Packages

  • package root
    Definition Classes
    root
  • package cats

    The cats root package contains all the trait signatures of most Scala type classes.

    The cats root package contains all the trait signatures of most Scala type classes.

    Cats type classes are implemented using the approach from the Type classes as objects and implicits article.

    For each type class, cats provides three pieces: - Its signature: a trait that is polymorphic on a type parameter. Type class traits inherit from other type classes to indicate that any implementation of the lower type class (e.g. Applicative) can also serve as an instance for the higuer type class (e.g. Functor). - Type class 'instances, which are classes and objects that implement one or more type class signatures for some specific types. Type class instances for several data types from the Java or Scala standard libraries are declared in the subpackage cats.instances. - Syntax extensions, each of which provides the methods of the type class defines as extension methods (which in Scala 2 are encoded as implicit classes) for values of any type F; given that an instance of the type class for the receiver type (this) is in the implicit scope. Symtax extensions are declared in the cats.syntax package. - A set of laws, that are also generic on the type of the class, and are only defined on the operations of the type class. The purpose of these laws is to declare some algebraic relations (equations) between Scala expressions involving the operations of the type class, and test (but not verify) that implemented instances satisfy those equations. Laws are defined in the cats-laws package.

    Although most of cats type classes are declared in this package, some are declared in other packages: - type classes that operate on base types (kind *), and their implementations for standard library types, are contained in cats.kernel, which is a different SBT project. However, they are re-exported from this package. - type classes of kind F[_, _], such as cats.arrow.Profunctor" or cats.arrow.Arrow, which are relevant for Functional Reactive Programming or optics, are declared in the cats.arrow package. - Also, those type classes that abstract over (pure or impure) functional runtime effects are declared in the cats-effect library. - Some type classes for which no laws can be provided are left out of the main road, in a small and dirty alley. These are the alleycats.

    Definition Classes
    root
  • object Applicative extends Serializable
    Definition Classes
    cats
  • AllOps
  • Ops
  • ToApplicativeOps
  • nonInheritedOps
  • ops

trait AllOps[F[_], A] extends Ops[F, A] with Apply.AllOps[F, A] with InvariantMonoidal.AllOps[F, A]

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Inherited
  1. AllOps
  2. AllOps
  3. Ops
  4. AllOps
  5. AllOps
  6. AllOps
  7. Ops
  8. Ops
  9. AllOps
  10. AllOps
  11. Ops
  12. Ops
  13. Ops
  14. Ops
  15. Serializable
  16. Serializable
  17. AnyRef
  18. Any
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Visibility
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Type Members

  1. abstract type TypeClassType <: Applicative[F]
    Definition Classes
    AllOpsAllOpsOpsAllOpsAllOpsOpsOpsAllOpsOpsOpsOpsOps

Abstract Value Members

  1. abstract def self: F[A]
    Definition Classes
    Ops
  2. abstract val typeClassInstance: TypeClassType
    Definition Classes
    Ops

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def *>[B](fb: F[B]): F[B]
    Definition Classes
    Ops
    Annotations
    @inline()
  4. final def <*[B](fb: F[B]): F[A]
    Definition Classes
    Ops
    Annotations
    @inline()
  5. final def <*>[B, C](fa: F[B])(implicit arg0: <:<[A, (B) ⇒ C]): F[C]
    Definition Classes
    Ops
    Annotations
    @inline()
  6. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  7. def ap[B, C](fa: F[B])(implicit arg0: <:<[A, (B) ⇒ C]): F[C]
    Definition Classes
    Ops
  8. def ap2[B, C, D](fa: F[B], fb: F[C])(implicit arg0: <:<[A, (B, C) ⇒ D]): F[D]
    Definition Classes
    Ops
  9. def as[B](b: B): F[B]
    Definition Classes
    Ops
  10. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  11. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native() @IntrinsicCandidate()
  12. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  13. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  14. final def fmap[B](f: (A) ⇒ B): F[B]
    Definition Classes
    Ops
  15. def fproduct[B](f: (A) ⇒ B): F[(A, B)]
    Definition Classes
    Ops
  16. def fproductLeft[B](f: (A) ⇒ B): F[(B, A)]
    Definition Classes
    Ops
  17. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native() @IntrinsicCandidate()
  18. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native() @IntrinsicCandidate()
  19. def imap[B](f: (A) ⇒ B)(g: (B) ⇒ A): F[B]
    Definition Classes
    Ops
  20. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  21. def map[B](f: (A) ⇒ B): F[B]
    Definition Classes
    Ops
  22. def map2[B, C](fb: F[B])(f: (A, B) ⇒ C): F[C]
    Definition Classes
    Ops
  23. def map2Eval[B, C](fb: Eval[F[B]])(f: (A, B) ⇒ C): Eval[F[C]]
    Definition Classes
    Ops
  24. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  25. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @IntrinsicCandidate()
  26. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @IntrinsicCandidate()
  27. def product[B](fb: F[B]): F[(A, B)]
    Definition Classes
    Ops
  28. def productL[B](fb: F[B]): F[A]
    Definition Classes
    Ops
  29. def productR[B](fb: F[B]): F[B]
    Definition Classes
    Ops
  30. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  31. def toString(): String
    Definition Classes
    AnyRef → Any
  32. def tupleLeft[B](b: B): F[(B, A)]
    Definition Classes
    Ops
  33. def tupleRight[B](b: B): F[(A, B)]
    Definition Classes
    Ops
  34. def void: F[Unit]
    Definition Classes
    Ops
  35. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  36. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  37. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  38. def widen[B >: A]: F[B]
    Definition Classes
    Ops

Deprecated Value Members

  1. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] ) @Deprecated
    Deprecated

Inherited from InvariantMonoidal.AllOps[F, A]

Inherited from InvariantMonoidal.Ops[F, A]

Inherited from Apply.AllOps[F, A]

Inherited from InvariantSemigroupal.AllOps[F, A]

Inherited from Semigroupal.AllOps[F, A]

Inherited from Semigroupal.Ops[F, A]

Inherited from InvariantSemigroupal.Ops[F, A]

Inherited from Functor.AllOps[F, A]

Inherited from Invariant.AllOps[F, A]

Inherited from Invariant.Ops[F, A]

Inherited from Functor.Ops[F, A]

Inherited from Apply.Ops[F, A]

Inherited from Ops[F, A]

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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