Out of curiosity, is there a reason why the parentheses of a function without parameters are not optional?

w/o parens it looks like a property, potentially

Also, you could potentially run into ambiguity with the

invoke

operator.

fun test(op: Thing.() ->) {
    op  // Does this reference the value, or invoke the lambda?
}

You can create some confusion by creating this extension function

operator fun Type1.invoke(block: () -> Type2) : Type3

🙂

No, I didn’t mean when calling the function. Yes the call should absolutely use empty parentheses. I’m referring to the function definition. What if instead of defining

fun foo() {...}

, you could write

fun foo {...}

. I don’t see a confusion or ambiguity here

Ah! That would be indeed a little less typing and because of the

fun

keyword, it won't be ambiguous. But somehow it looks odd/off to me....

Yeah, I got that feeling too, but it might just be a out of habbit. Like we’re so used to see functions declared with them that removing them feels odd but we could get used to that new way