<div dir="ltr"><div><div>Hi everyone,<br></div><br></div><div>The statechart search for
 an event handler in post-order (children first then parent), however 
when we have orthogonal states involved then the behaviour I am 
experiencing is different.<br></div><br>Let say we have an state X with 
two children [orthogonal] states Y and W. Assuming none of the handlers 
discard (or defer) an event, the handler for that event is called in the
 following order: Y, X, W, X. Note that the handler of X is called twice. The following code demonstrates the issue:<br><br><div>&lt;code&gt;<br>struct EvTest : sc::event&lt; EvTest &gt; {};<br><br>struct Test;<br>struct Inner1;<br>struct Inner2;<br><br>struct Machine : sc::state_machine&lt; Machine, Test &gt; {};<br><br>struct Test : sc::simple_state&lt;Test, Machine, mpl::list&lt;Inner1, Inner2&gt; &gt;{<br>  typedef sc::custom_reaction&lt; EvTest &gt; reactions;<br><br>  sc::result react( const EvTest){<br>    std::cout &lt;&lt; &quot;Test&quot; &lt;&lt; std::endl;<br>//    return discard_event();<br>    return forward_event();<br>  }<br>};<br><br>struct Inner1 : sc::simple_state&lt;Inner1, Test::orthogonal&lt; 0 &gt; &gt;{};<br><br>struct Inner2 : sc::simple_state&lt;Inner2, Test::orthogonal&lt; 1 &gt; &gt;{<br>  typedef sc::custom_reaction&lt; EvTest &gt; reactions;<br><br>  sc::result react( const EvTest){<br>    std::cout &lt;&lt; &quot;Inner2&quot; &lt;&lt; std::endl;<br>    return forward_event();<br>  }<br>};<br></div>&lt;/code&gt;<br><br><div>When the event &quot;EvTest&quot; is received, the output I am getting is:<br><br></div><div>&lt;output&gt;<br></div><div>Test<br></div><div>Inner2<br></div><div>Test<br></div>&lt;/output&gt;<br><br>If there something that I am missing?<br><div><br></div>Best,<br>Ernesto Rodriguez Reina<br><div><div class="gmail_signature"><br></div></div>
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