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<title>Front-end</title><link rel="stylesheet" href="boostbook.css" type="text/css"><meta name="generator" content="DocBook XSL-NS Stylesheets V1.75.2"><link rel="home" href="index.html" title="Meta State Machine (MSM)"><link rel="up" href="pt02.html" title="Part&nbsp;II.&nbsp;Reference"><link rel="prev" href="re02.html" title="Back-end"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Front-end</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re02.html">Prev</a>&nbsp;</td><th width="60%" align="center">Part&nbsp;II.&nbsp;Reference</th><td width="20%" align="right">&nbsp;</td></tr></table><hr></div><div class="refentry" title="Front-end"><a name="d0e5639"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>Front-end &#8212; The front-end headers</p></div><div class="refsect1" title="msm/front/common_states.hpp"><a name="d0e5645"></a><h2>msm/front/common_states.hpp</h2><p>This header contains the predefined types to serve as base for states or state machines:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>default_base_state: non-polymorphic empty type.</p></li><li class="listitem"><p>polymorphic_state: type with a virtual destructor, which makes all
states polymorphic.</p></li></ul></div></div><div class="refsect1" title="msm/front/completion_event.hpp"><a name="d0e5657"></a><h2>msm/front/completion_event.hpp</h2><p>This header contains one type, <code class="code">none</code>. This type has several
meanings inside a transition table:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>as action or guard: that there is no action or guard</p></li><li class="listitem"><p>as target state: that the transition is an internal
transition</p></li><li class="listitem"><p>as event: the transition is an anonymous (completion)
transition</p></li></ul></div></div><div class="refsect1" title="msm/front/functor_row.hpp"><a name="d0e5675"></a><h2>msm/front/functor_row.hpp</h2><p>This header implements the functor front-end's transitions and helpers.</p><div class="refsect2" title="Row"><a name="d0e5680"></a><h3>Row</h3><div class="refsect3" title="definition"><a name="d0e5683"></a><h4>definition</h4><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template &lt;class Source,class Event,class Target,class
Action,class Guard&gt; Row</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="tags"><a name="d0e5690"></a><h4>tags</h4><p>row_type_tag is defined differently for every specialization:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>all 5 template parameters means a normal transition with
action and guard: <code class="code">typedef row_tag
row_type_tag;</code></p></li><li class="listitem"><p>Row&lt;Source,Event,Target,none,none&gt; a normal transition
without action or guard: <code class="code">typedef _row_tag
row_type_tag;</code></p></li><li class="listitem"><p>Row&lt;Source,Event,Target,Action,none&gt; a normal
transition without guard: <code class="code">typedef a_row_tag
row_type_tag;</code></p></li><li class="listitem"><p>Row&lt;Source,Event,Target,none,Guard&gt; a normal transition
without action: <code class="code">typedef g_row_tag
row_type_tag;</code></p></li><li class="listitem"><p>Row&lt;Source,Event,none,Action,none&gt; an internal
transition without guard: <code class="code">typedef a_irow_tag
row_type_tag;</code></p></li><li class="listitem"><p>Row&lt;Source,Event,none,none,Guard&gt; an internal
transition without action: <code class="code">typedef g_irow_tag
row_type_tag;</code></p></li><li class="listitem"><p>Row&lt;Source,Event,none,none,Guard&gt; an internal
transition with action and guard: <code class="code">typedef irow_tag
row_type_tag;</code></p></li><li class="listitem"><p>Row&lt;Source,Event,none,none,none&gt; an internal transition
without action or guard: <code class="code">typedef _irow_tag
row_type_tag;</code></p></li></ul></div></div><div class="refsect3" title="methods"><a name="d0e5736"></a><h4>methods</h4><p>Like any other front-end, Row implements the two necessary static
functions for action and guard call. Each function receives as parameter
the (deepest-level) state machine processsing the event, the event
itself, the source and target states and all the states contained in a
state machine.</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class Fsm,class SourceState,class TargetState,
class AllStates&gt; static void action_call(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>
<code>(</code>Fsm&amp; fsm,Event const&amp;
evt,SourceState&amp;,TargetState,AllStates&amp;<code>)</code>
</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class Fsm,class SourceState,class TargetState,
class AllStates&gt; static bool guard_call(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>
<code>(</code>Fsm&amp; fsm,Event const&amp;
evt,SourceState&amp;,TargetState,AllStates&amp;<code>)</code>
</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div></div></div><div class="refsect2" title="Internal"><a name="d0e5759"></a><h3>Internal</h3><div class="refsect3" title="definition"><a name="d0e5762"></a><h4>definition</h4><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template &lt;class Event,class Action,class Guard&gt;
Internal</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="tags"><a name="d0e5769"></a><h4>tags</h4><p>row_type_tag is defined differently for every specialization:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>all 3 template parameters means an internal transition
with action and guard: <code class="code">typedef sm_i_row_tag
row_type_tag;</code></p></li><li class="listitem"><p>Internal&lt;Event,none,none&gt; an internal transition
without action or guard: <code class="code">typedef sm__i_row_tag
row_type_tag;</code></p></li><li class="listitem"><p>Internal&lt;Event,Action,none&gt; an internal transition
without guard: <code class="code">typedef sm_a_i_row_tag
row_type_tag;</code></p></li><li class="listitem"><p>Internal&lt;Event,none,Guard&gt; an internal transition
without action: <code class="code">typedef sm_g_i_row_tag
row_type_tag;</code></p></li></ul></div></div><div class="refsect3" title="methods"><a name="d0e5795"></a><h4>methods</h4><p>Like any other front-end, Internal implements the two necessary static
functions for action and guard call. Each function receives as parameter
the (deepest-level) state machine processsing the event, the event
itself, the source and target states and all the states contained in a
state machine.</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class Fsm,class SourceState,class TargetState,
class AllStates&gt; static void action_call(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>
<code>(</code>Fsm&amp; fsm,Event const&amp;
evt,SourceState&amp;,TargetState,AllStates&amp;<code>)</code>
</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class Fsm,class SourceState,class TargetState,
class AllStates&gt; static bool guard_call(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>
<code>(</code>Fsm&amp; fsm,Event const&amp;
evt,SourceState&amp;,TargetState,AllStates&amp;<code>)</code>
</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div></div></div><div class="refsect2" title="ActionSequence_"><a name="d0e5818"></a><h3>ActionSequence_</h3><p>This functor calls every element of the template Sequence (which are also
callable functors) in turn. It is also the underlying implementation of the
eUML sequence grammar (action1,action2,...).</p><div class="refsect3" title="definition"><a name="d0e5823"></a><h4>definition</h4><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template &lt;class Sequence&gt; ActionSequence_</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="methods"><a name="d0e5830"></a><h4>methods</h4><p>This helper functor is made for use in a transition table and in a
state behavior and therefore implements an operator() with 3 and with 4
arguments:</p><p>
</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class Evt,class Fsm,class
SourceState,class TargetState&gt; operator()(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Evt const&amp; ,Fsm&amp; ,SourceState&amp;
,TargetState&amp; </code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>
</p><p>
</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class Evt,class Fsm,class State&gt;
operator()(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Evt const&amp;, Fsm&amp;, State&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>
</p></div></div><div class="refsect2" title="Defer"><a name="d0e5853"></a><h3>Defer</h3><div class="refsect3" title="definition"><a name="d0e5856"></a><h4>definition</h4><pre class="classsynopsis"> <span class="ooclass"><span class="classname">Defer</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="methods"><a name="d0e5863"></a><h4>methods</h4><p>This helper functor is made for use in a transition table and
therefore implements an operator() with 4 arguments:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class Evt,class Fsm,class SourceState,class
TargetState&gt; operator()(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Evt const&amp;, Fsm&amp; , SourceState&amp;,
TargetState&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div></div></div></div><div class="refsect1" title="msm/front/internal_row.hpp"><a name="d0e5874"></a><h2>msm/front/internal_row.hpp</h2><p>This header implements the internal transition rows for use inside an
internal_transition_table. All these row types have no source or target state,
as the backend will recognize internal transitions from this
internal_transition_table.</p><div class="refsect2" title="methods"><a name="d0e5879"></a><h3>methods</h3><p>Like any other front-end, the following transition row types implements
the two necessary static functions for action and guard call. Each function
receives as parameter the (deepest-level) state machine processsing the
event, the event itself, the source and target states and all the states
contained in a state machine.</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class Fsm,class SourceState,class TargetState,
class AllStates&gt; static void action_call(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>
<code>(</code>Fsm&amp; fsm,Event const&amp;
evt,SourceState&amp;,TargetState,AllStates&amp;<code>)</code>
</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class Fsm,class SourceState,class TargetState,
class AllStates&gt; static bool guard_call(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>
<code>(</code>Fsm&amp; fsm,Event const&amp;
evt,SourceState&amp;,TargetState,AllStates&amp;<code>)</code>
</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div></div><div class="refsect2" title="a_internal"><a name="d0e5902"></a><h3>a_internal</h3><div class="refsect3" title="definition"><a name="d0e5905"></a><h4>definition</h4><p>This is an internal transition with an action called during the
transition.</p><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template&lt; class Event, class CalledForAction, void
(CalledForAction::*action)(Event const&amp;)&gt;
a_internal</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="template parameters"><a name="d0e5914"></a><h4>template parameters</h4><p>
</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the internal
transition.</p></li><li class="listitem"><p>CalledForAction: the type on which the action method will
be called. It can be either a state of the containing state
machine or the state machine itself.</p></li><li class="listitem"><p>action: a pointer to the method which CalledForAction
provides.</p></li></ul></div><p>
</p></div></div><div class="refsect2" title="g_internal"><a name="d0e5930"></a><h3>g_internal</h3><p>This is an internal transition with a guard called before the transition
and allowing the transition if returning true.</p><div class="refsect3" title="definition"><a name="d0e5935"></a><h4>definition</h4><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template&lt; class Event, class CalledForGuard, bool
(CalledForGuard::*guard)(Event const&amp;)&gt;
g_internal</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="template parameters"><a name="d0e5942"></a><h4>template parameters</h4><p>
</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the internal
transition.</p></li><li class="listitem"><p>CalledForGuard: the type on which the guard method will be
called. It can be either a state of the containing state
machine or the state machine itself.</p></li><li class="listitem"><p>guard: a pointer to the method which CalledForGuard
provides.</p></li></ul></div><p>
</p></div></div><div class="refsect2" title="internal"><a name="d0e5958"></a><h3>internal</h3><p>This is an internal transition with a guard called before the transition
and allowing the transition if returning true. It also calls an action
called during the transition.</p><div class="refsect3" title="definition"><a name="d0e5963"></a><h4>definition</h4><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template&lt; class Event, class CalledForAction, void
(CalledForAction::*action)(Event const&amp;), class
