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+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
+<title>Acknowledgements</title>
+<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
+<link rel="home" href="../../index.html" title="Boost.Optional">
+<link rel="up" href="../../optional/reference.html" title="Reference">
+<link rel="prev" href="relnotes.html" title="Release Notes">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr>
+<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td>
+<td align="center"><a href="../../../../../../index.html">Home</a></td>
+<td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td>
+<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
+<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
+<td align="center"><a href="../../../../../../more/index.htm">More</a></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="relnotes.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../optional/reference.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>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_optional.reference.acknowledgements"></a><a class="link" href="acknowledgements.html" title="Acknowledgements">Acknowledgements</a>
+</h3></div></div></div>
+<h5>
+<a name="boost_optional.reference.acknowledgements.h0"></a>
+        <span class="phrase"><a name="boost_optional.reference.acknowledgements.pre_formal_review"></a></span><a class="link" href="acknowledgements.html#boost_optional.reference.acknowledgements.pre_formal_review">Pre-formal
+        review</a>
+      </h5>
+<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>
+<h5>
+<a name="boost_optional.reference.acknowledgements.h1"></a>
+        <span class="phrase"><a name="boost_optional.reference.acknowledgements.post_formal_review"></a></span><a class="link" href="acknowledgements.html#boost_optional.reference.acknowledgements.post_formal_review">Post-formal
+        review</a>
+      </h5>
+<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>
+<li class="listitem">
+            Vladimir Batov's design of Boost.Convert library motivated the development
+            of value accessors for <code class="computeroutput"><span class="identifier">optional</span></code>:
+            functions <code class="computeroutput"><span class="identifier">value</span></code>, <code class="computeroutput"><span class="identifier">value_or</span></code>, <code class="computeroutput"><span class="identifier">value_or_eval</span></code>.
+          </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; 2014-2016 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>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="relnotes.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../optional/reference.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>
+</div>
+</body>
+</html>