// Entry() is part of the interface State.
// It would be called on state entry.
func (self *CodeState) Entry(sm hsm.HSM, event hsm.Event) hsm.State {
Logln(self.ID(), "- Entry")
hsm.AssertEqual(event.Type(), hsm.EventEntry)
hsm.AssertTrue(self.entryCount >= self.initCount)
self.entryCount++
return nil
}
// Handle() is part of the interface State.
// It would be called with input events.
// Please refer to the state chart for all state transfers and
// actions round them.
func (self *CodeState) Handle(sm hsm.HSM, event hsm.Event) hsm.State {
Logln(self.ID(), "- Handle")
switch event.Type() {
case EventSlash:
// Trigger a state transfer. The target state is slash state.
sm.QTranOnEvent(StateSlashID, event)
// Return nil to tell the state machine that this event is completely
// handled. No need to propagrate it to our super state.
return nil
case EventChar:
e, ok := event.(*CCommentCharEvent)
hsm.AssertTrue(ok)
commentHSM, ok := sm.(*CCommentHSM)
hsm.AssertTrue(ok)
commentHSM.ProcessCodeChar(e.Char())
return nil
}
// Return super state to tell the state machine that this event is
// not completely handled. Please propagrate it to our super state.
return self.Super()
}
// Init() is part of the interface State.
// It would be called on state initialization.
func (self *CodeState) Init(sm hsm.HSM, event hsm.Event) hsm.State {
Logln(self.ID(), "- Init")
hsm.AssertEqual(event.Type(), hsm.EventInit)
hsm.AssertTrue(self.entryCount >= self.initCount)
self.initCount++
// Return super state in Init() to tell state machine that
// this state doesn't has state needed to be initialized.
// If QInit() is called(there is a state/sub-state needed to be
// initialized), then return nil.
// QTran() is not suitable to call in Init(), only QInit() could
// be used.
return self.Super()
}
func (self *SlashState) Handle(sm hsm.HSM, event hsm.Event) hsm.State {
Logln(self.ID(), "- Handle")
switch event.Type() {
case EventChar:
fallthrough
case EventSlash:
e, ok := event.(CCommentEvent)
hsm.AssertTrue(ok)
commentHSM, ok := sm.(*CCommentHSM)
hsm.AssertTrue(ok)
// Record a slash char and e.Char() before calling QTran() to
// trigger a state transfer, since both Entry and Exit of this state
// are not good places for these codes.
commentHSM.ProcessCodeChar('/')
commentHSM.ProcessCodeChar(e.Char())
sm.QTran(StateCodeID)
return nil
case EventStar:
sm.QTran(StateCommentID)
return nil
}
return self.Super()
}
func (self *S11State) Handle(sm hsm.HSM, event hsm.Event) hsm.State {
Logln(self.ID(), "- Handle e =", PrintEvent(event.Type()))
switch event.Type() {
case EventG:
sm.QTran(StateS211ID)
return nil
case EventH:
annotatedHSM, ok := sm.(*AnnotatedHSM)
hsm.AssertTrue(ok)
if annotatedHSM.GetFoo() {
annotatedHSM.SetFoo(false)
return nil
}
}
return self.Super()
}