diff --git a/core/clingutils/res/TClingUtils.h b/core/clingutils/res/TClingUtils.h
index de5a174ac835b..bac84e1414f77 100644
--- a/core/clingutils/res/TClingUtils.h
+++ b/core/clingutils/res/TClingUtils.h
@@ -613,12 +613,14 @@ static inline std::string DemangleNameForDlsym(const std::string& name)
 //______________________________________________________________________________
 // Return the type with all parts fully qualified (most typedefs),
 // including template arguments, appended to name.
-void GetFullyQualifiedTypeName(std::string &name, const clang::QualType &type, const cling::Interpreter &interpreter);
+void GetFullyQualifiedTypeName(std::string &name, const clang::QualType &type, const cling::Interpreter &interpreter,
+                               const clang::ClassTemplateSpecializationDecl *Spec = nullptr);
 
 //______________________________________________________________________________
 // Return the type with all parts fully qualified (most typedefs),
 // including template arguments, appended to name, without using the interpreter
-void GetFullyQualifiedTypeName(std::string &name, const clang::QualType &type, const clang::ASTContext &);
+void GetFullyQualifiedTypeName(std::string &name, const clang::QualType &type, const clang::ASTContext &,
+                               const clang::ClassTemplateSpecializationDecl *Spec = nullptr);
 
 //______________________________________________________________________________
 // Return the type normalized for ROOT,
diff --git a/core/clingutils/src/TClingUtils.cxx b/core/clingutils/src/TClingUtils.cxx
index b977d67cd193b..5b92bf16ec835 100644
--- a/core/clingutils/src/TClingUtils.cxx
+++ b/core/clingutils/src/TClingUtils.cxx
@@ -1358,7 +1358,8 @@ bool ROOT::TMetaUtils::HasCustomConvStreamerMemberFunction(const AnnotatedRecord
 
 void ROOT::TMetaUtils::GetQualifiedName(std::string &qual_name, const clang::QualType &type, const clang::NamedDecl &forcontext)
 {
-   ROOT::TMetaUtils::GetFullyQualifiedTypeName(qual_name, type, forcontext.getASTContext());
+   ROOT::TMetaUtils::GetFullyQualifiedTypeName(qual_name, type, forcontext.getASTContext(),
+      llvm::dyn_cast_or_null<clang::ClassTemplateSpecializationDecl>(&forcontext));
 }
 
 //----
@@ -1473,6 +1474,7 @@ static void CreateNameTypeMap(const clang::CXXRecordDecl &cl, ROOT::MembersTypeM
    std::string typenameStr;
 
    const clang::ASTContext& astContext =  cl.getASTContext();
+   auto CTSD = llvm::dyn_cast<clang::ClassTemplateSpecializationDecl>(&cl);
 
    // Loop over the non static data member.
    for(clang::RecordDecl::field_iterator field_iter = cl.field_begin(), end = cl.field_end();
@@ -1497,7 +1499,7 @@ static void CreateNameTypeMap(const clang::CXXRecordDecl &cl, ROOT::MembersTypeM
          }
       }
 
-      ROOT::TMetaUtils::GetFullyQualifiedTypeName(typenameStr, fieldType, astContext);
+      ROOT::TMetaUtils::GetFullyQualifiedTypeName(typenameStr, fieldType, astContext, CTSD);
       nameType[field_iter->getName().str()] = ROOT::Internal::TSchemaType(typenameStr.c_str(),dims.str().c_str());
    }
 
@@ -3489,9 +3491,10 @@ std::string ROOT::TMetaUtils::GetFileName(const clang::Decl& decl,
 
 void ROOT::TMetaUtils::GetFullyQualifiedTypeName(std::string &typenamestr,
                                                  const clang::QualType &qtype,
-                                                 const clang::ASTContext &astContext)
+                                                 const clang::ASTContext &astContext,
+                                                 const clang::ClassTemplateSpecializationDecl *Spec /*= nullptr*/)
 {
-   std::string fqname = cling::utils::TypeName::GetFullyQualifiedName(qtype, astContext);
+   std::string fqname = cling::utils::TypeName::GetFullyQualifiedName(qtype, astContext, Spec);
    TClassEdit::TSplitType splitname(fqname.c_str(),
                                     (TClassEdit::EModType)(TClassEdit::kLong64 | TClassEdit::kDropStd | TClassEdit::kDropStlDefault | TClassEdit::kKeepOuterConst));
    splitname.ShortType(typenamestr,TClassEdit::kDropStd | TClassEdit::kDropStlDefault | TClassEdit::kKeepOuterConst);
@@ -3501,7 +3504,8 @@ void ROOT::TMetaUtils::GetFullyQualifiedTypeName(std::string &typenamestr,
 
 void ROOT::TMetaUtils::GetFullyQualifiedTypeName(std::string &typenamestr,
                                                  const clang::QualType &qtype,
-                                                 const cling::Interpreter &interpreter)
+                                                 const cling::Interpreter &interpreter,
+                                                 const clang::ClassTemplateSpecializationDecl *Spec /*= nullptr*/)
 {
    // We need this because GetFullyQualifiedTypeName is triggering deserialization
    // This calling the same name function GetFullyQualifiedTypeName, but this should stay here because
@@ -3510,7 +3514,8 @@ void ROOT::TMetaUtils::GetFullyQualifiedTypeName(std::string &typenamestr,
 
    GetFullyQualifiedTypeName(typenamestr,
                              qtype,
-                             interpreter.getCI()->getASTContext());
+                             interpreter.getCI()->getASTContext(),
+                             Spec);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/core/dictgen/res/DictSelectionReader.h b/core/dictgen/res/DictSelectionReader.h
index b19135badd4f2..c3f7ec7539e64 100644
--- a/core/dictgen/res/DictSelectionReader.h
+++ b/core/dictgen/res/DictSelectionReader.h
@@ -260,25 +260,16 @@ class DictSelectionReader : public clang::RecursiveASTVisitor<DictSelectionReade
       std::unordered_set<std::string> fUnsplittableMembers {};
    };
 
