make a lazy var in scala

Question

Scala does not permit to create laze vars, only lazy vals. It make sense.

But I\'ve bumped on use case, where I\'d like to have similar capability. I need a lazy var

Answer 1

If you want to keep on using a lazy val (it can be used in path-dependent types and it's thread safe), you can add a layer of indirection in its definition (previous solutions use vars as an indirection):

lazy val value: Int = thunk()
@volatile private var thunk: () => Int = ..

thunk = ...
thunk = ...

You could encapsulate this in a class if you wanted to reuse it, of course.