在科特林中用泛型覆盖函数

Overriding function with generics in kotlin

例如我有以下示例代码

fun f<T>( cb: (T, Int) -> Unit ): Unit {
  println("f called with cb which accepts 2 arguments"); 
}

fun f<T>( cb: (T) -> Unit ): Unit {
  println("f called with cb which accepts 1 argument"); 
  f<T> {item, position -> cb(item) }
}

fun main(args : Array<String>) {
  f { item -> }
  f { item, position -> }
}

显然我希望 f 函数选择正确的实现取决于我要传递给闭包的参数数量

目前 kompiller 给我错误:

(8, 7) : Overload resolution ambiguity: 
internal fun <T> f(cb: (T, kotlin.Int) -> kotlin.Unit): kotlin.Unit defined in root package
internal fun <T> f(cb: (T) -> kotlin.Unit): kotlin.Unit defined in root package

在线沙箱中的代码:http://kotlin-demo.jetbrains.com/?publicLink=100745728838428857114-628607155

编译器版本:org.jetbrains.kotlin:kotlin-gradle-plugin:0.10.770


UPD:youtrack 上的相关问题:https://youtrack.jetbrains.com/issue/KT-6939

感谢@miensol,我意识到这是我的错误。我在调用 f().

时忘记为 T 指定类型

固定代码:

fun f<T>( cb: (T, Int) -> Unit ): Unit {
  println("f called with cb which accepts 2 arguments"); 
}

fun f<T>( cb: (T) -> Unit ): Unit {
  println("f called with cb which accepts 1 argument"); 
  f<T> {item, position -> cb(item) }
}

fun main(args : Array<String>) {
  f<String> { item -> }
  f<Boolean> { item, position -> }
}