-   inline bool
-   InSelectionNamespace(const clang::RecordDecl &,
-                        const std::string &str =
-                           ""); ///< Check if in the ROOT::Meta::Selection namespace
-   inline bool FirstPass(const clang::RecordDecl &); ///< First pass on the AST
-   inline bool SecondPass(const clang::RecordDecl &); ///< Second pass on the AST, using the information of the first one
-   inline void
-   ManageFields(const clang::RecordDecl &,
-                const std::string &,
-                ClassSelectionRule &,
-                bool); ///< Take care of the class fields
-   inline void
-   ManageBaseClasses(const clang::CXXRecordDecl &, const std::string &, bool &); ///< Take care of the class bases
+   bool InSelectionNamespace(const clang::RecordDecl &,
+                             const std::string &str = ""); ///< Check if in the ROOT::Meta::Selection namespace
+   bool FirstPass(const clang::RecordDecl &); ///< First pass on the AST
+   bool SecondPass(const clang::RecordDecl &); ///< Second pass on the AST, using the information of the first one
+   void ManageFields(const clang::RecordDecl &, const std::string &,
+                     ClassSelectionRule &, bool); ///< Take care of the class fields
+   void ManageBaseClasses(const clang::CXXRecordDecl &, const std::string &, bool &); ///< Take care of the class bases
    template <class T>
-   inline unsigned int ExtractTemplateArgValue(
-      const T &,
-      const std::string &); ///< Extract the value of the template parameter
-   inline const clang::TemplateArgumentList *GetTmplArgList(
-      const clang::CXXRecordDecl &); ///< Get the template arguments list if any
+   unsigned int ExtractTemplateArgValue(const T &, const std::string &); ///< Extract the value of the template parameter
+   const clang::TemplateArgumentList *GetTmplArgList(const clang::CXXRecordDecl &); ///< Get the template arguments list if any
 
    std::string PatternifyName(const std::string &className); ///< Transform instance name in pattern for selection
    void GetPointeeType(std::string &typeName); ///< Get name of the pointee type
diff --git a/core/dictgen/src/DictSelectionReader.cxx b/core/dictgen/src/DictSelectionReader.cxx
index b034c9a0b5ce2..9cac67101da2c 100644
--- a/core/dictgen/src/DictSelectionReader.cxx
+++ b/core/dictgen/src/DictSelectionReader.cxx
@@ -383,12 +383,27 @@ bool DictSelectionReader::SecondPass(const clang::RecordDecl &recordDecl)
 
 bool DictSelectionReader::VisitRecordDecl(clang::RecordDecl *recordDecl)
 {
+   if (auto CXXRD = llvm::dyn_cast<clang::CXXRecordDecl>(recordDecl)) {
+      if (CXXRD->getDescribedClassTemplate()) {
+         // this is a member of a template; ignore: dictionaries can only
+         // select instances / specializations.
+         return true;
+      }
+   }
+   if (auto CXXRD = llvm::dyn_cast<clang::CXXRecordDecl>(recordDecl->getDeclContext())) {
+      if (CXXRD->getDescribedClassTemplate()) {
+         // this is a member of a template; ignore: dictionaries can only
+         // select instances / specializations.
+         return true;
+      }
+   }
    if (fIsFirstPass)
       return FirstPass(*recordDecl);
    else
       return SecondPass(*recordDecl);
 }
 
+
 ////////////////////////////////////////////////////////////////////////////////
 
 /**
diff --git a/core/metacling/src/TClingDataMemberInfo.cxx b/core/metacling/src/TClingDataMemberInfo.cxx
index 57d64ef3c7c32..69f4f22051102 100644
--- a/core/metacling/src/TClingDataMemberInfo.cxx
+++ b/core/metacling/src/TClingDataMemberInfo.cxx
@@ -36,6 +36,7 @@ from the Clang C++ compiler, not CINT.
 #include "clang/AST/Attr.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/Decl.h"
+#include "clang/AST/DeclTemplate.h"
 #include "clang/AST/GlobalDecl.h"
 #include "clang/AST/Expr.h"
 #include "clang/AST/ExprCXX.h"
@@ -586,7 +587,8 @@ const char *TClingDataMemberInfo::TypeName() const
    // if (we_need_to_do_the_subst_because_the_class_is_a_template_instance_of_double32_t)
    vdType = ROOT::TMetaUtils::ReSubstTemplateArg(vdType, GetClassAsType() );
 
-   ROOT::TMetaUtils::GetFullyQualifiedTypeName(buf, vdType, *fInterp);
+   auto CTSD = llvm::dyn_cast<clang::ClassTemplateSpecializationDecl>(vd->getDeclContext());
+   ROOT::TMetaUtils::GetFullyQualifiedTypeName(buf, vdType, *fInterp, CTSD);
 
    return buf.c_str();
 }
diff --git a/core/metacling/src/TClingMethodArgInfo.cxx b/core/metacling/src/TClingMethodArgInfo.cxx
index f796ec3fde688..656fe04bb6881 100644
--- a/core/metacling/src/TClingMethodArgInfo.cxx
+++ b/core/metacling/src/TClingMethodArgInfo.cxx
@@ -29,6 +29,7 @@ the Clang C++ compiler, not CINT.
 #include "cling/Interpreter/Interpreter.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/Decl.h"
+#include "clang/AST/DeclTemplate.h"
 #include "clang/AST/Expr.h"
 #include "clang/AST/ExprCXX.h"
 #include "clang/AST/PrettyPrinter.h"
@@ -148,6 +149,10 @@ const char *TClingMethodArgInfo::TypeName() const
    if (!IsValid()) {
       return nullptr;
    }
-   return Type()->Name();
+   
+   const clang::ClassTemplateSpecializationDecl *spec = nullptr;
+   if (const auto FD = llvm::cast_or_null<clang::FunctionDecl>(TClingDeclInfo::GetDecl()))
+      spec = llvm::dyn_cast<clang::ClassTemplateSpecializationDecl>(FD->getDeclContext());
+   return Type()->Name(spec);
 }
 
diff --git a/core/metacling/src/TClingMethodInfo.cxx b/core/metacling/src/TClingMethodInfo.cxx
index baee85922eee5..55797f36a40d5 100644
--- a/core/metacling/src/TClingMethodInfo.cxx
+++ b/core/metacling/src/TClingMethodInfo.cxx
@@ -634,7 +634,9 @@ const char *TClingMethodInfo::GetPrototype()
    if (const clang::TypeDecl *td = llvm::dyn_cast<clang::TypeDecl>(GetDecl()->getDeclContext())) {
       std::string name;
       clang::QualType qualType(td->getTypeForDecl(),0);
-      ROOT::TMetaUtils::GetFullyQualifiedTypeName(name,qualType,*fInterp);
+      const clang::ClassTemplateSpecializationDecl *spec
+         = llvm::dyn_cast<clang::ClassTemplateSpecializationDecl>(td);
+      ROOT::TMetaUtils::GetFullyQualifiedTypeName(name, qualType, *fInterp, spec);
       buf += name;
       buf += "::";
    } else if (const clang::NamedDecl *nd = llvm::dyn_cast<clang::NamedDecl>(FD->getDeclContext())) {
@@ -688,9 +690,17 @@ const char *TClingMethodInfo::TypeName() const
    // The next *two* calls lock the interpreter mutex. Lock here first instead
    // of locking/unlocking twice.
    R__LOCKGUARD(gInterpreterMutex);
-   return Type()->Name();
+   const clang::ClassTemplateSpecializationDecl *spec
+      = llvm::dyn_cast<clang::ClassTemplateSpecializationDecl>(GetDecl()->getDeclContext());
+   return Type()->Name(spec);
 }
 
