aboutsummaryrefslogtreecommitdiffstats
path: root/lib/stdlib/doc/src
diff options
context:
space:
mode:
authorRaimo Niskanen <[email protected]>2016-07-19 14:35:18 +0200
committerRaimo Niskanen <[email protected]>2016-07-19 14:35:18 +0200
commit7c10598da79e28c9b802029d94269cbebba2f21e (patch)
tree3617ee5d1e37cd84acd89efcb2fc4a75a33f9f0b /lib/stdlib/doc/src
parent440445cfd0cbeee8f2bb86b99b6d16caf7a5c9c7 (diff)
parentedd9607b3bea79be718b774b8c58e623b918eee2 (diff)
downloadotp-7c10598da79e28c9b802029d94269cbebba2f21e.tar.gz
otp-7c10598da79e28c9b802029d94269cbebba2f21e.tar.bz2
otp-7c10598da79e28c9b802029d94269cbebba2f21e.zip
Merge branch 'raimo/stdlib/gen_statem-types-and-templates/ERL-172_ERL-187/OTP-13746' into maint
* raimo/stdlib/gen_statem-types-and-templates/ERL-172_ERL-187/OTP-13746: Fix type and template errors from bugs.erlang.org: ERL-172 and ERL-187
Diffstat (limited to 'lib/stdlib/doc/src')
-rw-r--r--lib/stdlib/doc/src/gen_statem.xml18
1 files changed, 13 insertions, 5 deletions
diff --git a/lib/stdlib/doc/src/gen_statem.xml b/lib/stdlib/doc/src/gen_statem.xml
index c57a31fa21..ed44eef912 100644
--- a/lib/stdlib/doc/src/gen_statem.xml
+++ b/lib/stdlib/doc/src/gen_statem.xml
@@ -1262,9 +1262,9 @@ handle_event(_, _, State, Data) ->
<v>&nbsp;&nbsp;Vsn = term()</v>
<v>OldState = NewState = term()</v>
<v>Extra = term()</v>
- <v>Result = {NewCallbackMode,NewState,NewData} | Reason</v>
+ <v>Result = {CallbackMode,NewState,NewData} | Reason</v>
<v>
- NewCallbackMode =
+ CallbackMode =
<seealso marker="#type-callback_mode">callback_mode()</seealso>
</v>
<v>
@@ -1321,11 +1321,19 @@ handle_event(_, _, State, Data) ->
<p>
If successful, the function must return the updated
internal state in an
- <c>{NewCallbackMode,NewState,NewData}</c> tuple.
+ <c>{CallbackMode,NewState,NewData}</c> tuple.
</p>
<p>
- If the function returns <c>Reason</c>, the ongoing
- upgrade fails and rolls back to the old release.</p>
+ If the function returns a failure <c>Reason</c>, the ongoing
+ upgrade fails and rolls back to the old release.
+ Note that <c>Reason</c> can not be a 3-tuple since that
+ will be regarded as a
+ <c>{CallbackMode,NewState,NewData}</c> tuple,
+ and that a tuple matching <c>{ok,_}</c>
+ is an invalid failure <c>Reason</c>.
+ It is recommended to use an atom as <c>Reason</c> since
+ it will be wrapped in an <c>{error,Reason}</c> tuple.
+ </p>
<p>
This function can use
<seealso marker="erts:erlang#throw/1"><c>erlang:throw/1</c></seealso>