Any idea while the compiler isn’t able to infer th...

# compiler

[charlesmuchene]

Any idea while the compiler isn’t able to infer that the self-referential vararg parameter passed on the constructor is a container and thus the given class is constructible ?

Current fix: Requires I make the parameter type nullable or otherwise suppress this warning.

[Dominaezzz]

Does class GraphNode(val value: Int, val children: Array<GraphNode>) work?

[charlesmuchene]

No it doesn’t. That requires me to pass an array when constructing every node or otherwise an empty array. Yikes!

[charlesmuchene]

There are several ways to go about this implementation. I was just wondering why the compiler isn’t able to infer that a vararg will result in a container type that can be empty.

[charlesmuchene]

@Dominaezzz I could modify your suggestion to this:

class GraphNode(val value: Int, children: Array<GraphNode> = emptyArray())

[dmitriy.novozhilov]

SelfReferenceConstructorParameter is an IDE warning, not compiler's (and it doesn't affect compilation)
Look like there is a bug in corresponding inspection, so you can create a ticket at https://youtrack.jetbrains.com/issues/KT

[charlesmuchene]

Thanks for the clarification @dmitriy.novozhilov. Creating a ticket on this.