CalledForGuard, bool (CalledForGuard::*guard)(Event const&amp;)&gt;
internal</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="template parameters"><a name="d0e5970"></a><h4>template parameters</h4><p>
</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the internal transition</p></li><li class="listitem"><p>CalledForAction: the type on which the action method will
be called. It can be either a state of the containing state
machine or the state machine itself.</p></li><li class="listitem"><p>action: a pointer to the method which CalledForAction
provides.</p></li><li class="listitem"><p>CalledForGuard: the type on which the guard method will be
called. It can be either a state of the containing state
machine or the state machine itself.</p></li><li class="listitem"><p>guard: a pointer to the method which CalledForGuard
provides.</p></li></ul></div><p>
</p></div></div><div class="refsect2" title="_internal"><a name="d0e5992"></a><h3>_internal</h3><p>This is an internal transition without action or guard. This is equivalent
to an explicit "ignore event".</p><div class="refsect3" title="definition"><a name="d0e5997"></a><h4>definition</h4><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template&lt; class Event &gt; _internal</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="template parameters"><a name="d0e6004"></a><h4>template parameters</h4><p>
</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the internal
transition.</p></li></ul></div><p>
</p></div></div></div><div class="refsect1" title="msm/front/row2.hpp"><a name="d0e6014"></a><h2>msm/front/row2.hpp</h2><p>This header contains the variants of row2, which are an extension of the
standard row transitions for use in the transition table. They offer the
possibility to define action and guard not only in the state machine, but in any
state of the state machine. They can also be used in internal transition tables
through their irow2 variants.</p><div class="refsect2" title="methods"><a name="d0e6019"></a><h3>methods</h3><p>Like any other front-end, the following transition row types implements
the two necessary static functions for action and guard call. Each function
receives as parameter the (deepest-level) state machine processsing the
event, the event itself, the source and target states and all the states
contained in a state machine.</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class Fsm,class SourceState,class TargetState,
class AllStates&gt; static void action_call(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>
<code>(</code>Fsm&amp; fsm,Event const&amp;
evt,SourceState&amp;,TargetState,AllStates&amp;<code>)</code>
</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class Fsm,class SourceState,class TargetState,
class AllStates&gt; static bool guard_call(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>
<code>(</code>Fsm&amp; fsm,Event const&amp;
evt,SourceState&amp;,TargetState,AllStates&amp;<code>)</code>
</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div></div><div class="refsect2" title="_row2"><a name="d0e6042"></a><h3>_row2</h3><p>This is a transition without action or guard. The state machine only
changes active state.</p><div class="refsect3" title="definition"><a name="d0e6047"></a><h4>definition</h4><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template&lt; class Source, class Event, class Target &gt;
_row2</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="template parameters"><a name="d0e6054"></a><h4>template parameters</h4><p>
</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the transition.</p></li><li class="listitem"><p>Source: the source state of the transition.</p></li><li class="listitem"><p>Target: the target state of the transition.</p></li></ul></div><p>
</p></div></div><div class="refsect2" title="a_row2"><a name="d0e6070"></a><h3>a_row2</h3><p>This is a transition with action and without guard.</p><div class="refsect3" title="definition"><a name="d0e6075"></a><h4>definition</h4><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template&lt; class Source, class Event, class Target,
</span></span>&nbsp;{<br>}</pre><pre class="classsynopsis"> <span class="ooclass"><span class="classname">class CalledForAction, void
(CalledForAction::*action)(Event const&amp;) &gt; _row2</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="template parameters"><a name="d0e6086"></a><h4>template parameters</h4><p>
</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the transition.</p></li><li class="listitem"><p>Source: the source state of the transition.</p></li><li class="listitem"><p>Target: the target state of the transition.</p></li><li class="listitem"><p>CalledForAction: the type on which the action method will
be called. It can be either a state of the containing state
machine or the state machine itself.</p></li><li class="listitem"><p>action: a pointer to the method which CalledForAction
provides.</p></li></ul></div><p>
</p></div></div><div class="refsect2" title="g_row2"><a name="d0e6108"></a><h3>g_row2</h3><p>This is a transition with guard and without action.</p><div class="refsect3" title="definition"><a name="d0e6113"></a><h4>definition</h4><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template&lt; class Source, class Event, class Target,
</span></span>&nbsp;{<br>}</pre><pre class="classsynopsis"> <span class="ooclass"><span class="classname">class CalledForGuard, bool (CalledForGuard::*guard)(Event
const&amp;) &gt; _row2</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="template parameters"><a name="d0e6124"></a><h4>template parameters</h4><p>
</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the transition.</p></li><li class="listitem"><p>Source: the source state of the transition.</p></li><li class="listitem"><p>Target: the target state of the transition.</p></li><li class="listitem"><p>CalledForGuard: the type on which the guard method will be
called. It can be either a state of the containing state
machine or the state machine itself.</p></li><li class="listitem"><p>guard: a pointer to the method which CalledForGuard
provides.</p></li></ul></div><p>
</p></div></div><div class="refsect2" title="row2"><a name="d0e6146"></a><h3>row2</h3><p>This is a transition with guard and action.</p><div class="refsect3" title="definition"><a name="d0e6151"></a><h4>definition</h4><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template&lt; class Source, class Event, class Target,
</span></span>&nbsp;{<br>}</pre><pre class="classsynopsis"> <span class="ooclass"><span class="classname">class CalledForAction, void
(CalledForAction::*action)(Event const&amp;), </span></span>&nbsp;{<br>}</pre><pre class="classsynopsis"> <span class="ooclass"><span class="classname">class CalledForGuard, bool (CalledForGuard::*guard)(Event
const&amp;) &gt; _row2</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="template parameters"><a name="d0e6166"></a><h4>template parameters</h4><p>
</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the transition.</p></li><li class="listitem"><p>Source: the source state of the transition.</p></li><li class="listitem"><p>Target: the target state of the transition.</p></li><li class="listitem"><p>CalledForAction: the type on which the action method will
be called. It can be either a state of the containing state
machine or the state machine itself.</p></li><li class="listitem"><p>action: a pointer to the method which CalledForAction
provides.</p></li><li class="listitem"><p>CalledForGuard: the type on which the guard method will be
called. It can be either a state of the containing state
machine or the state machine itself.</p></li><li class="listitem"><p>guard: a pointer to the method which CalledForGuard
provides.</p></li></ul></div><p>
</p></div></div><div class="refsect2" title="a_irow2"><a name="d0e6194"></a><h3>a_irow2</h3><p>This is an internal transition for use inside a transition table, with
action and without guard.</p><div class="refsect3" title="definition"><a name="d0e6199"></a><h4>definition</h4><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template&lt; class Source, class Event, </span></span>&nbsp;{<br>}</pre><pre class="classsynopsis"> <span class="ooclass"><span class="classname">class CalledForAction, void
(CalledForAction::*action)(Event const&amp;) &gt; _row2</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="template parameters"><a name="d0e6210"></a><h4>template parameters</h4><p>
</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the transition.</p></li><li class="listitem"><p>Source: the source state of the transition.</p></li><li class="listitem"><p>CalledForAction: the type on which the action method will
be called. It can be either a state of the containing state
machine or the state machine itself.</p></li><li class="listitem"><p>action: a pointer to the method which CalledForAction
provides.</p></li></ul></div><p>
</p></div></div><div class="refsect2" title="g_irow2"><a name="d0e6229"></a><h3>g_irow2</h3><p>This is an internal transition for use inside a transition table, with
guard and without action.</p><div class="refsect3" title="definition"><a name="d0e6234"></a><h4>definition</h4><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template&lt; class Source, class Event, </span></span>&nbsp;{<br>}</pre><pre class="classsynopsis"> <span class="ooclass"><span class="classname">class CalledForGuard, bool (CalledForGuard::*guard)(Event
const&amp;) &gt; _row2</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="template parameters"><a name="d0e6245"></a><h4>template parameters</h4><p>
</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the transition.</p></li><li class="listitem"><p>Source: the source state of the transition.</p></li><li class="listitem"><p>CalledForGuard: the type on which the guard method will be
called. It can be either a state of the containing state
machine or the state machine itself.</p></li><li class="listitem"><p>guard: a pointer to the method which CalledForGuard
provides.</p></li></ul></div><p>
</p></div></div><div class="refsect2" title="irow2"><a name="d0e6264"></a><h3>irow2</h3><p>This is an internal transition for use inside a transition table, with
guard and action.</p><div class="refsect3" title="definition"><a name="d0e6269"></a><h4>definition</h4><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template&lt; class Source, class Event, </span></span>&nbsp;{<br>}</pre><pre class="classsynopsis"> <span class="ooclass"><span class="classname">class CalledForAction, void
(CalledForAction::*action)(Event const&amp;), </span></span>&nbsp;{<br>}</pre><pre class="classsynopsis"> <span class="ooclass"><span class="classname">class CalledForGuard, bool (CalledForGuard::*guard)(Event
const&amp;) &gt; _row2</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="template parameters"><a name="d0e6284"></a><h4>template parameters</h4><p>
</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the transition.</p></li><li class="listitem"><p>Source: the source state of the transition.</p></li><li class="listitem"><p>CalledForAction: the type on which the action method will
be called. It can be either a state of the containing state
machine or the state machine itself.</p></li><li class="listitem"><p>action: a pointer to the method which CalledForAction
provides.</p></li><li class="listitem"><p>CalledForGuard: the type on which the guard method will be
called. It can be either a state of the containing state
machine or the state machine itself.</p></li><li class="listitem"><p>guard: a pointer to the method which CalledForGuard
provides.</p></li></ul></div><p>
</p></div></div></div><div class="refsect1" title="msm/front/state_machine_def.hpp"><a name="d0e6309"></a><h2>msm/front/state_machine_def.hpp</h2><p>This header provides the implementation of the <span class="command"><strong><a class="command" href="ch03s02.html#basic-front-end">basic front-end</a></strong></span>. It contains one
type, <code class="code">state_machine_def</code></p><div class="refsect2" title="state_machine_def definition"><a name="d0e6319"></a><h3>state_machine_def definition</h3><p>This type is the basic class for a basic (or possibly any other)
front-end. It provides the standard row types (which includes internal
transitions) and a default implementation of the required methods and
typedefs.</p><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template &lt;class Derived,class BaseState =
default_base_state&gt; state_machine_def</span></span>&nbsp;{<br>}</pre><div class="refsect3" title="typedefs"><a name="d0e6328"></a><h4>typedefs</h4><p>
</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>flag_list: by default, no flag is set in the state
machine</p></li><li class="listitem"><p>deferred_events: by default, no event is deferred.</p></li><li class="listitem"><p>configuration: by default, no configuration customization
is done.</p></li></ul></div><p>
</p></div><div class="refsect3" title="row methods"><a name="d0e6344"></a><h4>row methods</h4><p>Like any other front-end, the following transition row types
implements the two necessary static functions for action and guard call.
