Packages

  • package root
    Definition Classes
    root
  • package org
    Definition Classes
    root
  • package scalactic
    Definition Classes
    org
  • trait OptionSugar extends AnyRef

    Trait providing an implicit class that adds a toOr method to Option, which converts Some to Good, None to Bad.

    Trait providing an implicit class that adds a toOr method to Option, which converts Some to Good, None to Bad.

    You can use the toOr method to record information about why a processing of nested Options resulted in None. For example, the following for expression results in None if either the passed optional Person is None or else if the contained optional age is None:

    scala> case class Person(name: String, age: Option[Int])
defined class Person

scala> def ageOf(person: Option[Person]) =
     |   for {
     |     per <- person
     |     age <- per.age
     |   } yield age
ageOf: (person: Option[Person])Option[Int]

scala> ageOf(Some(Person("Ralph", Some(32))))
res0: Option[Int] = Some(32)

scala> ageOf(Some(Person("Curt", None)))
res3: Option[Int] = None

scala> ageOf(None)
res2: Option[Int] = None

    If you instead populate the for expression with Ors, supplying an error message or other "bad" value to the toOr method in case of None, you'll get an indication of which part failed if a None is encountered:

    scala> import OptionSugar._
import OptionSugar._

scala> def ageOf(person: Option[Person]) =
     |   for {
     |     per <- person toOr "no person here"
     |     age <- per.age toOr "ageless person"
     |   } yield age
ageOf: (person: Option[Person])org.scalactic.Or[Int,String]

scala> ageOf(Some(Person("Ralph", Some(32))))
res1: org.scalactic.Or[Int,String] = Good(32)

scala> ageOf(Some(Person("Curt", None)))
res2: org.scalactic.Or[Int,String] = Bad(ageless person)

scala> ageOf(None)
res3: org.scalactic.Or[Int,String] = Bad(no person here)

    Definition Classes
    scalactic
  • Optionizer

implicit class Optionizer[G] extends AnyRef

Implicit class that adds a toOr method to Option, which converts Some to Good, None to Bad.

Source
OptionSugar.scala
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Instance Constructors

  1. new Optionizer(option: Option[G])

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
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  3. final def ==(arg0: Any): Boolean
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  4. final def asInstanceOf[T0]: T0
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  5. def clone(): AnyRef
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    @native() @throws( ... )
  6. final def eq(arg0: AnyRef): Boolean
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  7. def equals(arg0: Any): Boolean
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  8. def finalize(): Unit
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    @throws( classOf[java.lang.Throwable] )
  9. final def getClass(): Class[_]
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    @native()
  10. def hashCode(): Int
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    @native()
  11. final def isInstanceOf[T0]: Boolean
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  12. final def ne(arg0: AnyRef): Boolean
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  13. final def notify(): Unit
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    @native()
  14. final def notifyAll(): Unit
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    @native()
  15. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
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  16. def toOr[B](orElse: ⇒ B): Or[G, B]

    Converts the wrapped Option to an Or.

  17. def toString(): String
    Definition Classes
    AnyRef → Any
  18. final def wait(): Unit
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    @throws( ... )
  19. final def wait(arg0: Long, arg1: Int): Unit
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    @throws( ... )
  20. final def wait(arg0: Long): Unit
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