Implement C++0x semantics for [temp.expl.spec]p2, which loosens the

restrictions on out-of-line specializations to allow them anywhere in
an enclosing context. Motivated by PR8084.

llvm-svn: 113717

1 files changed, 13 insertions, 4 deletions

diff --git a/clang/lib/Sema/SemaTemplate.cpp b/clang/lib/Sema/SemaTemplate.cpp
index 0fc83927b79..851f7b96045 100644
--- a/clang/lib/Sema/SemaTemplate.cpp
+++ b/clang/lib/Sema/SemaTemplate.cpp
@@ -3441,10 +3441,19 @@ static bool CheckTemplateSpecializationScope(Sema &S,
   if ((!PrevDecl || 
        getTemplateSpecializationKind(PrevDecl) == TSK_Undeclared ||
        getTemplateSpecializationKind(PrevDecl) == TSK_ImplicitInstantiation)){
-    // There is no prior declaration of this entity, so this
-    // specialization must be in the same context as the template
-    // itself, or in the enclosing namespace set.
-    if (!DC->InEnclosingNamespaceSetOf(SpecializedContext)) {
+    // C++ [temp.exp.spec]p2:
+    //   An explicit specialization shall be declared in the namespace of which
+    //   the template is a member, or, for member templates, in the namespace 
+    //   of which the enclosing class or enclosing class template is a member.
+    //   An explicit specialization of a member function, member class or 
+    //   static data member of a class template shall be declared in the 
+    //   namespace of which the class template is a member.
+    //
+    // C++0x [temp.expl.spec]p2:
+    //   An explicit specialization shall be declared in a namespace enclosing 
+    //   the specialized template.
+    if (!DC->InEnclosingNamespaceSetOf(SpecializedContext) &&
+        !(S.getLangOptions().CPlusPlus0x && DC->Encloses(SpecializedContext))) {
       if (isa<TranslationUnitDecl>(SpecializedContext))
         S.Diag(Loc, diag::err_template_spec_decl_out_of_scope_global)
         << EntityKind << Specialized;