[英]Type error when when trying to override a generic function in a concrete implementation of an abstract class
可以使用以下代碼在控制台中重現該錯誤。
case class SomeClass(name: String)
abstract class Factory() {
protected def create[U](name: String) : U
}
class SomeFactory extends Factory() {
override def create[SomeClass](name: String) = SomeClass(name)
}
<控制台>:11:錯誤:類型不匹配;
找到:SomeClass(在對象$ iw中)必需:SomeClass(在方法create中)覆蓋def create [SomeClass](名稱:字符串)= SomeClass(名稱)
似乎這是您要實現的目標:
case class SomeClass(name: String)
abstract class Factory[U]() {
protected def create(name: String) : U
}
class SomeFactory extends Factory[SomeClass] {
def create(name: String) = SomeClass(name)
}
(我假設您是要SomeFactory
擴展Factory
)
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