Packages

sealed abstract class As[-A, +B] extends Serializable

As substitutability: A better <:<

This class exists to aid in the capture proof of subtyping relationships, which can be applied in other context to widen other type

A As B holds whenever A could be used in any negative context that expects a B. (e.g. if you could pass an A into any function that expects a B as input.)

This code was ported directly from scalaz to cats using this version from scalaz: https://github.com/scalaz/scalaz/blob/a89b6d63/core/src/main/scala/scalaz/As.scala

The original contribution to scalaz came from Jason Zaugg

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Serializable, Serializable, AnyRef, Any
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Abstract Value Members

  1. abstract def substitute[F[-_]](p: F[B]): F[A]

    Use this subtyping relationship to replace B with a value of type A in a contravariant context.

    Use this subtyping relationship to replace B with a value of type A in a contravariant context. This would commonly be the input to a function, such as F in: type F[-B] = B => String. In this case, we could use A As B to turn an F[B] Into F[A].

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def andThen[C](that: As[B, C]): As[A, C]
    Annotations
    @inline()
  5. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  6. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  7. final def coerce(a: A): B
    Annotations
    @inline()
  8. final def compose[C](that: As[C, A]): As[C, B]
    Annotations
    @inline()
  9. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  10. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  11. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  12. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  13. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  14. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  15. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  16. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  17. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  18. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  19. def toString(): String
    Definition Classes
    AnyRef → Any
  20. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  21. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  22. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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