Following code can NOT be compiled successfully,  according the comment in boost source code I note that the compiler complains the outer state does not have inner state. I want to know how to indicate one state have a inner state, if it didn&#39;t have a initial state? Thanks!<div>

<br></div><div><div>#include &lt;boost/statechart/state_machine.hpp&gt; </div><div>#include &lt;boost/statechart/state.hpp&gt;</div><div>namespace fsm = boost::statechart;</div><div>class HandlingFileState;</div><div>class PlayerFsm : public fsm::state_machine&lt; PlayerFsm,  HandlingFileState &gt;</div>

<div>{};</div><div><br></div><div>class HandlingFileState: public fsm::state&lt; HandlingFileState, PlayerFsm/*, PlayingState*/&gt;</div><div>//if the initial state is uncoment, it can be compiled success. But I don&#39;t want this.</div>

<div>{};</div><div><br></div><div>class NormalPlayingState;</div><div>class PlayingState: public fsm::state&lt; PlayingState, HandlingFileState, NormalPlayingState &gt;</div><div>{};</div><div><br></div><div>class NormalPlayingState: public fsm::state&lt; NormalPlayingState, PlayingState&gt;</div>

<div>{};</div><div><br></div><div>int main()</div><div>{</div><div>    PlayerFsm fsm;</div><div>}</div></div><div><br></div><div><br></div><div><br></div><div><div>------ Build started: Project: TestFsm, Configuration: Debug Win32 ------</div>

<div>Compiling...</div><div>test_fsm.cpp</div><div>d:\3rd_lib\boost_1_46_1\include\boost-1_46_1\boost\statechart\simple_state.hpp(387) : error C2027: use of undefined type &#39;boost::STATIC_ASSERTION_FAILURE&lt;x&gt;&#39;</div>

<div>        with</div><div>        [</div><div>            x=false</div><div>        ]</div><div>        d:\3rd_lib\boost_1_46_1\include\boost-1_46_1\boost\statechart\state.hpp(30) : see reference to class template instantiation &#39;boost::statechart::simple_state&lt;MostDerived,Context,InnerInitial,historyMode&gt;&#39; being compiled</div>

<div>        with</div><div>        [</div><div>            MostDerived=PlayingState,</div><div>            Context=HandlingFileState,</div><div>            InnerInitial=NormalPlayingState,</div><div>            historyMode=has_no_history</div>

<div>        ]</div><div>        d:\bzhu\code\trunk\testfsm\test_fsm.cpp(16) : see reference to class template instantiation &#39;boost::statechart::state&lt;MostDerived,Context,InnerInitial&gt;&#39; being compiled</div>
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        with</div><div>        [</div><div>            MostDerived=PlayingState,</div><div>            Context=HandlingFileState,</div><div>            InnerInitial=NormalPlayingState</div><div>        ]</div><div>Build log was saved at &quot;file://d:\bzhu\Code\trunk\TestFsm\Debug\BuildLog.htm&quot;</div>

<div>TestFsm - 1 error(s), 0 warning(s)</div><div>========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========</div></div><div><br></div><div><br></div><div>and the first error point to :</div><div><div>    </div>

<div>    // If you receive a</div><div>    // &quot;use of undefined type &#39;boost::STATIC_ASSERTION_FAILURE&lt;x&gt;&#39;&quot; or similar</div><div>    // compiler error here then either this state resides in a non-existent</div>

<div>    // orthogonal region of the outer state or the outer state does not have</div><div>    // inner states.</div><div>    BOOST_STATIC_ASSERT( ( mpl::less&lt;</div><div>      orthogonal_position,</div><div>      typename context_type::no_of_orthogonal_regions &gt;::value ) );</div>

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