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<title>Acknowledgments</title>
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="boost_optional.acknowledgments"></a><a class="link" href="acknowledgments.html" title="Acknowledgments">Acknowledgments</a>
</h2></div></div></div>
<h4>
<a name="boost_optional.acknowledgments.h0"></a>
      <span class="phrase"><a name="boost_optional.acknowledgments.pre_formal_review"></a></span><a class="link" href="acknowledgments.html#boost_optional.acknowledgments.pre_formal_review">Pre-formal
      review</a>
    </h4>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
          Peter Dimov suggested the name 'optional', and was the first to point out
          the need for aligned storage.
        </li>
<li class="listitem">
          Douglas Gregor developed 'type_with_alignment', and later Eric Friedman
          coded 'aligned_storage', which are the core of the optional class implementation.
        </li>
<li class="listitem">
          Andrei Alexandrescu and Brian Parker also worked with aligned storage techniques
          and their work influenced the current implementation.
        </li>
<li class="listitem">
          Gennadiy Rozental made extensive and important comments which shaped the
          design.
        </li>
<li class="listitem">
          Vesa Karvonen and Douglas Gregor made quite useful comparisons between
          optional, variant and any; and made other relevant comments.
        </li>
<li class="listitem">
          Douglas Gregor and Peter Dimov commented on comparisons and evaluation
          in boolean contexts.
        </li>
<li class="listitem">
          Eric Friedman helped understand the issues involved with aligned storage,
          move/copy operations and exception safety.
        </li>
<li class="listitem">
          Many others have participated with useful comments: Aleksey Gurotov, Kevlin
          Henney, David Abrahams, and others I can't recall.
        </li>
</ul></div>
<h4>
<a name="boost_optional.acknowledgments.h1"></a>
      <span class="phrase"><a name="boost_optional.acknowledgments.post_formal_review"></a></span><a class="link" href="acknowledgments.html#boost_optional.acknowledgments.post_formal_review">Post-formal
      review</a>
    </h4>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
          William Kempf carefully considered the originally proposed interface and
          suggested the new interface which is currently used. He also started and
          fueled the discussion about the analogy optional&lt;&gt;/smart pointer
          and about relational operators.
        </li>
<li class="listitem">
          Peter Dimov, Joel de Guzman, David Abrahams, Tanton Gibbs and Ian Hanson
          focused on the relational semantics of optional (originally undefined);
          concluding with the fact that the pointer-like interface doesn't make it
          a pointer so it shall have deep relational operators.
        </li>
<li class="listitem">
          Augustus Saunders also explored the different relational semantics between
          optional&lt;&gt; and a pointer and developed the OptionalPointee concept
          as an aid against potential conflicts on generic code.
        </li>
<li class="listitem">
          Joel de Guzman noticed that optional&lt;&gt; can be seen as an API on top
          of variant&lt;T,nil_t&gt;.
        </li>
<li class="listitem">
          Dave Gomboc explained the meaning and usage of the Haskell analog to optional&lt;&gt;:
          the Maybe type constructor (analogy originally pointed out by David Sankel).
        </li>
<li class="listitem">
          Other comments were posted by Vincent Finn, Anthony Williams, Ed Brey,
          Rob Stewart, and others.
        </li>
<li class="listitem">
          Joel de Guzman made the case for the support of references and helped with
          the proper semantics.
        </li>
<li class="listitem">
          Mat Marcus shown the virtues of a value-oriented interface, influencing
          the current design, and contributed the idea of "none".
        </li>
</ul></div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014 Andrzej Krzemie&#324;ski<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        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>)
      </p>
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