Ted Kremenek 074150571f Rename isNull() to _isNull() (making them private), and make pointers ...

conform to LogicValue.

This approach was taken to keep _isNull because I first tried
to just use comparisons to nil instead of isNull().  Apparently
that led to some circular definitions, so it was easier to just
stage it this way.

Swift SVN r18301

2014-05-18 03:42:40 +00:00

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