Index: include/clang/Tooling/Core/Diagnostic.h
===================================================================
--- include/clang/Tooling/Core/Diagnostic.h
+++ include/clang/Tooling/Core/Diagnostic.h
@@ -84,6 +84,13 @@
   ///
   /// Note: it is empty in unittest.
   std::string BuildDirectory;
+
+
+  /// Extra source ranges associated with the diagnostic. By default, the
+  /// diagnostic is only associated with the source location specified in the
+  /// `Message` field, but if `Ranges` is nonempty, they will be preferred
+  /// representation of the source code associated with the diagnostic.
+  ArrayRef<CharSourceRange> Ranges;
 };
 
 /// Collection of Diagnostics generated from a single translation unit.