I do know the concept of constructor parameters. I...

# intellij

[Marc Knaup]

I do know the concept of constructor parameters.
I was just wondering why bar2 is not marked as unused.

[karelpeeters]

Maybe you're just using it somewhere else? foo.bar2 or something like that?

[karelpeeters]

But don't put too much trust in the IDE, sometimes it wrongly marks things as used.

[Marc Knaup]

It's a class which isn't used anywhere - just for testing this.
You can reproduce this with random class or property names.

[Marc Knaup]

As soon as I use bar2 in init it gets marked as unused.
As soon as I remove the usage of bar1 in init it gets un-marked as unused.

[karelpeeters]

Then why is Foo not marked unused?

[Marc Knaup]

Unused symbol inspection is disabled

[Marc Knaup]

hmm, this is only about the val part, i.e. the property declaration

[karelpeeters]

That's interesting, I can't get it to tell me the val part is useless at all. Turns I just have that inspection disabled.

[Marc Knaup]

Does it mark the variable as unused or the val (i.e. property)?

[karelpeeters]

When I turn that on I get the same behavior as you.

[karelpeeters]

But it makes sense that the val inspection doesn't fire if the entire variable is unused, it would be a bit redundant to have both.

[karelpeeters]

image.png

[Marc Knaup]

Yeah, but I have the latter disabled.

[Marc Knaup]

It's just a bit confusing but it may make sense how it works

[karelpeeters]

Yeah the inspection specifically doesn't fire if there's no usages at all: https://github.com/JetBrains/kotlin/blob/d3f9d0866ac5d0688b44d21607fceb187d57fb9e/idea/src/org/jetbrains/kotlin/idea/inspections/CanBeParameterInspection.kt#L101