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23 | </div> | |
24 | <div class="section"> | |
25 | <div class="titlepage"><div><div><h3 class="title"> | |
26 | <a name="boost_optional.reference.acknowledgements"></a><a class="link" href="acknowledgements.html" title="Acknowledgements">Acknowledgements</a> | |
27 | </h3></div></div></div> | |
28 | <h5> | |
29 | <a name="boost_optional.reference.acknowledgements.h0"></a> | |
30 | <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 | |
31 | review</a> | |
32 | </h5> | |
33 | <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> | |
34 | <li class="listitem"> | |
35 | Peter Dimov suggested the name 'optional', and was the first to point | |
36 | out the need for aligned storage. | |
37 | </li> | |
38 | <li class="listitem"> | |
39 | Douglas Gregor developed 'type_with_alignment', and later Eric Friedman | |
40 | coded 'aligned_storage', which are the core of the optional class implementation. | |
41 | </li> | |
42 | <li class="listitem"> | |
43 | Andrei Alexandrescu and Brian Parker also worked with aligned storage | |
44 | techniques and their work influenced the current implementation. | |
45 | </li> | |
46 | <li class="listitem"> | |
47 | Gennadiy Rozental made extensive and important comments which shaped | |
48 | the design. | |
49 | </li> | |
50 | <li class="listitem"> | |
51 | Vesa Karvonen and Douglas Gregor made quite useful comparisons between | |
52 | optional, variant and any; and made other relevant comments. | |
53 | </li> | |
54 | <li class="listitem"> | |
55 | Douglas Gregor and Peter Dimov commented on comparisons and evaluation | |
56 | in boolean contexts. | |
57 | </li> | |
58 | <li class="listitem"> | |
59 | Eric Friedman helped understand the issues involved with aligned storage, | |
60 | move/copy operations and exception safety. | |
61 | </li> | |
62 | <li class="listitem"> | |
63 | Many others have participated with useful comments: Aleksey Gurotov, | |
64 | Kevlin Henney, David Abrahams, and others I can't recall. | |
65 | </li> | |
66 | </ul></div> | |
67 | <h5> | |
68 | <a name="boost_optional.reference.acknowledgements.h1"></a> | |
69 | <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 | |
70 | review</a> | |
71 | </h5> | |
72 | <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> | |
73 | <li class="listitem"> | |
74 | William Kempf carefully considered the originally proposed interface | |
75 | and suggested the new interface which is currently used. He also started | |
76 | and fueled the discussion about the analogy optional<>/smart pointer | |
77 | and about relational operators. | |
78 | </li> | |
79 | <li class="listitem"> | |
80 | Peter Dimov, Joel de Guzman, David Abrahams, Tanton Gibbs and Ian Hanson | |
81 | focused on the relational semantics of optional (originally undefined); | |
82 | concluding with the fact that the pointer-like interface doesn't make | |
83 | it a pointer so it shall have deep relational operators. | |
84 | </li> | |
85 | <li class="listitem"> | |
86 | Augustus Saunders also explored the different relational semantics between | |
87 | optional<> and a pointer and developed the OptionalPointee concept | |
88 | as an aid against potential conflicts on generic code. | |
89 | </li> | |
90 | <li class="listitem"> | |
91 | Joel de Guzman noticed that optional<> can be seen as an API on | |
92 | top of variant<T,nil_t>. | |
93 | </li> | |
94 | <li class="listitem"> | |
95 | Dave Gomboc explained the meaning and usage of the Haskell analog to | |
96 | optional<>: the Maybe type constructor (analogy originally pointed | |
97 | out by David Sankel). | |
98 | </li> | |
99 | <li class="listitem"> | |
100 | Other comments were posted by Vincent Finn, Anthony Williams, Ed Brey, | |
101 | Rob Stewart, and others. | |
102 | </li> | |
103 | <li class="listitem"> | |
104 | Joel de Guzman made the case for the support of references and helped | |
105 | with the proper semantics. | |
106 | </li> | |
107 | <li class="listitem"> | |
108 | Mat Marcus shown the virtues of a value-oriented interface, influencing | |
109 | the current design, and contributed the idea of "none". | |
110 | </li> | |
111 | <li class="listitem"> | |
112 | Vladimir Batov's design of Boost.Convert library motivated the development | |
113 | of value accessors for <code class="computeroutput"><span class="identifier">optional</span></code>: | |
114 | 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>. | |
115 | </li> | |
116 | </ul></div> | |
117 | </div> | |
118 | <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> | |
119 | <td align="left"></td> | |
120 | <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2016 Andrzej Krzemieński<p> | |
121 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
122 | 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>) | |
123 | </p> | |
124 | </div></td> | |
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