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kotlinlang

I guess I want to understand the magic of `init: BuildType.() -&gt; Unit`

This type is a function type. It defines `init` as a function which has a receiver of type `BuildType`, no parameters, and returns `Unit` (so no specific return value)

I see a slight inconsistency in the Kotlin syntax: for normal functions, if the last parameter is a lambda, you can omit the parentheses. But this is not the case for constructor parameters; hence we need the parentheses around the curly braces.

Yeah that's why I tend to avoid constructors with a single lambda. Usually a top-level function is fine

&gt; I tend to avoid constructors with a single lambda
Kotest is absolutely full of them!

Let me clarify: constructors of open classes (the ones that can potentially be used in a subclass declaration)