zhengkai added a comment.

In http://reviews.llvm.org/D12379#245849, @rtrieu wrote:

> Why are you leaking the raw encoding of locations from the SourceManager?  
> This is an internal implementation detail and should not be relied on 
> externally.  SourceLocation is the typical way to use locations.


Because I want to check if all the ranges fit in the same argument of one macro 
invocation, they can be different Source Locations. In ExpansionInfo, these 
locations have the same ExpansionLocStart.


http://reviews.llvm.org/D12379



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