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<title>Requirements on parallel_scan body</title>
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<h1><a class="anchor" name="parallel_scan_body_req">Requirements on parallel_scan body</a></h1>Class <code>Body</code> implementing the concept of parallel_reduce body must define: -<div class="fragment"><pre class="fragment"> Body::Body( Body&, split );
</pre></div> Splitting constructor. Split <code>b</code> so that <code>this</code> and <code>b</code> can accumulate separately -<div class="fragment"><pre class="fragment"> Body::~Body();
</pre></div> Destructor -<div class="fragment"><pre class="fragment"> <span class="keywordtype">void</span> Body::operator()( <span class="keyword">const</span> Range& r, pre_scan_tag );
</pre></div> Preprocess iterations for range <code>r</code> -<div class="fragment"><pre class="fragment"> <span class="keywordtype">void</span> Body::operator()( <span class="keyword">const</span> Range& r, final_scan_tag );
</pre></div> Do final processing for iterations of range <code>r</code> -<div class="fragment"><pre class="fragment"> <span class="keywordtype">void</span> Body::reverse_join( Body& a );
</pre></div> Merge preprocessing state of <code>a</code> into <code>this</code>, where <code>a</code> was created earlier from <code>b</code> by b's splitting constructor <hr>
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