+std::string TClingMethodInfo::NormalizedName(ROOT::TMetaUtils::TNormalizedCtxt &ctx) const
+{
+   return Type()->NormalizedName(ctx);
+}
+
+
 const char *TClingMethodInfo::Title()
 {
    if (!IsValid()) {
diff --git a/core/metacling/src/TClingMethodInfo.h b/core/metacling/src/TClingMethodInfo.h
index 46cbeedf86618..563ebf1479903 100644
--- a/core/metacling/src/TClingMethodInfo.h
+++ b/core/metacling/src/TClingMethodInfo.h
@@ -165,6 +165,7 @@ class TClingMethodInfo final : public TClingDeclInfo {
    const char                                  *GetPrototype();
    const char                                  *Name() const override;
    const char                                  *TypeName() const;
+   std::string                                  NormalizedName(ROOT::TMetaUtils::TNormalizedCtxt &ctx) const;
    const char                                  *Title();
 };
 
diff --git a/core/metacling/src/TClingTypeInfo.cxx b/core/metacling/src/TClingTypeInfo.cxx
index e5bb88fda7468..7136ff107e702 100644
--- a/core/metacling/src/TClingTypeInfo.cxx
+++ b/core/metacling/src/TClingTypeInfo.cxx
@@ -33,6 +33,7 @@ but the type metadata comes from the Clang C++ compiler, not CINT.
 
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/DeclCXX.h"
+#include "clang/AST/DeclTemplate.h"
 #include "clang/AST/Type.h"
 #include "clang/AST/PrettyPrinter.h"
 #include "clang/Frontend/CompilerInstance.h"
@@ -97,7 +98,7 @@ void TClingTypeInfo::Init(const char *name)
 
 ////////////////////////////////////////////////////////////////////////////////
 
-const char *TClingTypeInfo::Name() const
+const char *TClingTypeInfo::Name(const clang::ClassTemplateSpecializationDecl *spec) const
 {
    if (!IsValid()) {
       return "";
@@ -109,7 +110,7 @@ const char *TClingTypeInfo::Name() const
    // TODO: This needs to be locked, but the lock cannot be placed in TClingUtils.cxx as it cannot depend from
    // TInterpreter.h for the declaration of gInterpreterMutex. Or can it?
    R__LOCKGUARD(gInterpreterMutex);
-   ROOT::TMetaUtils::GetFullyQualifiedTypeName(buf,fQualType,*fInterp);
+   ROOT::TMetaUtils::GetFullyQualifiedTypeName(buf,fQualType,*fInterp, spec);
    return buf.c_str();  // NOLINT
 }
 
diff --git a/core/metacling/src/TClingTypeInfo.h b/core/metacling/src/TClingTypeInfo.h
index c68a9ba7b2cf2..f66fc4cd71148 100644
--- a/core/metacling/src/TClingTypeInfo.h
+++ b/core/metacling/src/TClingTypeInfo.h
@@ -30,6 +30,10 @@
 
 #include "clang/AST/Type.h"
 
+namespace clang {
+   class ClassTemplateSpecializationDecl;
+}
+
 namespace cling {
 class Interpreter;
 }
@@ -65,7 +69,8 @@ class TClingTypeInfo final : public TClingDeclInfo {
    void                 Init(const char *name); // Set type by name.
    void                 Init(clang::QualType ty) { fQualType = ty; }
    bool                 IsValid() const override { return !fQualType.isNull(); }
-   const char          *Name() const override; // Get name of type.
+   const char          *Name() const override { return Name(nullptr); }
+   const char          *Name(const clang::ClassTemplateSpecializationDecl *spec) const; // Get name of type.
    long                 Property() const; // Get properties of type.
    int                  RefType() const; // Get CINT reftype of type.
    int                  Size() const; // Get size in bytes of type.
diff --git a/core/metacling/test/TClingMethodInfoTests.cxx b/core/metacling/test/TClingMethodInfoTests.cxx
index de3da8684afa3..74a2235b63944 100644
--- a/core/metacling/test/TClingMethodInfoTests.cxx
+++ b/core/metacling/test/TClingMethodInfoTests.cxx
@@ -5,10 +5,13 @@
 #include "TList.h"
 #include "TListOfFunctions.h"
 #include "TMethod.h"
+#include "TMethodArg.h"
 #include "TROOT.h"
 
 #include "gtest/gtest.h"
 
