clayborg requested changes to this revision.
clayborg added a comment.
This revision now requires changes to proceed.

A better solution would be to initialize UUID::m_num_uuid_bytes with zero and 
only set it to a valid value if we set bytes into it. Then UUID::IsValid() 
becomes easy:

  bool UUID::IsValid() const { return m_num_uuid_bytes > 0; }

This would allows us to actually have a UUID value that is valid and all 
zeroes. A few comments would need to be fixed as it currently assumes length is 
16 or 20.


https://reviews.llvm.org/D40537



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