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4<!-- Copyright Aleksey Gurtovoy 2006. Distributed under the Boost -->
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9<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
10<title>The MPL Reference Manual: greater</title>
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13<body class="docframe refmanual">
14<table class="header"><tr class="header"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./less-equal.html" class="navigation-link">Prev</a>&nbsp;<a href="./greater-equal.html" class="navigation-link">Next</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./less-equal.html" class="navigation-link">Back</a>&nbsp;<a href="./greater-equal.html" class="navigation-link">Along</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./comparisons.html" class="navigation-link">Up</a>&nbsp;<a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td>
15<td class="header-group page-location"><a href="../refmanual.html" class="navigation-link">Front Page</a> / <a href="./metafunctions.html" class="navigation-link">Metafunctions</a> / <a href="./comparisons.html" class="navigation-link">Comparisons</a> / <a href="./greater.html" class="navigation-link">greater</a></td>
16</tr></table><div class="header-separator"></div>
17<div class="section" id="greater">
18<h1><a class="toc-backref" href="./comparisons.html#id471" name="greater">greater</a></h1>
19<div class="section" id="greater-synopsis">
20<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
21<pre class="literal-block">
22template&lt;
23      typename T1
24    , typename T2
25    &gt;
26struct <a href="./greater.html" class="identifier">greater</a>
27{
28    typedef <em>unspecified</em> type;
29};
30</pre>
31</div>
32<div class="section" id="greater-description">
33<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
34<p>Returns a true-valued <a class="reference" href="./integral-constant.html">Integral Constant</a> if <tt class="literal"><span class="pre">T1</span></tt> is greater than <tt class="literal"><span class="pre">T2</span></tt>.</p>
35</div>
36<div class="section" id="greater-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/greater.hpp" class="header">boost/mpl/greater.hpp</a>&gt;
40#include &lt;<a href="../../../../boost/mpl/comparison.hpp" class="header">boost/mpl/comparison.hpp</a>&gt;
41</pre>
42</div>
43<div class="section" id="greater-model-of">
44<h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
45<p><a class="reference" href="./numeric-metafunction.html">Numeric Metafunction</a></p>
46</div>
47<div class="section" id="greater-parameters">
48<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
49<table border="1" class="table">
50<colgroup>
51<col width="17%" />
52<col width="30%" />
53<col width="53%" />
54</colgroup>
55<thead valign="bottom">
56<tr><th>Parameter</th>
57<th>Requirement</th>
58<th>Description</th>
59</tr>
60</thead>
61<tbody valign="top">
62<tr><td><tt class="literal"><span class="pre">T1</span></tt>, <tt class="literal"><span class="pre">T2</span></tt></td>
63<td><a class="reference" href="./integral-constant.html">Integral Constant</a></td>
64<td>Operation's arguments.</td>
65</tr>
66</tbody>
67</table>
68<p>[<em>Note:</em> The requirements listed in this specification
69are the ones imposed by the default implementation. See <a class="reference" href="./numeric-metafunction.html">Numeric Metafunction</a> concept
70for the details on how to provide an implementation for a user-defined numeric type
71that does not satisfy the <a class="reference" href="./integral-constant.html">Integral Constant</a> requirements. — <em>end note</em>]</p>
72</div>
73<div class="section" id="greater-expression-semantics">
74<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
75<p>For any <a class="reference" href="./integral-constant.html">Integral Constant</a>s <tt class="literal"><span class="pre">c1</span></tt> and <tt class="literal"><span class="pre">c2</span></tt>:</p>
76<pre class="literal-block">
77typedef <a href="./greater.html" class="identifier">greater</a>&lt;c1,c2&gt;::type r;
78</pre>
79<table class="field-list" frame="void" rules="none">
80<col class="field-name" />
81<col class="field-body" />
82<tbody valign="top">
83<tr class="field"><th class="field-name">Return type:</th><td class="field-body"><a class="reference" href="./integral-constant.html">Integral Constant</a>.</td>
84</tr>
85<tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p>
86<pre class="last literal-block">
87typedef <a href="./bool.html" class="identifier">bool_</a>&lt; (c1::value &lt; c2::value) &gt; r;
88</pre>
89</td>
90</tr>
91</tbody>
92</table>
93<!-- .......................................................................... -->
94<pre class="literal-block">
95typedef <a href="./greater.html" class="identifier">greater</a>&lt;c1,c2&gt; r;
96</pre>
97<table class="field-list" frame="void" rules="none">
98<col class="field-name" />
99<col class="field-body" />
100<tbody valign="top">
101<tr class="field"><th class="field-name">Return type:</th><td class="field-body"><a class="reference" href="./integral-constant.html">Integral Constant</a>.</td>
102</tr>
103<tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p>
104<pre class="last literal-block">
105struct r : <a href="./greater.html" class="identifier">greater</a>&lt;c1,c2&gt;::type {};
106</pre>
107</td>
108</tr>
109</tbody>
110</table>
111</div>
112<div class="section" id="greater-complexity">
113<h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3>
114<p>Amortized constant time.</p>
115</div>
116<div class="section" id="greater-example">
117<h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
118<pre class="literal-block">
119<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( <a href="./greater.html" class="identifier">greater</a>&lt; <a href="./int.html" class="identifier">int_</a>&lt;10&gt;, <a href="./int.html" class="identifier">int_</a>&lt;0&gt; &gt; ));
120<a href="./assert-not.html" class="identifier">BOOST_MPL_ASSERT_NOT</a>(( <a href="./greater.html" class="identifier">greater</a>&lt; <a href="./long.html" class="identifier">long_</a>&lt;0&gt;, <a href="./int.html" class="identifier">int_</a>&lt;10&gt; &gt; ));
121<a href="./assert-not.html" class="identifier">BOOST_MPL_ASSERT_NOT</a>(( <a href="./greater.html" class="identifier">greater</a>&lt; <a href="./long.html" class="identifier">long_</a>&lt;10&gt;, <a href="./int.html" class="identifier">int_</a>&lt;10&gt; > ));
122</pre>
123</div>
124<div class="section" id="greater-see-also">
125<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
126<p><a class="reference" href="./comparisons.html">Comparisons</a>, <a class="reference" href="./numeric-metafunction.html">Numeric Metafunction</a>, <a class="refentry reference" href="./numeric-cast.html"><tt class="refentry literal"><span class="pre">numeric_cast</span></tt></a>, <a class="refentry reference" href="./greater-equal.html"><tt class="refentry literal"><span class="pre">greater_equal</span></tt></a>, <a class="refentry reference" href="./less.html"><tt class="refentry literal"><span class="pre">less</span></tt></a>, <a class="refentry reference" href="./equal-to.html"><tt class="refentry literal"><span class="pre">equal_to</span></tt></a></p>
127<!-- modtime: November 10, 2004 04:40:49 +0000 -->
128<!-- Metafunctions/Comparisons//greater_equal |40 -->
129</div>
130</div>
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