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14<div class="section" id="bool">
15<h1><a class="toc-backref" href="./numeric.html#id500" name="bool">bool_</a></h1>
16<div class="section" id="bool-synopsis">
17<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
18<pre class="literal-block">
19template&lt;
20      bool C
21    &gt;
22struct <a href="./bool.html" class="identifier">bool_</a>
23{
24    // <em>unspecified</em>
25    // ...
26};
27
28typedef <a href="./bool.html" class="identifier">bool_</a>&lt;true&gt;  true_;
29typedef <a href="./bool.html" class="identifier">bool_</a>&lt;false&gt; false_;
30</pre>
31</div>
32<div class="section" id="bool-description">
33<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
34<p>A boolean <a class="reference" href="./integral-constant.html">Integral Constant</a> wrapper.</p>
35</div>
36<div class="section" id="bool-header">
37<h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
38<pre class="literal-block">
39#include &lt;<a href="../../../../boost/mpl/bool.hpp" class="header">boost/mpl/bool.hpp</a>&gt;
40</pre>
41</div>
42<div class="section" id="bool-model-of">
43<h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
44<p><a class="reference" href="./integral-constant.html">Integral Constant</a></p>
45</div>
46<div class="section" id="bool-parameters">
47<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
48<table border="1" class="table">
49<colgroup>
50<col width="21%" />
51<col width="42%" />
52<col width="37%" />
53</colgroup>
54<thead valign="bottom">
55<tr><th>Parameter</th>
56<th>Requirement</th>
57<th>Description</th>
58</tr>
59</thead>
60<tbody valign="top">
61<tr><td><tt class="literal"><span class="pre">C</span></tt></td>
62<td>A boolean integral constant</td>
63<td>A value to wrap.</td>
64</tr>
65</tbody>
66</table>
67</div>
68<div class="section" id="bool-expression-semantics">
69<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
70<p>The semantics of an expression are defined only
71where they differ from, or are not defined in <a class="reference" href="./integral-constant.html">Integral Constant</a>.</p>
72<p>For arbitrary integral constant <tt class="literal"><span class="pre">c</span></tt>:</p>
73<table border="1" class="table">
74<colgroup>
75<col width="24%" />
76<col width="76%" />
77</colgroup>
78<thead valign="bottom">
79<tr><th>Expression</th>
80<th>Semantics</th>
81</tr>
82</thead>
83<tbody valign="top">
84<tr><td><tt class="literal"><span class="pre"><a href="./bool.html" class="identifier">bool_</a>&lt;c&gt;</span></tt></td>
85<td>An <a class="reference" href="./integral-constant.html">Integral Constant</a> <tt class="literal"><span class="pre">x</span></tt> such that <tt class="literal"><span class="pre">x::value</span> <span class="pre">==</span> <span class="pre">c</span></tt>
86and <tt class="literal"><span class="pre">x::<a href="./value-type.html" class="identifier">value_type</a></span></tt> is identical to <tt class="literal"><span class="pre">bool</span></tt>.</td>
87</tr>
88</tbody>
89</table>
90</div>
91<div class="section" id="bool-example">
92<h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
93<pre class="literal-block">
94<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same&lt; <a href="./bool.html" class="identifier">bool_</a>&lt;true&gt;::<a href="./value-type.html" class="identifier">value_type</a>, bool &gt; ));
95<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same&lt; <a href="./bool.html" class="identifier">bool_</a>&lt;true&gt;, <a class="reference" href="./bool.html"><tt class="literal"><span class="pre">true_</span></tt></a> &gt; )); }
96<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same&lt; <a href="./bool.html" class="identifier">bool_</a>&lt;true&gt;::type, <a href="./bool.html" class="identifier">bool_</a>&lt;true&gt; &gt; ));
97<a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( <a href="./bool.html" class="identifier">bool_</a>&lt;true&gt;::value, ==, true );
98assert( <a href="./bool.html" class="identifier">bool_</a>&lt;true&gt;() == true );
99</pre>
100</div>
101<div class="section" id="bool-see-also">
102<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
103<p><a class="reference" href="./data-types.html">Data Types</a>, <a class="reference" href="./integral-constant.html">Integral Constant</a>, <a class="refentry reference" href="./int.html"><tt class="refentry literal"><span class="pre">int_</span></tt></a>, <a class="refentry reference" href="./long.html"><tt class="refentry literal"><span class="pre">long_</span></tt></a>, <a class="refentry reference" href="./integral-c.html"><tt class="refentry literal"><span class="pre">integral_c</span></tt></a></p>
104<!-- modtime: November 10, 2004 04:44:19 +0000 -->
105<!-- Data Types/Numeric//int_ |20 -->
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