language · language · Updated 2026-09-09

Enums, payloads, and match

enum names a closed set of cases. Payload cases can carry one typed value, and match selects a branch with an optional binding.

Use an enum when the valid states are finite and you want the compiler and reader to see every named possibility.

enum Name { Case, Payload(Type value) }
match value { Case { ... } Payload with name { ... } else { ... } }

Status: experimental

enum Result
{
    Ready,
    Failed(text reason)
}
Result result = Result.Failed("The player name is missing")
match result
{
    Result.Ready { Console.Log("Ready") }
    Result.Failed with reason { Console.Log(reason) }
    else { Console.Log("Unknown result") }
}

manifestVersion = "2"
package = "api.example.language__enums_match"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"