trait Join[M1[_], M2[_], R[_]] extends AnyRef

This typeclass with its implicit instances decides how two containers should be joined.

Supported containers are

  • Id for scalar values
  • Option for optional values
  • Seq for a vector of values

Those container types form an ordering from most specific to most abstract:

  • Id contains always one value
  • Option contains always zero or one value
  • Seq can contain any number of values

The rule to determine what the result type of joining two container types is that the result is as generic as the more generic of both of the input types.

The implicit definitions in the companion object of join form evidence for this ordering.

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Abstract Value Members

  1. abstract def get(outer: Ops[M1], inner: Ops[M2]): Ops[R]

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
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  2. final def ##(): Int
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  8. def finalize(): Unit
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  9. final def getClass(): Class[_ <: AnyRef]
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  10. def hashCode(): Int
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  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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  14. final def notifyAll(): Unit
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  15. final def synchronized[T0](arg0: => T0): T0
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  16. def toString(): String
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  17. final def wait(): Unit
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  18. final def wait(arg0: Long, arg1: Int): Unit
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  19. final def wait(arg0: Long): Unit
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