Each function receives as parameter the (deepest-level) state machine
processsing the event, the event itself, the source and target states
and all the states contained in a state machine (ignored).</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class Fsm,class SourceState,class TargetState,
class AllStates&gt; static void action_call(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>
<code>(</code>Fsm&amp; fsm,Event const&amp;
evt,SourceState&amp;,TargetState,AllStates&amp;<code>)</code>
</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class Fsm,class SourceState,class TargetState,
class AllStates&gt; static bool guard_call(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>
<code>(</code>Fsm&amp; fsm,Event const&amp;
evt,SourceState&amp;,TargetState,AllStates&amp;<code>)</code>
</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div></div><div class="refsect3" title="a_row"><a name="d0e6367"></a><h4>a_row</h4><p>This is a transition with action and without guard.</p><p><code class="classname">template&lt; class Source, class Event, class Target,
void (Derived::*action)(Event const&amp;) &gt; a_row</code></p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the transition.</p></li><li class="listitem"><p>Source: the source state of the transition.</p></li><li class="listitem"><p>Target: the target state of the transition.</p></li><li class="listitem"><p>action: a pointer to the method provided by the concrete
front-end (represented by <code class="code">Derived</code>).</p></li></ul></div></div><div class="refsect3" title="g_row"><a name="d0e6392"></a><h4>g_row</h4><p>This is a transition with guard and without action.</p><p><code class="classname">template&lt; class Source, class Event, class Target,
bool (Derived::*guard)(Event const&amp;) &gt; g_row</code></p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the transition.</p></li><li class="listitem"><p>Source: the source state of the transition.</p></li><li class="listitem"><p>Target: the target state of the transition.</p></li><li class="listitem"><p>guard: a pointer to the method provided by the concrete
front-end (represented by <code class="code">Derived</code>).</p></li></ul></div></div><div class="refsect3" title="row"><a name="d0e6417"></a><h4>row</h4><p>This is a transition with guard and action.</p><p><code class="classname">template&lt; class Source, class Event, class Target,
void (Derived::*action)(Event const&amp;), bool
(Derived::*guard)(Event const&amp;) &gt; row</code></p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the transition.</p></li><li class="listitem"><p>Source: the source state of the transition.</p></li><li class="listitem"><p>Target: the target state of the transition.</p></li><li class="listitem"><p>action: a pointer to the method provided by the concrete
front-end (represented by <code class="code">Derived</code>).</p></li><li class="listitem"><p>guard: a pointer to the method provided by the concrete
front-end (represented by <code class="code">Derived</code>).</p></li></ul></div></div><div class="refsect3" title="_row"><a name="d0e6448"></a><h4>_row</h4><p>This is a transition without action or guard. The state machine only
changes active state.</p><p><code class="classname">template&lt; class Source, class Event, class Target &gt;
_row</code></p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the transition.</p></li><li class="listitem"><p>Source: the source state of the transition.</p></li><li class="listitem"><p>Target: the target state of the transition.</p></li></ul></div></div><div class="refsect3" title="a_irow"><a name="d0e6467"></a><h4>a_irow</h4><p>This is an internal transition for use inside a transition table, with
action and without guard.</p><p><code class="classname">template&lt; class Source, class Event, void
(Derived::*action)(Event const&amp;) &gt; a_irow</code></p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the transition.</p></li><li class="listitem"><p>Source: the source state of the transition.</p></li><li class="listitem"><p>action: a pointer to the method provided by the concrete
front-end (represented by <code class="code">Derived</code>).</p></li></ul></div></div><div class="refsect3" title="g_irow"><a name="d0e6489"></a><h4>g_irow</h4><p>This is an internal transition for use inside a transition table, with
guard and without action.</p><p><code class="classname">template&lt; class Source, class Event, bool
(Derived::*guard)(Event const&amp;) &gt; g_irow</code></p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the transition.</p></li><li class="listitem"><p>Source: the source state of the transition.</p></li><li class="listitem"><p>guard: a pointer to the method provided by the concrete
front-end (represented by <code class="code">Derived</code>).</p></li></ul></div></div><div class="refsect3" title="irow"><a name="d0e6511"></a><h4>irow</h4><p>This is an internal transition for use inside a transition table, with
guard and action.</p><p><code class="classname">template&lt; class Source, class Event, void
(Derived::*action)(Event const&amp;), bool
(Derived::*guard)(Event const&amp;) &gt; irow</code></p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the transition.</p></li><li class="listitem"><p>Source: the source state of the transition.</p></li><li class="listitem"><p>action: a pointer to the method provided by the concrete
front-end (represented by <code class="code">Derived</code>).</p></li><li class="listitem"><p>guard: a pointer to the method provided by the concrete
front-end (represented by <code class="code">Derived</code>).</p></li></ul></div></div><div class="refsect3" title="_irow"><a name="d0e6539"></a><h4>_irow</h4><p>This is an internal transition without action or guard. As it does
nothing, it means "ignore event".</p><p><code class="classname">template&lt; class Source, class Event &gt;
_irow</code></p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Event: the event triggering the transition.</p></li><li class="listitem"><p>Source: the source state of the transition.</p></li></ul></div></div><div class="refsect3" title="methods"><a name="d0e6555"></a><h4>methods</h4><p><code class="code">state_machine_def</code> provides a default implementation in
case of an event which cannot be processed by a state machine (no
transition found). The implementation is using a
<code class="code">BOOST_ASSERT</code> so that the error will only be noticed in
debug mode. Overwrite this method in your implementation to change the
behavior.</p><p>
</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class Fsm,class Event&gt; static void
no_transition(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>
<code>(</code>Event const&amp; ,Fsm&amp;, int
state<code>)</code>
</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>
</p><p><code class="code">state_machine_def</code> provides a default implementation in
case an exception is thrown by a state (entry/exit) or transition
(action/guard) behavior. The implementation is using a
<code class="code">BOOST_ASSERT</code> so that the error will only be noticed in
debug mode. Overwrite this method in your implementation to change the
behavior. This method will be called only if exception handling is not
deactivated (default) by defining
<code class="code">has_no_message_queue</code>.</p><p>
</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class Fsm,class Event&gt; static void
exception_caught(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>
<code>(</code>Event const&amp; ,Fsm&amp;,
std::exception&amp;<code>)</code>
</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>
</p></div></div></div><div class="refsect1" title="msm/front/states.hpp"><a name="d0e6599"></a><h2>msm/front/states.hpp </h2><p>This header provides the different states (except state machines) for the
basic front-end (or mixed with other front-ends).</p><div class="refsect2" title="types"><a name="d0e6604"></a><h3>types</h3><p>This header provides the following types:</p><div class="refsect3" title="no_sm_ptr"><a name="d0e6609"></a><h4>no_sm_ptr</h4><p>deprecated: default policy for states. It means that states do not
need to save a pointer to their containing state machine.</p></div><div class="refsect3" title="sm_ptr"><a name="d0e6614"></a><h4>sm_ptr</h4><p>deprecated: state policy. It means that states need to save a pointer
to their containing state machine. When seeing this flag, the back-end
will call set_sm_ptr(fsm*) and give itself as argument.</p></div><div class="refsect3" title="state"><a name="d0e6619"></a><h4>state</h4><p>Basic type for simple states. Inherit from this type to define a
simple state. The first argument is needed if you want your state (and
all others used in a concrete state machine) to inherit a basic type for
logging or providing a common behavior.</p><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template&lt;class Base = default_base_state,class
SMPtrPolicy = no_sm_ptr&gt; state</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="terminate_state"><a name="d0e6628"></a><h4>terminate_state</h4><p>Basic type for terminate states. Inherit from this type to define a
terminate state. The first argument is needed if you want your state
(and all others used in a concrete state machine) to inherit a basic
type for logging or providing a common behavior.</p><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template&lt;class Base = default_base_state,class
SMPtrPolicy = no_sm_ptr&gt; terminate_state</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="interrupt_state"><a name="d0e6637"></a><h4>interrupt_state</h4><p>Basic type for interrupt states. Interrupt states prevent any further
event handling until EndInterruptEvent is sent. Inherit from this type
to define a terminate state. The first argument is the name of the event
ending the interrupt. The second argument is needed if you want your
state (and all others used in a concrete state machine) to inherit a
basic type for logging or providing a common behavior.</p><p>The EndInterruptEvent can also be a sequence of events:
mpl::vector&lt;EndInterruptEvent,EndInterruptEvent2&gt;.</p><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template&lt;class EndInterruptEvent,class Base =
default_base_state,</span></span>&nbsp;{<br>}</pre><pre class="classsynopsis"> <span class="ooclass"><span class="classname">class SMPtrPolicy = no_sm_ptr&gt;
interrupt_state</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="explicit_entry"><a name="d0e6652"></a><h4>explicit_entry</h4><p>Inherit from this type <span class="underline">in
addition</span> to the desired state type to enable this state
for direct entering. The template parameter gives the region id of the
state (regions are numbered in the order of the
<code class="code">initial_state</code> typedef).</p><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template &lt;int ZoneIndex=-1&gt; explicit_entry</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="entry_pseudo_state"><a name="d0e6667"></a><h4>entry_pseudo_state</h4><p>Basic type for entry pseudo states. Entry pseudo states are an
predefined entry into a submachine and connect two transitions. The
first argument is the id of the region entered by this state (regions
are numbered in the order of the <code class="code">initial_state</code> typedef).
The second argument is needed if you want your state (and all others
used in a concrete state machine) to inherit a basic type for logging or
providing a common behavior.</p><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template&lt;int RegionIndex=-1,class Base =
default_base_state,</span></span>&nbsp;{<br>}</pre><pre class="classsynopsis"> <span class="ooclass"><span class="classname">class SMPtrPolicy = no_sm_ptr&gt;
entry_pseudo_state</span></span>&nbsp;{<br>}</pre></div><div class="refsect3" title="exit_pseudo_state"><a name="d0e6683"></a><h4>exit_pseudo_state</h4><p>Basic type for exit pseudo states. Exit pseudo states are an
predefined exit from a submachine and connect two transitions. The first
argument is the name of the event which will be "thrown" out of the exit
point. This event does not need to be the same as the one sent by the
inner region but must be convertible from it. The second argument is
needed if you want your state (and all others used in a concrete state
machine) to inherit a basic type for logging or providing a common
behavior.</p><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template&lt;class Event,class Base =
default_base_state,</span></span>&nbsp;{<br>}</pre><pre class="classsynopsis"> <span class="ooclass"><span class="classname">class SMPtrPolicy = no_sm_ptr&gt;
exit_pseudo_state</span></span>&nbsp;{<br>}</pre></div></div></div><div class="refsect1" title="msm/front/euml/euml.hpp"><a name="d0e6696"></a><h2>msm/front/euml/euml.hpp</h2><p>This header includes all of eUML except the STL functors.</p></div><div class="refsect1" title="msm/front/euml/stl.hpp"><a name="d0e6701"></a><h2>msm/front/euml/stl.hpp</h2><p>This header includes all the functors for STL support in eUML. These <span class="command"><strong><a class="command" href="ch11.html#eUML-STL-all">tables</a></strong></span> show a full description.</p></div><div class="refsect1" title="msm/front/euml/algorithm.hpp"><a name="d0e6709"></a><h2>msm/front/euml/algorithm.hpp</h2><p>This header includes all the functors for STL algorithms support in eUML.
