Use enum names without prefix in Kotlin?

Question

Is it possible to use enum name without its prefix?

enum class Color { red, blue, green }

data class Shape(val color: Color)

fun main() {
    println(Shape(color = red))
}

P.S.

Or maybe it has something like literal types in TypeScript? I don't actually need Enum, the string value would be fine as soon as the Compiler would be able to check the values at compile time, like in TypeScript.

type Color = 'red' | 'blue' | 'green'

class Shape {
    constructor(public color: Color) {}
}

console.log(new Shape('red')) // Will be validated at compile time

Which prefix do you mean? The class prefix like Color.red? — ChristianB
– ChristianB, Commented Dec 30, 2020 at 19:50

ChristianB · Accepted Answer · 2020-12-30 20:19:21Z

4

Yes, you can use an enum without the class prefix if you import it:

import Color.*

enum class Color { Red, Blue, Green }

val color = Red

Note: By convention, enum names should start with an uppercase letter.

Edit

First I thought it would be possible to not import the enum when you use it within the same file but in a different class or top-level function, but you still have to import it - to avoid the class prefix.

edited Dec 30, 2020 at 20:19

answered Dec 30, 2020 at 19:58

ChristianB

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2 Comments

Alex Craft Over a year ago

Thanks, but the first code in your examle won't compile

ChristianB Over a year ago

@Alex Craft you are right. Will update my answer

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