From d0c873799614d32c9c11280878ac1a856f92f707 Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Wed, 27 May 2009 17:30:49 +0000
Subject: [PATCH] Add some more tests for instantiation of declaration
 references. Also, improve some error recovery with explicit template
 instantiation.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@72484 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Sema/SemaDecl.cpp                     |  4 +++-
 lib/Sema/SemaTemplate.cpp                 |  3 +++
 test/SemaTemplate/instantiate-declref.cpp | 13 ++++++++++++-
 3 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index 5e09851770..d592cf6178 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -3358,6 +3358,7 @@ Sema::DeclPtrTy Sema::ActOnTag(Scope *S, unsigned TagSpec, TagKind TK,
     if (PrevDecl == 0) {
       Diag(NameLoc, diag::err_not_tag_in_scope) << Name << SS.getRange();
       Name = 0;
+      Invalid = true;
       goto CreateNewDecl;
     }
   } else if (Name) {
@@ -3629,7 +3630,8 @@ CreateNewDecl:
   New->setLexicalDeclContext(CurContext);
 
   // Set the access specifier.
-  SetMemberAccessSpecifier(New, PrevDecl, AS);
+  if (!Invalid)
+    SetMemberAccessSpecifier(New, PrevDecl, AS);
 
   if (TK == TK_Definition)
     New->startDefinition();
diff --git a/lib/Sema/SemaTemplate.cpp b/lib/Sema/SemaTemplate.cpp
index c533789458..97eca48b9f 100644
--- a/lib/Sema/SemaTemplate.cpp
+++ b/lib/Sema/SemaTemplate.cpp
@@ -2369,6 +2369,9 @@ Sema::ActOnExplicitInstantiation(Scope *S, SourceLocation TemplateLoc,
     return true;
   }
 
+  if (Tag->isInvalidDecl())
+    return true;
+
   CXXRecordDecl *Record = cast<CXXRecordDecl>(Tag);
   CXXRecordDecl *Pattern = Record->getInstantiatedFromMemberClass();
   if (!Pattern) {
diff --git a/test/SemaTemplate/instantiate-declref.cpp b/test/SemaTemplate/instantiate-declref.cpp
index cceaed00e6..3b6db38617 100644
--- a/test/SemaTemplate/instantiate-declref.cpp
+++ b/test/SemaTemplate/instantiate-declref.cpp
@@ -1,4 +1,4 @@
-// RUN: clang-cc -fsyntax-only %s
+// RUN: clang-cc -fsyntax-only -verify %s
 
 namespace N {
   struct Outer {
@@ -10,12 +10,22 @@ namespace N {
 
           static enum K1 { K1Val = sizeof(T) } Kind1;
           static enum { K2Val = sizeof(T)*2 } Kind2;
+          enum { K3Val = sizeof(T)*2 } Kind3;
 
           void foo() {
             K1 k1 = K1Val;
             Kind1 = K1Val;
             Outer::Inner::InnerTemplate<type>::VeryInner::Kind2 = K2Val;
+            Kind3 = K3Val;
           }
+
+          struct UeberInner {
+            void bar() {
+              K1 k1 = K1Val;
+              Kind1 = K1Val;
+              Outer::Inner::InnerTemplate<type>::VeryInner::Kind2 = K2Val;
+            }
+          };
         };
       };
     };
@@ -24,3 +34,4 @@ namespace N {
 
 typedef int INT;
 template struct N::Outer::Inner::InnerTemplate<INT>::VeryInner;
+template struct N::Outer::Inner::InnerTemplate<INT>::UeberInner; // expected-error{{'UeberInner' does not name a tag member}}
-- 
2.40.0