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.
llvm-svn: 147410
diff --git a/clang/lib/AST/DeclBase.cpp b/clang/lib/AST/DeclBase.cpp
index 983673f..a71275a 100644
--- a/clang/lib/AST/DeclBase.cpp
+++ b/clang/lib/AST/DeclBase.cpp
@@ -784,8 +784,10 @@
return this;
case Decl::ObjCProtocol:
- // FIXME: Update when protocols properly model forward declarations.
- // For now, it's fine to fall through
+ if (ObjCProtocolDecl *Def = cast<ObjCProtocolDecl>(this)->getDefinition())
+ return Def;
+
+ return this;
case Decl::ObjCCategory:
return this;