+#include <unordered_map>
+
 TEST(TClingMethodInfo, Prototype)
 {
    TClass *cl = TClass::GetClass("TObject");
@@ -555,3 +558,142 @@ namespace BUG6578 {
          std::cerr << "   " << iCtorExpected.first << '\n';
    }
 }
+
+// https://github.com/root-project/root/issues/7955
+TEST(TClingMethodInfo, NonDependentMemberTypes)
+{
+  gInterpreter->Declare(R"CODE(
+struct AScope {
+  using TheType = int;
+};
+
+
+template <class T>
+struct Template1 {
+  using type1 = int;
+  using type2 = AScope;
+  void f0(type1);
+  void f1(type1*);
+  void g0(type2);
+  void g1(type2*);
+  void g2(type2::TheType);
+  void g3(type2::TheType*);
+};
+
+Template1<float> xf1;
+
+struct X1 {
+  void f1(Template1<double>::type1) {}
+  void f2(Template1<double>::type2) {}
+  void g1(Template1<int>::type1) {}
+  void g2(Template1<int>::type2) {}
+};
+
+struct Y1: Template1<char> {
+  void yf1(type1);
+  void yf2(type2);
+  void yf3(type2::TheType);
+};
+
+template <class T> using TAlias1 = Template1<T>;
+struct Z1 {
+  void f1(TAlias1<double>::type1) {}
+  void f2(TAlias1<double>::type2) {}
+  void g1(TAlias1<int>::type1) {}
+  void g2(TAlias1<int>::type2) {}
+};
+
+template <class T>
+struct Template2 {
+  struct Inner {
+     using type = AScope;
+  };
+  void f(typename Inner::type);
+};
+
+Template2<float> xf2;
+
+struct Y2 {
+  void g(Template2<double>::Inner::type) {}
+  void h(Template2<int>::Inner::type) {}
+};
+
+struct Z2: Template2<char> {
+  void one(Inner::type);
+};
+)CODE");
+
+
+   auto checkClass = [](const char *className, std::unordered_map<std::string, std::string> funcPar0) {
+      TClass *cl = TClass::GetClass(className);
+      ASSERT_NE(cl, nullptr);
+      TListOfFunctions *methods = (TListOfFunctions *)cl->GetListOfMethods();
+      for (TMethod *method : TRangeDynCast<TMethod>(methods)) {
+         auto args = method->GetListOfMethodArgs();
+         if (args->GetSize() != 1)
+            continue;
+         auto arg0 = (TMethodArg*) args->At(0);
+         auto iExpected = funcPar0.find(std::string(method->GetName()));
+         if (iExpected == funcPar0.end())
+            continue;
+         EXPECT_EQ(iExpected->second, arg0->GetFullTypeName())
+            << " in function " << className << "::" << method->GetName();
+         funcPar0.erase(iExpected);
+      }
+      EXPECT_EQ(funcPar0.size(), 0);
+   };
+   checkClass("Template1<float>", {
+      {"f0", "Template1<float>::type1"},
+      {"f1", "Template1<float>::type1*"},
+      {"g0", "Template1<float>::type2"},
+      {"g1", "Template1<float>::type2*"},
+      {"g2", "AScope::TheType"},
+      {"g3", "AScope::TheType*"}});
+
+   // This one was giving "Template1<float>::type1" before:
+   checkClass("Template1<short>", {
+      {"f0", "Template1<short>::type1"},
+      {"f1", "Template1<short>::type1*"},
+      {"g0", "Template1<short>::type2"},
+      {"g1", "Template1<short>::type2*"},
+      {"g2", "AScope::TheType"},
+      {"g3", "AScope::TheType*"}});
+
+   checkClass("TAlias1<long>", {
+      {"f0", "Template1<long>::type1"},
+      {"f1", "Template1<long>::type1*"},
+      {"g0", "Template1<long>::type2"},
+      {"g1", "Template1<long>::type2*"},
+      {"g2", "AScope::TheType"},
+      {"g3", "AScope::TheType*"}});
+
+   checkClass("X1", {
+      {"f1", "Template1<double>::type1"},
+      {"f2", "Template1<double>::type2"},
+      {"g1", "Template1<int>::type1"},
+      {"g2", "Template1<int>::type2"}});
+
+   checkClass("Y1", {
+      {"yf1", "Template1<char>::type1"},
+      {"yf2", "Template1<char>::type2"},
+      {"yf3", "AScope::TheType"}});
+   
+   checkClass("Z1", {
+      {"f1", "Template1<double>::type1"},
+      {"f2", "Template1<double>::type2"},
+      {"g1", "Template1<int>::type1"},
+      {"g2", "Template1<int>::type2"}});
+   
+   checkClass("Template2<float>", {
+      {"f", "Template2<float>::Inner::type"}});
+
+   checkClass("Template2<short>", {
+      {"f", "Template2<short>::Inner::type"}});
+
+   checkClass("Y2", {
+      {"g", "Template2<double>::Inner::type"},
+      {"h", "Template2<int>::Inner::type"}});
+
+   checkClass("Z2", {
+      {"one", "Template2<char>::Inner::type"}});
+}
diff --git a/core/metacling/test/TClingTests.cxx b/core/metacling/test/TClingTests.cxx
index 674ec865c761e..c94cc0815f7f7 100644
--- a/core/metacling/test/TClingTests.cxx
+++ b/core/metacling/test/TClingTests.cxx
@@ -4,6 +4,8 @@
 #include "TInterpreter.h"
 #include "TROOT.h"
 #include "TSystem.h"
+#include "TMethod.h"
+#include "TMethodArg.h"
 
 #include "gmock/gmock.h"
 
@@ -364,3 +366,13 @@ auto val2 = Ln10_pushforward();
    EXPECT_DOUBLE_EQ(2.3025850929940459, val1);
    EXPECT_DOUBLE_EQ(2.3025850929940459, val2);
 }
+
+// https://github.com/root-project/root/issues/7955
+TEST(ClingAST, Issue7955) 
+{
+  auto cls = TClass::GetClass("std::vector<int>");
+  auto meth = cls->GetMethodWithPrototype("operator[]","int",true, ROOT::kConversionMatch);
+  auto args = meth->GetListOfMethodArgs();
+  auto methArg = dynamic_cast<TMethodArg*>(args->First());
+  EXPECT_STREQ(methArg->GetTypeName(), "vector<int>::size_type");
+}
diff --git a/interpreter/cling/include/cling/Utils/AST.h b/interpreter/cling/include/cling/Utils/AST.h
index c287626299b4c..46d2a32f72804 100644
--- a/interpreter/cling/include/cling/Utils/AST.h
+++ b/interpreter/cling/include/cling/Utils/AST.h
@@ -16,6 +16,7 @@
 
 namespace clang {
   class ASTContext;
+  class ClassTemplateSpecializationDecl;
   class Expr;
   class Decl;
   class DeclContext;
@@ -301,7 +302,8 @@ namespace utils {
     /// returned.
     ///\param[in] Ctx - the ASTContext to be used.
     clang::QualType GetFullyQualifiedType(clang::QualType QT,
-                                          const clang::ASTContext& Ctx);
+                                          const clang::ASTContext& Ctx,
+                  const clang::ClassTemplateSpecializationDecl* Spec = nullptr);
 
     ///\brief Get the fully qualified name for a type. This includes full
     /// qualification of all template parameters etc.
@@ -310,7 +312,8 @@ namespace utils {
     /// returned.
     ///\param[in] Ctx - the ASTContext to be used.
     std::string GetFullyQualifiedName(clang::QualType QT,
-                                      const clang::ASTContext &Ctx);
+                                      const clang::ASTContext &Ctx,
+                  const clang::ClassTemplateSpecializationDecl* Spec = nullptr);
 
     ///\brief Create a NestedNameSpecifier for Namesp and its enclosing
     /// scopes.
@@ -332,7 +335,8 @@ namespace utils {
     /// qualified names.
     clang::NestedNameSpecifier*
     CreateNestedNameSpecifier(const clang::ASTContext& Ctx,
-                              const clang::TagDecl *TD, bool FullyQualify);
+                              const clang::TagDecl *TD, bool FullyQualify,
+                  const clang::ClassTemplateSpecializationDecl* Spec = nullptr);
 
