Trait/Object

shapeless.Default

AsOptions

Related Docs: object AsOptions | package Default

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trait AsOptions[T] extends DepFn0 with Serializable

Provides default values of case class-like types, as a HList of options.

Unlike Default, Out is made of elements like Option[...] instead of None.type and Some[...]. Thus, the availability of default values cannot be checked through types, only through values (via the apply method).

This representation can be more convenient to deal with when one only check the default values at run-time.

Method apply provides the HList of default values, typed as Out.

Example

case class CC(i: Int, s: String = "b")

val default = Default.AsOptions[CC]

// default.Out is  Option[Int] :: Option[String] :: HNil
// default() returns
//   None :: Some("b") :: HNil
// typed as default.Out
Linear Supertypes
Serializable, Serializable, DepFn0, AnyRef, Any
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  1. AsOptions
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Type Members

  1. abstract type Out <: HList

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    Definition Classes
    AsOptionsDepFn0

Abstract Value Members

  1. abstract def apply(): Out

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    Definition Classes
    DepFn0

Concrete Value Members

  1. final def !=(arg0: Any): Boolean

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

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    AnyRef → Any
  3. final def ==(arg0: Any): Boolean

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    AnyRef → Any
  4. final def asInstanceOf[T0]: T0

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    Any
  5. def clone(): AnyRef

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

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    AnyRef
  7. def equals(arg0: Any): Boolean

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    AnyRef → Any
  8. def finalize(): Unit

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

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    AnyRef → Any
  10. def hashCode(): Int

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    AnyRef → Any
  11. final def isInstanceOf[T0]: Boolean

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    Any
  12. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  13. final def notify(): Unit

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    AnyRef
  14. final def notifyAll(): Unit

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    AnyRef
  15. final def synchronized[T0](arg0: ⇒ T0): T0

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  16. def toString(): String

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  17. final def wait(): Unit

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    @throws( ... )
  18. final def wait(arg0: Long, arg1: Int): Unit

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    @throws( ... )
  19. final def wait(arg0: Long): Unit

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Inherited from Serializable

Inherited from Serializable

Inherited from DepFn0

Inherited from AnyRef

Inherited from Any

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