These <span class="command"><strong><a class="command" href="ch11.html#eUML-STL-all">tables</a></strong></span> show a full
description.</p></div><div class="refsect1" title="msm/front/euml/iteration.hpp"><a name="d0e6717"></a><h2>msm/front/euml/iteration.hpp</h2><p>This header includes iteration functors for STL support in eUML. This <span class="command"><strong><a class="command" href="ch11.html#eUML-STL-iteration">tables</a></strong></span> shows a full
description.</p></div><div class="refsect1" title="msm/front/euml/querying.hpp"><a name="d0e6725"></a><h2>msm/front/euml/querying.hpp</h2><p>This header includes querying functors for STL support in eUML. This <span class="command"><strong><a class="command" href="ch11.html#eUML-STL-querying">tables</a></strong></span> shows a full
description.</p></div><div class="refsect1" title="msm/front/euml/transformation.hpp"><a name="d0e6733"></a><h2>msm/front/euml/transformation.hpp</h2><p>This header includes transformation functors for STL support in eUML. This
<span class="command"><strong><a class="command" href="ch11.html#eUML-STL-transformation">tables</a></strong></span> shows a full
description.</p></div><div class="refsect1" title="msm/front/euml/container.hpp"><a name="d0e6741"></a><h2>msm/front/euml/container.hpp</h2><p>This header includes container functors for STL support in eUML (functors
calling container methods). This <span class="command"><strong><a class="command" href="ch11.html#eUML-STL-container">tables</a></strong></span> shows a full description. It also provides npos for
strings.</p><div class="refsect2" title="Npos_<container type&gt;"><a name="d0e6749"></a><h3>Npos_&lt;container type&gt;</h3><p>Functor returning npos for transition or state behaviors. Like all
constants, only the functor form exists, so parenthesis are necessary.
Example:</p><p><code class="code">string_find_(event_(m_song),Char_&lt;'S'&gt;(),Size_t_&lt;0&gt;()) !=
Npos_&lt;string&gt;() // compare result of string::find with
npos</code></p></div></div><div class="refsect1" title="msm/front/euml/stt_grammar.hpp"><a name="d0e6757"></a><h2>msm/front/euml/stt_grammar.hpp</h2><p>This header provides the transition table grammars. This includes internal
transition tables.</p><div class="refsect2" title="functions"><a name="d0e6762"></a><h3>functions</h3><div class="refsect3" title="build_stt"><a name="d0e6765"></a><h4>build_stt</h4><p>The function build_stt evaluates the grammar-conform expression as
parameter. It returns a transition table, which is a mpl::vector of
transitions (rows) or, if the expression is ill-formed (does not match
the grammar), the type <code class="code">invalid_type</code>, which will lead to a
compile-time static assertion when this transition table is passed to a
state machine. </p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template&lt;class Expr&gt; [mpl::vector&lt;...&gt; /
msm::front::euml::invalid_type] build_stt(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Expr const&amp; expr</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div></div><div class="refsect3" title="build_internal_stt"><a name="d0e6779"></a><h4>build_internal_stt</h4><p>The function build_internal_stt evaluates the grammar-conform
expression as parameter. It returns a transition table, which is a
mpl::vector of transitions (rows) or, if the expression is ill-formed
(does not match the grammar), the type <code class="code">invalid_type</code>, which
will lead to a compile-time static assertion when this transition table
is passed to a state machine. </p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template&lt;class Expr&gt; [mpl::vector&lt;...&gt; /
msm::front::euml::invalid_type] build_internal_stt(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Expr const&amp; expr</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div></div></div><div class="refsect2" title="grammars"><a name="d0e6793"></a><h3>grammars</h3><div class="refsect3" title="transition table"><a name="d0e6796"></a><h4><span class="command"><strong><a name="reference-stt-grammar"></a>transition
table</strong></span></h4><p>The transition table accepts the following grammar:</p><pre class="programlisting">Stt := Row | (Stt ',' Stt)
Row := (Target '==' (SourcePlusEvent)) /* first syntax*/
| ( (SourcePlusEvent) '==' Target ) /* second syntax*/
| (SourcePlusEvent) /* internal transitions */
SourcePlusEvent := (BuildSource '+' BuildEvent)/* standard transition*/
| (BuildSource) /* anonymous transition */
BuildSource := state_tag | (state_tag '/' Action) | (state_tag '[' Guard ']')
| (state_tag '[' Guard ']' '/' Action)
BuildEvent := event_tag | (event_tag '/' Action) | (event_tag '[' Guard ']')
| (event_tag '[' Guard ']' '/' Action)</pre><p>The grammars Action and Guard are defined in state_grammar.hpp and
guard_grammar.hpp respectively. state_tag and event_tag are inherited
from euml_state (or other state variants) and euml_event respectively.
For example, following declarations are possible:</p><pre class="programlisting">target == source + event [guard] / action,
source + event [guard] / action == target,
source + event [guard] / (action1,action2) == target,
target == source + event [guard] / (action1,action2),
target == source + event,
source + event == target,
target == source + event [guard],
source + event [guard] == target,
target == source + event / action,
source + event /action == target,
source / action == target, /*anonymous transition*/
target == source / action, /*anonymous transition*/
source + event /action, /* internal transition*/</pre></div><div class="refsect3" title="internal transition table"><a name="d0e6808"></a><h4>internal transition table</h4><p>The internal transition table accepts the following grammar:</p><pre class="programlisting">IStt := BuildEvent | (IStt ',' IStt)</pre><p>BuildEvent being defined for both internal and standard transition
tables.</p></div></div></div><div class="refsect1" title="msm/front/euml/guard_grammar.hpp"><a name="d0e6817"></a><h2>msm/front/euml/guard_grammar.hpp</h2><p>This header contains the <code class="code">Guard</code> grammar used in the previous
section. This grammar is long but pretty simple:</p><pre class="programlisting">Guard := action_tag | (Guard '&amp;&amp;' Guard)
| (Guard '||' Guard) | ... /* operators*/
| (if_then_else_(Guard,Guard,Guard)) | (function (Action,...Action))</pre><p>Most C++ operators are supported (address-of is not). With
<code class="code">function</code> is meant any eUML predefined function or any self-made
(using <code class="code">MSM_EUML_METHOD</code> or <code class="code">MSM_EUML_FUNCTION</code>). Action
is a grammar defined in state_grammar.hpp.</p></div><div class="refsect1" title="msm/front/euml/state_grammar.hpp"><a name="d0e6838"></a><h2>msm/front/euml/state_grammar.hpp</h2><p>This header provides the grammar for actions and the different grammars and
functions to build states using eUML.</p><div class="refsect2" title="action grammar"><a name="d0e6843"></a><h3>action grammar</h3><p>Like the guard grammar, this grammar supports relevant C++ operators and
eUML functions:</p><pre class="programlisting">Action := action_tag | (Action '+' Action)
| ('--' Action) | ... /* operators*/
| if_then_else_(Guard,Action,Action) | if_then_(Action)
| while_(Guard,Action)
| do_while_(Guard,Action) | for_(Action,Guard,Action,Action)
| (function(Action,...Action))
ActionSequence := Action | (Action ',' Action)</pre><p>Relevant operators are: ++ (post/pre), -- (post/pre), dereferencing, +
(unary/binary), - (unary/binary), *, /, %, &amp;(bitwise), | (bitwise),
^(bitwise), +=, -=, *=, /=, %=, &lt;&lt;=, &gt;&gt;=, &lt;&lt;, &gt;&gt;, =, [].</p></div><div class="refsect2" title="attributes"><a name="d0e6852"></a><h3>attributes</h3><p>This grammar is used to add attributes to states (or state machines) or
events: It evaluates to a fusion::map. You can use two forms:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p><code class="code">attributes_ &lt;&lt; no_attributes_</code></p></li><li class="listitem"><p><code class="code">attributes_ &lt;&lt; attribute_1 &lt;&lt; ... &lt;&lt;
attribute_n</code></p></li></ul></div><p>Attributes can be of any default-constructible type (fusion
requirement).</p></div><div class="refsect2" title="configure"><a name="d0e6868"></a><h3>configure</h3><p>This grammar also has two forms:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p><code class="code">configure_ &lt;&lt; no_configure_</code></p></li><li class="listitem"><p><code class="code">configure_ &lt;&lt; type_1 &lt;&lt; ... &lt;&lt;
type_n</code></p></li></ul></div><p>This grammar is used to create inside one syntax:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>flags: <code class="code">configure_ &lt;&lt; some_flag</code> where
some_flag inherits from <code class="code">euml_flag&lt;some_flag&gt;</code> or
is defined using BOOST_MSM_EUML_FLAG.</p></li><li class="listitem"><p>deferred events: <code class="code">configure_ &lt;&lt; some_event</code>
where some_event inherits from
<code class="code">euml_event&lt;some_event&gt;</code> or is defined using
BOOST_MSM_EUML_EVENT or
BOOST_MSM_EUML_EVENT_WITH_ATTRIBUTES.</p></li><li class="listitem"><p>configuration (message queue, manual deferring, exception
handling): <code class="code">configure_ &lt;&lt; some_config</code> where
some_config inherits from
<code class="code">euml_config&lt;some_config&gt;</code>. At the moment,
three predefined objects exist (in msm//front/euml/common.hpp):</p><div class="itemizedlist"><ul class="itemizedlist" type="circle"><li class="listitem"><p>no_exception: disable catching exceptions</p></li><li class="listitem"><p>no_msg_queue: disable message queue</p></li><li class="listitem"><p>deferred_events: manually enable handling of
deferred events</p></li></ul></div></li></ul></div></div><div class="refsect2" title="initial states"><a name="d0e6922"></a><h3>initial states</h3><p>The grammar to define initial states for a state machine is: <code class="code">init_
&lt;&lt; state_1 &lt;&lt; ... &lt;&lt; state_n</code> where
state_1...state_n inherit from euml_state or is defined using
BOOST_MSM_EUML_STATE, BOOST_MSM_EUML_INTERRUPT_STATE,
BOOST_MSM_EUML_TERMINATE_STATE, BOOST_MSM_EUML_EXPLICIT_ENTRY_STATE,
BOOST_MSM_EUML_ENTRY_STATE or BOOST_MSM_EUML_EXIT_STATE.</p></div><div class="refsect2" title="functions"><a name="d0e6930"></a><h3>functions</h3><div class="refsect3" title="build_sm"><a name="d0e6933"></a><h4>build_sm</h4><p>This function has several overloads. The return type is not relevant
to you as only decltype (return type) is what one needs.</p><p>Defines a state machine without entry or exit:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class Stt,class Init&gt;
func_state_machine&lt;...&gt; build_sm(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Stt ,Init</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines a state machine with entry behavior:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class Stt,class Init,class
Expr1&gt; func_state_machine&lt;...&gt; build_sm(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Stt ,Init,Expr1 const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines a state machine with entry and exit behaviors:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class Stt,class Init,class
Expr1, class Expr2&gt; func_state_machine&lt;...&gt;
build_sm(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Stt ,Init,Expr1 const&amp;,Expr2 const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines a state machine with entry, exit behaviors and
attributes:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class Stt,class Init,class
Expr1, class Expr2, class Attributes&gt; func_state_machine&lt;...&gt;
build_sm(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Stt ,Init,Expr1 const&amp;, Expr2 const&amp;, Attributes
const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines a state machine with entry, exit behaviors, attributes and
configuration (deferred events, flags):</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class Stt,class Init,class
Expr1, class Expr2, class Attributes, class Configure&gt;
func_state_machine&lt;...&gt; build_sm(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Stt ,Init,Expr1 const&amp;, Expr2 const&amp;, Attributes
const&amp;, Configure const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines a state machine with entry, exit behaviors, attributes,
configuration (deferred events, flags) and a base state:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class Stt,class Init,class
Expr1, class Expr2, class Attributes, class Configure, class
Base&gt; func_state_machine&lt;...&gt; build_sm(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Stt ,Init,Expr1 const&amp;, Expr2 const&amp;, Attributes
const&amp;, Configure const&amp;, Base</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Notice that this function requires the extra parameter class
StateNameTag to disambiguate state machines having the same parameters
but still being different.</p></div><div class="refsect3" title="build_state"><a name="d0e6988"></a><h4>build_state</h4><p>This function has several overloads. The return type is not relevant
to you as only decltype (return type) is what one needs.</p><p>Defines a simple state without entry or exit:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">func_state&lt;class StateNameTag,...&gt; build_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code></code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines a simple state with entry behavior:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class Expr1&gt;
func_state&lt;...&gt; build_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Expr1 const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines a simple state with entry and exit behaviors:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class Expr1, class Expr2&gt;
func_state&lt;...&gt; build_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Expr1 const&amp;,Expr2 const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines a simple state with entry, exit behaviors and
attributes:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class Expr1, class Expr2,
class Attributes&gt; func_state&lt;...&gt; build_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Expr1 const&amp;, Expr2 const&amp;, Attributes
const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines a simple state with entry, exit behaviors, attributes and
configuration (deferred events, flags):</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class Expr1, class Expr2,
class Attributes, class Configure&gt; func_state&lt;...&gt;
build_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Expr1 const&amp;, Expr2 const&amp;, Attributes const&amp;,
Configure const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines a simple state with entry, exit behaviors, attributes,
configuration (deferred events, flags) and a base state:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class Expr1, class Expr2,
class Attributes, class Configure, class Base&gt;
func_state&lt;...&gt; build_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Expr1 const&amp;, Expr2 const&amp;, Attributes const&amp;,
Configure const&amp;, Base</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Notice that this function requires the extra parameter class
StateNameTag to disambiguate states having the same parameters but still
being different.</p></div><div class="refsect3" title="build_terminate_state"><a name="d0e7042"></a><h4>build_terminate_state</h4><p>This function has the same overloads as build_state.</p></div><div class="refsect3" title="build_interrupt_state"><a name="d0e7047"></a><h4>build_interrupt_state</h4><p>This function has several overloads. The return type is not relevant
to you as only decltype (return type) is what one needs.</p><p>Defines an interrupt state without entry or exit:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class EndInterruptEvent&gt;
func_state&lt;...&gt; build_interrupt_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>EndInterruptEvent const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines an interrupt state with entry behavior:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class
EndInterruptEvent,class Expr1&gt; func_state&lt;...&gt;
build_interrupt_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>EndInterruptEvent const&amp;,Expr1 const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines an interrupt state with entry and exit behaviors:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class
EndInterruptEvent,class Expr1, class Expr2&gt; func_state&lt;...&gt;
build_interrupt_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>EndInterruptEvent const&amp;,Expr1 const&amp;,Expr2
const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines an interrupt state with entry, exit behaviors and
attributes:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class
EndInterruptEvent,class Expr1, class Expr2, class Attributes&gt;
func_state&lt;...&gt; build_interrupt_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>EndInterruptEvent const&amp;,Expr1 const&amp;, Expr2
const&amp;, Attributes const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines an interrupt state with entry, exit behaviors, attributes and
configuration (deferred events, flags):</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class
EndInterruptEvent,class Expr1, class Expr2, class Attributes,
class Configure&gt; func_state&lt;...&gt;
build_interrupt_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>EndInterruptEvent const&amp;,Expr1 const&amp;, Expr2
const&amp;, Attributes const&amp;, Configure
const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines an interrupt state with entry, exit behaviors, attributes,
configuration (deferred events, flags) and a base state:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class
EndInterruptEvent,class Expr1, class Expr2, class Attributes,
class Configure, class Base&gt; func_state&lt;...&gt;
build_interrupt_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>EndInterruptEvent const&amp;,Expr1 const&amp;, Expr2
const&amp;, Attributes const&amp;, Configure const&amp;,
Base</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Notice that this function requires the extra parameter class
StateNameTag to disambiguate states having the same parameters but still
being different.</p></div><div class="refsect3" title="build_entry_state"><a name="d0e7102"></a><h4>build_entry_state</h4><p>This function has several overloads. The return type is not relevant
to you as only decltype (return type) is what one needs.</p><p>Defines an entry pseudo state without entry or exit:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,int RegionIndex&gt;
entry_func_state&lt;...&gt; build_entry_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code></code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines an entry pseudo state with entry behavior:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,int RegionIndex,class
Expr1&gt; entry_func_state&lt;...&gt; build_entry_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Expr1 const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines an entry pseudo state with entry and exit behaviors:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,int RegionIndex,class
Expr1, class Expr2&gt; entry_func_state&lt;...&gt;
build_entry_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Expr1 const&amp;,Expr2 const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines an entry pseudo state with entry, exit behaviors and
attributes:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,int RegionIndex,class
Expr1, class Expr2, class Attributes&gt; entry_func_state&lt;...&gt;
build_entry_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Expr1 const&amp;, Expr2 const&amp;, Attributes
const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines an entry pseudo state with entry, exit behaviors, attributes
and configuration (deferred events, flags):</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,int RegionIndex,class
Expr1, class Expr2, class Attributes, class Configure&gt;
entry_func_state&lt;...&gt; build_entry_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Expr1 const&amp;, Expr2 const&amp;, Attributes const&amp;,
Configure const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines an entry pseudo state with entry, exit behaviors, attributes,
configuration (deferred events, flags) and a base state:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,int RegionIndex,class
Expr1, class Expr2, class Attributes, class Configure, class
Base&gt; entry_func_state&lt;...&gt; build_entry_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Expr1 const&amp;, Expr2 const&amp;, Attributes const&amp;,
Configure const&amp;, Base</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Notice that this function requires the extra parameter class
StateNameTag to disambiguate states having the same parameters but still
being different.</p></div><div class="refsect3" title="build_exit_state"><a name="d0e7156"></a><h4>build_exit_state</h4><p>This function has several overloads. The return type is not relevant
to you as only decltype (return type) is what one needs.</p><p>Defines an exit pseudo state without entry or exit:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class Event&gt;
exit_func_state&lt;...&gt; build_exit_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Event const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines an exit pseudo state with entry behavior:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class Event,class Expr1&gt;
exit_func_state&lt;...&gt; build_exit_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Event const&amp;,Expr1 const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines an exit pseudo state with entry and exit behaviors:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class Event,class Expr1,
class Expr2&gt; exit_func_state&lt;...&gt; build_exit_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Event const&amp;,Expr1 const&amp;,Expr2
const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines an exit pseudo state with entry, exit behaviors and
attributes:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class Event,class Expr1,
class Expr2, class Attributes&gt; exit_func_state&lt;...&gt;
build_exit_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Event const&amp;,Expr1 const&amp;, Expr2 const&amp;,
Attributes const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines an exit pseudo state with entry, exit behaviors, attributes
and configuration (deferred events, flags):</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class Event,class Expr1,
class Expr2, class Attributes, class Configure&gt;
exit_func_state&lt;...&gt; build_exit_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Event const&amp;,Expr1 const&amp;, Expr2 const&amp;,
Attributes const&amp;, Configure const&amp;</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Defines an exit pseudo state with entry, exit behaviors, attributes,
configuration (deferred events, flags) and a base state:</p><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">template &lt;class StateNameTag,class Event,class Expr1,
class Expr2, class Attributes, class Configure, class Base&gt;
exit_func_state&lt;...&gt; build_exit_state(</code></td><td><code>)</code>;</td><td>&nbsp;</td></tr></table><div class="paramdef-list"><code>Event const&amp;,Expr1 const&amp;, Expr2 const&amp;,
Attributes const&amp;, Configure const&amp;, Base</code>;</div><div class="funcprototype-spacer">&nbsp;</div></div><p>Notice that this function requires the extra parameter class
StateNameTag to disambiguate states having the same parameters but still
being different.</p></div><div class="refsect3" title="build_explicit_entry_state"><a name="d0e7211"></a><h4>build_explicit_entry_state</h4><p>This function has the same overloads as build_entry_state and
explicit_entry_func_state as return type.</p></div></div></div><div class="refsect1" title="msm/front/euml/common.hpp"><a name="d0e7216"></a><h2>msm/front/euml/common.hpp</h2><div class="refsect2" title="types"><a name="d0e7219"></a><h3>types</h3><div class="refsect3" title="euml_event"><a name="d0e7222"></a><h4>euml_event</h4><p>The basic type for events with eUML.</p><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template &lt;class EventName&gt; euml_event;</span></span>&nbsp;{<br>}</pre><pre class="programlisting">struct play : euml_event&lt;play&gt;{};</pre></div><div class="refsect3" title="euml_state"><a name="d0e7233"></a><h4>euml_state</h4><p>The basic type for states with eUML. You will usually not use this
type directly as it is easier to use BOOST_MSM_EUML_STATE,
BOOST_MSM_EUML_INTERRUPT_STATE, BOOST_MSM_EUML_TERMINATE_STATE,
BOOST_MSM_EUML_EXPLICIT_ENTRY_STATE, BOOST_MSM_EUML_ENTRY_STATE or
BOOST_MSM_EUML_EXIT_STATE.</p><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template &lt;class StateName&gt; euml_state;</span></span>&nbsp;{<br>}</pre><p>You can however use this type directly if you want to provide your
state with extra functions or provide entry or exit behaviors without
functors, for example:</p><pre class="programlisting">struct Empty : public msm::front::state&lt;&gt; , public euml_state&lt;Empty&gt;
{
void foo() {...}
template &lt;class Event,class Fsm&gt;
void on_entry(Event const&amp; evt,Fsm&amp; fsm){...}
};</pre></div><div class="refsect3" title="euml_flag"><a name="d0e7246"></a><h4>euml_flag</h4><p>The basic type for flags with eUML.</p><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template &lt;class FlagName&gt; euml_flag;</span></span>&nbsp;{<br>}</pre><pre class="programlisting">struct PlayingPaused: euml_flag&lt;PlayingPaused&gt;{};</pre></div><div class="refsect3" title="euml_action"><a name="d0e7257"></a><h4>euml_action</h4><p>The basic type for state or transition behaviors and guards with
eUML.</p><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template &lt;class AcionName&gt; euml_action;</span></span>&nbsp;{<br>}</pre><pre class="programlisting">struct close_drawer : euml_action&lt;close_drawer&gt;
{
template &lt;class Fsm,class Evt,class SourceState,class TargetState&gt;
void operator()(Evt const&amp; , Fsm&amp;, SourceState&amp; ,TargetState&amp; ) {...}
};</pre><p>Or, as state entry or exit behavior:</p><pre class="programlisting">struct Playing_Entry : euml_action&lt;Playing_Entry&gt;
{
template &lt;class Event,class Fsm,class State&gt;
void operator()(Event const&amp;,Fsm&amp; fsm,State&amp; ){...}
};</pre></div><div class="refsect3" title="euml_config"><a name="d0e7272"></a><h4>euml_config</h4><p>The basic type for configuration possibilities with eUML.</p><pre class="classsynopsis"> <span class="ooclass"><span class="classname">template &lt;class ConfigName&gt; euml_config;</span></span>&nbsp;{<br>}</pre><p>You normally do not use this type directly but instead the instances
of predefined configuration:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>no_exception: disable catching exceptions</p></li><li class="listitem"><p>no_msg_queue: disable message queue. The message queue
allows you to send an event for procesing while in an event
processing.</p></li><li class="listitem"><p>deferred_events: manually enable handling of deferred
events</p></li></ul></div></div><div class="refsect3" title="invalid_type"><a name="d0e7293"></a><h4>invalid_type</h4><p>Type returned by grammar parsers if the grammar is invalid. Seeing
this type will result in a static assertion.</p></div><div class="refsect3" title="no_action"><a name="d0e7298"></a><h4>no_action</h4><p>Placeholder type for use in entry/exit or transition behaviors, which
does absolutely nothing.</p></div><div class="refsect3" title="source_"><a name="d0e7303"></a><h4>source_</h4><p>Generic object or function for the source state of a given transition:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>as object: returns by reference the source state of a
transition, usually to be used by another function (usually
one created by MSM_EUML_METHOD or MSM_EUML_FUNCTION).</p><p>Example:
</p><pre class="programlisting">some_user_function_(source_)</pre></li><li class="listitem"><p>as function: returns by reference the attribute passed as
parameter.</p><p>Example:
</p><pre class="programlisting">source_(m_counter)++</pre></li></ul></div></div><div class="refsect3" title="target_"><a name="d0e7323"></a><h4>target_</h4><p>Generic object or function for the target state of a given transition:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>as object: returns by reference the target state of a
transition, usually to be used by another function (usually
one created by MSM_EUML_METHOD or MSM_EUML_FUNCTION).</p><p>Example:
</p><pre class="programlisting">some_user_function_(target_)</pre></li><li class="listitem"><p>as function: returns by reference the attribute passed as
parameter.</p><p>Example:
</p><pre class="programlisting">target_(m_counter)++</pre></li></ul></div></div><div class="refsect3" title="state_"><a name="d0e7343"></a><h4>state_</h4><p>Generic object or function for the state of a given entry / exit
behavior. state_ means source_ while in the context of an exit behavior
and target_ in the context of an entry behavior:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>as object: returns by reference the current state, usually
to be used by another function (usually one created by
MSM_EUML_METHOD or MSM_EUML_FUNCTION).</p><p>Example:
</p><pre class="programlisting">some_user_function_(state_) // calls some_user_function on the current state</pre></li><li class="listitem"><p>as function: returns by reference the attribute passed as
parameter.</p><p>Example:
</p><pre class="programlisting">state_(m_counter)++</pre></li></ul></div></div><div class="refsect3" title="event_"><a name="d0e7363"></a><h4>event_</h4><p>Generic object or function for the event triggering a given transition
(valid in a transition behavior, as well as in state entry/exit behaviors):</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>as object: returns by reference the event of a transition,
usually to be used by another function (usually one created
by MSM_EUML_METHOD or MSM_EUML_FUNCTION).</p><p>Example:
</p><pre class="programlisting">some_user_function_(event_)</pre></li><li class="listitem"><p>as function: returns by reference the attribute passed as
parameter.</p><p>Example:
</p><pre class="programlisting">event_(m_counter)++</pre></li></ul></div></div><div class="refsect3" title="fsm_"><a name="d0e7383"></a><h4>fsm_</h4><p>Generic object or function for the state machine containing a given transition:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>as object: returns by reference the event of a transition,
usually to be used by another function (usually one created
by MSM_EUML_METHOD or MSM_EUML_FUNCTION).</p><p>Example:
</p><pre class="programlisting">some_user_function_(fsm_)</pre></li><li class="listitem"><p>as function: returns by reference the attribute passed as
parameter.</p><p>Example:
</p><pre class="programlisting">fsm_(m_counter)++</pre></li></ul></div></div><div class="refsect3" title="substate_"><a name="d0e7403"></a><h4>substate_</h4><p>Generic object or function returning a state of a given state machine:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>with 1 parameter: returns by reference the state passed as
parameter, usually to be used by another function (usually
one created by MSM_EUML_METHOD or MSM_EUML_FUNCTION).</p><p>Example:
</p><pre class="programlisting">some_user_function_(substate_(my_state))</pre></li><li class="listitem"><p>with 2 parameters: returns by reference the state passed
as first parameter from the state machine passed as second
parameter, usually to be used by another function (usually
one created by MSM_EUML_METHOD or MSM_EUML_FUNCTION). This
makes sense when used in combination with attribute_.</p><p>Example (equivalent to the previous example):
</p><pre class="programlisting">some_user_function_(substate_(my_state,fsm_))</pre></li></ul></div></div><div class="refsect3" title="attribute_"><a name="d0e7423"></a><h4>attribute_</h4><p>Generic object or function returning the attribute passed (by name) as
second parameter of the thing passed as first (a state, event or state
machine). Example: </p><p>
</p><pre class="programlisting">attribute_(substate_(my_state),cd_name_attribute)++</pre><p>
</p></div><div class="refsect3" title="True_"><a name="d0e7433"></a><h4>True_</h4><p>Functor returning true for transition or state behaviors. Like all
constants, only the functor form exists, so parenthesis are necessary.
Example:</p><p>
</p><pre class="programlisting">if_then_(True_(),/* some action always called*/)</pre><p>
</p></div><div class="refsect3" title="False_"><a name="d0e7443"></a><h4>False_</h4><p>Functor returning false for transition or state behaviors. Like all
constants, only the functor form exists, so parenthesis are necessary.
Example:</p><p>
</p><pre class="programlisting">if_then_(False_(),/* some action never called */)</pre><p>
</p></div><div class="refsect3" title="Int_<int value&gt;"><a name="d0e7453"></a><h4>Int_&lt;int value&gt;</h4><p>Functor returning an integer value for transition or state behaviors.
Like all constants, only the functor form exists, so parenthesis are
necessary. Example:</p><p>
</p><pre class="programlisting">target_(m_ringing_cpt) = Int_&lt;RINGING_TIME&gt;() // RINGING_TIME is a constant</pre><p>
</p></div><div class="refsect3" title="Char_<char value&gt;"><a name="d0e7463"></a><h4>Char_&lt;char value&gt;</h4><p>Functor returning a char value for transition or state behaviors. Like
all constants, only the functor form exists, so parenthesis are
necessary. Example:</p><p>
</p><pre class="programlisting">// look for 'S' in event.m_song
[string_find_(event_(m_song),Char_&lt;'S'&gt;(),Size_t_&lt;0&gt;()) != Npos_&lt;string&gt;()]</pre><p>
</p></div><div class="refsect3" title="Size_t_<size_t value&gt;"><a name="d0e7473"></a><h4>Size_t_&lt;size_t value&gt;</h4><p>Functor returning a size_t value for transition or state behaviors.
Like all constants, only the functor form exists, so parenthesis are
necessary. Example:</p><p>
</p><pre class="programlisting">substr_(event_(m_song),Size_t_&lt;1&gt;()) // returns a substring of event.m_song</pre><p>
</p></div><div class="refsect3" title="String_ < mpl::string &gt;"><a name="d0e7483"></a><h4>String_ &lt; mpl::string &gt;</h4><p>Functor returning a string for transition or state behaviors. Like all
constants, only the functor form exists, so parenthesis are necessary.
Requires boost &gt;= 1.40 for mpl::string.</p><p>Example:</p><p>
</p><pre class="programlisting">// adds "Let it be" to fsm.m_src_container
push_back_(fsm_(m_src_container), String_&lt;mpl::string&lt;'Let','it ','be'&gt; &gt;())</pre><p>
</p></div><div class="refsect3" title="Predicate_ < some_stl_compatible_functor &gt;"><a name="d0e7495"></a><h4>Predicate_ &lt; some_stl_compatible_functor &gt;</h4><p>This functor eUML-enables a STL functor (for use in an algorithm).
This is necessary because all what is in the transition table must be a
eUML terminal.</p><p>Example:</p><pre class="programlisting">//equivalent to:
//std::accumulate(fsm.m_vec.begin(),fsm.m_vec.end(),1,std::plus&lt;int&gt;())== 1
accumulate_(begin_(fsm_(m_vec)),end_(fsm_(m_vec)),Int_&lt;1&gt;(),
Predicate_&lt;std::plus&lt;int&gt; &gt;()) == Int_&lt;1&gt;())</pre></div><div class="refsect3" title="process_"><a name="d0e7504"></a><h4>process_</h4><p>This function sends an event to up to 4 state machines by calling
<code class="code">process_event</code> on them:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p><code class="code">process_(some_event)</code> : processes an event in
the current (containing) state machine.</p></li><li class="listitem"><p><code class="code">process_(some_event [,fsm1...fsm4] )</code> :
processes the same event in the 1-4 state machines passed as
argument.</p></li></ul></div></div><div class="refsect3" title="process2_"><a name="d0e7523"></a><h4>process2_</h4><p>This function sends an event to up to 3 state machines by calling
<code class="code">process_event</code> on them and copy-constructing the event
from the data passed as second parameter:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p><code class="code">process2_(some_event, some_data)</code> : processes
an event in the current (containing) state machine.</p></li><li class="listitem"><p><code class="code">process2_(some_event, some_data [,fsm1...fsm3]
)</code> : processes the same event in the 1-3 state
machines passed as argument.</p></li></ul></div><p>Example: </p><p>
</p><pre class="programlisting">// processes NotFound on current state machine,
// copy-constructed with event.m_song
process2_(NotFound,event_(m_song))</pre><p>
</p><p>With the following definitions:</p><pre class="programlisting">BOOST_MSM_EUML_DECLARE_ATTRIBUTE(std::string,m_song)//declaration of m_song
NotFound (const string&amp; data) // copy-constructor of NotFound</pre></div><div class="refsect3" title="is_flag_"><a name="d0e7553"></a><h4>is_flag_</h4><p>This function tells if a flag is active by calling
<code class="code">is_flag_active</code> on the current state machine or one
passed as parameter:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p><code class="code">is_flag_(some_flag)</code> : calls
<code class="code">is_flag_active</code> on the current (containing)
state machine.</p></li><li class="listitem"><p><code class="code">is_flag_(some_flag, some_fsm)</code> :calls
<code class="code">is_flag_active</code> on the state machine.passed
as argument.</p></li></ul></div></div><div class="refsect3" title="defer_"><a name="d0e7578"></a><h4>defer_</h4><p>This object defers the current event by calling
<code class="code">defer_event</code> on the current state machine.
