What does "=>" mean in Scala?

Question

What does "=>" mean in the example below?

trait MyService[E <: Entity[ID]] extends Management { this: Repository[E] => // some code }

To the closevoters: this is neither too broad nor a duplicate (of what you linked). This should stay open unless there's a more specific duplicate — Daenyth
– Daenyth, Commented Jun 4, 2015 at 13:53

Gregor Raýman · Accepted Answer · 2015-06-04 12:25:50Z

In this example it means that this has to be of the type Repository[E]. That means that the trait MyService can only be mixed into classes extending Repository[E].

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