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17<div class="section" id="lambda-expression">
18<h1><a class="toc-backref" href="./metafunctions-concepts.html#id440" name="lambda-expression">Lambda Expression</a></h1>
19<div class="section" id="lambda-description">
20<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
21<p>A <a class="reference" href="./lambda-expression.html">Lambda Expression</a> is a compile-time invocable entity in either of the following two
22forms:</p>
23<ul class="simple">
24<li><a class="reference" href="./metafunction-class.html">Metafunction Class</a></li>
25<li><a class="reference" href="./placeholder-expression.html">Placeholder Expression</a></li>
26</ul>
27<p>Most of the MPL components accept either of those, and the concept
28gives us a consice way to describe these requirements.</p>
29</div>
30<div class="section" id="lambda-expression-requirements">
31<h3><a class="subsection-title" href="#expression-requirements" name="expression-requirements">Expression requirements</a></h3>
32<p>See corresponding <a class="reference" href="./metafunction-class.html">Metafunction Class</a> and <a class="reference" href="./placeholder-expression.html">Placeholder Expression</a> specifications.</p>
33</div>
34<div class="section" id="lambda-models">
35<h3><a class="subsection-title" href="#models" name="models">Models</a></h3>
36<ul class="simple">
37<li><a class="refentry reference" href="./always.html"><tt class="refentry literal"><span class="pre">always</span></tt></a></li>
38<li><a class="refentry reference" href="./unpack-args.html"><tt class="refentry literal"><span class="pre">unpack_args</span></tt></a></li>
39<li><tt class="literal"><span class="pre"><a href="./plus.html" class="identifier">plus</a>&lt;_,</span> <span class="pre"><a href="./int.html" class="identifier">int_</a>&lt;2&gt;</span> <span class="pre">&gt;</span></tt></li>
40<li><tt class="literal"><span class="pre"><a href="./if.html" class="identifier">if_</a>&lt;</span> <span class="pre"><a href="./less.html" class="identifier">less</a>&lt;_1,</span> <span class="pre"><a href="./int.html" class="identifier">int_</a>&lt;7&gt;</span> <span class="pre">&gt;,</span> <span class="pre"><a href="./plus.html" class="identifier">plus</a>&lt;_1,_2&gt;,</span> <span class="pre">_1</span> <span class="pre">&gt;</span></tt></li>
41</ul>
42</div>
43<div class="section" id="lambda-see-also">
44<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
45<p><a class="reference" href="./metafunctions.html">Metafunctions</a>, <a class="reference" href="./placeholders.html">Placeholders</a>, <a class="refentry reference" href="./apply.html"><tt class="refentry literal"><span class="pre">apply</span></tt></a>, <a class="refentry reference" href="./lambda.html"><tt class="refentry literal"><span class="pre">lambda</span></tt></a></p>
46<!-- modtime: November 13, 2004 01:43:28 +0000 -->
47<!-- Metafunctions/Concepts//Placeholder Expression |40 -->
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