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-rw-r--r--lib/stdlib/doc/src/gen_statem.xml67
-rw-r--r--lib/stdlib/src/gen_statem.erl19
-rw-r--r--lib/tools/emacs/erlang-skels.el14
3 files changed, 46 insertions, 54 deletions
diff --git a/lib/stdlib/doc/src/gen_statem.xml b/lib/stdlib/doc/src/gen_statem.xml
index fd498ee82e..6fa2d86e0b 100644
--- a/lib/stdlib/doc/src/gen_statem.xml
+++ b/lib/stdlib/doc/src/gen_statem.xml
@@ -4,7 +4,7 @@
<erlref>
<header>
<copyright>
- <year>2016</year>
+ <year>2016-2017</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
@@ -983,6 +983,33 @@ handle_event(_, _, State, Data) ->
</desc>
</datatype>
<datatype>
+ <name name="init_result"/>
+ <desc>
+ <p>
+ For a succesful initialization,
+ <c><anno>State</anno></c> is the initial
+ <seealso marker="#type-state"><c>state()</c></seealso>
+ and <c><anno>Data</anno></c> the initial server
+ <seealso marker="#type-data"><c>data()</c></seealso>
+ of the <c>gen_statem</c>.
+ </p>
+ <p>
+ The <seealso marker="#type-action"><c>Actions</c></seealso>
+ are executed when entering the first
+ <seealso marker="#type-state">state</seealso> just as for a
+ <seealso marker="#state callback">state callback</seealso>,
+ except that the action <c>postpone</c> is forced to
+ <c>false</c> since there is no event to postpone.
+ </p>
+ <p>
+ For an unsuccesful initialization,
+ <c>{stop,<anno>Reason</anno>}</c>
+ or <c>ignore</c> should be used; see
+ <seealso marker="#start_link/3"><c>start_link/3,4</c></seealso>.
+ </p>
+ </desc>
+ </datatype>
+ <datatype>
<name name="state_enter_result"/>
<desc>
<p>
@@ -1613,25 +1640,16 @@ handle_event(_, _, State, Data) ->
</func>
<func>
- <name>Module:init(Args) -> Result</name>
+ <name>Module:init(Args) -> Result(StateType)</name>
<fsummary>
Optional function for initializing process and internal state.
</fsummary>
<type>
<v>Args = term()</v>
- <v>Result = {ok,State,Data}</v>
- <v>&nbsp;| {ok,State,Data,Actions}</v>
- <v>&nbsp;| {stop,Reason} | ignore</v>
- <v>State = <seealso marker="#type-state">state()</seealso></v>
- <v>
- Data = <seealso marker="#type-data">data()</seealso>
- </v>
<v>
- Actions =
- [<seealso marker="#type-action">action()</seealso>] |
- <seealso marker="#type-action">action()</seealso>
+ Result(StateType) =
+ <seealso marker="#type-init_result">init_result(StateType)</seealso>
</v>
- <v>Reason = term()</v>
</type>
<desc>
<marker id="Module:init-1"/>
@@ -1644,30 +1662,9 @@ handle_event(_, _, State, Data) ->
the implementation state and server data.
</p>
<p>
- <c>Args</c> is the <c>Args</c> argument provided to the start
+ <c>Args</c> is the <c>Args</c> argument provided to that start
function.
</p>
- <p>
- If the initialization is successful, the function is to
- return <c>{ok,State,Data}</c> or
- <c>{ok,State,Data,Actions}</c>.
- <c>State</c> is the initial
- <seealso marker="#type-state"><c>state()</c></seealso>
- and <c>Data</c> the initial server
- <seealso marker="#type-data"><c>data()</c></seealso>.
- </p>
- <p>
- The <seealso marker="#type-action"><c>Actions</c></seealso>
- are executed when entering the first
- <seealso marker="#type-state">state</seealso> just as for a
- <seealso marker="#state callback">state callback</seealso>.
