[scala-internals] class constructor fields are initialized early - Grokbase [PDF]

Sep 13, 2013 - (1 reply) I don't think I knew that class constructor fields are initialized early. They didn't mention t

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Grokbase (/) › Groups (/groups) › Scala (/s/scala) › scala-internals (/g/gg/scalainternals) › September 2013 (/g/gg/scala-internals/2013/09)

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[scala-internals] class constructor fields are initialized early

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Snytt/LRbzEGme6XCg5tSeK1ukyS) Sep 14, 2013 at 6:48 am (/g/gg/scala-internals/2013/09)

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I don't think I knew that class constructor fields are initialized early. They didn't mention that in the One Question FAQ.

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scala> abstract class Foo[+A] { def X: A ; println(s"Foo $X") } defined class Foo

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scala> final case class Bar[B](x: B) extends Foo[B] { val X =x } defined class Bar

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scala> Bar("goo") Foo null res1: Bar[String] = Bar(goo)

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scala> final case class Bar[B](X: B) extends Foo[B] defined class Bar

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scala-internals (/g/gg/scalainternals) (/g/gg/scalainternals/info) scala (/s/scala) Sep 14, '13 at 6:48a (/g/gg/scala-internals/2013/09) Sep 16, '13 at 10:08a (/g/gg/scala-internals/2013/09) 2 1 scala-lang.org #scala

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scala> Bar("goo") Foo goo res2: Bar[String] = Bar(goo)

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Som Snytt (/user/Som-Snytt/LRbzEGme6XCg5tSeK1ukyS) at Sep 16, 2013 at 10:08

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Covered by a puzzler, of course: http://scalapuzzlers.com/#pzzlr-004 (http://scalapuzzlers.com/#pzzlr-004) I was trying to decide whether to review the puzzlers in lieu of checking email on Monday morning, or before bed on Sunday evening. I opted for Sunday night so I could sleep on it. - Show quoted text -

reply (mailto:scala-internals%40googlegroups.com?In-Reply-To=%3CCAPaMnL6qL2rhsyaBMsuyNVeMZ-YnVBJsF77UmWSX7iV1vy4Wg%40mail.gmail.com%3E&Subject=%5Bscalainternals%5D%20Re%3A%20class%20constructor%20fields%20are%20initialized%20early) | permalink (/p/gg/scalainternals/139gtgcrzc/class-constructor-fields-are-initialized-early)

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