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boost_range/doc/html/range/reference/algorithms/mutating/partition.html

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<div class="titlepage"><div><div><h5 class="title">
<a name="range.reference.algorithms.mutating.partition"></a><a class="link" href="partition.html" title="partition"> partition</a>
</h5></div></div></div>
<a name="range.reference.algorithms.mutating.partition.prototype"></a><h6>
<a name="id3074827"></a>
<a class="link" href="partition.html#range.reference.algorithms.mutating.partition.prototype">Prototype</a>
</h6>
<p>
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span>
<span class="keyword">class</span> <span class="identifier">ForwardRange</span><span class="special">,</span>
<span class="keyword">class</span> <span class="identifier">UnaryPredicate</span>
<span class="special">&gt;</span>
<span class="keyword">typename</span> <span class="identifier">range_iterator</span><span class="special">&lt;</span><span class="identifier">ForwardRange</span><span class="special">&gt;::</span><span class="identifier">type</span>
<span class="identifier">partition</span><span class="special">(</span><span class="identifier">ForwardRange</span><span class="special">&amp;</span> <span class="identifier">rng</span><span class="special">,</span> <span class="identifier">UnaryPredicate</span> <span class="identifier">pred</span><span class="special">);</span>
<span class="keyword">template</span><span class="special">&lt;</span>
<span class="keyword">class</span> <span class="identifier">ForwardRange</span><span class="special">,</span>
<span class="keyword">class</span> <span class="identifier">UnaryPredicate</span>
<span class="special">&gt;</span>
<span class="keyword">typename</span> <span class="identifier">range_iterator</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="identifier">ForwardRange</span><span class="special">&gt;::</span><span class="identifier">type</span>
<span class="identifier">partition</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">ForwardRange</span><span class="special">&amp;</span> <span class="identifier">rng</span><span class="special">,</span> <span class="identifier">UnaryPredicate</span> <span class="identifier">pred</span><span class="special">);</span>
<span class="keyword">template</span><span class="special">&lt;</span>
<span class="identifier">range_return_value</span> <span class="identifier">re</span><span class="special">,</span>
<span class="keyword">class</span> <span class="identifier">ForwardRange</span><span class="special">,</span>
<span class="keyword">class</span> <span class="identifier">UnaryPredicate</span>
<span class="special">&gt;</span>
<span class="keyword">typename</span> <span class="identifier">range_return</span><span class="special">&lt;</span><span class="identifier">ForwardRange</span><span class="special">,</span> <span class="identifier">re</span><span class="special">&gt;::</span><span class="identifier">type</span>
<span class="identifier">partition</span><span class="special">(</span><span class="identifier">ForwardRange</span><span class="special">&amp;</span> <span class="identifier">rng</span><span class="special">,</span> <span class="identifier">UnaryPredicate</span> <span class="identifier">pred</span><span class="special">);</span>
<span class="keyword">template</span><span class="special">&lt;</span>
<span class="identifier">range_return_value</span> <span class="identifier">re</span><span class="special">,</span>
<span class="keyword">class</span> <span class="identifier">ForwardRange</span><span class="special">,</span>
<span class="keyword">class</span> <span class="identifier">UnaryPredicate</span>
<span class="special">&gt;</span>
<span class="keyword">typename</span> <span class="identifier">range_return</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="identifier">ForwardRange</span><span class="special">,</span> <span class="identifier">re</span><span class="special">&gt;::</span><span class="identifier">type</span>
<span class="identifier">partition</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">ForwardRange</span><span class="special">&amp;</span> <span class="identifier">rng</span><span class="special">,</span> <span class="identifier">UnaryPredicate</span> <span class="identifier">pred</span><span class="special">);</span>
</pre>
<p>
</p>
<a name="range.reference.algorithms.mutating.partition.description"></a><h6>
<a name="id3075410"></a>
<a class="link" href="partition.html#range.reference.algorithms.mutating.partition.description">Description</a>
</h6>
<p>
<code class="computeroutput"><span class="identifier">partition</span></code> orders the
elements in <code class="computeroutput"><span class="identifier">rng</span></code> based
on <code class="computeroutput"><span class="identifier">pred</span></code>, such that the
elements that satisfy <code class="computeroutput"><span class="identifier">pred</span></code>
precede the elements that do not. In the versions that return a single
iterator, the return value is the middle iterator. In the versions that
have a configurable range_return, <code class="computeroutput"><span class="identifier">found</span></code>
corresponds to the middle iterator.
</p>
<a name="range.reference.algorithms.mutating.partition.definition"></a><h6>
<a name="id3075494"></a>
<a class="link" href="partition.html#range.reference.algorithms.mutating.partition.definition">Definition</a>
</h6>
<p>
Defined in the header file <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">range</span><span class="special">/</span><span class="identifier">algorithm</span><span class="special">/</span><span class="identifier">partition</span><span class="special">.</span><span class="identifier">hpp</span></code>
</p>
<a name="range.reference.algorithms.mutating.partition.requirements"></a><h6>
<a name="id3075566"></a>
<a class="link" href="partition.html#range.reference.algorithms.mutating.partition.requirements">Requirements</a>
</h6>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
<code class="computeroutput"><span class="identifier">ForwardRange</span></code> is a
model of the <a class="link" href="../../../concepts/forward_range.html" title="Forward Range">Forward
Range</a> Concept.
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">UnaryPredicate</span></code> is
a model of the <code class="computeroutput"><span class="identifier">PredicateConcept</span></code>.
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">ForwardRange</span></code>'s value
type is convertible to <code class="computeroutput"><span class="identifier">UnaryPredicate</span></code>'s
argument type.
</li>
</ul></div>
<a name="range.reference.algorithms.mutating.partition.complexity"></a><h6>
<a name="id3075675"></a>
<a class="link" href="partition.html#range.reference.algorithms.mutating.partition.complexity">Complexity</a>
</h6>
<p>
Linear. Exactly <code class="computeroutput"><span class="identifier">distance</span><span class="special">(</span><span class="identifier">rng</span><span class="special">)</span></code> applications of <code class="computeroutput"><span class="identifier">pred</span></code>,
and at most <code class="computeroutput"><span class="identifier">distance</span><span class="special">(</span><span class="identifier">rng</span><span class="special">)</span> <span class="special">/</span> <span class="number">2</span></code>
swaps.
</p>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2003 -2010 Thorsten Ottosen, Neil Groves<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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