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.discipline_2.11.0.11.2-M1.source-code.Predicate.scala Maven / Gradle / Ivy

package org.typelevel.discipline

trait Predicate[A] extends (A => Boolean) {
  def apply(a: A): Boolean
  def &&(that: Predicate[A]) = Predicate[A](a => this(a) && that(a))
}

object Predicate {

  def apply[A](f: A => Boolean) = new Predicate[A] {
    def apply(a: A) = f(a)
  }

  def const[A](res: Boolean) = new Predicate[A] {
    def apply(a: A) = res
  }

}

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