Can Kotlin do something like this just in valid: `...

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[Vampire]

Can Kotlin do something like this just in valid: inline fun <reified T> options(options: T.() -> Unit): T = object : T {}.apply(options)?

[serebit]

Well there're a couple things wrong here. First, you have no way to guarantee that T is open or abstract, or even that it has a no-argument constructor, so creating an anonymous object from it is out. Also, even if you could, generic types aren't constructable that way. I can't give you an effective way to work around this that doesn't take advantage of reflection, but maybe someone else can.

[Vampire]

T will actually be an interface and everything will have default values.

I wanted to make things like this nicer:

val result = ncc(input, object : NccOptions {
    override var sourceMap: Boolean? = true
    override var license: String? = "LICENSES"
}).await()

I changed it to

val result = ncc(input, object : NccOptions {}.apply {
    sourceMap = true
    license = "LICENSES"
}).await()

Now I thought it could be made like

val result = ncc(input, options<NccOptions> {
    sourceMap = true
    license = "LICENSES"
}).await()

with such a method, but it will probably not work even with inline reified types

[Vampire]

Ah, scratch that, I'm stupid.
That's exactly what jsObject is for and even nicer

val result = ncc(input, jsObject {
    sourceMap = true
    license = "LICENSES"
}).await()

I somehow thought this would not be typesafe but it is