From: Douglas Gregor <dgregor@apple.com>
Date: Thu, 5 Nov 2009 20:54:04 +0000 (+0000)
Subject: Be a little more careful when trying to extract a TypeDecl from a enum/class/struct... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=c7621a64717203e1f7d5d79dbf548e590b32596c;p=clang

Be a little more careful when trying to extract a TypeDecl from a enum/class/struct/union specifier; in invalid code, we may also see ClassTemplateDecls.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@86171 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Sema/SemaType.cpp b/lib/Sema/SemaType.cpp
index f003127f14..93ef1ea2ea 100644
--- a/lib/Sema/SemaType.cpp
+++ b/lib/Sema/SemaType.cpp
@@ -229,7 +229,8 @@ static QualType ConvertDeclSpecToType(Declarator &TheDeclarator, Sema &TheSema){
   case DeclSpec::TST_enum:
   case DeclSpec::TST_union:
   case DeclSpec::TST_struct: {
-    TypeDecl *D = cast_or_null<TypeDecl>(static_cast<Decl *>(DS.getTypeRep()));
+    TypeDecl *D 
+      = dyn_cast_or_null<TypeDecl>(static_cast<Decl *>(DS.getTypeRep()));
     if (!D) {
       // This can happen in C++ with ambiguous lookups.
       Result = Context.IntTy;
diff --git a/test/SemaTemplate/class-template-decl.cpp b/test/SemaTemplate/class-template-decl.cpp
index 8c717ea16e..a8163127b0 100644
--- a/test/SemaTemplate/class-template-decl.cpp
+++ b/test/SemaTemplate/class-template-decl.cpp
@@ -49,3 +49,5 @@ public:
 void f() {
   template<typename T> class X; // expected-error{{expression}}
 }
+
+template<typename T> class X1 { } var; // expected-error{{declared as a template}}