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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  1. Optionizer
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Visibility
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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
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
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  4. final def asInstanceOf[T0]: T0
    Definition Classes
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  5. def clone(): AnyRef
    Attributes
    protected[lang]
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    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  7. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  8. def finalize(): Unit
    Attributes
    protected[lang]
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    @throws(classOf[java.lang.Throwable])
  9. final def getClass(): Class[_ <: AnyRef]
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    Annotations
    @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
    Definition Classes
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    @native()
  15. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  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
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  19. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
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    Annotations
    @throws(classOf[java.lang.InterruptedException])
  20. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()

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