feat: implement Scala 3 Constant and Union support for string-based literals as enums

zio / zio-json

Fast, secure JSON library with tight ZIO integration.

https://zio.dev/zio-json

Apache License 2.0

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Closed ThijsBroersen closed 3 weeks ago

ThijsBroersen commented 3 weeks ago

This PR implements support for string-based literal types. Single-value or Union-based.

Example:

case class Foo(aOrB: "A" | "B", optA: Option["A"]) derives JsonCodec

Foo("A", Some("A")).toJson

"""{"aOrB": "A", "optA": "A"}""".fromJson[Foo]

ThijsBroersen commented 3 weeks ago

I have a commit with doc changes ready but mdoc is not configured for Scala 3 examples... Can we change that?