ShortTypeHints don't work for backtick-quoted class names

[delenius]

json4s version

4.1.0-M1

scala version

2.13.8

jdk version

OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.6+10)

In the following test, the quoted case fails. If I remove the special characters in the class name, it works.
It can be useful to support these escaped names. In my case, because I am generating classes programmatically from an external source.

import org.json4s.ShortTypeHints
import org.json4s.native.Serialization
import org.scalatest.FunSuite

trait Top

case class `-Quoted-`(a: Int) extends Top

case class Unquoted(a:Int) extends Top

class JsonQuoteTest extends FunSuite {

  implicit val formats = Serialization.formats(ShortTypeHints(List(
    classOf[`-Quoted-`],
    classOf[Unquoted]
  ), "node_type"))

  test("Quoted") {
    val jsonStr =
      """{
        |   "node_type": "-Quoted-",
        |   "a": 17
        |}
        |""".stripMargin
    val result = Serialization.read[Top](jsonStr)
    println(result)
  }

  test("Unquoted") {
    val jsonStr =
      """{
        |   "node_type": "Unquoted",
        |   "a": 17
        |}
        |""".stripMargin
    val result = Serialization.read[Top](jsonStr)
    println(result)
  }

}

The Quoted test produces this exception. Notice the spurious List here!

No constructor for type Entity, JObject(List((kind,JString(Procedure)), (node_type,JString(entity-.procedureT.-)), (substitution,JString(example algorithms)), (counter,JInt(0))))
org.json4s.MappingException: No constructor for type Entity, JObject(List((kind,JString(Procedure)), (node_type,JString(entity-.procedureT.-)), (substitution,JString(example algorithms)), (counter,JInt(0))))
	at org.json4s.reflect.package$.fail(package.scala:56)
	at org.json4s.Extraction$ClassInstanceBuilder.$anonfun$constructor$2(Extraction.scala:566)
	at scala.Option.getOrElse(Option.scala:201)
	at org.json4s.Extraction$ClassInstanceBuilder.constructor(Extraction.scala:566)
	at org.json4s.Extraction$ClassInstanceBuilder.instantiate(Extraction.scala:673)
	at org.json4s.Extraction$ClassInstanceBuilder.result(Extraction.scala:768)
	at org.json4s.Extraction$.$anonfun$extract$10(Extraction.scala:463)
	at org.json4s.Extraction$.$anonfun$customOrElse$1(Extraction.scala:781)
	at scala.PartialFunction.applyOrElse(PartialFunction.scala:214)
	at scala.PartialFunction.applyOrElse$(PartialFunction.scala:213)
	at scala.PartialFunction$$anon$1.applyOrElse(PartialFunction.scala:367)
	at org.json4s.Extraction$.customOrElse(Extraction.scala:781)
	at org.json4s.Extraction$.extract(Extraction.scala:455)
	at org.json4s.Extraction$.extract(Extraction.scala:56)
	at org.json4s.ExtractableJsonAstNode$.extract$extension(ExtractableJsonAstNode.scala:22)
	at org.json4s.native.Serialization$.read(Serialization.scala:80)
	at org.json4s.Serialization.read(Serialization.scala:31)
	at org.json4s.Serialization.read$(Serialization.scala:31)
	at org.json4s.native.Serialization$.read(Serialization.scala:33)