forked from boostorg/fusion
merge from trunk
[SVN r56179]
This commit is contained in:
Joel de Guzman
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>empty</title>
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<link rel="stylesheet" href="../../../../../../../../doc/html/boostbook.css" type="text/css">
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<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
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<link rel="start" href="../../../../index.html" title="Chapter<65>1.<2E>Fusion 2.0">
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<meta name="generator" content="DocBook XSL Stylesheets V1.65.1">
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<link rel="home" href="../../../../index.html" title="Chapter<65>1.<2E>Fusion 2.0">
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<link rel="up" href="../metafunctions.html" title="Metafunctions">
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<link rel="prev" href="end.html" title="end">
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<link rel="previous" href="end.html" title="end">
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<link rel="next" href="front.html" title="front">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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@ -23,28 +23,31 @@
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<a accesskey="p" href="end.html"><img src="../../../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../metafunctions.html"><img src="../../../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="front.html"><img src="../../../../../../../../doc/html/images/next.png" alt="Next"></a>
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</div>
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<div class="section" lang="en">
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<div class="titlepage"><div><div><h5 class="title">
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<a name="fusion.sequence.intrinsic.metafunctions.empty"></a><a href="empty.html" title="empty">empty</a></h5></div></div></div>
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<div class="titlepage">
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<div><div><h5 class="title">
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<a name="fusion.sequence.intrinsic.metafunctions.empty"></a><a href="empty.html" title="empty">empty</a>
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</h5></div></div>
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<div></div>
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</div>
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<a name="fusion.sequence.intrinsic.metafunctions.empty.description"></a><h6>
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<a name="id509917"></a>
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<a name="id461329"></a>
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<a href="empty.html#fusion.sequence.intrinsic.metafunctions.empty.description">Description</a>
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</h6>
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<p>
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Returns the result type of <a href="../functions/empty.html" title="empty"><tt class="computeroutput"><span class="identifier">empty</span></tt></a>.
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</p>
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<a name="fusion.sequence.intrinsic.metafunctions.empty.synopsis"></a><h6>
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<a name="id509966"></a>
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<a name="id461377"></a>
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<a href="empty.html#fusion.sequence.intrinsic.metafunctions.empty.synopsis">Synopsis</a>
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</h6>
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<pre class="programlisting">
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<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Seq</span><span class="special">></span>
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<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Seq</span><span class="special">></span>
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<span class="keyword">struct</span> <span class="identifier">empty</span>
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<span class="special">{</span>
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<span class="keyword">typedef</span> <span class="emphasis"><em>unspecified</em></span> <span class="identifier">type</span><span class="special">;</span>
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<span class="special">};</span>
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</pre>
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<div class="table">
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<a name="id510066"></a><p class="title"><b>Table<EFBFBD>1.21.<2E>Parameters</b></p>
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<a name="id461474"></a><p class="title"><b>Table<EFBFBD>1.21.<2E>Parameters</b></p>
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<table class="table" summary="Parameters">
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<colgroup>
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<col>
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@ -52,50 +55,37 @@
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<col>
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</colgroup>
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<thead><tr>
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<th>
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<p>
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<th><p>
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Parameter
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</p>
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</th>
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<th>
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<p>
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</p></th>
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<th><p>
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Requirement
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</p>
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</th>
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<th>
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<p>
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</p></th>
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<th><p>
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Description
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</p>
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</th>
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</p></th>
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</tr></thead>
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<tbody><tr>
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<td>
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<p>
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<td><p>
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<tt class="computeroutput"><span class="identifier">Seq</span></tt>
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</p>
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</td>
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<td>
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<p>
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</p></td>
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<td><p>
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A model of <a href="../../concepts/forward_sequence.html" title="Forward
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Sequence">Forward
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Sequence</a>
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</p>
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</td>
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<td>
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<p>
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</p></td>
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<td><p>
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Argument sequence
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</p>
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</td>
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</p></td>
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</tr></tbody>
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</table>
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</div>
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<a name="fusion.sequence.intrinsic.metafunctions.empty.expression_semantics"></a><h6>
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<a name="id510168"></a>
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<a name="id461575"></a>
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<a href="empty.html#fusion.sequence.intrinsic.metafunctions.empty.expression_semantics">Expression
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Semantics</a>
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</h6>
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<pre class="programlisting">
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<span class="identifier">result_of</span><span class="special">::</span><span class="identifier">empty</span><span class="special"><</span><span class="identifier">Seq</span><span class="special">>::</span><span class="identifier">type</span>
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<pre class="programlisting"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">empty</span><span class="special"><</span><span class="identifier">Seq</span><span class="special">>::</span><span class="identifier">type</span>
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</pre>
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<p>
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<span class="bold"><b>Return type</b></span>: An <a href="http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html" target="_top">MPL
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/sequence/intrinsic/empty.hpp>
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</p>
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<a name="fusion.sequence.intrinsic.metafunctions.empty.example"></a><h6>
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<a name="id510330"></a>
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<a name="id461733"></a>
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<a href="empty.html#fusion.sequence.intrinsic.metafunctions.empty.example">Example</a>
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</h6>
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<pre class="programlisting">
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<span class="keyword">typedef</span> <a href="../../../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a><span class="special"><></span> <span class="identifier">empty_vec</span><span class="special">;</span>
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<pre class="programlisting"><span class="keyword">typedef</span> <a href="../../../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a><span class="special"><></span> <span class="identifier">empty_vec</span><span class="special">;</span>
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<span class="keyword">typedef</span> <a href="../../../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a><span class="special"><</span><span class="keyword">int</span><span class="special">,</span><span class="keyword">float</span><span class="special">,</span><span class="keyword">char</span><span class="special">></span> <span class="identifier">vec</span><span class="special">;</span>
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<span class="identifier">BOOST_MPL_ASSERT</span><span class="special">((</span><a href="empty.html" title="empty"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">empty</span></tt></a><span class="special"><</span><span class="identifier">empty_vec</span><span class="special">>));</span>
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