Example:</p><pre class="programlisting">Empty() + play() / defer_</pre></div><div class="refsect3" title="explicit_(submachine-name,state-name)"><a name="d0e7588"></a><h4>explicit_(submachine-name,state-name)</h4><p>Used as transition's target, causes an explicit entry into the given
state from the given submachine. Several explicit_ as targets, separated
by commas, means a fork. The state must have been declared as such using
BOOST_MSM_EUML_EXPLICIT_ENTRY_STATE.</p></div><div class="refsect3" title="entry_pt_(submachine-name,state-name)"><a name="d0e7593"></a><h4>entry_pt_(submachine-name,state-name)</h4><p>Used as transition's target from a containing state machine, causes
submachine-name to be entered using the given entry pseudo-state. This
state must have been declared as pseudo entry using
BOOST_MSM_EUML_ENTRY_STATE.</p></div><div class="refsect3" title="exit_pt_(submachine-name,state-name)"><a name="d0e7598"></a><h4>exit_pt_(submachine-name,state-name)</h4><p>Used as transition's source from a containing state machine, causes
submachine-name to be left using the given exit pseudo-state. This state
must have been declared as pseudo exit using
BOOST_MSM_EUML_EXIT_STATE.</p></div><div class="refsect3" title="MSM_EUML_FUNCTION"><a name="d0e7603"></a><h4>MSM_EUML_FUNCTION</h4><p>This macro creates a eUML function and a functor for use with the
functor front-end, based on a free function:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>first parameter: the name of the functor</p></li><li class="listitem"><p>second parameter: the underlying function</p></li><li class="listitem"><p>third parameter: the eUML function name</p></li><li class="listitem"><p>fourth parameter: the return type if used in a transition
behavior</p></li><li class="listitem"><p>fifth parameter: the return type if used in a state
behavior (entry/exit)</p></li></ul></div><p> Note that the function itself can take up to 5
arguments.</p><p>Example:</p><p>
</p><pre class="programlisting">MSM_EUML_FUNCTION(BinarySearch_,std::binary_search,binary_search_,bool,bool)</pre><p>
</p><p>Can be used like:</p><p>
</p><pre class="programlisting">binary_search_(begin_(fsm_(m_var)),end_(fsm_(m_var)),Int_&lt;9&gt;())</pre><p>
</p></div><div class="refsect3" title="MSM_EUML_METHOD"><a name="d0e7639"></a><h4>MSM_EUML_METHOD</h4><p>This macro creates a eUML function and a functor for use with the
functor front-end, based on a method:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>first parameter: the name of the functor</p></li><li class="listitem"><p>second parameter: the underlying function</p></li><li class="listitem"><p>third parameter: the eUML function name</p></li><li class="listitem"><p>fourth parameter: the return type if used in a transition
behavior</p></li><li class="listitem"><p>fifth parameter: the return type if used in a state
behavior (entry/exit)</p></li></ul></div><p> Note that the method itself can take up to 4 arguments
(5 like for a free function - 1 for the object on which the method is
called).</p><p>Example:</p><pre class="programlisting">struct Empty : public msm::front::state&lt;&gt; , public euml_state&lt;Empty&gt;
{
void activate_empty() {std::cout &lt;&lt; "switching to Empty " &lt;&lt; std::endl;}
...
};
MSM_EUML_METHOD(ActivateEmpty_,activate_empty,activate_empty_,void,void)</pre><p>Can be used like:</p><p>
</p><pre class="programlisting">Empty == Open + open_close / (close_drawer , activate_empty_(target_))</pre><p>
</p></div><div class="refsect3" title="BOOST_MSM_EUML_ACTION(action-instance-name)"><a name="d0e7672"></a><h4>BOOST_MSM_EUML_ACTION(action-instance-name)</h4><p>This macro declares a behavior type and a const instance for use in
state or transition behaviors. The action implementation itself follows
the macro declaration, for example:</p><pre class="programlisting">BOOST_MSM_EUML_ACTION(good_disk_format)
{
template &lt;class Fsm,class Evt,class SourceState,class TargetState&gt;
void/bool operator()(Evt const&amp; evt,Fsm&amp;,SourceState&amp; ,TargetState&amp; ){...}
};</pre></div><div class="refsect3" title="BOOST_MSM_EUML_FLAG(flag-instance-name)"><a name="d0e7679"></a><h4>BOOST_MSM_EUML_FLAG(flag-instance-name)</h4><p>This macro declares a flag type and a const instance for use in
behaviors.</p></div><div class="refsect3" title="BOOST_MSM_EUML_FLAG_NAME(flag-instance-name)"><a name="d0e7684"></a><h4>BOOST_MSM_EUML_FLAG_NAME(flag-instance-name)</h4><p>This macro returns the name of the flag type generated by
BOOST_MSM_EUML_FLAG. You need this where the type is required (usually
with the back-end method is_flag_active). For example:</p><pre class="programlisting">fsm.is_flag_active&lt;BOOST_MSM_EUML_FLAG_NAME(CDLoaded)&gt;()</pre></div><div class="refsect3" title="BOOST_MSM_EUML_DECLARE_ATTRIBUTE(event-type,event-name)"><a name="d0e7691"></a><h4>BOOST_MSM_EUML_DECLARE_ATTRIBUTE(event-type,event-name)</h4><p>This macro declares an attribute called event-name of type event-type.
This attribute can then be made part of an attribute list using
BOOST_MSM_EUML_ATTRIBUTES.</p></div><div class="refsect3" title="BOOST_MSM_EUML_ATTRIBUTES(attributes-expression,attributes-name)"><a name="d0e7696"></a><h4>BOOST_MSM_EUML_ATTRIBUTES(attributes-expression,attributes-name)</h4><p>This macro declares an attribute list called attributes-name based on
the expression as first argument. These attributes can then be made part
of an event using BOOST_MSM_EUML_EVENT_WITH_ATTRIBUTES, of a state as
3rd parameter of BOOST_MSM_EUML_STATE or of a state machine as 5th
parameter of BOOST_MSM_EUML_DECLARE_STATE_MACHINE.</p><p>Attributes are added using left-shift, for example:</p><pre class="programlisting">// m_song is of type std::string
BOOST_MSM_EUML_DECLARE_ATTRIBUTE(std::string,m_song)
// contains one attribute, m_song
BOOST_MSM_EUML_ATTRIBUTES((attributes_ &lt;&lt; m_song ), FoundDef)</pre></div><div class="refsect3" title="BOOST_MSM_EUML_EVENT(event-instance name)"><a name="d0e7705"></a><h4>BOOST_MSM_EUML_EVENT(event-instance name)</h4><p>This macro defines an event type (event-instance-name_helper) and
declares a const instance of this event type called event-instance-name
for use in a transition table or state behaviors.</p></div><div class="refsect3" title="BOOST_MSM_EUML_EVENT_WITH_ATTRIBUTES(event-instance-name,attributes)"><a name="d0e7710"></a><h4>BOOST_MSM_EUML_EVENT_WITH_ATTRIBUTES(event-instance-name,attributes)</h4><p>This macro defines an event type (event-instance-name_helper) and
declares a const instance of this event type called event-instance-name
for use in a transition table or state behaviors. The event will have as
attributes the ones passed by the second argument:</p><p><code class="code">BOOST_MSM_EUML_EVENT_WITH_ATTRIBUTES(Found,FoundDef)</code>
</p><p>The created event instance supports operator()(attributes) so that
</p><pre class="programlisting">my_back_end.process_event(Found(some_string))</pre><p>
is possible.</p></div><div class="refsect3" title="BOOST_MSM_EUML_EVENT_NAME(event-instance-name)"><a name="d0e7724"></a><h4>BOOST_MSM_EUML_EVENT_NAME(event-instance-name)</h4><p>This macro returns the name of the event type generated by
BOOST_MSM_EUML_EVENT or BOOST_MSM_EUML_EVENT_WITH_ATTRIBUTES. You need
this where the type is required (usually inside a back-end definition).
