trait WriterEffect extends WriterCreation with WriterInterpretation
Effect for logging values alongside computations
Compared to traditional Writer monad which accumulates values by default this effect can be interpreted in different ways:
- log values to the console or to a file as soon as they are produced
- accumulate values in a list
Several writer effects can be used in the same stack if they are tagged.
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implicit
def
ListFold[A]: Fold[A, List[A]]
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- WriterInterpretation
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def
MonoidFold[A](implicit arg0: Monoid[A]): Fold[A, A]
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notify(): Unit
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def
notifyAll(): Unit
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def
runTaggedWriterFold[R <: Effects, U <: Effects, T, O, A, B](w: Eff[R, A])(fold: Fold[O, B])(implicit m: Aux[[X]AnyRef { ... /* 2 definitions in type refinement */ }, R, U]): Eff[U, (A, B)]
- Definition Classes
- WriterInterpretation
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def
runWriter[R <: Effects, U <: Effects, O, A, B](w: Eff[R, A])(implicit m: Aux[[X]WriterT[[X]X, O, X], R, U]): Eff[U, (A, List[O])]
run a writer effect and return the list of written values
run a writer effect and return the list of written values
This uses a ListBuffer internally to append values
- Definition Classes
- WriterInterpretation
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def
runWriterFold[R <: Effects, U <: Effects, O, A, B](w: Eff[R, A])(fold: Fold[O, B])(implicit m: Aux[[X]WriterT[[X]X, O, X], R, U]): Eff[U, (A, B)]
More general fold of runWriter where we can use a fold to accumulate values in a mutable buffer
More general fold of runWriter where we can use a fold to accumulate values in a mutable buffer
- Definition Classes
- WriterInterpretation
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def
runWriterTagged[R <: Effects, U <: Effects, T, O, A](w: Eff[R, A])(implicit m: Aux[[X]AnyRef { ... /* 2 definitions in type refinement */ }, R, U]): Eff[U, (A, List[O])]
run a tagged writer effect
run a tagged writer effect
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- WriterInterpretation
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final
def
synchronized[T0](arg0: ⇒ T0): T0
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def
tell[R, O](o: O)(implicit member: Member[[X]WriterT[[X]X, O, X], R]): Eff[R, Unit]
write a given value
write a given value
- Definition Classes
- WriterCreation
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def
tellTagged[R, T, O](o: O)(implicit member: Member[[X]AnyRef { ... /* 2 definitions in type refinement */ }, R]): Eff[R, Unit]
write a given value
write a given value
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- WriterCreation
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