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•  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

org.scalactic.OptionSugar

Optionizer