sealed trait NotNull[A] extends AnyRef
An instance of NotNull[A] indicates that A does not have a static type
of Null.
This can be useful in preventing Null from being inferred when a type
parameter is omitted.
This trait is used along with ambiguous implicits to achieve the goal of
preventing inference of Null. This ambiguous implicit trick has been used
in the Scala community for some time. Here
is an early example of such a trick being used in a similar way to prevent a
Nothing type.
- Source
- NotNull.scala
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