Push DeclGroup much farther throughout the compiler.  Now the various
productions (except the already broken ObjC cases like @class X,Y;) in 
the parser that can produce more than one Decl return a DeclGroup instead
of a Decl, etc.

This allows elimination of the Decl::NextDeclarator field, and exposes
various clients that should look at all decls in a group, but which were
only looking at one (such as the dumper, printer, etc).  These have been
fixed.

Still TODO:

1) there are some FIXME's in the code about potentially using
DeclGroup for better location info.
2) ParseObjCAtDirectives should return a DeclGroup due to @class etc.
3) I'm not sure what is going on with StmtIterator.cpp, or if it can
   be radically simplified now.
4) I put a truly horrible hack in ParseTemplate.cpp.

I plan to bring up #3/4 on the mailing list, but don't plan to tackle
#1/2 in the short term.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68002 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/clang-cc/AnalysisConsumer.cpp b/tools/clang-cc/AnalysisConsumer.cpp
index 366f384..bc38593 100644
--- a/tools/clang-cc/AnalysisConsumer.cpp
+++ b/tools/clang-cc/AnalysisConsumer.cpp
@@ -220,7 +220,12 @@
       Ctx = &Context;
     }
     
-    virtual void HandleTopLevelDecl(Decl *D);
+    virtual void HandleTopLevelDecl(DeclGroupRef D) {
+      for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I)
+        HandleTopLevelSingleDecl(*I);
+    }
+    
+    void HandleTopLevelSingleDecl(Decl *D);
     virtual void HandleTranslationUnit(ASTContext &C);
     
     void HandleCode(Decl* D, Stmt* Body, Actions& actions);
@@ -411,7 +416,7 @@
 // AnalysisConsumer implementation.
 //===----------------------------------------------------------------------===//
 
-void AnalysisConsumer::HandleTopLevelDecl(Decl *D) { 
+void AnalysisConsumer::HandleTopLevelSingleDecl(Decl *D) { 
   switch (D->getKind()) {
     case Decl::Function: {
       FunctionDecl* FD = cast<FunctionDecl>(D);