[extras-cats] Add innerMap, innerFlatMap, innerFlatMapF, innerGetOrElse, innerGetOrElseF, innerFold and innerFoldF extension methods to F[Either[A, B]]

[kevin-lee]

Task

Summary

[extras-cats] Add innerMap, innerFlatMap, innerFlatMapF, innerGetOrElse, innerGetOrElseF, innerFold and innerFoldF extension methods to F[Either[A, B]]

Project Details

Version: 0.35.0

Description

• innerMap

  val feab: F[Either[A, B]] = ...
  feab.innerMap(B => D) // F[Either[A, D]]

  val feab: F[Either[String, Int]] = IO.pure(Right(1))
  // IO[Either[String, Int]] = IO(Right(1))
  feab.innerMap(_ + 999)
  // IO[Either[String, Int]] = IO(Right(1000))

---

• innerFlatMap

  val feab: F[Either[A, B]] = ...
  feab.innerFlatMap(B => Either[A, D]) // F[Either[A, D]]

  val feab: F[Either[String, Int]] = IO.pure(Right(1))
  // IO[Either[String, Int]] = IO(Right(1))
  feab.innerFlatMap(b => (b + 999).asRight[String])
  // IO[Either[String, Int]] = IO(Right(1000))

---

• innerFlatMapF

  val feab: F[Either[A, B]] = ...
  feab.innerFlatMapF(B => F[Either[A, D]]) // F[Either[A, D]]

  val feab: F[Either[String, Int]] = IO.pure(Right(1))
  // IO[Either[String, Int]] = IO(Right(1))
  feab.innerFlatMapF(b => IO.pure((b + 999).asRight[String]))
  // IO[Either[String, Int]] = IO(Right(1000))

---

• innerGetOrElse

  val feab: F[Either[A, B]] = ...
  feab.innerGetOrElse[D >: B](=> D) // F[D]

  val feab: F[Either[String, Int]] = IO.pure(Right(999))
  // IO[Either[String, Int]] = IO(Right(999))
  feab.innerGetOrElse(0)
  // IO[Int] = IO(999)
  
  val feab2: F[Either[String, Int]] = IO.pure("Error".asLeft[Int])
  // IO[Either[String, Int]] = IO(Left("Error"))
  feab2.innerGetOrElse(0)
  // IO[Int] = IO(0)

---

• innerGetOrElseF

  val feab: F[Either[A, B]] = ...
  feab.innerGetOrElseF[D >: B](=> F[D]) // F[D]

  val feab: F[Either[String, Int]] = IO.pure(Right(999))
  // IO[Either[String, Int]] = IO(Right(999))
  feab.innerGetOrElseF(IO.pure(0))
  // IO[Either[String, Int]] = IO(Right(999))
  
  val feab2: F[Either[String, Int]] = IO.pure("Error".asLeft[Int])
  // IO[Either[String, Int]] = IO(Left("Error"))
  feab2.innerGetOrElseF(IO.pure(0))
  // IO[Int] = IO(0)

---

• innerFold

  val feab: F[Either[A, B]] = ...
  feab.innerFold[D](=> D)(B => D) // F[D]

  val feab: F[Either[String, Int]] = IO.pure(Right(1))
  // IO[Either[String, Int]] = IO(Right(1))
  feab.innerFold(0)(_ + 999)
  // IO[Int] = IO(1000)
  
  val feab: F[Either[String, Int]] = IO.pure("Error".asLeft)
  // IO[Either[String, Int]] = IO(Left("Error"))
  feab.innerFold(0)(_ + 999)
  // IO[Int] = IO(0)

---

• innerFoldF

  val feab: F[Either[A, B]] = ...
  feab.innerFoldF[D](=> F[D])(B => F[D]) // F[D]

  val feab: F[Either[String, Int]] = IO.pure(Right(1))
  // IO[Either[String, Int]] = IO(Right(1))
  feab.innerFoldF(IO.pure(0))(b => IO.pure(b + 999))
  // IO[Int] = IO(1000)
  
  val feab: F[Either[String, Int]] = IO.pure("Error".asLeft)
  // IO[Either[String, Int]] = IO(Left("Error"))
  feab.innerFoldF(IO.pure(0))(b => IO.pure(b + 999))
  // IO[Int] = IO(0)