Greg Clayton 6372d1cda2 Changed to using an "operator bool" instead of an "operator void*" ...

and avoid returning a pointer to the current object. In the new 
"operator bool" implementation, check the filename object first 
since many times we have FileSpec objects with a filename, yet no
directory.

llvm-svn: 139488

2011-09-12 04:00:42 +00:00

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