diff options
Diffstat (limited to 'lib/stdlib')
| -rw-r--r-- | lib/stdlib/doc/src/gen_statem.xml | 67 | ||||
| -rw-r--r-- | lib/stdlib/src/gen_statem.erl | 19 |
2 files changed, 43 insertions, 43 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> | {ok,State,Data,Actions}</v> - <v> | {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. %% |