Packages

trait Reducer[C, M] extends AnyRef

A Reducer[C,M] is a scalaz.Semigroup[M] that maps values of type C through unit to values of type M. A C-Reducer may also supply operations which tack on another C to an existing Semigroup M on the left or right. These specialized reductions may be more efficient in some scenarios and are used when appropriate by a scalaz.Generator. The names cons and snoc work by analogy to the synonymous operations in the list semigroup.

Minimal definition: unit or snoc

Based on the Reducer Haskell library by Edward Kmett (https://hackage.haskell.org/package/reducers).

Source
Reducer.scala
Linear Supertypes
AnyRef, Any
Known Subclasses
UnitReducer
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Type Members

  1. trait ReducerLaw extends AnyRef

Abstract Value Members

  1. abstract def cons(c: C, m: M): M

    Faster append(unit(c), m).

  2. implicit abstract def semigroup: Semigroup[M]
  3. abstract def snoc(m: M, c: C): M

    Faster append(m, unit(c)).

  4. abstract def unit(c: C): M

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
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  2. final def ##: Int
    Definition Classes
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  3. final def ==(arg0: Any): Boolean
    Definition Classes
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  4. def append(a1: M, a2: => M): M
  5. final def asInstanceOf[T0]: T0
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  6. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
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    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  7. def compose[N](r: Reducer[C, N]): Reducer[C, (M, N)]

    Distribute Cs to M and N.

  8. final def eq(arg0: AnyRef): Boolean
    Definition Classes
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  9. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  10. def finalize(): Unit
    Attributes
    protected[lang]
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    Annotations
    @throws(classOf[java.lang.Throwable])
  11. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
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    Annotations
    @native()
  12. def hashCode(): Int
    Definition Classes
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    Annotations
    @native()
  13. final def isInstanceOf[T0]: Boolean
    Definition Classes
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  14. final def ne(arg0: AnyRef): Boolean
    Definition Classes
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  15. final def notify(): Unit
    Definition Classes
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    Annotations
    @native()
  16. final def notifyAll(): Unit
    Definition Classes
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    Annotations
    @native()
  17. def reducerLaw: ReducerLaw
  18. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
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  19. def toString(): String
    Definition Classes
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  20. def unfoldl[B](seed: B)(f: (B) => Maybe[(B, C)])(implicit M: Monoid[M]): M
  21. def unfoldlOpt[B](seed: B)(f: (B) => Maybe[(B, C)]): Maybe[M]
  22. def unfoldr[B](seed: B)(f: (B) => Maybe[(C, B)])(implicit M: Monoid[M]): M
  23. def unfoldrOpt[B](seed: B)(f: (B) => Maybe[(C, B)]): Maybe[M]
  24. final def wait(): Unit
    Definition Classes
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    Annotations
    @throws(classOf[java.lang.InterruptedException])
  25. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
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    Annotations
    @throws(classOf[java.lang.InterruptedException])
  26. final def wait(arg0: Long): Unit
    Definition Classes
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    @throws(classOf[java.lang.InterruptedException]) @native()

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