型パラメータ

memo scala

型パラメータ

def post: Action[Request] =
  Action.async(DtoParser.parse[Request]) { implicit request =>


final def async[A](bodyParser: BodyParser[A])(block: R[A] => Future[Result]): Action[A] = composeAction(new Action[A] {
  def executionContext = self.executionContext
  def parser = composeParser(bodyParser)
  def apply(request: Request[A]) = try {
    invokeBlock(request, block)
  } catch {
    // NotImplementedError is not caught by NonFatal, wrap it
    case e: NotImplementedError => throw new RuntimeException(e)
    // LinkageError is similarly harmless in Play Framework, since automatic reloading could easily trigger it
    case e: LinkageError => throw new RuntimeException(e)
  }
})

def 関数名[型パラメータ,……](引数名:引数の型名,……):返り値 = 関数本体

型パラメータA = [Request]で

 

こういう

bodyParser:BodyParser[A] = DtoParser.parse[Request]

block: R[A] => Future[Result] = { implicit request => ~~}

blockは無名関数としてasyncに渡されてるかな

 

 

 

 

 

 

 

https://www.atmarkit.co.jp/ait/articles/1204/05/news126_2.html