Is 'name' not allowed in enums?

Support
1

Hi,

I have an enum class which has an enum value called name


enum class ColumnNames {
    id,
    name,
}

fun main() {
    println(ColumnNames.name)
}

and it fails to compile with

Conflicting declarations: enum entry name, public final val name: String

Is there a way to have an enum value called “name”? I tried putting it between backticks, but it didn’t work.

Here’s this example in playground:
https://play.kotlinlang.org/#eyJ2ZXJzaW9uIjoiMS42LjEwIiwicGxhdGZvcm0iOiJqYXZhIiwiYXJncyI6IiIsIm5vbmVNYXJrZXJzIjp0cnVlLCJ0aGVtZSI6ImlkZWEiLCJjb2RlIjoiXG5lbnVtIGNsYXNzIENvbHVtbk5hbWVzIHtcbiAgICBpZCxcbiAgICBuYW1lLFxufVxuXG5mdW4gbWFpbigpIHtcbiAgICBwcmludGxuKENvbHVtbk5hbWVzLm5hbWUpXG59In0=

2

That’s not possible. Note that convetions suggest either Name or NAME.

3

@al3c thanks for the quick answer! Yes, I know that it should be NAME, however this is from a generated code (a client generated from a graphql schema) and it uses the names found in the schema.

Can you point me to where is this defined that “name” cannot be an enum member?

4

It’s not specifically forbidden, but all enums inherit from java.lang.Enum
https://docs.oracle.com/javase/7/docs/api/java/lang/Enum.html

and that has already a name property.

1 Like
5

Yes, of course, I didn’t think of Java Enum, it makes sense! Thanks again!

6

Please vote for https://youtrack.jetbrains.com/issue/KT-44885

1 Like
7

Thanks, I just did!

8

That is both true and false. The name property is inspired from Java, but it’s not about inheritance. You also can’t use name in Kotlin/JS, where nothing inherits from Java.

9

It actually is about inheritance, but of kotlin.Enum, see language specification:

kotlin.Enum<T> is the built-in parameterized classifier type which is used as a superclass for all enum classes: every enum class E is implicitly a subtype of kotlin.Enum<E> .

On JVM they happen to be the same:

fun main() {
    println(java.lang.Enum::class == kotlin.Enum::class)
}
1 Like