1 files changed, 12 insertions, 0 deletions
diff --git a/include/clang/Basic/Module.h b/include/clang/Basic/Module.h
index 8fcb0e8b056a..28aa7db52992 100644
--- a/include/clang/Basic/Module.h
+++ b/include/clang/Basic/Module.h
@@ -62,6 +62,18 @@ public:
   /// \brief The location of the module definition.
   SourceLocation DefinitionLoc;
 
+  enum ModuleKind {
+    /// \brief This is a module that was defined by a module map and built out
+    /// of header files.
+    ModuleMapModule,
+
+    /// \brief This is a C++ Modules TS module interface unit.
+    ModuleInterfaceUnit
+  };
+
+  /// \brief The kind of this module.
+  ModuleKind Kind = ModuleMapModule;
+
   /// \brief The parent of this module. This will be NULL for the top-level
   /// module.
   Module *Parent;