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• eff-writer_3
• 7.0.5
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• RightFold.scala

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org.atnos.eff.RightFold.scala Maven / Gradle / Ivy

package org.atnos.eff

/** support trait for folding values while possibly keeping some internal state */
trait RightFold[A, B] {
  type S
  val init: S
  def fold(a: A, s: S): S
  def finalize(s: S): B
}