Introduce the core infrastructure needed to model redeclaration chains

for Objective-C protocols, including:
  - Using the first declaration as the canonical declaration
  - Using the definition as the primary DeclContext
  - Making sure that all declarations have a pointer to the definition
  data, and that we know which declaration is the definition
  - Serialization support for redeclaration chains and for adding
  definitions to already-serialized declarations.

However, note that we're not taking advantage of much of this code
yet, because we're still re-using ObjCProtocolDecls.





git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147410 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/Serialization/ASTWriterDecl.cpp b/lib/Serialization/ASTWriterDecl.cpp
index f1394850ed..f6fc4304e7 100644
--- a/lib/Serialization/ASTWriterDecl.cpp
+++ b/lib/Serialization/ASTWriterDecl.cpp
@@ -517,6 +517,7 @@ void ASTDeclWriter::VisitObjCIvarDecl(ObjCIvarDecl *D) {
 }
 
 void ASTDeclWriter::VisitObjCProtocolDecl(ObjCProtocolDecl *D) {
+  VisitRedeclarable(D);
   VisitObjCContainerDecl(D);
   Record.push_back(D->isInitiallyForwardDecl());
   Record.push_back(D->isForwardProtoDecl);