     ///\brief Create a NestedNameSpecifier for TypedefDecl and its enclosing
     /// scopes.
@@ -345,7 +349,8 @@ namespace utils {
     clang::NestedNameSpecifier*
     CreateNestedNameSpecifier(const clang::ASTContext& Ctx,
                               const clang::TypedefNameDecl *TD,
-                              bool FullyQualify);
+                              bool FullyQualify,
+                  const clang::ClassTemplateSpecializationDecl* Spec = nullptr);
 
     ///\brief Create a NestedNameSpecifier for UsingShadowDecl and its enclosing
     /// scopes.
@@ -358,7 +363,8 @@ namespace utils {
     clang::NestedNameSpecifier*
     CreateNestedNameSpecifier(const clang::ASTContext& Ctx,
                               const clang::UsingShadowDecl *USD,
-                              bool FullyQualify);
+                              bool FullyQualify,
+                  const clang::ClassTemplateSpecializationDecl* Spec = nullptr);
 
   } // end namespace TypeName
 } // end namespace utils
diff --git a/interpreter/cling/lib/Interpreter/ForwardDeclPrinter.cpp b/interpreter/cling/lib/Interpreter/ForwardDeclPrinter.cpp
index 80aba72672e90..7b6519f5f656f 100644
--- a/interpreter/cling/lib/Interpreter/ForwardDeclPrinter.cpp
+++ b/interpreter/cling/lib/Interpreter/ForwardDeclPrinter.cpp
@@ -113,7 +113,9 @@ namespace cling {
   }
 
   void ForwardDeclPrinter::Visit(clang::QualType QT) {
-    QT = utils::TypeName::GetFullyQualifiedType(QT, m_Ctx);
+    QT = utils::TypeName::GetFullyQualifiedType(QT, m_Ctx,
+                                            m_SpecContextStack.empty() ? nullptr
+                                                : m_SpecContextStack.top());
     Visit(QT.getTypePtr());
   }
 
@@ -938,7 +940,9 @@ namespace cling {
         }
         if (!ArgQT.isNull()) {
           QualType ArgFQQT
-            = utils::TypeName::GetFullyQualifiedType(ArgQT, m_Ctx);
+            = utils::TypeName::GetFullyQualifiedType(ArgQT, m_Ctx,
+                                            m_SpecContextStack.empty() ? nullptr
+                                                    : m_SpecContextStack.top());
           Visit(ArgFQQT);
           if (m_SkipFlag) {
             skipDecl(nullptr, "type template param default failed");
@@ -1094,6 +1098,19 @@ namespace cling {
 //      return;
 //    }
 
+    struct PopStackRAII{
+      std::stack<ClassTemplateSpecializationDecl*> &m_Stk;
+      PopStackRAII(std::stack<ClassTemplateSpecializationDecl*> &stk,
+                   ClassTemplateSpecializationDecl* D):
+      m_Stk(stk)
+      {
+        m_Stk.push(D);
+      }
+      ~PopStackRAII() {
+        m_Stk.pop();
+      }
+    } popStackRAII(m_SpecContextStack, D);
+
     const TemplateArgumentList& iargs = D->getTemplateInstantiationArgs();
     for (const TemplateArgument& TA: iargs.asArray()) {
        VisitTemplateArgument(TA);
diff --git a/interpreter/cling/lib/Interpreter/ForwardDeclPrinter.h b/interpreter/cling/lib/Interpreter/ForwardDeclPrinter.h
index abe241867bed5..3392e27d01d46 100644
--- a/interpreter/cling/lib/Interpreter/ForwardDeclPrinter.h
+++ b/interpreter/cling/lib/Interpreter/ForwardDeclPrinter.h
@@ -107,6 +107,7 @@ namespace cling {
 
     llvm::DenseMap<const clang::Decl*, bool> m_Visited; // fwd decl success
     std::stack<llvm::raw_ostream*> m_StreamStack;
+    std::stack<clang::ClassTemplateSpecializationDecl*> m_SpecContextStack;
     std::set<llvm::StringRef> m_BuiltinNames;
     IgnoreFilesFunc_t m_IgnoreFile; // Call back to ignore some top level files.
 
diff --git a/interpreter/cling/lib/Utils/AST.cpp b/interpreter/cling/lib/Utils/AST.cpp
index ef34d9595c710..d41fc821ed7aa 100644
--- a/interpreter/cling/lib/Utils/AST.cpp
+++ b/interpreter/cling/lib/Utils/AST.cpp
@@ -48,7 +48,8 @@ namespace utils {
                                          QualType QT,
                                const Transform::Config& TypeConfig,
                                          bool fullyQualifyType,
-                                         bool fullyQualifyTmpltArg);
+                                         bool fullyQualifyTmpltArg,
+                                         const ClassTemplateSpecializationDecl* Spec);
 
   static
   NestedNameSpecifier* GetPartiallyDesugaredNNS(const ASTContext& Ctx,
@@ -58,11 +59,12 @@ namespace utils {
   static NestedNameSpecifier*
   CreateNestedNameSpecifierForScopeOf(const ASTContext& Ctx,
                                       const Decl *decl,
-                                      bool FullyQualified);
+                                      bool FullyQualified,
+                                      const ClassTemplateSpecializationDecl* Spec);
 
   static
   NestedNameSpecifier* GetFullyQualifiedNameSpecifier(const ASTContext& Ctx,
-                                                      NestedNameSpecifier* scope);
+                                                      NestedNameSpecifier& scope);
 
   bool Analyze::IsWrapper(const FunctionDecl* ND) {
     if (!ND)
@@ -196,7 +198,8 @@ namespace utils {
   }
 
   static bool
-  GetFullyQualifiedTemplateName(const ASTContext& Ctx, TemplateName &tname) {
+  GetFullyQualifiedTemplateName(const ASTContext& Ctx, TemplateName &tname,
+                                const ClassTemplateSpecializationDecl* Spec) {
 
     bool changed = false;
     NestedNameSpecifier *NNS = nullptr;
@@ -206,7 +209,7 @@ namespace utils {
 
     if (qtname && !qtname->hasTemplateKeyword()) {
       NNS = qtname->getQualifier();
-      NestedNameSpecifier *qNNS = GetFullyQualifiedNameSpecifier(Ctx,NNS);
+      NestedNameSpecifier *qNNS = GetFullyQualifiedNameSpecifier(Ctx, *NNS);
       if (qNNS != NNS) {
         changed = true;
         NNS = qNNS;
@@ -214,7 +217,7 @@ namespace utils {
         NNS = nullptr;
       }
     } else {
-      NNS = CreateNestedNameSpecifierForScopeOf(Ctx, argtdecl, true);
+      NNS = CreateNestedNameSpecifierForScopeOf(Ctx, argtdecl, true, Spec);
     }
     if (NNS) {
       TemplateName UnderlyingTN(argtdecl);
@@ -230,6 +233,7 @@ namespace utils {
 
   static bool
   GetFullyQualifiedTemplateArgument(const ASTContext& Ctx,
+                                    const ClassTemplateSpecializationDecl* Spec,
                                     TemplateArgument &arg) {
     bool changed = false;
 
