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Merge pull request #9462 from dwijnand/patmat-unrelated-unapply
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case-class-23-unrelated-unapply.scala:42: error: too many arguments for unapply pattern, maximum = 22 | ||
val TwentyThree(a, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, b) = x | ||
^ | ||
case-class-23-unrelated-unapply.scala:45: error: too many arguments for unapply pattern, maximum = 22 | ||
val TwentyThree(a2, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, b2) = arr | ||
^ | ||
2 errors |
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case class TwentyThree( | ||
_1: Int, | ||
_2: Int, | ||
_3: Int, | ||
_4: Int, | ||
_5: Int, | ||
_6: Int, | ||
_7: Int, | ||
_8: Int, | ||
_9: Int, | ||
_10: Int, | ||
_11: Int, | ||
_12: Int, | ||
_13: Int, | ||
_14: Int, | ||
_15: Int, | ||
_16: Int, | ||
_17: Int, | ||
_18: Int, | ||
_19: Int, | ||
_20: Int, | ||
_21: Int, | ||
_22: Int, | ||
_23: Int | ||
) | ||
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||
object TwentyThree { | ||
def unapply(a: Array[Int]): Option[TwentyThree] = { | ||
Option.when(a.length == 23) { | ||
TwentyThree( | ||
a(0), a(1), a(2), a(3), a(4), a(5), a(6), a(7), a(8), a(9), | ||
a(10), a(11), a(12), a(13), a(14), a(15), a(16), a(17), a(18), a(19), | ||
a(20), a(21), a(22), | ||
) | ||
} | ||
} | ||
} | ||
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||
// This is borked.. but I'm fairly certain it's borked since before I started meddling with it.. | ||
object Test extends App { | ||
val x = new TwentyThree(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23) | ||
val TwentyThree(a, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, b) = x | ||
println((a, b)) | ||
val arr = Array(0 , 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22) | ||
val TwentyThree(a2, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, b2) = arr | ||
println((a2, b2)) | ||
} |
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// scalac: -Werror | ||
final case class Foo(value: String) | ||
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object Foo { | ||
def unapply(str: String): Option[Foo] = Some(Foo(str)) | ||
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def extract(id: Foo): String = | ||
id match { | ||
case Foo(a) => a | ||
} | ||
} |
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// scalac: -Werror | ||
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sealed case class Sub1(str: String) | ||
final case class Sup1(str: String) extends Sup0 | ||
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final class Sub2 extends Sub1("") | ||
sealed trait Sup0 { def str: String } | ||
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// both of these unapplies are overloads of the synthetic unapply | ||
// i.e. it isn't suppressed | ||
object Sub1 { def unapply(x: Sub2): Some[String] = Some(x.str) } | ||
object Sup1 { def unapply(x: Sup0): Some[String] = Some(x.str) } | ||
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object Test { | ||
// these seek the original unapplies and should be converted to use their constructors | ||
def testSub1(x: Sub1) = x match { case Sub1(str) => str } | ||
def testSup1(x: Sup1) = x match { case Sup1(str) => str } | ||
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// these seek the user-defined alternative unapplies | ||
// thus they shouldn't accidentally be converted to use their constructors | ||
def testSub2(x: Sub2) = x match { case Sub1(str) => str } | ||
def testSup0(x: Sup0) = x match { case Sup1(str) => str } | ||
} |
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(1,3) |
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case class TwentyThree( | ||
_1: Int, | ||
_2: Int, | ||
_3: Int, | ||
_4: Int, | ||
_5: Int, | ||
_6: Int, | ||
_7: Int, | ||
_8: Int, | ||
_9: Int, | ||
_10: Int, | ||
_11: Int, | ||
_12: Int, | ||
_13: Int, | ||
_14: Int, | ||
_15: Int, | ||
_16: Int, | ||
_17: Int, | ||
_18: Int, | ||
_19: Int, | ||
_20: Int, | ||
_21: Int, | ||
_22: Int, | ||
_23: Int | ||
) | ||
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object TwentyThree { | ||
def unapply(x: TwentyThree): Some[(Int, Int, Int)] = Some(x._1, x._2, x._3) | ||
} | ||
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object Test extends App { | ||
val x = new TwentyThree(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23) | ||
val TwentyThree(a, 2, b) = x | ||
println((a, b)) | ||
} |