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Working with the Play Framework's JSON Library, I'm creating a Format[T] for some class T.

val a: JsPath = (JsPath \ "age")
val b: Format[Int] = (JsPath \ "age").format[Int]
val x: FunctionalBuilder[OFormat]#CanBuild2[Int, String] = ( 
           (JsPath \ "age").format[Int] and 
           (JsPath \ "location").format[String]
       )

Looking at the explicit types, we see that (in x) calling Format[Int] and Format[String] returns a type of FunctionalBuilder[OFormat]#CanBuild2[Int, String].

How does this conversion occur in the Play Framework JSON Library source?

Improve this question
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  • possible duplicate of Syntax and meaning of a Scala/Play! code sample Commented Feb 23, 2014 at 5:46
  • try val r1 = (JsPath \ "age").format[Int]; val r2 = (JsPath \ "location").format[String]; import scala.reflect.runtime.{universe => u}; u.show{ u.reify{ r1 and r2 }.tree }. Commented Feb 23, 2014 at 5:48
  • thanks, @senia. I voted to close given that you already answered it at the above link. Commented Feb 24, 2014 at 13:26
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