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| author | Raimo Niskanen <[email protected]> | 2016-09-20 17:03:24 +0200 |
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| committer | Raimo Niskanen <[email protected]> | 2016-09-20 17:03:24 +0200 |
| commit | 1778a9e0c677134a6b71975168812bcfdc70c7aa (patch) | |
| tree | 4974a4a6526d6fd6c3637dabee34c6aa3e40b58b /system | |
| parent | 4ebdabdca2c964887115f21405993f3916843d10 (diff) | |
| download | otp-1778a9e0c677134a6b71975168812bcfdc70c7aa.tar.gz otp-1778a9e0c677134a6b71975168812bcfdc70c7aa.tar.bz2 otp-1778a9e0c677134a6b71975168812bcfdc70c7aa.zip | |
Improve docs
Diffstat (limited to 'system')
| -rw-r--r-- | system/doc/design_principles/statem.xml | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/system/doc/design_principles/statem.xml b/system/doc/design_principles/statem.xml index 43359829b2..565b0e5274 100644 --- a/system/doc/design_principles/statem.xml +++ b/system/doc/design_principles/statem.xml @@ -1010,6 +1010,8 @@ do_unlock() -> the state, you must explicitly insert the <c>internal</c> event or use a state transition function. + This is something that can be forgotten, and if you find that + annoying please look at the next chapter. </p> <p> The following is an implementation of entry actions @@ -1058,10 +1060,18 @@ enter(Tag, State, Data) -> Here is the same example as the previous but instead using the built in <seealso marker="#state_entry_events">state entry events</seealso>. - You will have to handle the state entry events in every state. + </p> + <p> + Since the state entry events are unconditionally inserted by + the <c>gen_statem</c> engine you can not forget to insert them + yourself and you will have to handle the state entry events + in every state. + </p> + <p> If you want state entry code in just a few states the previous example may be more suitable, especially to only send internal events when entering just those few states. + Note: additional discipline will be required. </p> <p> You can also in the previous example choose to generate |