@@ -239,14 +243,14 @@ namespace utils {
 
     if (arg.getKind() == TemplateArgument::Template) {
       TemplateName tname = arg.getAsTemplate();
-      changed = GetFullyQualifiedTemplateName(Ctx, tname);
+      changed = GetFullyQualifiedTemplateName(Ctx, tname, Spec);
       if (changed) {
         arg = TemplateArgument(tname);
       }
     } else if (arg.getKind() == TemplateArgument::Type) {
       QualType SubTy = arg.getAsType();
       // Check if the type needs more desugaring and recurse.
-      QualType QTFQ = TypeName::GetFullyQualifiedType(SubTy, Ctx);
+      QualType QTFQ = TypeName::GetFullyQualifiedType(SubTy, Ctx, Spec);
       if (QTFQ != SubTy) {
         arg = TemplateArgument(QTFQ);
         changed = true;
@@ -255,7 +259,7 @@ namespace utils {
       SmallVector<TemplateArgument, 2> desArgs;
       for (auto I = arg.pack_begin(), E = arg.pack_end(); I != E; ++I) {
         TemplateArgument pack_arg(*I);
-        changed = GetFullyQualifiedTemplateArgument(Ctx,pack_arg);
+        changed = GetFullyQualifiedTemplateArgument(Ctx, Spec, pack_arg);
         desArgs.push_back(pack_arg);
       }
       if (changed) {
@@ -271,6 +275,7 @@ namespace utils {
 
   static const Type*
   GetFullyQualifiedLocalType(const ASTContext& Ctx,
+                             const ClassTemplateSpecializationDecl* Spec,
                              const Type *typeptr) {
     // We really just want to handle the template parameter if any ....
     // In case of template specializations iterate over the arguments and
@@ -284,7 +289,7 @@ namespace utils {
         // cheap to copy and potentially modified by
         // GetFullyQualifedTemplateArgument
         TemplateArgument CopiedArg = Arg;
-        mightHaveChanged |= GetFullyQualifiedTemplateArgument(Ctx, CopiedArg);
+        mightHaveChanged |= GetFullyQualifiedTemplateArgument(Ctx, Spec, CopiedArg);
         desArgs.push_back(CopiedArg);
       }
 
@@ -316,7 +321,8 @@ namespace utils {
             // cheap to copy and potentially modified by
             // GetFullyQualifedTemplateArgument
             TemplateArgument arg(templateArgs[I]);
-            mightHaveChanged |= GetFullyQualifiedTemplateArgument(Ctx,arg);
+            mightHaveChanged
+              |= GetFullyQualifiedTemplateArgument(Ctx, Spec, arg);
             desArgs.push_back(arg);
 
           }
@@ -336,7 +342,9 @@ namespace utils {
 
   static NestedNameSpecifier* CreateOuterNNS(const ASTContext& Ctx,
                                              const Decl* D,
-                                             bool FullyQualify) {
+                                             bool FullyQualify,
+                                    const ClassTemplateSpecializationDecl* Spec)
+  {
     const DeclContext* DC = D->getDeclContext();
     if (const NamespaceDecl* NS = dyn_cast<NamespaceDecl>(DC)) {
       while (NS && NS->isInline()) {
@@ -347,23 +355,24 @@ namespace utils {
         return TypeName::CreateNestedNameSpecifier(Ctx, NS);
       return nullptr; // no starting '::', no anonymous
     } else if (const TagDecl* TD = dyn_cast<TagDecl>(DC)) {
-      return TypeName::CreateNestedNameSpecifier(Ctx, TD, FullyQualify);
+      return TypeName::CreateNestedNameSpecifier(Ctx, TD, FullyQualify, Spec);
     } else if (const TypedefNameDecl* TDD = dyn_cast<TypedefNameDecl>(DC)) {
-      return TypeName::CreateNestedNameSpecifier(Ctx, TDD, FullyQualify);
+      return TypeName::CreateNestedNameSpecifier(Ctx, TDD, FullyQualify, Spec);
     }
     return nullptr; // no starting '::'
   }
 
   static
   NestedNameSpecifier* GetFullyQualifiedNameSpecifier(const ASTContext& Ctx,
-                                                  NestedNameSpecifier* scope) {
+                                                  NestedNameSpecifier& scope)
+  {
     // Return a fully qualified version of this name specifier
-    if (scope->getKind() == NestedNameSpecifier::Global) {
+    if (scope.getKind() == NestedNameSpecifier::Global) {
       // Already fully qualified.
-      return scope;
+      return &scope;
     }
 
-    if (const Type *type = scope->getAsType()) {
+    if (const Type *type = scope.getAsType()) {
       // Find decl context.
       const TagDecl* TD = nullptr;
       if (const TagType* tagdecltype = dyn_cast<TagType>(type)) {
@@ -373,29 +382,32 @@ namespace utils {
       }
       if (TD) {
         return TypeName::CreateNestedNameSpecifier(Ctx, TD,
-                                                   true /*FullyQualified*/);
+                                                   true /*FullyQualified*/,
+                                                   /*Spec*/ nullptr);
       } else if (const TypedefType* TDD = dyn_cast<TypedefType>(type)) {
         return TypeName::CreateNestedNameSpecifier(Ctx, TDD->getDecl(),
-                                                   true /*FullyQualified*/);
+                                                   true /*FullyQualified*/,
+                                                   /*Spec*/ nullptr);
       } else if (const UsingType* UT = dyn_cast<UsingType>(type)) {
         return TypeName::CreateNestedNameSpecifier(Ctx, UT->getFoundDecl(),
                                                    true /*FullyQualified*/);
       }
-    } else if (const NamespaceDecl* NS = scope->getAsNamespace()) {
+    } else if (const NamespaceDecl* NS = scope.getAsNamespace()) {
       return TypeName::CreateNestedNameSpecifier(Ctx, NS);
-    } else if (const NamespaceAliasDecl* alias = scope->getAsNamespaceAlias()) {
+    } else if (const NamespaceAliasDecl* alias = scope.getAsNamespaceAlias()) {
       const NamespaceDecl* CanonNS = alias->getNamespace()->getCanonicalDecl();
       return TypeName::CreateNestedNameSpecifier(Ctx, CanonNS);
     }
 
