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<div class="titlepage"><div><div><h4 class="title">
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<a name="fusion.tuple.class_template_tuple.construction"></a><a class="link" href="construction.html" title="Construction">Construction</a>
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</h4></div></div></div>
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<a name="fusion.tuple.class_template_tuple.construction.description"></a><h6>
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<a name="id1014851"></a>
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<a class="link" href="construction.html#fusion.tuple.class_template_tuple.construction.description">Description</a>
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</h6>
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<p>
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The <a href="http://std.dkuug.dk/jtc1/sc22/wg21/docs/papers/2002/n1403.pdf" target="_top">TR1
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Tuple</a> type provides a default constructor, a constructor that takes
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initializers for all of its elements, a copy constructor, and a converting
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copy constructor. The details of the various constructors are described
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in this section.
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</p>
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<a name="fusion.tuple.class_template_tuple.construction.specification"></a><h6>
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<a name="id1014879"></a>
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<a class="link" href="construction.html#fusion.tuple.class_template_tuple.construction.specification">Specification</a>
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</h6>
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<div class="variablelist">
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<p class="title"><b>Notation</b></p>
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<dl>
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<dt><span class="term"><code class="computeroutput"><span class="identifier">T1</span> <span class="special">...</span>
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<span class="identifier">TN</span></code>, <code class="computeroutput"><span class="identifier">U1</span>
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<span class="special">...</span> <span class="identifier">UN</span></code></span></dt>
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<dd><p>
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Tuple element types
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</p></dd>
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<dt><span class="term"><code class="computeroutput"><span class="identifier">P1</span> <span class="special">...</span>
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<span class="identifier">PN</span></code></span></dt>
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<dd><p>
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Parameter types
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</p></dd>
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<dt><span class="term"><code class="computeroutput"><span class="identifier">Ti</span></code>, <code class="computeroutput"><span class="identifier">Ui</span></code></span></dt>
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<dd><p>
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The type of the <code class="computeroutput"><span class="identifier">i</span></code>th
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element of a tuple
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</p></dd>
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<dt><span class="term"><code class="computeroutput"><span class="identifier">Pi</span></code></span></dt>
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<dd><p>
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The type of the <code class="computeroutput"><span class="identifier">i</span></code>th
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parameter
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</p></dd>
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</dl>
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</div>
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<pre class="programlisting"><span class="identifier">tuple</span><span class="special">();</span>
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</pre>
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<p>
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<span class="bold"><strong>Requirements</strong></span>: Each <code class="computeroutput"><span class="identifier">Ti</span></code>
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is default constructable.
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</p>
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<p>
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<span class="bold"><strong>Semantics</strong></span>: Default initializes each element
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of the tuple.
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</p>
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<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>
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</pre>
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<p>
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<span class="bold"><strong>Requirements</strong></span>: Each <code class="computeroutput"><span class="identifier">Pi</span></code>
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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.
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</p>
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<p>
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<span class="bold"><strong>Semantics</strong></span>: Copy initializes each element
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with the corresponding parameter.
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</p>
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<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>
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</pre>
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<p>
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<span class="bold"><strong>Requirements</strong></span>: Each <code class="computeroutput"><span class="identifier">Ti</span></code>
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should be copy constructable.
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</p>
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<p>
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<span class="bold"><strong>Semantics</strong></span>: Copy constructs each element
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of <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>
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with the corresponding element of <code class="computeroutput"><span class="identifier">t</span></code>.
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</p>
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<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>
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<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>
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</pre>
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<p>
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<span class="bold"><strong>Requirements</strong></span>: Each <code class="computeroutput"><span class="identifier">Ti</span></code>
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shall be constructible from the corresponding <code class="computeroutput"><span class="identifier">Ui</span></code>.
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</p>
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<p>
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<span class="bold"><strong>Semantics</strong></span>: Constructs each element of
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<code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>
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with the corresponding element of <code class="computeroutput"><span class="identifier">t</span></code>.
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</p>
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</div>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"></td>
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<td align="right"><div class="copyright-footer">Copyright © 2001-2007 Joel de Guzman, Dan Marsden, Tobias
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Schwinger<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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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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</p>
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</div></td>
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