Doug Gregor f56c68386e Start importing factory methods as initializers. ...

When an Objective-C class method follows the naming convention of a
factory method, i.e., its starting words match the ending words of the
class name, import it as a convenience initializer when it also:
  - Returns instancetype (i.e., dynamic Self in Swift parlance)
  - Has no NSError** parameters, which indicate the potential for failures

This is under a new flag (-enable-objc-factory-method-constructors)
because it is not generally functional. However, this is a step toward
<rdar://problem/16509024>.

Swift SVN r16479

2014-04-17 23:34:00 +00:00

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