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Improvement for decoders of custom types #21

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Janiczek opened this issue Oct 11, 2024 · 0 comments

Janiczek commented Oct 11, 2024 •

edited

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decoder : Decoder Foo
decoder =
    JD.field "tag" JD.string
        |> JD.andThen
            (\ctor ->
                case ctor of
                  -- snip actual strings
                  _ ->
                    JD.fail "Unrecognized constructor"

could become

                  -- snip
                  _ ->
                    JD.fail <| "Unrecognized Foo constructor: " ++ ctor

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