To actually answer your question, if the parent co...

# announcements

[karelpeeters]

To actually answer your question, if the parent constructor has at least one parameter you can use this trick to run whatever code you want:
super(param.also { ... })

[diesieben07]

shudder

[nil2l]

Yes, but you can’t share this computation between few parameters.

[karelpeeters]

You can set properties from withing the also block and use those as parameters.

[nil2l]

ctor(str: String): this(parse(str).s, parse(str).i)

[nil2l]

Hm? Could you show example for primary constructor with two parameters?

[diesieben07]

Guys... why not just write a factory method?

[nil2l]

It was mentioned in the question as known solution.

[nil2l]

aka static constructor.

[diesieben07]

Yes, and my question is why not pick that solution instead of fighting with the language like this.

[nil2l]

Just to sure I don’t miss something. Sometime Kotlin is very tricky! 🤖

[diesieben07]

Makes sense. 🙂

[diesieben07]

In my opinion a factory method is the best choice here, you can even make it look like a constructor call if you want to.

[nil2l]

What do you mean? Common practice is valueOf, fromFoo.

[diesieben07]

A operator fun invoke in a companion object can be called like a constructor.

[diesieben07]

Some people don't like that practice, but I think it's nice.

[nil2l]

Oh.. thanks.