1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Tuple creation functions</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="../class_template_tuple.html" title="Class template tuple"> 9<link rel="prev" href="construction.html" title="Construction"> 10<link rel="next" href="tuple_helper_classes.html" title="Tuple helper classes"> 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="construction.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../class_template_tuple.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="tuple_helper_classes.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h4 class="title"> 27<a name="fusion.tuple.class_template_tuple.tuple_creation_functions"></a><a class="link" href="tuple_creation_functions.html" title="Tuple creation functions">Tuple 28 creation functions</a> 29</h4></div></div></div> 30<h6> 31<a name="fusion.tuple.class_template_tuple.tuple_creation_functions.h0"></a> 32 <span class="phrase"><a name="fusion.tuple.class_template_tuple.tuple_creation_functions.description"></a></span><a class="link" href="tuple_creation_functions.html#fusion.tuple.class_template_tuple.tuple_creation_functions.description">Description</a> 33 </h6> 34<p> 35 TR1 describes 2 utility functions for creating <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2002/n1403.pdf" target="_top">TR1 36 Tuple</a>. <code class="computeroutput"><span class="identifier">make_tuple</span></code> 37 builds a tuple out of it's argument list, and <code class="computeroutput"><span class="identifier">tie</span></code> 38 builds a tuple of references to it's arguments. The details of these creation 39 functions are described in this section. 40 </p> 41<h6> 42<a name="fusion.tuple.class_template_tuple.tuple_creation_functions.h1"></a> 43 <span class="phrase"><a name="fusion.tuple.class_template_tuple.tuple_creation_functions.specification"></a></span><a class="link" href="tuple_creation_functions.html#fusion.tuple.class_template_tuple.tuple_creation_functions.specification">Specification</a> 44 </h6> 45<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">T1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">T2</span><span class="special">,</span> <span class="special">...,</span> <span class="keyword">typename</span> <span class="identifier">TN</span><span class="special">></span> 46<span class="identifier">tuple</span><span class="special"><</span><span class="identifier">V1</span><span class="special">,</span> <span class="identifier">V2</span><span class="special">,</span> <span class="special">...,</span> <span class="identifier">VN</span><span class="special">></span> 47<span class="identifier">make_tuple</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">T1</span><span class="special">&</span> <span class="identifier">t1</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T2</span><span class="special">&</span> <span class="identifier">t2</span><span class="special">,</span> <span class="special">...,</span> <span class="keyword">const</span> <span class="identifier">TN</span><span class="special">&</span> <span class="identifier">tn</span><span class="special">);</span> 48</pre> 49<p> 50 Where <code class="computeroutput"><span class="identifier">Vi</span></code> is <code class="computeroutput"><span class="identifier">X</span><span class="special">&</span></code> 51 if the cv-unqualified type <code class="computeroutput"><span class="identifier">Ti</span></code> 52 is <code class="computeroutput"><span class="identifier">reference_wrapper</span><span class="special"><</span><span class="identifier">X</span><span class="special">></span></code>, 53 otherwise <code class="computeroutput"><span class="identifier">Vi</span></code> is <code class="computeroutput"><span class="identifier">Ti</span></code>. 54 </p> 55<p> 56 <span class="bold"><strong>Returns</strong></span>: <code class="computeroutput"><span class="identifier">tuple</span><span class="special"><</span><span class="identifier">V1</span><span class="special">,</span> <span class="identifier">V2</span><span class="special">,</span> <span class="special">...,</span> <span class="identifier">VN</span><span class="special">>(</span><span class="identifier">t1</span><span class="special">,</span> <span class="identifier">t2</span><span class="special">,</span> <span class="special">...,</span> <span class="identifier">tN</span><span class="special">)</span></code> 57 </p> 58<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">T1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">T2</span><span class="special">,</span> <span class="special">...,</span> <span class="keyword">typename</span> <span class="identifier">TN</span><span class="special">></span> 59<span class="identifier">tuple</span><span class="special"><</span><span class="identifier">T1</span><span class="special">&,</span> <span class="identifier">T2</span><span class="special">&,</span> <span class="special">...,</span> <span class="identifier">TN</span><span class="special">&></span> 60<span class="identifier">tie</span><span class="special">(</span><span class="identifier">T1</span><span class="special">&</span> <span class="identifier">t1</span><span class="special">,</span> <span class="identifier">T2</span><span class="special">&</span> <span class="identifier">t2</span><span class="special">,</span> <span class="special">...,</span> <span class="identifier">TN</span><span class="special">&</span> <span class="identifier">tn</span><span class="special">);</span> 61</pre> 62<p> 63 <span class="bold"><strong>Returns</strong></span>: tuple<T1&, T2&, ..., 64 TN&>(t1, t2, ..., tN). When argument <code class="computeroutput"><span class="identifier">ti</span></code> 65 is <code class="computeroutput"><span class="identifier">ignore</span></code>, assigning any 66 value to the corresponding tuple element has no effect. 67 </p> 68</div> 69<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 70<td align="left"></td> 71<td align="right"><div class="copyright-footer">Copyright © 2001-2006, 2011, 2012 Joel de Guzman, 72 Dan Marsden, Tobias Schwinger<p> 73 Distributed under the Boost Software License, Version 1.0. (See accompanying 74 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>) 75 </p> 76</div></td> 77</tr></table> 78<hr> 79<div class="spirit-nav"> 80<a accesskey="p" href="construction.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../class_template_tuple.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="tuple_helper_classes.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 81</div> 82</body> 83</html> 84
