RuleOver22.scala

import jto.validation._
import jto.validation.From
import jto.validation.xml.Rules._

import scala.xml.Node

val rule: Rule[Node, Option[String]] = From[Node] { __ => (__ \ "MyPath" ).read[Option[String]] }


case class Foo(
                v1: Option[String],v2: Option[String],
                v3: Option[String],v4: Option[String],
                v5: Option[String],v6: Option[String],
                v7: Option[String],v8: Option[String],
                v9: Option[String],v10: Option[String],
                v11: Option[String],v12: Option[String],
                v13: Option[String],v14: Option[String],
                v15: Option[String],v16: Option[String],
                v17: Option[String],v18: Option[String],
                v19: Option[String],v20: Option[String],
                v21: Option[String],v22: Option[String],
                v23: Option[String]
              )

val fromXmlRule: Rule[Node, Foo] = (
  rule ~
    rule ~
    rule ~
    rule ~
    rule ~
    rule ~
    rule ~
    rule ~
    rule ~
    rule ~
    rule ~
    rule ~
    rule ~
    rule ~
    rule ~
    rule ~
    rule ~
    rule ~
    rule ~
    rule ~
    rule ~
    rule ~
    rule
  ) (Foo.apply)

Error:(47, 11) value ~ is not a member of jto.validation.FunctorSyntax[[β$5$]jto.validation.Rule[scala.xml.Node,β$5$]]#FunctorSyntax22[Option[String],Option[String],Option[String],Option[String],Option[String],Option[String],Option[String],Option[String],Option[String],Option[String],Option[String],Option[String],Option[String],Option[String],Option[String],Option[String],Option[String],Option[String],Option[String],Option[String],Option[String],Option[String]]
possible cause: maybe a semicolon is missing before `value ~'?
    rule ~
         ^