1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Construction</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="../class_template_tuple.html" title="Class template tuple"> 10<link rel="next" href="tuple_creation_functions.html" title="Tuple creation functions"> 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="../class_template_tuple.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_creation_functions.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.construction"></a><a class="link" href="construction.html" title="Construction">Construction</a> 28</h4></div></div></div> 29<h6> 30<a name="fusion.tuple.class_template_tuple.construction.h0"></a> 31 <span class="phrase"><a name="fusion.tuple.class_template_tuple.construction.description"></a></span><a class="link" href="construction.html#fusion.tuple.class_template_tuple.construction.description">Description</a> 32 </h6> 33<p> 34 The <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2002/n1403.pdf" target="_top">TR1 35 Tuple</a> type provides a default constructor, a constructor that takes 36 initializers for all of its elements, a copy constructor, and a converting 37 copy constructor. The details of the various constructors are described 38 in this section. 39 </p> 40<h6> 41<a name="fusion.tuple.class_template_tuple.construction.h1"></a> 42 <span class="phrase"><a name="fusion.tuple.class_template_tuple.construction.specification"></a></span><a class="link" href="construction.html#fusion.tuple.class_template_tuple.construction.specification">Specification</a> 43 </h6> 44<div class="variablelist"> 45<p class="title"><b>Notation</b></p> 46<dl class="variablelist"> 47<dt><span class="term"><code class="computeroutput"><span class="identifier">T1</span> <span class="special">...</span> 48 <span class="identifier">TN</span></code>, <code class="computeroutput"><span class="identifier">U1</span> 49 <span class="special">...</span> <span class="identifier">UN</span></code></span></dt> 50<dd><p> 51 Tuple element types 52 </p></dd> 53<dt><span class="term"><code class="computeroutput"><span class="identifier">P1</span> <span class="special">...</span> 54 <span class="identifier">PN</span></code></span></dt> 55<dd><p> 56 Parameter types 57 </p></dd> 58<dt><span class="term"><code class="computeroutput"><span class="identifier">Ti</span></code>, <code class="computeroutput"><span class="identifier">Ui</span></code></span></dt> 59<dd><p> 60 The type of the <code class="computeroutput"><span class="identifier">i</span></code>th 61 element of a tuple 62 </p></dd> 63<dt><span class="term"><code class="computeroutput"><span class="identifier">Pi</span></code></span></dt> 64<dd><p> 65 The type of the <code class="computeroutput"><span class="identifier">i</span></code>th 66 parameter 67 </p></dd> 68</dl> 69</div> 70<pre class="programlisting"><span class="identifier">tuple</span><span class="special">();</span> 71</pre> 72<p> 73 <span class="bold"><strong>Requirements</strong></span>: Each <code class="computeroutput"><span class="identifier">Ti</span></code> 74 is default-constructible. 75 </p> 76<p> 77 <span class="bold"><strong>Semantics</strong></span>: Default initializes each element 78 of the tuple. 79 </p> 80<pre class="programlisting"><span class="identifier">tuple</span><span class="special">(</span><span class="identifier">P1</span><span class="special">,</span><span class="identifier">P2</span><span class="special">,...,</span><span class="identifier">PN</span><span class="special">);</span> 81</pre> 82<p> 83 <span class="bold"><strong>Requirements</strong></span>: Each <code class="computeroutput"><span class="identifier">Pi</span></code> 84 is <code class="computeroutput"><span class="identifier">Ti</span></code> if <code class="computeroutput"><span class="identifier">Ti</span></code> is a reference type, <code class="computeroutput"><span class="keyword">const</span> <span class="identifier">Ti</span><span class="special">&</span></code> otherwise. 85 </p> 86<p> 87 <span class="bold"><strong>Semantics</strong></span>: Copy initializes each element 88 with the corresponding parameter. 89 </p> 90<pre class="programlisting"><span class="identifier">tuple</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">tuple</span><span class="special">&</span> <span class="identifier">t</span><span class="special">);</span> 91</pre> 92<p> 93 <span class="bold"><strong>Requirements</strong></span>: Each <code class="computeroutput"><span class="identifier">Ti</span></code> 94 should be copy-constructible. 95 </p> 96<p> 97 <span class="bold"><strong>Semantics</strong></span>: Copy constructs each element 98 of <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code> 99 with the corresponding element of <code class="computeroutput"><span class="identifier">t</span></code>. 100 </p> 101<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">U1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">U2</span><span class="special">,</span> <span class="special">...,</span> <span class="keyword">typename</span> <span class="identifier">UN</span><span class="special">></span> 102<span class="identifier">tuple</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">tuple</span><span class="special"><</span><span class="identifier">U1</span><span class="special">,</span> <span class="identifier">U2</span><span class="special">,</span> <span class="special">...,</span> <span class="identifier">UN</span><span class="special">>&</span> <span class="identifier">t</span><span class="special">);</span> 103</pre> 104<p> 105 <span class="bold"><strong>Requirements</strong></span>: Each <code class="computeroutput"><span class="identifier">Ti</span></code> 106 shall be constructible from the corresponding <code class="computeroutput"><span class="identifier">Ui</span></code>. 107 </p> 108<p> 109 <span class="bold"><strong>Semantics</strong></span>: Constructs each element of 110 <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code> 111 with the corresponding element of <code class="computeroutput"><span class="identifier">t</span></code>. 112 </p> 113</div> 114<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 115<td align="left"></td> 116<td align="right"><div class="copyright-footer">Copyright © 2001-2006, 2011, 2012 Joel de Guzman, 117 Dan Marsden, Tobias Schwinger<p> 118 Distributed under the Boost Software License, Version 1.0. (See accompanying 119 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>) 120 </p> 121</div></td> 122</tr></table> 123<hr> 124<div class="spirit-nav"> 125<a accesskey="p" href="../class_template_tuple.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_creation_functions.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 126</div> 127</body> 128</html> 129
