Packages

final class Pull[+F[_], +O, +R] extends AnyVal

A p: Pull[F,O,R] reads values from one or more streams, returns a result of type R, and produces a Stream[F,O] when calling p.stream.

Any resources acquired by p are freed following the call to stream.

Laws:

Pull forms a monad in R with pure and flatMap:

  • pure >=> f == f
  • f >=> pure == f
  • (f >=> g) >=> h == f >=> (g >=> h) where f >=> g is defined as a => a flatMap f flatMap g

raiseError is caught by handleErrorWith:

  • handleErrorWith(raiseError(e))(f) == f(e)
Source
Pull.scala
Linear Supertypes
AnyVal, Any
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Inherited
  1. Pull
  2. AnyVal
  3. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    Any
  2. final def ##(): Int
    Definition Classes
    Any
  3. def +(other: String): String
    Implicit
    This member is added by an implicit conversion from Pull[F, O, R] to any2stringadd[Pull[F, O, R]] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (Pull[F, O, R], B)
    Implicit
    This member is added by an implicit conversion from Pull[F, O, R] to ArrowAssoc[Pull[F, O, R]] performed by method ArrowAssoc in scala.Predef. This conversion will take place only if F is a subclass of Pure (F <: Pure).
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. final def ==(arg0: Any): Boolean
    Definition Classes
    Any
  6. def >>[F2[x] >: F[x], O2 >: O, R2](p2: ⇒ Pull[F2, O2, R2]): Pull[F2, O2, R2]

    Alias for flatMap(_ => p2).

  7. def as[R2](r2: R2): Pull[F, O, R2]

    Alias for _.map(_ => o2).

  8. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  9. def attempt: Pull[F, O, Either[Throwable, R]]

    Returns a pull with the result wrapped in Right, or an error wrapped in Left if the pull has failed.

  10. def covary[F2[x] >: F[x]]: Pull[F2, O, R]

    Lifts this pull to the specified effect type.

  11. def covaryAll[F2[x] >: F[x], O2 >: O, R2 >: R]: Pull[F2, O2, R2]

    Lifts this pull to the specified effect type, output type, and resource type.

  12. def covaryOutput[O2 >: O]: Pull[F, O2, R]

    Lifts this pull to the specified output type.

  13. def covaryResource[R2 >: R]: Pull[F, O, R2]

    Lifts this pull to the specified resource type.

  14. def ensuring(cond: (Pull[F, O, R]) ⇒ Boolean, msg: ⇒ Any): Pull[F, O, R]
    Implicit
    This member is added by an implicit conversion from Pull[F, O, R] to Ensuring[Pull[F, O, R]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  15. def ensuring(cond: (Pull[F, O, R]) ⇒ Boolean): Pull[F, O, R]
    Implicit
    This member is added by an implicit conversion from Pull[F, O, R] to Ensuring[Pull[F, O, R]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  16. def ensuring(cond: Boolean, msg: ⇒ Any): Pull[F, O, R]
    Implicit
    This member is added by an implicit conversion from Pull[F, O, R] to Ensuring[Pull[F, O, R]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  17. def ensuring(cond: Boolean): Pull[F, O, R]
    Implicit
    This member is added by an implicit conversion from Pull[F, O, R] to Ensuring[Pull[F, O, R]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  18. def flatMap[F2[x] >: F[x], O2 >: O, R2](f: (R) ⇒ Pull[F2, O2, R2]): Pull[F2, O2, R2]

    Applies the resource of this pull to f and returns the result.

  19. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from Pull[F, O, R] to StringFormat[Pull[F, O, R]] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  20. def getClass(): Class[_ <: AnyVal]
    Definition Classes
    AnyVal → Any
  21. def handleErrorWith[F2[x] >: F[x], O2 >: O, R2 >: R](h: (Throwable) ⇒ Pull[F2, O2, R2]): Pull[F2, O2, R2]

    If this terminates with Pull.raiseError(e), invoke h(e).

  22. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  23. def map[R2](f: (R) ⇒ R2): Pull[F, O, R2]

    Applies the resource of this pull to f and returns the result in a new Pull.

  24. def onComplete[F2[x] >: F[x], O2 >: O, R2 >: R](p2: ⇒ Pull[F2, O2, R2]): Pull[F2, O2, R2]

    Run p2 after this, regardless of errors during this, then reraise any errors encountered during this.

  25. def scope: Pull[F, O, Unit]

    Tracks any resources acquired during this pull and releases them when the pull completes.

  26. def stream: Stream[F, O]

    Interpret this Pull to produce a Stream.

    Interpret this Pull to produce a Stream. The result type R is discarded.

  27. def toString(): String
    Definition Classes
    Any
  28. def →[B](y: B): (Pull[F, O, R], B)
    Implicit
    This member is added by an implicit conversion from Pull[F, O, R] to ArrowAssoc[Pull[F, O, R]] performed by method ArrowAssoc in scala.Predef. This conversion will take place only if F is a subclass of Pure (F <: Pure).
    Definition Classes
    ArrowAssoc

Inherited from AnyVal

Inherited from Any

Inherited by implicit conversion any2stringadd from Pull[F, O, R] to any2stringadd[Pull[F, O, R]]

Inherited by implicit conversion StringFormat from Pull[F, O, R] to StringFormat[Pull[F, O, R]]

Inherited by implicit conversion Ensuring from Pull[F, O, R] to Ensuring[Pull[F, O, R]]

Inherited by implicit conversion ArrowAssoc from Pull[F, O, R] to ArrowAssoc[Pull[F, O, R]]

Ungrouped