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scala> class Inv[T](x: T)
defined class Inv
scala> val x: List[String] = List(1)
<console>:4: Error: type mismatch:
found: Int(1)
required: String
val x: List[String] = List(1)
^
scala> val y: List[List[String]] = List(List(1))
<console>:4: Error: type mismatch:
found: Int(1)
required: String
val y: List[List[String]] = List(List(1))
^
scala> val z: (List[String], List[Int]) = (List(1), List("a"))
<console>:4: Error: type mismatch:
found: Int(1)
required: String
val z: (List[String], List[Int]) = (List(1), List("a"))
^
<console>:4: Error: type mismatch:
found: String("a")
required: Int
val z: (List[String], List[Int]) = (List(1), List("a"))
^
scala> val a: Inv[String] = new Inv(new Inv(1))
<console>:5: Error: type mismatch:
found: Inv[T]
required: String
where T is a type variable with constraint >: Int(1)
val a: Inv[String] = new Inv(new Inv(1))
^
scala> val b: Inv[String] = new Inv(1)
<console>:5: Error: type mismatch:
found: Int(1)
required: String
val b: Inv[String] = new Inv(1)
^
scala> abstract class C {
type T
val x: T
val s: Unit = {
type T = String
var y: T = x
locally {
def f() = {
type T = Int
val z: T = y
}
f()
}
}
}
<console>:9: Error: type mismatch:
found: C.this.T(C.this.x)
required: T'
where T is a type in class C
T' is a type in the initalizer of value s which is an alias of String
var y: T = x
^
<console>:13: Error: type mismatch:
found: T(y)
required: T'
where T is a type in the initalizer of value s which is an alias of String
T' is a type in method f which is an alias of Int
val z: T = y
^
scala> :quit
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