1 files changed, 22 insertions, 1 deletions
diff --git a/include/clang/Frontend/MultiplexConsumer.h b/include/clang/Frontend/MultiplexConsumer.h
index d13565c27bc3..214fefb219cd 100644
--- a/include/clang/Frontend/MultiplexConsumer.h
+++ b/include/clang/Frontend/MultiplexConsumer.h
@@ -17,13 +17,34 @@
 
 #include "clang/Basic/LLVM.h"
 #include "clang/Sema/SemaConsumer.h"
+#include "clang/Serialization/ASTDeserializationListener.h"
 #include <memory>
 #include <vector>
 
 namespace clang {
 
 class MultiplexASTMutationListener;
-class MultiplexASTDeserializationListener;
+
+// This ASTDeserializationListener forwards its notifications to a set of
+// child listeners.
+class MultiplexASTDeserializationListener : public ASTDeserializationListener {
+public:
+  // Does NOT take ownership of the elements in L.
+  MultiplexASTDeserializationListener(
+      const std::vector<ASTDeserializationListener *> &L);
+  void ReaderInitialized(ASTReader *Reader) override;
+  void IdentifierRead(serialization::IdentID ID, IdentifierInfo *II) override;
+  void MacroRead(serialization::MacroID ID, MacroInfo *MI) override;
+  void TypeRead(serialization::TypeIdx Idx, QualType T) override;
+  void DeclRead(serialization::DeclID ID, const Decl *D) override;
+  void SelectorRead(serialization::SelectorID iD, Selector Sel) override;
+  void MacroDefinitionRead(serialization::PreprocessedEntityID,
+                           MacroDefinitionRecord *MD) override;
+  void ModuleRead(serialization::SubmoduleID ID, Module *Mod) override;
+
+private:
+  std::vector<ASTDeserializationListener *> Listeners;
+};
 
 // Has a list of ASTConsumers and calls each of them. Owns its children.
 class MultiplexConsumer : public SemaConsumer {