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<title>Relational operators</title>
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<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="fusion.tuple.class_template_tuple.relational_operators"></a><a class="link" href="relational_operators.html" title="Relational operators">Relational
operators</a>
</h4></div></div></div>
<h6>
<a name="fusion.tuple.class_template_tuple.relational_operators.h0"></a>
<span class="phrase"><a name="fusion.tuple.class_template_tuple.relational_operators.description"></a></span><a class="link" href="relational_operators.html#fusion.tuple.class_template_tuple.relational_operators.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> provides the standard boolean relational operators.
</p>
<h6>
<a name="fusion.tuple.class_template_tuple.relational_operators.h1"></a>
<span class="phrase"><a name="fusion.tuple.class_template_tuple.relational_operators.specification"></a></span><a class="link" href="relational_operators.html#fusion.tuple.class_template_tuple.relational_operators.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="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>
<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="keyword">bool</span> <span class="keyword">operator</span><span class="special">==(</span>
<span class="keyword">const</span> <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> <span class="identifier">lhs</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">rhs</span><span class="special">);</span>
</pre>
<p>
<span class="bold"><strong>Requirements</strong></span>: For all <code class="computeroutput"><span class="identifier">i</span></code>,
<code class="computeroutput"><span class="number">1</span> <span class="special"><=</span>
<span class="identifier">i</span> <span class="special"><</span>
<span class="identifier">N</span></code>, <code class="computeroutput"><a class="link" href="element_access.html" title="Element access"><code class="computeroutput"><span class="identifier">get</span></code></a><span class="special"><</span><span class="identifier">i</span><span class="special">>(</span><span class="identifier">lhs</span><span class="special">)</span> <span class="special">==</span> <a class="link" href="element_access.html" title="Element access"><code class="computeroutput"><span class="identifier">get</span></code></a><span class="special"><</span><span class="identifier">i</span><span class="special">>(</span><span class="identifier">rhs</span><span class="special">)</span></code>
is a valid expression returning a type that is convertible to <code class="computeroutput"><span class="keyword">bool</span></code>.
</p>
<p>
<span class="bold"><strong>Semantics</strong></span>: Returns <code class="computeroutput"><span class="keyword">true</span></code>
if and only if <code class="computeroutput"><a class="link" href="element_access.html" title="Element access"><code class="computeroutput"><span class="identifier">get</span></code></a><span class="special"><</span><span class="identifier">i</span><span class="special">>(</span><span class="identifier">lhs</span><span class="special">)</span> <span class="special">==</span> <a class="link" href="element_access.html" title="Element access"><code class="computeroutput"><span class="identifier">get</span></code></a><span class="special"><</span><span class="identifier">i</span><span class="special">>(</span><span class="identifier">rhs</span><span class="special">)</span></code>
for all <code class="computeroutput"><span class="identifier">i</span></code>. For any 2 zero
length tuples <code class="computeroutput"><span class="identifier">e</span></code> and <code class="computeroutput"><span class="identifier">f</span></code>, <code class="computeroutput"><span class="identifier">e</span>
<span class="special">==</span> <span class="identifier">f</span></code>
returns <code class="computeroutput"><span class="keyword">true</span></code>.
</p>
<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>
<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="keyword">bool</span> <span class="keyword">operator</span><span class="special"><(</span>
<span class="keyword">const</span> <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> <span class="identifier">lhs</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">rhs</span><span class="special">);</span>
</pre>
<p>
<span class="bold"><strong>Requirements</strong></span>: For all <code class="computeroutput"><span class="identifier">i</span></code>,
<code class="computeroutput"><span class="number">1</span> <span class="special"><=</span>
<span class="identifier">i</span> <span class="special"><</span>
<span class="identifier">N</span></code>, <code class="computeroutput"><a class="link" href="element_access.html" title="Element access"><code class="computeroutput"><span class="identifier">get</span></code></a><span class="special"><</span><span class="identifier">i</span><span class="special">>(</span><span class="identifier">lhs</span><span class="special">)</span> <span class="special"><</span> <a class="link" href="element_access.html" title="Element access"><code class="computeroutput"><span class="identifier">get</span></code></a><span class="special"><</span><span class="identifier">i</span><span class="special">>(</span><span class="identifier">rhs</span><span class="special">)</span></code>
is a valid expression returning a type that is convertible to <code class="computeroutput"><span class="keyword">bool</span></code>.
</p>
<p>
<span class="bold"><strong>Semantics</strong></span>: Returns the lexicographical
comparison of between <code class="computeroutput"><span class="identifier">lhs</span></code>
and <code class="computeroutput"><span class="identifier">rhs</span></code>.
</p>
<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>
<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="keyword">bool</span> <span class="keyword">operator</span><span class="special">!=(</span>
<span class="keyword">const</span> <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> <span class="identifier">lhs</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">rhs</span><span class="special">);</span>
</pre>
<p>
<span class="bold"><strong>Requirements</strong></span>: For all <code class="computeroutput"><span class="identifier">i</span></code>,
<code class="computeroutput"><span class="number">1</span> <span class="special"><=</span>
<span class="identifier">i</span> <span class="special"><</span>
<span class="identifier">N</span></code>, <code class="computeroutput"><a class="link" href="element_access.html" title="Element access"><code class="computeroutput"><span class="identifier">get</span></code></a><span class="special"><</span><span class="identifier">i</span><span class="special">>(</span><span class="identifier">lhs</span><span class="special">)</span> <span class="special">==</span> <a class="link" href="element_access.html" title="Element access"><code class="computeroutput"><span class="identifier">get</span></code></a><span class="special"><</span><span class="identifier">i</span><span class="special">>(</span><span class="identifier">rhs</span><span class="special">)</span></code>
is a valid expression returning a type that is convertible to <code class="computeroutput"><span class="keyword">bool</span></code>.
