1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>deduce_sequence</title> 5<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../index.html" title="Chapter 1. Fusion 2.2"> 8<link rel="up" href="../support.html" title="Support"> 9<link rel="prev" href="deduce.html" title="deduce"> 10<link rel="next" href="pair.html" title="pair"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="deduce.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../support.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="pair.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h3 class="title"> 27<a name="fusion.support.deduce_sequence"></a><a class="link" href="deduce_sequence.html" title="deduce_sequence">deduce_sequence</a> 28</h3></div></div></div> 29<h5> 30<a name="fusion.support.deduce_sequence.h0"></a> 31 <span class="phrase"><a name="fusion.support.deduce_sequence.description"></a></span><a class="link" href="deduce_sequence.html#fusion.support.deduce_sequence.description">Description</a> 32 </h5> 33<p> 34 Applies <a class="link" href="../notes.html#fusion.notes.element_conversion"><span class="emphasis"><em>element 35 conversion</em></span></a> to each element in a <a class="link" href="../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward 36 Sequence</a>. The resulting type is a <a class="link" href="../sequence/concepts/random_access_sequence.html" title="Random Access Sequence">Random 37 Access Sequence</a> that provides a converting constructor accepting the 38 original type as its argument. 39 </p> 40<h5> 41<a name="fusion.support.deduce_sequence.h1"></a> 42 <span class="phrase"><a name="fusion.support.deduce_sequence.header"></a></span><a class="link" href="deduce_sequence.html#fusion.support.deduce_sequence.header">Header</a> 43 </h5> 44<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">support</span><span class="special">/</span><span class="identifier">deduce_sequence</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 45<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">include</span><span class="special">/</span><span class="identifier">deduce_sequence</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 46</pre> 47<h5> 48<a name="fusion.support.deduce_sequence.h2"></a> 49 <span class="phrase"><a name="fusion.support.deduce_sequence.synopsis"></a></span><a class="link" href="deduce_sequence.html#fusion.support.deduce_sequence.synopsis">Synopsis</a> 50 </h5> 51<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">traits</span> 52<span class="special">{</span> 53 <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Sequence</span><span class="special">></span> 54 <span class="keyword">struct</span> <span class="identifier">deduce_sequence</span> 55 <span class="special">{</span> 56 <span class="keyword">typedef</span> <span class="emphasis"><em>unspecified</em></span> <span class="identifier">type</span><span class="special">;</span> 57 <span class="special">};</span> 58<span class="special">}</span> 59</pre> 60<h5> 61<a name="fusion.support.deduce_sequence.h3"></a> 62 <span class="phrase"><a name="fusion.support.deduce_sequence.example"></a></span><a class="link" href="deduce_sequence.html#fusion.support.deduce_sequence.example">Example</a> 63 </h5> 64<pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Seq</span><span class="special">></span> 65<span class="keyword">struct</span> <span class="identifier">holder</span> 66<span class="special">{</span> 67 <span class="keyword">typename</span> <span class="identifier">traits</span><span class="special">::</span><span class="identifier">deduce_sequence</span><span class="special"><</span><span class="identifier">Seq</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">element</span><span class="special">;</span> 68 69 <span class="identifier">holder</span><span class="special">(</span><span class="identifier">Seq</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">a</span><span class="special">)</span> 70 <span class="special">:</span> <span class="identifier">element</span><span class="special">(</span><span class="identifier">a</span><span class="special">)</span> 71 <span class="special">{</span> <span class="special">}</span> 72<span class="special">};</span> 73 74<span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">T0</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">T1</span><span class="special">></span> 75<span class="identifier">holder</span><span class="special"><</span> <a class="link" href="../container/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special"><</span><span class="identifier">T0</span> <span class="keyword">const</span> <span class="special">&,</span> <span class="identifier">T1</span> <span class="keyword">const</span> <span class="special">&></span> <span class="special">></span> 76<span class="identifier">make_holder</span><span class="special">(</span><span class="identifier">T0</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">a0</span><span class="special">,</span> <span class="identifier">T1</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">a1</span><span class="special">)</span> 77<span class="special">{</span> 78 <span class="keyword">typedef</span> <a class="link" href="../container/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special"><</span><span class="identifier">T0</span> <span class="keyword">const</span> <span class="special">&,</span> <span class="identifier">T1</span> <span class="keyword">const</span> <span class="special">&></span> <span class="identifier">arg_vec_t</span><span class="special">;</span> 79 <span class="keyword">return</span> <span class="identifier">holder</span><span class="special"><</span><span class="identifier">arg_vec_t</span><span class="special">>(</span> <span class="identifier">arg_vec_t</span><span class="special">(</span><span class="identifier">a0</span><span class="special">,</span><span class="identifier">a1</span><span class="special">)</span> <span class="special">);</span> 80<span class="special">}</span> 81</pre> 82<h5> 83<a name="fusion.support.deduce_sequence.h4"></a> 84 <span class="phrase"><a name="fusion.support.deduce_sequence.see_also"></a></span><a class="link" href="deduce_sequence.html#fusion.support.deduce_sequence.see_also">See 85 also</a> 86 </h5> 87<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"> 88 <a class="link" href="deduce.html" title="deduce"><code class="computeroutput"><span class="identifier">deduce</span></code></a> 89 </li></ul></div> 90</div> 91<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 92<td align="left"></td> 93<td align="right"><div class="copyright-footer">Copyright © 2001-2006, 2011, 2012 Joel de Guzman, 94 Dan Marsden, Tobias Schwinger<p> 95 Distributed under the Boost Software License, Version 1.0. (See accompanying 96 file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) 97 </p> 98</div></td> 99</tr></table> 100<hr> 101<div class="spirit-nav"> 102<a accesskey="p" href="deduce.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../support.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="pair.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 103</div> 104</body> 105</html> 106
