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14 <div class=
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"less">
15 <h1><a class=
"toc-backref" href=
"./comparisons.html#id1543">less
</a></h1>
16 <div class=
"section" id=
"id1014">
17 <h3><a class=
"subsection-title" href=
"#synopsis" name=
"synopsis">Synopsis
</a></h3>
18 <pre class=
"literal-block">
23 struct
<a href=
"./less.html" class=
"identifier">less
</a>
25 typedef
<em>unspecified
</em> type;
29 <div class=
"section" id=
"id1015">
30 <h3><a class=
"subsection-title" href=
"#description" name=
"description">Description
</a></h3>
31 <p>Returns a true-valued
<a class=
"reference internal" href=
"./integral-constant.html">Integral Constant
</a> if
<tt class=
"literal"><span class=
"pre">T1
</span></tt> is less than
<tt class=
"literal"><span class=
"pre">T2
</span></tt>.
</p>
33 <div class=
"section" id=
"id1016">
34 <h3><a class=
"subsection-title" href=
"#header" name=
"header">Header
</a></h3>
35 <pre class=
"literal-block">
36 #include
<<a href=
"../../../../boost/mpl/less.hpp" class=
"header">boost/mpl/less.hpp
</a>>
37 #include
<<a href=
"../../../../boost/mpl/comparison.hpp" class=
"header">boost/mpl/comparison.hpp
</a>>
40 <div class=
"section" id=
"id1017">
41 <h3><a class=
"subsection-title" href=
"#model-of" name=
"model-of">Model of
</a></h3>
42 <p><a class=
"reference internal" href=
"./numeric-metafunction.html">Numeric Metafunction
</a></p>
44 <div class=
"section" id=
"id1018">
45 <h3><a class=
"subsection-title" href=
"#parameters" name=
"parameters">Parameters
</a></h3>
46 <table border=
"1" class=
"docutils table">
52 <thead valign=
"bottom">
53 <tr><th class=
"head">Parameter
</th>
54 <th class=
"head">Requirement
</th>
55 <th class=
"head">Description
</th>
59 <tr><td><tt class=
"literal"><span class=
"pre">T1
</span></tt>,
<tt class=
"literal"><span class=
"pre">T2
</span></tt></td>
60 <td><a class=
"reference internal" href=
"./integral-constant.html">Integral Constant
</a></td>
61 <td>Operation's arguments.
</td>
65 <p>[
<em>Note:
</em> The requirements listed in this specification
66 are the ones imposed by the default implementation. See
<a class=
"reference internal" href=
"./numeric-metafunction.html">Numeric Metafunction
</a> concept
67 for the details on how to provide an implementation for a user-defined numeric type
68 that does not satisfy the
<a class=
"reference internal" href=
"./integral-constant.html">Integral Constant
</a> requirements. —
<em>end note
</em>]
</p>
70 <div class=
"section" id=
"id1019">
71 <h3><a class=
"subsection-title" href=
"#expression-semantics" name=
"expression-semantics">Expression semantics
</a></h3>
72 <p>For any
<a class=
"reference internal" 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>
73 <pre class=
"literal-block">
74 typedef
<a href=
"./less.html" class=
"identifier">less
</a><c1,c2
>::type r;
76 <table class=
"docutils field-list" frame=
"void" rules=
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77 <col class=
"field-name" />
78 <col class=
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80 <tr class=
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"field-name">Return type:
</th><td class=
"field-body"><p class=
"first"><a class=
"reference internal" href=
"./integral-constant.html">Integral Constant
</a>.
</p>
83 <tr class=
"field"><th class=
"field-name">Semantics:
</th><td class=
"field-body"><p class=
"first">Equivalent to
</p>
84 <pre class=
"last literal-block">
85 typedef
<a href=
"./bool.html" class=
"identifier">bool_
</a>< (c1::value
< c2::value)
> r;
91 <!-- .......................................................................... -->
92 <pre class=
"literal-block">
93 typedef
<a href=
"./less.html" class=
"identifier">less
</a><c1,c2
> r;
95 <table class=
"docutils field-list" frame=
"void" rules=
"none">
96 <col class=
"field-name" />
97 <col class=
"field-body" />
99 <tr class=
"field"><th class=
"field-name">Return type:
</th><td class=
"field-body"><p class=
"first"><a class=
"reference internal" href=
"./integral-constant.html">Integral Constant
</a>.
</p>
102 <tr class=
"field"><th class=
"field-name">Semantics:
</th><td class=
"field-body"><p class=
"first">Equivalent to
</p>
103 <pre class=
"last literal-block">
104 struct r :
<a href=
"./less.html" class=
"identifier">less
</a><c1,c2
>::type {};
111 <div class=
"section" id=
"id1020">
112 <h3><a class=
"subsection-title" href=
"#complexity" name=
"complexity">Complexity
</a></h3>
113 <p>Amortized constant time.
</p>
115 <div class=
"section" id=
"id1021">
116 <h3><a class=
"subsection-title" href=
"#example" name=
"example">Example
</a></h3>
117 <pre class=
"literal-block">
118 <a href=
"./assert.html" class=
"identifier">BOOST_MPL_ASSERT
</a>((
<a href=
"./less.html" class=
"identifier">less
</a>< <a href=
"./int.html" class=
"identifier">int_
</a><0>,
<a href=
"./int.html" class=
"identifier">int_
</a><10> > ));
119 <a href=
"./assert-not.html" class=
"identifier">BOOST_MPL_ASSERT_NOT
</a>((
<a href=
"./less.html" class=
"identifier">less
</a>< <a href=
"./long.html" class=
"identifier">long_
</a><10>,
<a href=
"./int.html" class=
"identifier">int_
</a><0> > ));
120 <a href=
"./assert-not.html" class=
"identifier">BOOST_MPL_ASSERT_NOT
</a>((
<a href=
"./less.html" class=
"identifier">less
</a>< <a href=
"./long.html" class=
"identifier">long_
</a><10>,
<a href=
"./int.html" class=
"identifier">int_
</a><10> > ));
123 <div class=
"section" id=
"id1022">
124 <h3><a class=
"subsection-title" href=
"#see-also" name=
"see-also">See also
</a></h3>
125 <p><a class=
"reference internal" href=
"./comparisons.html">Comparisons
</a>,
<a class=
"reference internal" href=
"./numeric-metafunction.html">Numeric Metafunction
</a>,
<a class=
"reference internal" href=
"./numeric-cast.html">numeric_cast
</a>,
<a class=
"reference internal" href=
"./less-equal.html">less_equal
</a>,
<a class=
"reference internal" href=
"./greater.html">greater
</a>,
<a class=
"reference internal" href=
"./equal.html">equal
</a></p>
126 <!-- Metafunctions/Comparisons//less_equal |20 -->
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132 <td><div class=
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2001-
2009 Aleksey Gurtovoy and David Abrahams
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133 Distributed under the Boost Software License, Version
1.0. (See accompanying
134 file LICENSE_1_0.txt or copy at
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