decode alternative types in roc-json · beginners

I would like to use roc-json to decode some json where an object can represent one of several types, which have different properties. Is there any way to do this? I'd like to write something like this (but this doesn't work):

app "json-test"
    packages {
        pf: "https://github.com/roc-lang/basic-cli/releases/download/0.7.0/bkGby8jb0tmZYsy2hg1E_B2QrCgcSTxdUlHtETwm5m4.tar.br",
        json: "https://github.com/lukewilliamboswell/roc-json/releases/download/0.6.0/hJySbEhJV026DlVCHXGOZNOeoOl7468y9F9Buhj0J18.tar.br",
    }
    imports [
        pf.Stdout,
        json.Core.{ json },
        Decode.{ fromBytes },
    ]
    provides [main] to pf

jsonStr = Str.toUtf8 "{\"id\": \"http://example.org/A\"}"

Concept : [AtomicConcept { id : Str }, ExistentialRestriction { role : Str }]

result : Result Concept _
result = jsonStr |> Decode.fromBytes json

main =
    Stdout.line (Inspect.toStr result)

Anton (Dec 22 2023 at 14:07):

Isaac Van Doren (Dec 22 2023 at 14:51):

Unfortunately this isn’t supported right now. The compiler needs to be updated to support decoding into tag unions in general

Stream: beginners

Topic: decode alternative types in roc-json

Jim Balhoff (Dec 22 2023 at 13:51):

Anton (Dec 22 2023 at 14:07):

Isaac Van Doren (Dec 22 2023 at 14:51):

Isaac Van Doren (Dec 22 2023 at 14:52):

Isaac Van Doren (Dec 22 2023 at 14:53):

Jim Balhoff (Dec 22 2023 at 14:57):