gen_fsm から gen_statem へ
Read OriginalErlang/OTP 19で導入されたgen_statemについて、従来のgen_fsmからの移行ポイントを詳細に説明。callback APIの整理、同期/非同期処理の統一、keep_state/repeat_stateなどの新機能、state_enterやpostponeなどの追加機能について解説。状態機械の実装における利便性の向上とコードの簡素化について考察。
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