-    return scope;
+    return &scope;
   }
 
   static
   NestedNameSpecifier* SelectPrefix(const ASTContext& Ctx,
                                     const DeclContext *declContext,
                                     NestedNameSpecifier *original_prefix,
-                             const Transform::Config& TypeConfig) {
+                                    const Transform::Config& TypeConfig)
+  {
     // We have to also desugar the prefix.
     NestedNameSpecifier* prefix = nullptr;
     if (declContext) {
@@ -420,7 +432,8 @@ namespace utils {
           if (old_ns == new_ns) {
             // This is the same namespace, use the original prefix
             // as a starting point.
-            prefix = GetFullyQualifiedNameSpecifier(Ctx,original_prefix);
+            assert(original_prefix && "Must have original_prefix!");
+            prefix = GetFullyQualifiedNameSpecifier(Ctx, *original_prefix);
           } else {
             prefix = TypeName::CreateNestedNameSpecifier(Ctx,
                                                dyn_cast<NamespaceDecl>(new_ns));
@@ -442,7 +455,8 @@ namespace utils {
             const TagDecl *tdecl = dyn_cast<TagDecl>(declContext);
             if (tdecl) {
               prefix = TypeName::CreateNestedNameSpecifier(Ctx, tdecl,
-                                                      false /*FullyQualified*/);
+                                                      false /*FullyQualified*/,
+                                                      nullptr /*Spec*/);
             }
           }
         } else {
@@ -452,12 +466,13 @@ namespace utils {
           const TagDecl *tdecl = dyn_cast<TagDecl>(declContext);
           if (tdecl) {
             prefix = TypeName::CreateNestedNameSpecifier(Ctx,tdecl,
-                                                      false /*FullyQualified*/);
+                                                      false /*FullyQualified*/,
+                                                      nullptr /*Spec*/);
           }
         }
       }
     } else {
-      prefix = GetFullyQualifiedNameSpecifier(Ctx,original_prefix);
+      prefix = GetFullyQualifiedNameSpecifier(Ctx, *original_prefix);
     }
     return prefix;
   }
@@ -466,7 +481,8 @@ namespace utils {
   NestedNameSpecifier* SelectPrefix(const ASTContext& Ctx,
                                     const ElaboratedType *etype,
                                     NestedNameSpecifier *original_prefix,
-                             const Transform::Config& TypeConfig) {
+                                    const Transform::Config& TypeConfig)
+  {
     // We have to also desugar the prefix.
 
     NestedNameSpecifier* prefix = etype->getQualifier();
@@ -512,12 +528,12 @@ namespace utils {
           if (old_ns == new_ns) {
             // This is the same namespace, use the original prefix
             // as a starting point.
-            prefix = GetFullyQualifiedNameSpecifier(Ctx,original_prefix);
+            prefix = GetFullyQualifiedNameSpecifier(Ctx, *original_prefix);
           } else {
-            prefix = GetFullyQualifiedNameSpecifier(Ctx,prefix);
+            prefix = GetFullyQualifiedNameSpecifier(Ctx, *prefix);
           }
         } else {
-          prefix = GetFullyQualifiedNameSpecifier(Ctx,prefix);
+          prefix = GetFullyQualifiedNameSpecifier(Ctx, *prefix);
         }
       }
     }
@@ -538,7 +554,8 @@ namespace utils {
                                                          QualType(scope_type,0),
                                                          TypeConfig,
                                                          /*qualifyType=*/false,
-                                                      /*qualifyTmpltArg=*/true);
+                                                      /*qualifyTmpltArg=*/true,
+                                                         nullptr /*Spec*/);
 
       NestedNameSpecifier* outer_scope = scope->getPrefix();
       const ElaboratedType* etype
@@ -596,7 +613,7 @@ namespace utils {
                                          false /* template keyword wanted */,
                                          desugared.getTypePtr());
     } else {
-      return  GetFullyQualifiedNameSpecifier(Ctx,scope);
+      return GetFullyQualifiedNameSpecifier(Ctx, *scope);
     }
   }
 
@@ -841,13 +858,14 @@ namespace utils {
   static bool GetPartiallyDesugaredTypeImpl(const ASTContext& Ctx,
                                             TemplateArgument &arg,
                                             const Transform::Config& TypeConfig,
-                                            bool fullyQualifyTmpltArg) {
+                                            bool fullyQualifyTmpltArg,
+                                            const ClassTemplateSpecializationDecl* Spec) {
     bool changed = false;
 
     if (arg.getKind() == TemplateArgument::Template) {
       TemplateName tname = arg.getAsTemplate();
       // Note: should we not also desugar?
-      changed = GetFullyQualifiedTemplateName(Ctx, tname);
+      changed = GetFullyQualifiedTemplateName(Ctx, tname, Spec);
       if (changed) {
         arg = TemplateArgument(tname);
       }
@@ -864,7 +882,7 @@ namespace utils {
         QualType PDQT
               = GetPartiallyDesugaredTypeImpl(Ctx, SubTy, TypeConfig,
                     /*fullyQualifyType=*/true,
-                    /*fullyQualifyTmpltArg=*/true);
+                    /*fullyQualifyTmpltArg=*/true, Spec);
         arg = TemplateArgument(PDQT);
       }
     } else if (arg.getKind() == TemplateArgument::Pack) {
@@ -873,7 +891,7 @@ namespace utils {
         TemplateArgument pack_arg(*I);
         changed = GetPartiallyDesugaredTypeImpl(Ctx,pack_arg,
                                                 TypeConfig,
-                                                fullyQualifyTmpltArg);
+                                                fullyQualifyTmpltArg, Spec);
         desArgs.push_back(pack_arg);
       }
       if (changed) {
@@ -927,7 +945,8 @@ namespace utils {
 
   static QualType GetPartiallyDesugaredTypeImpl(const ASTContext& Ctx,
     QualType QT, const Transform::Config& TypeConfig,
-    bool fullyQualifyType, bool fullyQualifyTmpltArg)
+    bool fullyQualifyType, bool fullyQualifyTmpltArg,
+    const ClassTemplateSpecializationDecl* Spec)
   {
     if (QT.isNull())
       return QT;
@@ -942,7 +961,8 @@ namespace utils {
       Qualifiers quals = QT.getQualifiers();
       QualType nQT;
       nQT = GetPartiallyDesugaredTypeImpl(Ctx, QT->getPointeeType(), TypeConfig,
-                                          fullyQualifyType,fullyQualifyTmpltArg);
+                                          fullyQualifyType,fullyQualifyTmpltArg,
+                                          Spec);
       if (nQT == QT->getPointeeType()) return QT;
 
