subclass

问题 Let's have these classes: class A { fun foo(): A = this } class B: A() { fun bar() { ... } } Now I would like Kotlin to detect when I call foo on B , and give me the result typed as B . So that I can write: B().foo().bar() With kotlin 1.4.20, this is not possible - it would need an explicit cast to B after foo() . Perhaps it could be handled by the compiler, if it clearly sees that the function returns this . Or maybe we could hint it explicitly... class A { fun <Self> foo(): Self = this } I

来源： https://stackoverflow.com/questions/64194477/c-sharp-subclassing-with-generics-i-need-an-extra-generic-parameter-for-ctor-b

来源： https://stackoverflow.com/questions/64194477/c-sharp-subclassing-with-generics-i-need-an-extra-generic-parameter-for-ctor-b

来源： https://stackoverflow.com/questions/64194477/c-sharp-subclassing-with-generics-i-need-an-extra-generic-parameter-for-ctor-b

来源： https://stackoverflow.com/questions/64194477/c-sharp-subclassing-with-generics-i-need-an-extra-generic-parameter-for-ctor-b

来源： https://stackoverflow.com/questions/36063911/c-inheritance-derived-class-pointer-to-a-base-class-invokes-derived-class-met

来源： https://stackoverflow.com/questions/36063911/c-inheritance-derived-class-pointer-to-a-base-class-invokes-derived-class-met

来源： https://stackoverflow.com/questions/9472936/how-to-test-django-custom-model-fields

来源： https://stackoverflow.com/questions/62184501/why-is-array-prototype-slice-so-slow-on-sub-classed-arrays

来源： https://stackoverflow.com/questions/62184501/why-is-array-prototype-slice-so-slow-on-sub-classed-arrays