LabelledGeneric

LabelledGeneric is similar to Generic, but includes information about field names or class names in addition to the raw structure.

Continuing the example from shapeless.Generic, we use LabelledGeneric to convert an object to an shapeless.HList:

scala> val lgenDog = LabelledGeneric[Dog]
lgenDog: shapeless.LabelledGeneric[Dog]{ type Repr = Record.`'name -> String, 'bonesHidden -> Int`.T } = ...

scala> lgenDog.to(odie)
res15: lgenDog.Repr = odie :: 3 :: HNil

Note that the representation does not include the labels! The labels are actually encoded in the generic type representation using shapeless.Witness types.

As with shapeless.Generic, the representation for Animal captures the subclass embedding rather than the fields in the class, using shapeless.Coproduct:

scala> val lgenAnimal = LabelledGeneric[Animal]
lgenAnimal: shapeless.LabelledGeneric[Animal]{ type Repr = Union.`'Cat -> Cat, 'Dog -> Dog`.T } = ...

scala> lgenAnimal.to(odie)
res16: lgenAnimal.Repr = Dog(odie,3)

scala> genAnimal.to(odie) match { case Inr(Inl(dog)) => dog ; case _ => ???}
res19: Dog = Dog(odie,3)

T: the type which this instance can convert to and from a labelled generic representation

Linear Supertypes

Serializable, Serializable, AnyRef, Any

Type Members

abstract type Repr

The generic representation type for {T}, which will be composed of {Coproduct} and {HList} types

Abstract Value Members

abstract def from(r: Repr): T

Convert an instance of the generic representation to an instance of the concrete type
abstract def to(t: T): Repr

Convert an instance of the concrete type to the generic value representation

Concrete Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
def hashCode(): Int

Definition Classes
AnyRef → Any
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toString(): String

Definition Classes
AnyRef → Any
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )

Related Docs: object LabelledGeneric | package shapeless

trait LabelledGeneric[T] extends Serializable

Type Members

abstract type Repr

Abstract Value Members

abstract def from(r: Repr): T

abstract def to(t: T): Repr

Concrete Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

final def synchronized[T0](arg0: ⇒ T0): T0

def toString(): String

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped