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75 lines
4.5 KiB
HTML
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<link rel="home" href="../index.html" title="Chapter 1. Boost.Iterator">
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<link rel="prev" href="upgrading.html" title="Upgrading from the old Boost Iterator Adaptor Library">
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<a accesskey="p" href="upgrading.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>
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<div class="section">
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="iterator.history"></a><a class="link" href="history.html" title="History">History</a>
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</h2></div></div></div>
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<p>
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In 2000 Dave Abrahams was writing an iterator for a container of pointers,
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which would access the pointed-to elements when dereferenced. Naturally, being
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a library writer, he decided to generalize the idea and the Boost Iterator
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Adaptor library was born. Dave was inspired by some writings of Andrei Alexandrescu
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and chose a policy based design (though he probably didn't capture Andrei's
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idea very well - there was only one policy class for all the iterator's orthogonal
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properties). Soon Jeremy Siek realized he would need the library and they worked
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together to produce a "Boostified" version, which was reviewed and
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accepted into the library. They wrote a paper and made several important revisions
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of the code.
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</p>
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<p>
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Eventually, several shortcomings of the older library began to make the need
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for a rewrite apparent. Dave and Jeremy started working at the Santa Cruz C++
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committee meeting in 2002, and had quickly generated a working prototype. At
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the urging of Mat Marcus, they decided to use the GenVoca/CRTP pattern approach,
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and moved the policies into the iterator class itself. Thomas Witt expressed
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interest and became the voice of strict compile-time checking for the project,
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adding uses of the SFINAE technique to eliminate false converting constructors
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and operators from the overload set. He also recognized the need for a separate
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<code class="computeroutput"><span class="identifier">iterator_facade</span></code>, and factored
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it out of <code class="computeroutput"><span class="identifier">iterator_adaptor</span></code>.
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Finally, after a near-complete rewrite of the prototype, they came up with
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the library you see today.
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</p>
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<div class="blockquote"><blockquote class="blockquote"><p>
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[Coplien, 1995] Coplien, J., Curiously Recurring Template Patterns, C++ Report,
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February 1995, pp. 24-27.
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</p></blockquote></div>
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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"><div class="copyright-footer">Copyright © 2003, 2005 David Abrahams Jeremy Siek Thomas
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Witt<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at <ulink url="http://www.boost.org/LICENSE_1_0.txt">
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http://www.boost.org/LICENSE_1_0.txt </ulink>)
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</p>
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