Doug Gregor 60b92937e8 Use the dynamic casting infrastructure for casts that bridge from Objective-C. ...

A checked cast such as "x as String" or "x as? [String]", where x is of
class or Objective-C existential type, is now handled as a normal
checked cast rather than a Sema-generated call to the corresponding
witness. This eliminates a pile of hairy code from constraint
application and takes a step toward <rdar://problem/17408934>.

The part of the switch_objc.swift test I removed wasn't testing
anything useful; that's what <rdar://problem/17408934> is about.



Swift SVN r20970

2014-08-03 16:39:28 +00:00

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