Introduce four new code-completion hooks for C++:

  - after "using", show anything that can be a nested-name-specifier.
  - after "using namespace", show any visible namespaces or namespace aliases
  - after "namespace", show any namespace definitions in the current scope
  - after "namespace identifier = ", show any visible namespaces or
    namespace aliases

llvm-svn: 82251
diff --git a/clang/lib/Sema/Sema.h b/clang/lib/Sema/Sema.h
index 2952c84..8bec9d5 100644
--- a/clang/lib/Sema/Sema.h
+++ b/clang/lib/Sema/Sema.h
@@ -3635,11 +3635,13 @@
   virtual void CodeCompleteMemberReferenceExpr(Scope *S, ExprTy *Base,
                                                SourceLocation OpLoc,
                                                bool IsArrow);
-  
   virtual void CodeCompleteTag(Scope *S, unsigned TagSpec);
-
   virtual void CodeCompleteQualifiedId(Scope *S, const CXXScopeSpec &SS,
                                        bool EnteringContext);
+  virtual void CodeCompleteUsing(Scope *S);
+  virtual void CodeCompleteUsingDirective(Scope *S);
+  virtual void CodeCompleteNamespaceDecl(Scope *S);
+  virtual void CodeCompleteNamespaceAliasDecl(Scope *S);
   //@}
   
   //===--------------------------------------------------------------------===//