Diagnose the declaration of explicit specializations after an implicit
instantiation has already been required. To do so, keep track of the
point of instantiation for anything that can be instantiated.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@83890 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaType.cpp b/lib/Sema/SemaType.cpp
index b82e5ec..3cdf615 100644
--- a/lib/Sema/SemaType.cpp
+++ b/lib/Sema/SemaType.cpp
@@ -1677,12 +1677,17 @@
     } else if (CXXRecordDecl *Rec
                  = dyn_cast<CXXRecordDecl>(Record->getDecl())) {
       if (CXXRecordDecl *Pattern = Rec->getInstantiatedFromMemberClass()) {
+        MemberSpecializationInfo *MSInfo = Rec->getMemberSpecializationInfo();
+        assert(MSInfo && "Missing member specialization information?");
         // This record was instantiated from a class within a template.
-        if (Rec->getTemplateSpecializationKind() != TSK_ExplicitSpecialization)
+        if (MSInfo->getTemplateSpecializationKind() 
+                                               != TSK_ExplicitSpecialization) {
+          MSInfo->setPointOfInstantiation(Loc);
           return InstantiateClass(Loc, Rec, Pattern,
                                   getTemplateInstantiationArgs(Rec),
                                   TSK_ImplicitInstantiation,
                                   /*Complain=*/diag != 0);
+        }
       }
     }
   }