arphaman added inline comments.

================
Comment at: lib/Index/USRGeneration.cpp:820
+    if (const ArrayType *const AT = dyn_cast<ArrayType>(T)) {
+      VisitType(AT->getElementType());
+      Out << "[";
----------------
We should probably follow the other types and just set `T = 
AT->getElementType()` instead of using `VisitType` and `continue` instead of 
`return`ing at the end of this if.


================
Comment at: lib/Index/USRGeneration.cpp:821
+      VisitType(AT->getElementType());
+      Out << "[";
+
----------------
The "[" "]" syntax could collide with the vector-type USRs. What about using 
another character? Maybe '{'?


================
Comment at: lib/Index/USRGeneration.cpp:826
+        case ArrayType::Star    : Out << "*"; break;
+        default                 : ;
+      }
----------------
I think it's better to check 'ArrayType::Normal' instead of `default` to ensure 
we will be able to distinguish between added size modifiers that could be added 
in the future. We should also probably give it some representation, like 'n'.


https://reviews.llvm.org/D38643



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