- </p>
- <p>
- If the initialization fails,
- the function is to return <c>{stop,Reason}</c>
- or <c>ignore</c>; see
- <seealso marker="#start_link/3"><c>start_link/3,4</c></seealso>.
- </p>
<note>
<p>
This callback is optional, so a callback module does not need
diff --git a/lib/stdlib/src/gen_statem.erl b/lib/stdlib/src/gen_statem.erl
index 018aca90e6..b6b02a47bc 100644
--- a/lib/stdlib/src/gen_statem.erl
+++ b/lib/stdlib/src/gen_statem.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2016. All Rights Reserved.
+%% Copyright Ericsson AB 2016-2017. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
@@ -47,15 +47,17 @@
%% Type exports for templates and callback modules
-export_type(
[event_type/0,
- init_result/0,
callback_mode_result/0,
- state_function_result/0,
- handle_event_result/0,
+ init_result/1,
state_enter_result/1,
event_handler_result/1,
reply_action/0,
enter_action/0,
action/0]).
+%% Old types, not advertised
+-export_type(
+ [state_function_result/0,
+ handle_event_result/0]).
%% Type that is exported just to be documented
-export_type([transition_option/0]).
@@ -143,9 +145,10 @@
{'reply', % Reply to a caller
From :: from(), Reply :: term()}.
--type init_result() ::
- {ok, state(), data()} |
- {ok, state(), data(), [action()] | action()} |
+-type init_result(StateType) ::
+ {ok, State :: StateType, Data :: data()} |
+ {ok, State :: StateType, Data :: data(),
+ Actions :: [action()] | action()} |
'ignore' |
{'stop', Reason :: term()}.
@@ -201,7 +204,7 @@
%% the server is not running until this function has returned
%% an {ok, ...} tuple. Thereafter the state callbacks are called
%% for all events to this server.
--callback init(Args :: term()) -> init_result().
+-callback init(Args :: term()) -> init_result(state()).
%% This callback shall return the callback mode of the callback module.
%%
diff --git a/lib/tools/emacs/erlang-skels.el b/lib/tools/emacs/erlang-skels.el
index eeba7f34e9..bdb3d9ad4a 100644
--- a/lib/tools/emacs/erlang-skels.el
+++ b/lib/tools/emacs/erlang-skels.el
@@ -1,7 +1,7 @@
;;
;; %CopyrightBegin%
;;
-;; Copyright Ericsson AB 2010-2016. All Rights Reserved.
+;; Copyright Ericsson AB 2010-2017. All Rights Reserved.
;;
;; Licensed under the Apache License, Version 2.0 (the "License");
;; you may not use this file except in compliance with the License.
@@ -915,11 +915,7 @@ Please see the function `tempo-define-template'.")
"%% process to initialize." n
(erlang-skel-separator-end 2)
"-spec init(Args :: term()) ->" n>
- "{ok, State :: term(), Data :: term()} |" n>
- "{ok, State :: term(), Data :: term()," n>
- "[gen_statem:action()] | gen_statem:action()} |" n>
- "ignore |" n>
- "{stop, Reason :: term()}." n
+ "gen_statem:init_result(atom())." n
"init([]) ->" n>
"process_flag(trap_exit, true)," n>
"{ok, state_name, #data{}}." n
@@ -1028,11 +1024,7 @@ Please see the function `tempo-define-template'.")
"%% process to initialize." n
(erlang-skel-separator-end 2)
"-spec init(Args :: term()) ->" n>
- "{ok, State :: term(), Data :: term()} |" n>
- "{ok, State :: term(), Data :: term()," n>
- "[gen_statem:action()] | gen_statem:action()} |" n>
- "ignore |" n>
- "{stop, Reason :: term()}." n
+ "gen_statem:init_result(term())." n
"init([]) ->" n>
"process_flag(trap_exit, true)," n>
"{ok, state_name, #data{}}." n
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 22:55:03 +0000