Packages

class TypedMultiMap[T <: AnyRef, K[_ <: T]] extends AnyRef

An immutable multi-map that expresses the value type as a type function of the key type. Create it with a type constructor that expresses the relationship:

trait Key { type Type = T }
case class MyValue[T](...)

// type function from Key to MyValue
type KV[K <: Key] = MyValue[K#Type]

val map = TypedMultiMap.empty[Key, KV]

// a plain Int => String map would use this function:
type plain[K <: Int] = String

// a map T => T would use this function:
type identity[T <: AnyRef] = T

Caveat: using keys which take type parameters does not work due to conflicts with the existential interpretation of Key[_]. A workaround is to define a key type like above and provide a subtype that provides its type parameter as type member Type.

Source
TypedMultiMap.scala
Linear Supertypes
AnyRef, Any
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  1. TypedMultiMap
  2. AnyRef
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Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Visibility
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Value Members

  1. def ++(other: TypedMultiMap[T, K]): TypedMultiMap[T, K]

    Add all entries from the other map, overwriting existing entries.

    Add all entries from the other map, overwriting existing entries.

    FIXME: should it merge, instead?

  2. def equals(other: Any): Boolean
    Definition Classes
    TypedMultiMap → AnyRef → Any
  3. def get(key: T): Set[K[key.type]]

    Obtain all mappings for the given key.

  4. def hashCode(): Int
    Definition Classes
    TypedMultiMap → AnyRef → Any
  5. def inserted(key: T)(value: K[key.type]): TypedMultiMap[T, K]

    Return a map that has the given value added to the mappings for the given key.

  6. def keyRemoved(key: T): TypedMultiMap[T, K]

    Return a map that has all mappings for the given key removed.

  7. def keySet: Set[T]

    Return the set of keys which are mapped to non-empty value sets.

  8. def removed(key: T)(value: K[key.type]): TypedMultiMap[T, K]

    Return a map that has the given mapping from the given key removed.

  9. def setAll(key: T)(values: Set[K[key.type]]): TypedMultiMap[T, K]
  10. def toString(): String
    Definition Classes
    TypedMultiMap → AnyRef → Any
  11. def valueRemoved(value: Any): TypedMultiMap[T, K]

    Return a map that has the given value removed from all keys.