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, 6 insertions, 0 deletions

diff --git a/clang/test/SemaTemplate/dependent-base-classes.cpp b/clang/test/SemaTemplate/dependent-base-classes.cpp
index 56979209ea1..242765894f7 100644
--- a/clang/test/SemaTemplate/dependent-base-classes.cpp
+++ b/clang/test/SemaTemplate/dependent-base-classes.cpp
@@ -4,3 +4,9 @@ template<typename T, typename U>
 struct X0 : T::template apply<U> { 
   X0(U u) : T::template apply<U>(u) { }
 };
+
+template<typename T, typename U>
+struct X1 : T::apply<U> { }; // expected-error{{missing 'template' keyword prior to dependent template name 'T::apply'}}
+
+template<typename T>
+struct X2 : vector<T> { }; // expected-error{{unknown template name 'vector'}}