Angela Laar a9f1096839 [Generic Signature] Unify generic upper bound functions ...

Opened existentials should be erased to the dependent upper bound
if the dependent member can be reduced to a concrete type. This
allows the generic signature to support parameterized protocol types
and bound generic class types by producing a more specific constraint
instead of just a plain protocol or class.

2023-05-17 15:33:50 -07:00

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