if I want to create enums from strings, where the ...

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[rrva]

if I want to create enums from strings, where the string value does not correspond to the enum name, and I want to scope the function to the enum, and I do not want to create an extension function on String?, what is idiomatic kotlin for it?

[Björn Mayer]

you could add a companion object with a fun of(value: String)

Call would look like this YourEnum.of("yourString")

[andries.fc]

Your can try the following function:

inline fun <reified E : Enum<E>> enumOfName(name: String): E? {
    return E::class.java.enumConstants.firstOrNull { it.name.toLowerCase() == name }
}

Given the following enums:

enum class Direction {
    NORTH,
    SOUTH,
    WEST,
    EAST
}

enum class Go {
    YES,
    NO,
    MAYBE
}

Will print result in:

println(Direction.EAST == enumOfName<Direction>("east"))

Prints "true"

println(Go.YES == enumOfName<Go>("anyplace"))

Prints "false"

[marstran]

I've answered this question on Stack Overflow before. See this: https://stackoverflow.com/questions/55018969/how-can-i-generalize-functions-on-an-enum-class-in-kotlin/55019478#55019478