Mark Lacey 8605b29951 [Constraint system] Improve SE-0110 exception by allowing optional injection. ...

There was an oversight in the exception that was added to SE-0110 to
maintain compatibility for closure arguments. We were not allowing
optional injection to happen for the closure being passed in, so things
like:
  func test(_ fn: ((Int, Int))->()) {}
  test { x, y in }
worked, but
  func test(_ fn: (((Int, Int))->())?) {}
  test { x, y in }
did not.

Fixes SR-5433 (rdar://problem/33239714).

2017-07-11 11:19:28 -07:00

189 KiB

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