Doug Gregor f7b5d9d69e [Type checker] Allow bridging conversions to more-optional types. ...

The prior formulation of bridging conversions allowed conversion to
more-optional types, e.g., converting an "NSDate" to "Date?", which
was broken by my recent refactoring in this area. Allow bridging
conversions to more-optional types by introducing extra optional
injections at the end.

Fixes rdar://problem/29780527.

2016-12-22 10:02:41 -08:00

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