cats.laws

MonadLaws

trait MonadLaws[F[_]] extends ApplicativeLaws[F] with FlatMapLaws[F]

Laws that must be obeyed by any Monad.

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  1. MonadLaws
  2. FlatMapLaws
  3. ApplicativeLaws
  4. ApplyLaws
  5. CartesianLaws
  6. FunctorLaws
  7. InvariantLaws
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Abstract Value Members

  1. implicit abstract def F: Monad[F]

Concrete Value Members

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

    Definition Classes
    AnyRef
  2. final def !=(arg0: Any): Boolean

    Definition Classes
    Any
  3. final def ##(): Int

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

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

    Definition Classes
    Any
  6. def apProductConsistent[A, B](fa: F[A], f: F[(A) ⇒ B]): IsEq[F[B]]

    Definition Classes
    ApplicativeLaws
  7. def applicativeComposition[A, B, C](fa: F[A], fab: F[(A) ⇒ B], fbc: F[(B) ⇒ C]): IsEq[F[C]]

    This law is applyComposition stated in terms of pure.

    This law is applyComposition stated in terms of pure. It is a combination of applyComposition and applicativeMap and hence not strictly necessary.

    Definition Classes
    ApplicativeLaws
  8. def applicativeHomomorphism[A, B](a: A, f: (A) ⇒ B): IsEq[F[B]]

    Definition Classes
    ApplicativeLaws
  9. def applicativeIdentity[A](fa: F[A]): IsEq[F[A]]

    Definition Classes
    ApplicativeLaws
  10. def applicativeInterchange[A, B](a: A, ff: F[(A) ⇒ B]): IsEq[F[B]]

    Definition Classes
    ApplicativeLaws
  11. def applicativeMap[A, B](fa: F[A], f: (A) ⇒ B): IsEq[F[B]]

    Definition Classes
    ApplicativeLaws
  12. def applyComposition[A, B, C](fa: F[A], fab: F[(A) ⇒ B], fbc: F[(B) ⇒ C]): IsEq[F[C]]

    Definition Classes
    ApplyLaws
  13. final def asInstanceOf[T0]: T0

    Definition Classes
    Any
  14. def cartesianAssociativity[A, B, C](fa: F[A], fb: F[B], fc: F[C]): (F[(A, (B, C))], F[((A, B), C)])

    Definition Classes
    CartesianLaws
  15. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  16. def covariantComposition[A, B, C](fa: F[A], f: (A) ⇒ B, g: (B) ⇒ C): IsEq[F[C]]

    Definition Classes
    FunctorLaws
  17. def covariantIdentity[A](fa: F[A]): IsEq[F[A]]

    Definition Classes
    FunctorLaws
  18. final def eq(arg0: AnyRef): Boolean

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

    Definition Classes
    AnyRef → Any
  20. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
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    Annotations
    @throws( classOf[java.lang.Throwable] )
  21. def flatMapAssociativity[A, B, C](fa: F[A], f: (A) ⇒ F[B], g: (B) ⇒ F[C]): IsEq[F[C]]

    Definition Classes
    FlatMapLaws
  22. def flatMapConsistentApply[A, B](fa: F[A], fab: F[(A) ⇒ B]): IsEq[F[B]]

    Definition Classes
    FlatMapLaws
  23. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any
  24. def hashCode(): Int

    Definition Classes
    AnyRef → Any
  25. def invariantComposition[A, B, C](fa: F[A], f1: (A) ⇒ B, f2: (B) ⇒ A, g1: (B) ⇒ C, g2: (C) ⇒ B): IsEq[F[C]]

    Definition Classes
    InvariantLaws
  26. def invariantIdentity[A](fa: F[A]): IsEq[F[A]]

    Definition Classes
    InvariantLaws
  27. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any
  28. def kleisliAssociativity[A, B, C, D](f: (A) ⇒ F[B], g: (B) ⇒ F[C], h: (C) ⇒ F[D], a: A): IsEq[F[D]]

    The composition of cats.data.Kleisli arrows is associative.

    The composition of cats.data.Kleisli arrows is associative. This is analogous to flatMapAssociativity.

    Definition Classes
    FlatMapLaws
  29. def kleisliLeftIdentity[A, B](a: A, f: (A) ⇒ F[B]): IsEq[F[B]]

    pure is the left identity element under left-to-right composition of cats.data.Kleisli arrows.

    pure is the left identity element under left-to-right composition of cats.data.Kleisli arrows. This is analogous to monadLeftIdentity.

  30. def kleisliRightIdentity[A, B](a: A, f: (A) ⇒ F[B]): IsEq[F[B]]

    pure is the right identity element under left-to-right composition of cats.data.Kleisli arrows.

    pure is the right identity element under left-to-right composition of cats.data.Kleisli arrows. This is analogous to monadRightIdentity.

  31. def mapFlatMapCoherence[A, B](fa: F[A], f: (A) ⇒ B): IsEq[F[B]]

    Make sure that map and flatMap are consistent.

  32. def monadLeftIdentity[A, B](a: A, f: (A) ⇒ F[B]): IsEq[F[B]]

  33. def monadRightIdentity[A](fa: F[A]): IsEq[F[A]]

  34. def monoidalLeftIdentity[A](fa: F[A]): (F[(Unit, A)], F[A])

    Definition Classes
    ApplicativeLaws
  35. def monoidalRightIdentity[A](fa: F[A]): (F[(A, Unit)], F[A])

    Definition Classes
    ApplicativeLaws
  36. final def ne(arg0: AnyRef): Boolean

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

    Definition Classes
    AnyRef
  38. final def notifyAll(): Unit

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

    Definition Classes
    AnyRef
  40. def toString(): String

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

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

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

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from FlatMapLaws[F]

Inherited from ApplicativeLaws[F]

Inherited from ApplyLaws[F]

Inherited from CartesianLaws[F]

Inherited from FunctorLaws[F]

Inherited from InvariantLaws[F]

Inherited from AnyRef

Inherited from Any

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