</p>
<p>
<span class="bold"><strong>Semantics</strong></span>: Returns <code class="computeroutput"><span class="special">!(</span><span class="identifier">lhs</span> <span class="special">==</span> <span class="identifier">rhs</span><span class="special">)</span></code>.
</p>
<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>
<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="keyword">bool</span> <span class="keyword">operator</span><span class="special"><=(</span>
<span class="keyword">const</span> <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> <span class="identifier">lhs</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">rhs</span><span class="special">);</span>
</pre>
<p>
<span class="bold"><strong>Requirements</strong></span>: For all <code class="computeroutput"><span class="identifier">i</span></code>,
<code class="computeroutput"><span class="number">1</span> <span class="special"><=</span>
<span class="identifier">i</span> <span class="special"><</span>
<span class="identifier">N</span></code>, <code class="computeroutput"><a class="link" href="element_access.html" title="Element access"><code class="computeroutput"><span class="identifier">get</span></code></a><span class="special"><</span><span class="identifier">i</span><span class="special">>(</span><span class="identifier">rhs</span><span class="special">)</span> <span class="special"><</span> <a class="link" href="element_access.html" title="Element access"><code class="computeroutput"><span class="identifier">get</span></code></a><span class="special"><</span><span class="identifier">i</span><span class="special">>(</span><span class="identifier">lhs</span><span class="special">)</span></code>
is a valid expression returning a type that is convertible to <code class="computeroutput"><span class="keyword">bool</span></code>.
</p>
<p>
<span class="bold"><strong>Semantics</strong></span>: Returns <code class="computeroutput"><span class="special">!(</span><span class="identifier">rhs</span> <span class="special"><</span> <span class="identifier">lhs</span><span class="special">)</span></code>
</p>
<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>
<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="keyword">bool</span> <span class="keyword">operator</span><span class="special">>(</span>
<span class="keyword">const</span> <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> <span class="identifier">lhs</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">rhs</span><span class="special">);</span>
</pre>
<p>
<span class="bold"><strong>Requirements</strong></span>: For all <code class="computeroutput"><span class="identifier">i</span></code>,
<code class="computeroutput"><span class="number">1</span> <span class="special"><=</span>
<span class="identifier">i</span> <span class="special"><</span>
<span class="identifier">N</span></code>, <code class="computeroutput"><a class="link" href="element_access.html" title="Element access"><code class="computeroutput"><span class="identifier">get</span></code></a><span class="special"><</span><span class="identifier">i</span><span class="special">>(</span><span class="identifier">rhs</span><span class="special">)</span> <span class="special"><</span> <a class="link" href="element_access.html" title="Element access"><code class="computeroutput"><span class="identifier">get</span></code></a><span class="special"><</span><span class="identifier">i</span><span class="special">>(</span><span class="identifier">lhs</span><span class="special">)</span></code>
is a valid expression returning a type that is convertible to <code class="computeroutput"><span class="keyword">bool</span></code>.
</p>
<p>
<span class="bold"><strong>Semantics</strong></span>: Returns <code class="computeroutput"><span class="identifier">rhs</span>
<span class="special"><</span> <span class="identifier">lhs</span></code>.
</p>
<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>
<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="keyword">bool</span> <span class="keyword">operator</span><span class="special">>=(</span>
<span class="keyword">const</span> <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> <span class="identifier">lhs</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">rhs</span><span class="special">);</span>
</pre>
<p>
<span class="bold"><strong>Requirements</strong></span>: For all <code class="computeroutput"><span class="identifier">i</span></code>,
<code class="computeroutput"><span class="number">1</span> <span class="special"><=</span>
<span class="identifier">i</span> <span class="special"><</span>
<span class="identifier">N</span></code>, <code class="computeroutput"><a class="link" href="element_access.html" title="Element access"><code class="computeroutput"><span class="identifier">get</span></code></a><span class="special"><</span><span class="identifier">i</span><span class="special">>(</span><span class="identifier">lhs</span><span class="special">)</span> <span class="special"><</span> <a class="link" href="element_access.html" title="Element access"><code class="computeroutput"><span class="identifier">get</span></code></a><span class="special"><</span><span class="identifier">i</span><span class="special">>(</span><span class="identifier">rhs</span><span class="special">)</span></code>
is a valid expression returning a type that is convertible to <code class="computeroutput"><span class="keyword">bool</span></code>.
</p>
<p>
<span class="bold"><strong>Semantics</strong></span>: Returns <code class="computeroutput"><span class="special">!(</span><span class="identifier">lhs</span> <span class="special"><</span> <span class="identifier">rhs</span><span class="special">)</span></code>.
</p>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<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>)
</p>
</div></td>
</tr></table>
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