Scala example source code file (Traverse1Syntax.scala)

This example Scala source code file (Traverse1Syntax.scala) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Scala by Example" ^TM.

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Java - Scala tags/keywords

foldable1syntax, totraverse1ops, totraverse1ops0, traverse1syntax, unapply

The Traverse1Syntax.scala Scala example source code

package scalaz
package syntax

/** Wraps a value `self` and provides methods related to `Traverse1` */
final class Traverse1Ops[F[_],A] private[syntax](val self: F[A])(implicit val F: Traverse1[F]) extends Ops[F[A]] {
  ////

  import Leibniz.===

  final def traverse1[G[_], B](f: A => G[B])(implicit G: Apply[G]): G[F[B]] =
    G.traverse1(self)(f)

  /** A version of `traverse1` that infers the type constructor `G` */
  final def traverse1U[GB](f: A => GB)(implicit G: Unapply[Apply, GB]): G.M[F[G.A]] =
    F.traverse1U[A, GB](self)(f)(G)

  /** Traverse with the identity function */
  final def sequence1[G[_], B](implicit ev: A === G[B], G: Apply[G]): G[F[B]] = {
    val fgb: F[G[B]] = ev.subst[F](self)
    F.sequence1(fgb)
  }

  /** A version of `sequence1` that infers the nested type constructor */
  final def sequence1U(implicit G: Unapply[Apply, A]): G.M[F[G.A]] =
    F.sequence1U(self)

  ////
}

sealed trait ToTraverse1Ops0 {
  implicit def ToTraverse1OpsUnapply[FA](v: FA)(implicit F0: Unapply[Traverse1, FA]) =
    new Traverse1Ops[F0.M,F0.A](F0(v))(F0.TC)

}

trait ToTraverse1Ops extends ToTraverse1Ops0 with ToTraverseOps with ToFoldable1Ops {
  implicit def ToTraverse1Ops[F[_],A](v: F[A])(implicit F0: Traverse1[F]) =
    new Traverse1Ops[F,A](v)

  ////

  ////
}

trait Traverse1Syntax[F[_]] extends TraverseSyntax[F] with Foldable1Syntax[F] {
  implicit def ToTraverse1Ops[A](v: F[A]): Traverse1Ops[F, A] = new Traverse1Ops[F,A](v)(Traverse1Syntax.this.F)

  def F: Traverse1[F]
  ////

  ////
}