Improve recovery for template-ids whose template-name doesn't actually

name a template, when they occur in a base-specifier. This is one of
the (few) places where we know for sure that an identifier followed by
a '<' must be a template name, so we can diagnose and recover well:

test/SemaTemplate/dependent-base-classes.cpp:9:16: error: missing
'template'
      keyword prior to dependent template name 'T::apply'
struct X1 : T::apply<U> { }; // expected-error{{missing 'template' ...
               ^
               template 
test/SemaTemplate/dependent-base-classes.cpp:12:13: error: unknown
template name
      'vector'
struct X2 : vector<T> { }; // expected-error{{unknown template name
'vector'}}
            ^
2 diagnostics generated.

llvm-svn: 93257

1 files changed, 8 insertions, 0 deletions

diff --git a/clang/lib/Sema/Sema.h b/clang/lib/Sema/Sema.h
index d46bfc6cffd..d06cecc4678 100644
--- a/clang/lib/Sema/Sema.h
+++ b/clang/lib/Sema/Sema.h
@@ -2367,6 +2367,14 @@ public:
                                           TypeTy *ObjectType,
                                           bool EnteringContext,
                                           TemplateTy &Template);
+  
+  virtual bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 
+                                           SourceLocation IILoc,
+                                           Scope *S,
+                                           const CXXScopeSpec *SS,
+                                           TemplateTy &SuggestedTemplate,
+                                           TemplateNameKind &SuggestedKind);
+    
   bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl);
   TemplateDecl *AdjustDeclIfTemplate(DeclPtrTy &Decl);