Improve recovery when we see a dependent template name that is missing

the required "template" keyword, using the same heuristics we do for
dependent template names in member access expressions, e.g.,

test/SemaTemplate/dependent-template-recover.cpp:11:8: error: use 'template'
      keyword to treat 'getAs' as a dependent template name
    T::getAs<U>();
       ^
       template 

Fixes PR5404.

llvm-svn: 104409

1 files changed, 6 insertions, 1 deletions

diff --git a/clang/lib/Parse/ParseTemplate.cpp b/clang/lib/Parse/ParseTemplate.cpp
index 8b9142ce9bd..c87ddad4e9b 100644
--- a/clang/lib/Parse/ParseTemplate.cpp
+++ b/clang/lib/Parse/ParseTemplate.cpp
@@ -971,12 +971,17 @@ ParsedTemplateArgument Parser::ParseTemplateArgument() {
 /// \brief Determine whether the current tokens can only be parsed as a 
 /// template argument list (starting with the '<') and never as a '<' 
 /// expression.
-bool Parser::IsTemplateArgumentList() {
+bool Parser::IsTemplateArgumentList(unsigned Skip) {
   struct AlwaysRevertAction : TentativeParsingAction {
     AlwaysRevertAction(Parser &P) : TentativeParsingAction(P) { }
     ~AlwaysRevertAction() { Revert(); }
   } Tentative(*this);
   
+  while (Skip) {
+    ConsumeToken();
+    --Skip;
+  }
+  
   // '<'
   if (!Tok.is(tok::less))
     return false;