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test: add assertType coverage for untested type inference cases #80
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PHPでは
never型は戻り値専用の型(return-only type)であり、関数の引数の型ヒントとして使用することはできません。このコードを実行しようとすると、Fatal error: Type never can only be used as a return typeが発生します。PHPStanの静的解析用ファイルであり直接実行されない場合でも、無効なPHP構文を避けるために、引数の型ヒントから
neverを削除することをお勧めします。unwrapOrElseの定義から、PHPStanは引数$eを自動的にneverとして推論します。