Use default arguments when field is not provided

[scalway]

Upickle and some other json libraries uses default arguments when field is not provided. It'll highly improve readability of yaml when you don't need to provide optional fields, and will give Devs much more flexibility.

//> using scala "3.2.2"
//> using dep "org.virtuslab::scala-yaml:0.0.6"

import org.virtuslab.yaml.*

case class Foo(id:String, name:String = "optional") derives YamlCodec

val example1 = 
	"id: 0112\n" + 
	"name: Tottally not fake name\n"
	
val example2 = 
	"id: 0113\n"

println(">" + example1.as[Foo]) //> Right(Foo(0112,Tottally not fake name))
println(">" + example2.as[Foo]) //> Left(ConstructError(Key name doesn't exist in parsed document)) 
// expected                     //> Right(Foo(0113,optional))

[Flowdalic]

I am looking for a similar feature, where defaults can be omitted from configuration files. However, I wonder if this should only be done if the type is Option. So instead of

case class Foo(id:String, name:String = "optional") derives YamlCodec

you have

case class Foo(id:String, name:Option[String] = None) derives YamlCodec

[Flowdalic]

Ha, after wondering why I see code related to the functionality I am looking for, I've discovered that this was only recently added: 9054aff and not yet released.