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Support multiple parameter lists for case classes

See original GitHub issue

I’d like to derive a codec for

case class A(x:Int)(y:Int)

implicit val jsonCodec: JsonValueCodec[A] = JsonCodecMaker.make

but multiple parameter lists are not supported:

[error]      'A' hasn't a primary constructor with one parameter list. Please consider using a custom implicitly accessible codec for this type.
[error]      L197:   implicit val jsonCodec: JsonValueCodec[A] = JsonCodecMaker.make

Issue Analytics

State:
Created a year ago
Reactions:1
Comments:9 (4 by maintainers)

Top GitHub Comments

2reactions

plokhotnyukcommented, Jun 5, 2022

@fdietze @cornerman Here is a draft that supports primary constructors with multi-parameter lists: https://github.com/plokhotnyuk/jsoniter-scala/pull/905

Limitations for definitions are:

val or var for parameters in non-first parameter lists
no default values in non-first parameter lists

For sure your support and any help are welcome! Including GitHub stars and sponsoring 😉

1reaction

plokhotnyukcommented, Jun 6, 2022

@fdietze @cornerman Please peek a release with an initial support of multiple parameter lists in primary constructors: https://github.com/plokhotnyuk/jsoniter-scala/releases/tag/v2.13.29

Next steps will be refactoring of calculation of default values during parsing and adding support of default values for non-first parameter lists.

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