what is the most performant way to access erased t...

# getting-started

[Hullaballoonatic]

what is the most performant way to access erased types? here's an example where perhaps you want to access it:

iterface Foo : Comparable<Bar> {
    override fun equals(other: Any?) = when (other) {
        is Comparable<*> -> // other is Comparable<Bar> && (other as Comparable<Bar>).compareTo(this) == 0
        else -> false
    }
}

cast as and try/catch?

[Dominaezzz]

is Foo ? 😛

[karelpeeters]

Measure it for your distribution types (ideally using JMH)! Things like this are really finicky depending on the number of possible classes that reach that code.

[karelpeeters]

Also, I get the feeling you're setting yourself up for a broken equals implementation there.

[Hullaballoonatic]

yeah, i just wanted to create an example

[Hullaballoonatic]

@Dominaezzz assume Foo isn't the only thing implementing Comparable<Bar>

[Dominaezzz]

Hmm, without directly asking the subclass for this information (using an extra virtual field), I don't think this is possible.