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Add optional callback of format_status/1 to GenServer #12241

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Add optional callback of format_status/1 to GenServer #12241

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10 changes: 10 additions & 0 deletions lib/elixir/lib/gen_server.ex
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Original file line number Diff line number Diff line change
Expand Up @@ -703,11 +703,14 @@ defmodule GenServer do
@callback format_status(reason, pdict_and_state :: list) :: term
when reason: :normal | :terminate

@callback format_status(status) :: status

@optional_callbacks code_change: 3,
terminate: 2,
handle_info: 2,
handle_cast: 2,
handle_call: 3,
format_status: 1,
format_status: 2,
handle_continue: 2

Expand Down Expand Up @@ -747,6 +750,13 @@ defmodule GenServer do
"""
@type from :: {pid, tag :: term}

@type status :: %{
required(:state) => term(),
required(:log) => list(:sys.system_event()),
optional(:message) => list(),
optional(:reason) => term()
}

@doc false
defmacro __using__(opts) do
quote location: :keep, bind_quoted: [opts: opts] do
Expand Down