derivation

Type Members

1. case class Def(ident: String, className: String, excludeFields: List[String] = Nil, rename: List[(String, String)] = Nil) extends Product with Serializable

   

   Derivation configuration

   Derivation configuration

   ident

   used for grouping new derivation if target of annotation has nested case class

   className

   new derivation class name

   excludeFields

   define which fields have to be excluded from new derivation

   rename

   define how to rename fields during derivation

2. macro class Derive extends Annotation with StaticAnnotation

   

   Macro creates new structure in companion object for @see dev.nigredo.derivation.Derivation according to configuration.

   Macro creates new structure in companion object for @see dev.nigredo.derivation.Derivation according to configuration.

   @Derive(Def("Bar", "MyNewCaseClass"))
   case class Foo(value: Int)
   
   object Foo {
     object Bar  {
         case class MyNewCaseClass(value: Int)
     }
   }
   
   @Derive(Def("Bar", "MyNewCaseClass", List("value"))
   case class Foo(value: Int, value2: String)
   
   object Foo {
     object Bar {
       case class MyNewCaseClass(value2: String)
     }
   }
   
   @Derive(Def("Bar", "MyNewCaseClass", List("value"), List("value2" -> "renamedValue2"))
   case class Foo(value: Int, value2: String)
   
   object Foo {
     object Bar {
       case class MyNewCaseClass(renamedValue2: String)
     }
   }

   If macro is applied to sealed trait then trait SealedDerivation will be created in companion object as a phantom type.

   @Derive("Bar", "MyDerivedClass")
   sealed trait Foo
   
   object Foo {
     object Bar {
       sealed trait SealedDerivation
     }
   }

   Value classes will be simplified during application

   case class FooAnyVal(value: String) extends AnyVal
   
   @Derive(Def("Bar", "MyNewCaseClass"))
   case class Foo(value: FooAnyVal)
   
   object Foo {
     object Bar  {
         case class MyNewCaseClass(value: String)
     }
   }

   Restriction: All data structure has to be define in top level.

   Annotations

   @compileTimeOnly( ... )