that provide a transformed presentation of their underlying
data. Collectively the containers and views are referred to as sequences, and
Fusion has a suite of algorithms that operate upon the various sequence types,
using an iterator concept that binds everything together.
</p>
<p>
The architecture is modeled after <a href="http://www.boost.org/libs/mpl/index.html" target="_top">MPL</a>
which in turn is modeled after <a href="http://en.wikipedia.org/wiki/Standard_Template_Library" target="_top">STL</a>.
It is named "fusion" because the library is a "fusion"
of compile time metaprogramming with runtime programming.
</p>
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<a href="preface.html#fusion.preface.motivation">Motivation</a>
</h3>
<p>
Tuples are powerful beasts. After having developed two significant projects
(<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>)
that relied heavily metaprogramming, it became apparent that tuples are a powerful
means to simplify otherwise tricky tasks; especially those that require a combination
of metaprogramming and manipulation of heterogenous data types with values.
While <a href="http://www.boost.org/libs/mpl/index.html" target="_top">MPL</a> is
an extremely powerful metaprogramming tool, <a href="http://www.boost.org/libs/mpl/index.html" target="_top">MPL</a>
focuses on type manipulation only. Ultimately, you'll have to map these types
to real values to make them useful in the runtime world where all the real
action takes place.
</p>
<p>
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>
evolved, patterns and idioms related to tuple manipulation emerged. Soon, it
became clear that those patterns and idioms were best assembled in a tuples
algorithms library. <a href="http://www.boost.org/people/dave_abrahams.htm" target="_top">David
Abrahams</a> outlined such a scheme in 2002. At that time, it just so happened
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>
had an adhoc collection of tuple manipulation and traversal routines. It was
an instant <span class="emphasis"><em>AHA!</em></span> moment.
</p>
<a name="fusion.preface.how_to_use_this_manual"></a><h3>
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<a href="preface.html#fusion.preface.how_to_use_this_manual">How to use this manual</a>
</h3>
<p>
Some icons are used to mark certain topics indicative of their relevance. These
icons precede some text to indicate:
</p>
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<div class="table">
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<a name="id905317"></a><p class="title"><b>Table<EFBFBD>1.1.<2E>Icons</b></p>
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<table class="table" summary="Icons">
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<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
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<th>
<p>
Icon
</p>
</th>
<th>
<p>
Name
</p>
</th>
<th>
<p>
Meaning
</p>
</th>
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</tr></thead>
<tbody>
<tr>
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<td>
<p>
<span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span>
</p>
</td>
<td>
<p>
Note
</p>
</td>
<td>
<p>
Information provided is auxiliary but will give the reader a deeper insight
into a specific topic. May be skipped.
</p>
</td>
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</tr>
<tr>
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<td>
<p>
<span class="inlinemediaobject"><img src="../images/alert.png" alt="alert"></span>
</p>
</td>
<td>
<p>
Alert
</p>
</td>
<td>
<p>
Information provided is of utmost importance.
</p>
</td>
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</tr>
<tr>
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<td>
<p>
<span class="inlinemediaobject"><img src="../images/caution.png" alt="caution"></span>
</p>
</td>
<td>
<p>
Caution
</p>
</td>
<td>
<p>
A mild warning.
</p>
</td>
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</tr>
<tr>
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<td>
<p>
<span class="inlinemediaobject"><img src="../images/tip.png" alt="tip"></span>
</p>
</td>
<td>
<p>
Tip
</p>
</td>
<td>
<p>
A potentially useful and helpful piece of information.
</p>
</td>
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</tr>
</tbody>
</table>
</div>
<p>
This documentation is automatically generated by Boost QuickBook documentation
tool. QuickBook can be found in the <a href="http://www.boost.org/tools/index.html" target="_top">Boost
Tools</a>.
</p>
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<a href="preface.html#fusion.preface.support">Support</a>
</h3>
<p>
Please direct all questions to Spirit's mailing list. You can subscribe to
the <a href="https://lists.sourceforge.net/lists/listinfo/spirit-general" target="_top">Spirit
Mailing List</a>. The mailing list has a searchable archive. A search link
to this archive is provided in <a href="http://spirit.sourceforge.net" target="_top">Spirit</a>'s
home page. You may also read and post messages to the mailing list through
<a href="news://news.gmane.org/gmane.comp.spirit.general" target="_top">Spirit General
NNTP news portal</a> (thanks to <a href="http://www.gmane.org" target="_top">Gmane</a>).
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>.
</p>
</div>
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<td align="left"></td>
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<td align="right"><small>Copyright <20> 2001-2007 Joel de Guzman, Dan Marsden, Tobias
Schwinger</small></td>
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