For example:</p><p>
</p><pre class="programlisting">typedef msm::back::state_machine&lt;Playing_,
msm::back::ShallowHistory&lt;mpl::vector&lt;BOOST_MSM_EUML_EVENT_NAME(end_pause)
&gt; &gt; &gt; Playing_type;</pre><p>
</p></div><div class="refsect3" title="BOOST_MSM_EUML_STATE(build-expression,state-instance-name)"><a name="d0e7734"></a><h4>BOOST_MSM_EUML_STATE(build-expression,state-instance-name)</h4><p>This macro defines a state type (state-instance-name_helper) and
declares a const instance of this state type called state-instance-name
for use in a transition table or state behaviors.</p><p>There are several possibilitites for the expression syntax:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>(): state without entry or exit action.</p></li><li class="listitem"><p>(Expr1): state with entry but no exit action.</p></li><li class="listitem"><p>(Expr1,Expr2): state with entry and exit action.</p></li><li class="listitem"><p>(Expr1,Expr2,Attributes): state with entry and exit
action, defining some attributes.</p></li><li class="listitem"><p>(Expr1,Expr2,Attributes,Configure): state with entry and
exit action, defining some attributes and flags (standard
MSM flags) or deferred events (standard MSM deferred
events).</p></li><li class="listitem"><p>(Expr1,Expr2,Attributes,Configure,Base): state with entry
and exit action, defining some attributes, flags and
deferred events (plain msm deferred events) and a
non-default base state (as defined in standard MSM).</p></li></ul></div></div><div class="refsect3" title="BOOST_MSM_EUML_INTERRUPT_STATE(build-expression,state-instance-name)"><a name="d0e7760"></a><h4>BOOST_MSM_EUML_INTERRUPT_STATE(build-expression,state-instance-name)</h4><p>This macro defines an interrupt state type
(state-instance-name_helper) and declares a const instance of this state
type called state-instance-name for use in a transition table or state
behaviors.</p><p>There are several possibilitites for the expression syntax. In all of
them, the first argument is the name of the event (generated by one of
the previous macros) ending the interrupt:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>(end_interrupt_event): interrupt state without entry or
exit action.</p></li><li class="listitem"><p>(end_interrupt_event,Expr1): interrupt state with entry
but no exit action.</p></li><li class="listitem"><p>(end_interrupt_event,Expr1,Expr2): interrupt state with
entry and exit action.</p></li><li class="listitem"><p>(end_interrupt_event,Expr1,Expr2,Attributes): interrupt
state with entry and exit action, defining some
attributes.</p></li><li class="listitem"><p>(end_interrupt_event,Expr1,Expr2,Attributes,Configure):
interrupt state with entry and exit action, defining some
attributes and flags (standard MSM flags) or deferred events
(standard MSM deferred events).</p></li><li class="listitem"><p>(end_interrupt_event,Expr1,Expr2,Attributes,Configure,Base):
interrupt state with entry and exit action, defining some
attributes, flags and deferred events (plain msm deferred
events) and a non-default base state (as defined in standard
MSM).</p></li></ul></div></div><div class="refsect3" title="BOOST_MSM_EUML_TERMINATE_STATE(build-expression,state-instance-name)"><a name="d0e7786"></a><h4>BOOST_MSM_EUML_TERMINATE_STATE(build-expression,state-instance-name)</h4><p>This macro defines a terminate pseudo-state type
(state-instance-name_helper) and declares a const instance of this state
type called state-instance-name for use in a transition table or state
behaviors.</p><p>There are several possibilitites for the expression syntax:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>(): terminate pseudo-state without entry or exit
action.</p></li><li class="listitem"><p>(Expr1): terminate pseudo-state with entry but no exit
action.</p></li><li class="listitem"><p>(Expr1,Expr2): terminate pseudo-state with entry and exit
action.</p></li><li class="listitem"><p>(Expr1,Expr2,Attributes): terminate pseudo-state with
entry and exit action, defining some attributes.</p></li><li class="listitem"><p>(Expr1,Expr2,Attributes,Configure): terminate pseudo-state
with entry and exit action, defining some attributes and
flags (standard MSM flags) or deferred events (standard MSM
deferred events).</p></li><li class="listitem"><p>(Expr1,Expr2,Attributes,Configure,Base): terminate
pseudo-state with entry and exit action, defining some
attributes, flags and deferred events (plain msm deferred
events) and a non-default base state (as defined in standard
MSM).</p></li></ul></div></div><div class="refsect3" title="BOOST_MSM_EUML_EXIT_STATE(build-expression,state-instance-name)"><a name="d0e7812"></a><h4>BOOST_MSM_EUML_EXIT_STATE(build-expression,state-instance-name)</h4><p>This macro defines an exit pseudo-state type
(state-instance-name_helper) and declares a const instance of this state
type called state-instance-name for use in a transition table or state
behaviors.</p><p>There are several possibilitites for the expression syntax:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>(forwarded_event):exit pseudo-state without entry or exit
action.</p></li><li class="listitem"><p>(forwarded_event,Expr1): exit pseudo-state with entry but
no exit action.</p></li><li class="listitem"><p>(forwarded_event,Expr1,Expr2): exit pseudo-state with
entry and exit action.</p></li><li class="listitem"><p>(forwarded_event,Expr1,Expr2,Attributes): exit
pseudo-state with entry and exit action, defining some
attributes.</p></li><li class="listitem"><p>(forwarded_event,Expr1,Expr2,Attributes,Configure): exit
pseudo-state with entry and exit action, defining some
attributes and flags (standard MSM flags) or deferred events
(standard MSM deferred events).</p></li><li class="listitem"><p>(forwarded_event,Expr1,Expr2,Attributes,Configure,Base):
exit pseudo-state with entry and exit action, defining some
attributes, flags and deferred events (plain msm deferred
events) and a non-default base state (as defined in standard
MSM).</p></li></ul></div><p>Note that the forwarded_event must be constructible from the event
sent by the submachine containing the exit point.</p></div><div class="refsect3" title="BOOST_MSM_EUML_ENTRY_STATE(int region-index,build-expression,state-instance-name)"><a name="d0e7840"></a><h4>BOOST_MSM_EUML_ENTRY_STATE(int
region-index,build-expression,state-instance-name)</h4><p>This macro defines an entry pseudo-state type
(state-instance-name_helper) and declares a const instance of this state
type called state-instance-name for use in a transition table or state
behaviors.</p><p>There are several possibilitites for the expression syntax:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>(): entry pseudo-state without entry or exit
action.</p></li><li class="listitem"><p>(Expr1): entry pseudo-state with entry but no exit
action.</p></li><li class="listitem"><p>(Expr1,Expr2): entry pseudo-state with entry and exit
action.</p></li><li class="listitem"><p>(Expr1,Expr2,Attributes): entry pseudo-state with entry
and exit action, defining some attributes.</p></li><li class="listitem"><p>(Expr1,Expr2,Attributes,Configure): entry pseudo-state
with entry and exit action, defining some attributes and
flags (standard MSM flags) or deferred events (standard MSM
deferred events).</p></li><li class="listitem"><p>(Expr1,Expr2,Attributes,Configure,Base): entry
pseudo-state with entry and exit action, defining some
attributes, flags and deferred events (plain msm deferred
events) and a non-default base state (as defined in standard
MSM).</p></li></ul></div></div><div class="refsect3" title="BOOST_MSM_EUML_EXPLICIT_ENTRY_STATE(int region-index,build-expression,state-instance-name)"><a name="d0e7866"></a><h4>BOOST_MSM_EUML_EXPLICIT_ENTRY_STATE(int
region-index,build-expression,state-instance-name)</h4><p>This macro defines a submachine's substate type
(state-instance-name_helper), which can be explicitly entered and also
declares a const instance of this state type called state-instance-name
for use in a transition table or state behaviors.</p><p>There are several possibilitites for the expression syntax:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>(): state without entry or exit action.</p></li><li class="listitem"><p>(Expr1): state with entry but no exit action.</p></li><li class="listitem"><p>(Expr1,Expr2): state with entry and exit action.</p></li><li class="listitem"><p>(Expr1,Expr2,Attributes): state with entry and exit
action, defining some attributes.</p></li><li class="listitem"><p>(Expr1,Expr2,Attributes,Configure): state with entry and
exit action, defining some attributes and flags (standard
MSM flags) or deferred events (standard MSM deferred
events).</p></li><li class="listitem"><p>(Expr1,Expr2,Attributes,Configure,Base): state with entry
and exit action, defining some attributes, flags and
deferred events (plain msm deferred events) and a
non-default base state (as defined in standard MSM).</p></li></ul></div></div><div class="refsect3" title="BOOST_MSM_EUML_STATE_NAME(state-instance-name)"><a name="d0e7892"></a><h4>BOOST_MSM_EUML_STATE_NAME(state-instance-name)</h4><p>This macro returns the name of the state type generated by
BOOST_MSM_EUML_STATE or other state macros. You need this where the type
is required (usually using a backend function). For example:</p><p>
</p><pre class="programlisting">fsm.get_state&lt;BOOST_MSM_EUML_STATE_NAME(StringFind)&amp;&gt;().some_state_function();</pre><p>
</p></div><div class="refsect3" title="BOOST_MSM_EUML_DECLARE_STATE(build-expression,state-instance-name)"><a name="d0e7902"></a><h4>BOOST_MSM_EUML_DECLARE_STATE(build-expression,state-instance-name)</h4><p>Like BOOST_MSM_EUML_STATE but does not provide an instance, simply a
type declaration.</p></div><div class="refsect3" title="BOOST_MSM_EUML_DECLARE_INTERRUPT_STATE(build-expression,state-instance-name)"><a name="d0e7907"></a><h4>BOOST_MSM_EUML_DECLARE_INTERRUPT_STATE(build-expression,state-instance-name)</h4><p>Like BOOST_MSM_EUML_INTERRUPT_STATE but does not provide an instance,
simply a type declaration.</p></div><div class="refsect3" title="BOOST_MSM_EUML_DECLARE_TERMINATE_STATE(build-expression,state-instance-name)"><a name="d0e7912"></a><h4>BOOST_MSM_EUML_DECLARE_TERMINATE_STATE(build-expression,state-instance-name)</h4><p>Like BOOST_MSM_EUML_TERMINATE_STATE but does not provide an instance,
simply a type declaration.</p></div><div class="refsect3" title="BOOST_MSM_EUML_DECLARE_EXIT_STATE(build-expression,state-instance-name)"><a name="d0e7917"></a><h4>BOOST_MSM_EUML_DECLARE_EXIT_STATE(build-expression,state-instance-name)</h4><p>Like BOOST_MSM_EUML_EXIT_STATE but does not provide an instance,
simply a type declaration.</p></div><div class="refsect3" title="BOOST_MSM_EUML_DECLARE_ENTRY_STATE(int region-index,build-expression,state-instance-name)"><a name="d0e7922"></a><h4>BOOST_MSM_EUML_DECLARE_ENTRY_STATE(int
region-index,build-expression,state-instance-name)</h4><p>Like BOOST_MSM_EUML_ENTRY_STATE but does not provide an instance,
simply a type declaration.</p></div><div class="refsect3" title="BOOST_MSM_EUML_DECLARE_EXPLICIT_ENTRY_STATE(int region-index,build-expression,state-instance-name)"><a name="d0e7927"></a><h4>BOOST_MSM_EUML_DECLARE_EXPLICIT_ENTRY_STATE(int
region-index,build-expression,state-instance-name)</h4><p>Like BOOST_MSM_EUML_EXPLICIT_ENTRY_STATE but does not provide an
instance, simply a type declaration.</p></div><div class="refsect3" title="BOOST_MSM_EUML_TRANSITION_TABLE(expression, table-instance-name)"><a name="d0e7932"></a><h4>BOOST_MSM_EUML_TRANSITION_TABLE(expression,
table-instance-name)</h4><p>This macro declares a transition table type and also declares a const
instance of the table which can then be used in a state machine
declaration (see BOOST_MSM_EUML_DECLARE_STATE_MACHINE).The expression
must follow the <span class="command"><strong><a class="command" href="re03.html#reference-stt-grammar">transition
table grammar</a></strong></span>.</p></div><div class="refsect3" title="BOOST_MSM_EUML_DECLARE_TRANSITION_TABLE(iexpression,table-instance-name)"><a name="d0e7940"></a><h4>BOOST_MSM_EUML_DECLARE_TRANSITION_TABLE(iexpression,table-instance-name)</h4><p>Like BOOST_MSM_EUML_TRANSITION_TABLE but does not provide an instance,
simply a type declaration.</p></div><div class="refsect3" title="BOOST_MSM_EUML_INTERNAL_TRANSITION_TABLE(expression, table-instance-name)"><a name="d0e7945"></a><h4>BOOST_MSM_EUML_INTERNAL_TRANSITION_TABLE(expression,
table-instance-name)</h4><p>This macro declares a transition table type and also declares a const
instance of the table.The expression must follow the <span class="command"><strong><a class="command" href="re03.html#reference-stt-grammar">transition table
grammar</a></strong></span>. For the moment, this macro is not used.</p></div><div class="refsect3" title="BOOST_MSM_EUML_DECLARE_INTERNAL_TRANSITION_TABLE(iexpression,table-instance-name)"><a name="d0e7953"></a><h4>BOOST_MSM_EUML_DECLARE_INTERNAL_TRANSITION_TABLE(iexpression,table-instance-name)</h4><p>Like BOOST_MSM_EUML_TRANSITION_TABLE but does not provide an instance,
simply a type declaration. This is currently the only way to declare an
internal transition table with eUML. For example:</p><pre class="programlisting">BOOST_MSM_EUML_DECLARE_STATE((Open_Entry,Open_Exit),Open_def)
struct Open_impl : public Open_def
{
BOOST_MSM_EUML_DECLARE_INTERNAL_TRANSITION_TABLE((
open_close [internal_guard1] / internal_action1 ,
open_close [internal_guard2] / internal_action2
))
}; </pre></div></div></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re02.html">Prev</a>&nbsp;</td><td width="20%" align="center"><a accesskey="u" href="pt02.html">Up</a></td><td width="40%" align="right">&nbsp;</td></tr><tr><td width="40%" align="left" valign="top">Back-end&nbsp;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&nbsp;</td></tr></table></div></body></html>
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