< simtse> because val is open smart casts don t work It is b kotlinlang #getting-started

<@U16R80YLT>: because val is open, smart-casts don...

orangy

06/09/2016, 10:21 PM

@simtse: because val is open, smart-casts don’t work. It is because override can choose to return different values for subsequent calls. And

iterator

is not defined on a nullable list. Extract

boxes

into local variable and use it to smart-cast.