json-iterator/Lobby

@atararaksin Hi, Andrey! If you are asking about Scala reincarnation of jsoniter and your case mentioned in the circe chat then try the following example:

import com.github.plokhotnyuk.jsoniter_scala.macros._
import com.github.plokhotnyuk.jsoniter_scala.core._

import java.io.ByteArrayInputStream

case class Foo(x: Float, y: Float)

val fooCodec: JsonValueCodec[Foo] = JsonCodecMaker.make(CodecMakerConfig)

def customArrayCodec(name: String)(handler: Foo => Unit): JsonValueCodec[Unit] = new JsonValueCodec[Unit] {
  override def decodeValue(in: JsonReader, default: Unit): Unit = {
    if (in.isNextToken('{')) {
      in.skipToKey("foos")
      if (in.isNextToken('[')) {
        do handler(fooCodec.decodeValue(in, fooCodec.nullValue))
        while (in.isNextToken(','))
      }
      if (!in.isNextToken('}')) in.skipToKey("")
    }
  }

  override def encodeValue(x: Unit, out: JsonWriter): Unit = ()

  override val nullValue: Unit = ()
}

val in = new ByteArrayInputStream("""{"name":"test","foos":[{"x":1.0,"y":2.0},{"x":3.0,"y":4.0}],"bars":[]}""".getBytes("UTF-8"))
readFromStream[Unit](in)(customArrayCodec("test") { foo =>
  println(foo)
})

It should print:

Foo(1.0,2.0)
Foo(3.0,4.0)