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add doc: min_element, max_element, minmax_element
2013-08-24 04:14:37 +00:00
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<div class="section" id="minmax-element">
<h1>minmax_element<a class="headerlink" href="#minmax-element" title="Permalink to this headline"></a></h1>
<div class="section" id="interface">
<h2>Interface<a class="headerlink" href="#interface" title="Permalink to this headline"></a></h2>
<div class="highlight-c++"><div class="highlight"><pre><span class="k">template</span><span class="o">&lt;</span><span class="k">typename</span> <span class="n">ForwardIterator</span><span class="o">&gt;</span>
<span class="kr">inline</span> <span class="n">SPROUT_CONSTEXPR</span> <span class="n">sprout</span><span class="o">::</span><span class="n">pair</span><span class="o">&lt;</span><span class="n">ForwardIterator</span><span class="p">,</span> <span class="n">ForwardIterator</span><span class="o">&gt;</span>
<span class="n">minmax_element</span><span class="p">(</span><span class="n">ForwardIterator</span> <span class="n">first</span><span class="p">,</span> <span class="n">ForwardIterator</span> <span class="n">last</span><span class="p">);</span>
<span class="k">template</span><span class="o">&lt;</span><span class="k">typename</span> <span class="n">ForwardIterator</span><span class="p">,</span> <span class="k">typename</span> <span class="n">Compare</span><span class="o">&gt;</span>
<span class="kr">inline</span> <span class="n">SPROUT_CONSTEXPR</span> <span class="n">sprout</span><span class="o">::</span><span class="n">pair</span><span class="o">&lt;</span><span class="n">ForwardIterator</span><span class="p">,</span> <span class="n">ForwardIterator</span><span class="o">&gt;</span>
<span class="n">minmax_element</span><span class="p">(</span><span class="n">ForwardIterator</span> <span class="n">first</span><span class="p">,</span> <span class="n">ForwardIterator</span> <span class="n">last</span><span class="p">,</span> <span class="n">Compare</span> <span class="n">comp</span><span class="p">);</span>
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<div class="section" id="returns">
<h2>Returns<a class="headerlink" href="#returns" title="Permalink to this headline"></a></h2>
<div class="line-block">
<div class="line"><tt class="docutils literal"><span class="pre">make_pair(first,</span> <span class="pre">first)</span></tt> if [first,last) is empty, otherwise <tt class="docutils literal"><span class="pre">make_pair(m,</span> <span class="pre">M)</span></tt>, where m is the first iterator in [first,last) such that no iterator in the range refers to a smaller element, and where M is the last iterator in [first,last) such that no iterator in the range refers to a larger element.</div>
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<div class="section" id="examples">
<h2>Examples<a class="headerlink" href="#examples" title="Permalink to this headline"></a></h2>
<div class="highlight-c++"><div class="highlight"><pre><span class="cp">#include &lt;sprout/algorithm/minmax_element.hpp&gt;</span>
<span class="cp">#include &lt;sprout/array.hpp&gt;</span>
<span class="cp">#include &lt;sprout/container.hpp&gt;</span>
<span class="k">using</span> <span class="k">namespace</span> <span class="n">sprout</span><span class="p">;</span>
<span class="n">SPROUT_STATIC_CONSTEXPR</span> <span class="k">auto</span> <span class="n">input</span> <span class="o">=</span> <span class="n">array</span><span class="o">&lt;</span><span class="kt">int</span><span class="p">,</span> <span class="mi">10</span><span class="o">&gt;</span><span class="p">{{</span><span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="mi">4</span><span class="p">,</span> <span class="mi">5</span><span class="p">,</span> <span class="mi">6</span><span class="p">,</span> <span class="mi">7</span><span class="p">,</span> <span class="mi">8</span><span class="p">,</span> <span class="mi">9</span><span class="p">,</span> <span class="mi">10</span><span class="p">}};</span>
<span class="n">SPROUT_STATIC_CONSTEXPR</span> <span class="k">auto</span> <span class="n">result</span> <span class="o">=</span> <span class="n">sprout</span><span class="o">::</span><span class="n">minmax_element</span><span class="p">(</span><span class="n">begin</span><span class="p">(</span><span class="n">input</span><span class="p">),</span> <span class="n">end</span><span class="p">(</span><span class="n">input</span><span class="p">));</span>
<span class="n">static_assert</span><span class="p">(</span><span class="o">*</span><span class="n">result</span><span class="p">.</span><span class="n">first</span> <span class="o">==</span> <span class="mi">1</span><span class="p">,</span> <span class="s">&quot;a min element is 1.&quot;</span><span class="p">);</span>
<span class="n">static_assert</span><span class="p">(</span><span class="o">*</span><span class="n">result</span><span class="p">.</span><span class="n">second</span> <span class="o">==</span> <span class="mi">10</span><span class="p">,</span> <span class="s">&quot;a max element is 10.&quot;</span><span class="p">);</span>
<span class="n">static_assert</span><span class="p">(</span><span class="n">result</span><span class="p">.</span><span class="n">first</span> <span class="o">-</span> <span class="n">begin</span><span class="p">(</span><span class="n">input</span><span class="p">)</span> <span class="o">==</span> <span class="mi">0</span><span class="p">,</span> <span class="s">&quot;a min element position is 0.&quot;</span><span class="p">);</span>
<span class="n">static_assert</span><span class="p">(</span><span class="n">result</span><span class="p">.</span><span class="n">second</span> <span class="o">-</span> <span class="n">begin</span><span class="p">(</span><span class="n">input</span><span class="p">)</span> <span class="o">==</span> <span class="mi">9</span><span class="p">,</span> <span class="s">&quot;a max element position is 9.&quot;</span><span class="p">);</span>
</pre></div>
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<div class="section" id="complexity">
<h2>Complexity<a class="headerlink" href="#complexity" title="Permalink to this headline"></a></h2>
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<div class="line">At most <tt class="docutils literal"><span class="pre">max(floor((3/2)*(N</span> <span class="pre">-</span> <span class="pre">1)),</span> <span class="pre">0)</span></tt> applications of the corresponding predicate, where N is <tt class="docutils literal"><span class="pre">distance(first,</span> <span class="pre">last)</span></tt>.</div>
<div class="line">Recursive function invocations in <em>O(logN)</em> (logarithmic) depth.</div>
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<h2>Header<a class="headerlink" href="#header" title="Permalink to this headline"></a></h2>
<div class="line-block">
<div class="line"><tt class="docutils literal"><span class="pre">sprout/algorithm/minmax_element.hpp</span></tt></div>
<div class="line">Convenience header: <tt class="docutils literal"><span class="pre">sprout/algorithm.hpp</span></tt></div>
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<li><a class="reference external" href="#">minmax_element</a><ul>
<li><a class="reference external" href="#interface">Interface</a></li>
<li><a class="reference external" href="#returns">Returns</a></li>
<li><a class="reference external" href="#examples">Examples</a></li>
<li><a class="reference external" href="#complexity">Complexity</a></li>
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