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<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="fusion.tuple.class_template_tuple.construction"></a><a class="link" href="construction.html" title="Construction">Construction</a>
</h4></div></div></div>
<h6>
<a name="fusion.tuple.class_template_tuple.construction.h0"></a>
<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>
</h6>
<p>
The <a href="http://std.dkuug.dk/jtc1/sc22/wg21/docs/papers/2002/n1403.pdf" target="_top">TR1
Tuple</a> type provides a default constructor, a constructor that takes
initializers for all of its elements, a copy constructor, and a converting
copy constructor. The details of the various constructors are described
in this section.
</p>
<h6>
<a name="fusion.tuple.class_template_tuple.construction.h1"></a>
<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>
</h6>
<div class="variablelist">
<p class="title"><b>Notation</b></p>
<dl class="variablelist">
<dt><span class="term"><code class="computeroutput"><span class="identifier">T1</span> <span class="special">...</span>
<span class="identifier">TN</span></code>, <code class="computeroutput"><span class="identifier">U1</span>
<span class="special">...</span> <span class="identifier">UN</span></code></span></dt>
<dd><p>
Tuple element types
</p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">P1</span> <span class="special">...</span>
<span class="identifier">PN</span></code></span></dt>
<dd><p>
Parameter types
</p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">Ti</span></code>, <code class="computeroutput"><span class="identifier">Ui</span></code></span></dt>
<dd><p>
The type of the <code class="computeroutput"><span class="identifier">i</span></code>th
element of a tuple
</p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">Pi</span></code></span></dt>
<dd><p>
The type of the <code class="computeroutput"><span class="identifier">i</span></code>th
parameter
</p></dd>
</dl>
</div>
<pre class="programlisting"><span class="identifier">tuple</span><span class="special">();</span>
</pre>
<p>
<span class="bold"><strong>Requirements</strong></span>: Each <code class="computeroutput"><span class="identifier">Ti</span></code>
is default constructable.
</p>
<p>
<span class="bold"><strong>Semantics</strong></span>: Default initializes each element
of the tuple.
</p>
<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>
</pre>
<p>
<span class="bold"><strong>Requirements</strong></span>: Each <code class="computeroutput"><span class="identifier">Pi</span></code>
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.
</p>
<p>
<span class="bold"><strong>Semantics</strong></span>: Copy initializes each element
with the corresponding parameter.
</p>
<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>
</pre>
<p>
<span class="bold"><strong>Requirements</strong></span>: Each <code class="computeroutput"><span class="identifier">Ti</span></code>
should be copy constructable.
</p>
<p>
<span class="bold"><strong>Semantics</strong></span>: Copy constructs each element
of <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>
with the corresponding element of <code class="computeroutput"><span class="identifier">t</span></code>.
</p>
<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>
<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>
</pre>
<p>
<span class="bold"><strong>Requirements</strong></span>: Each <code class="computeroutput"><span class="identifier">Ti</span></code>
shall be constructible from the corresponding <code class="computeroutput"><span class="identifier">Ui</span></code>.
</p>
<p>
<span class="bold"><strong>Semantics</strong></span>: Constructs each element of
<code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>
with the corresponding element of <code class="computeroutput"><span class="identifier">t</span></code>.
</p>
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<td align="right"><div class="copyright-footer">Copyright © 2001-2006, 2011, 2012 Joel de Guzman,
Dan Marsden, Tobias Schwinger<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
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>)
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