Jordan Rose 3a52f2ad5c [Driver] Provide a single API to iterate over all valid file types. ...

Previously we had three separate instances of iterating from TY_INVALID+1
to TY_LAST, completely breaking type safety. Now we have a nice little
wrapper that takes a closure, which should inline down to the same thing
anyway.

Also, eliminate TY_LAST and just use TY_INVALID as our sentinel.

Swift SVN r23222

2014-11-11 00:43:28 +00:00

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