but when I do Foo..Foo its a type of ClosedRange&l...

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[Bruno_]

but when I do Foo..Foo its a type of ClosedRange<Foo> insead of FooRange that I've implemented

[diesieben07]

You need to overload the range operator:

operator fun Foo.rangeTo(other: Foo) = FooRange(...)

[diesieben07]

See here: https://kotlinlang.org/docs/reference/operator-overloading.html

[Bruno_]

many thanks! ❤️

[Bruno_]

didn't know I have to overload the range too

[Bruno_]

@diesieben07 I did so

class IpAddressRange(
    start: Ipv4Address,
    endInclusive: Ipv4Address
) : ClosedRange<Ipv4Address>, IpAddressProgression(start, endInclusive)

operator fun Ipv4Address.rangeTo(other: Ipv4Address) = IpAddressRange(this, other)

and it worked at first but then I moved it to other module and broke, any ideas?

[diesieben07]

Make sure you import the function

[Bruno_]

damn indeed

[Bruno_]

thanks again