How to create an instance of a platform specific class in KMM?-CodePudding

For example, I have the next class declarations:

// commonMain 
expect class MyUseCase {
    operator fun invoke()
}
// androidMain
actual class MyUseCase {
    actual operator fun invoke() {}
}
// iosMain
actual class MyUseCase {
    actual operator fun invoke() {}
}

Is there a way to create an instance of MyUseCase in commonMain?

// commonMain
val useCase = MyUseCase() // Doesn't work

P.S. It must be possible cuz Kotlin has information about actual implementations at the moment when it will create an instance of the class.

CodePudding user response：

You need to add a constructor for your class:

// commonMain 
expect class MyUseCase() {
    operator fun invoke()
}
// androidMain
actual class MyUseCase actual constructor() {
    actual operator fun invoke() {}
}
// iosMain
actual class MyUseCase actual constructor() {
    actual operator fun invoke() {}
}