       QT = Ctx.getPointerType(nQT);
@@ -969,7 +989,8 @@ namespace utils {
       Qualifiers quals = QT.getQualifiers();
       QualType nQT;
       nQT = GetPartiallyDesugaredTypeImpl(Ctx, QT->getPointeeType(), TypeConfig,
-                                         fullyQualifyType,fullyQualifyTmpltArg);
+                                         fullyQualifyType,fullyQualifyTmpltArg,
+                                         Spec);
       if (nQT == QT->getPointeeType()) return QT;
 
       // Add the r- or l-value reference type back to the desugared one.
@@ -993,7 +1014,8 @@ namespace utils {
           = dyn_cast<ConstantArrayType>(QT.getTypePtr());
         QualType newQT
            = GetPartiallyDesugaredTypeImpl(Ctx,arr->getElementType(), TypeConfig,
-                                         fullyQualifyType,fullyQualifyTmpltArg);
+                                         fullyQualifyType,fullyQualifyTmpltArg,
+                                         Spec);
         if (newQT == arr->getElementType()) return QT;
         QT = Ctx.getConstantArrayType (newQT,
                                        arr->getSize(),
@@ -1006,7 +1028,8 @@ namespace utils {
           = dyn_cast<DependentSizedArrayType>(QT.getTypePtr());
         QualType newQT
           = GetPartiallyDesugaredTypeImpl(Ctx,arr->getElementType(), TypeConfig,
-                                          fullyQualifyType,fullyQualifyTmpltArg);
+                                          fullyQualifyType,fullyQualifyTmpltArg,
+                                          Spec);
         if (newQT == QT) return QT;
         QT = Ctx.getDependentSizedArrayType (newQT,
                                             arr->getSizeExpr(),
@@ -1019,7 +1042,8 @@ namespace utils {
           = dyn_cast<IncompleteArrayType>(QT.getTypePtr());
         QualType newQT
           = GetPartiallyDesugaredTypeImpl(Ctx,arr->getElementType(), TypeConfig,
-                                          fullyQualifyType,fullyQualifyTmpltArg);
+                                          fullyQualifyType,fullyQualifyTmpltArg,
+                                          Spec);
         if (newQT == arr->getElementType()) return QT;
         QT = Ctx.getIncompleteArrayType (newQT,
                                          arr->getSizeModifier(),
@@ -1030,7 +1054,8 @@ namespace utils {
           = dyn_cast<VariableArrayType>(QT.getTypePtr());
         QualType newQT
           = GetPartiallyDesugaredTypeImpl(Ctx,arr->getElementType(), TypeConfig,
-                                          fullyQualifyType,fullyQualifyTmpltArg);
+                                          fullyQualifyType,fullyQualifyTmpltArg,
+                                          Spec);
         if (newQT == arr->getElementType()) return QT;
         QT = Ctx.getVariableArrayType (newQT,
                                        arr->getSizeExpr(),
@@ -1115,7 +1140,8 @@ namespace utils {
         isa<ArrayType>(QT.getTypePtr())) {
       return GetPartiallyDesugaredTypeImpl(Ctx, QT, TypeConfig,
                                            fullyQualifyType,
-                                           fullyQualifyTmpltArg);
+                                           fullyQualifyTmpltArg,
+                                           Spec);
     }
 
     NestedNameSpecifier* prefix = nullptr;
@@ -1183,7 +1209,7 @@ namespace utils {
               if (old_ns == new_ns) {
                 // This is the same namespace, use the original prefix
                 // as a starting point.
-                prefix = GetFullyQualifiedNameSpecifier(Ctx,original_prefix);
+                prefix = GetFullyQualifiedNameSpecifier(Ctx, *original_prefix);
                 outer = nullptr; // Cancel the later creation.
               }
             }
@@ -1203,7 +1229,8 @@ namespace utils {
               TagDecl *tdecl = dyn_cast<TagDecl>(outer);
               if (tdecl) {
                 prefix = TypeName::CreateNestedNameSpecifier(Ctx,tdecl,
-                                                      false /*FullyQualified*/);
+                                                      false /*FullyQualified*/,
+                                                      Spec);
                 prefix = GetPartiallyDesugaredNNS(Ctx,prefix,TypeConfig);
               }
             }
@@ -1246,7 +1273,8 @@ namespace utils {
         // So for now just return move on with the least lose we can do
         return GetPartiallyDesugaredTypeImpl(Ctx, targetType, TypeConfig,
                                            fullyQualifyType,
-                                           fullyQualifyTmpltArg);
+                                           fullyQualifyTmpltArg,
+                                           Spec);
       }
 
       bool mightHaveChanged = false;
@@ -1284,7 +1312,7 @@ namespace utils {
         if (I->getKind() == TemplateArgument::Template) {
           TemplateName tname = I->getAsTemplate();
           // Note: should we not also desugar?
-          bool changed = GetFullyQualifiedTemplateName(Ctx, tname);
+          bool changed = GetFullyQualifiedTemplateName(Ctx, tname, Spec);
           if (changed) {
             desArgs.push_back(TemplateArgument(tname));
             mightHaveChanged = true;
@@ -1308,7 +1336,8 @@ namespace utils {
           QualType PDQT
             = GetPartiallyDesugaredTypeImpl(Ctx, SubTy, TypeConfig,
                                             fullyQualifyType,
-                                            fullyQualifyTmpltArg);
+                                            fullyQualifyTmpltArg,
+                                            Spec);
           mightHaveChanged |= (SubTy != PDQT);
           desArgs.push_back(TemplateArgument(PDQT));
         } else {
@@ -1344,13 +1373,13 @@ namespace utils {
               I != E; ++I) {
 
 #if 1
-
             // cheap to copy and potentially modified by
             // GetPartiallyDesugaredTypeImpl
             TemplateArgument arg(templateArgs[I]);
             mightHaveChanged |= GetPartiallyDesugaredTypeImpl(Ctx,arg,
                                                               TypeConfig,
-                                                          fullyQualifyTmpltArg);
+                                                           fullyQualifyTmpltArg,
+                                                              Spec);
             desArgs.push_back(arg);
 #else
             if (templateArgs[I].getKind() == TemplateArgument::Template) {
@@ -1381,7 +1410,8 @@ namespace utils {
               QualType PDQT
                 = GetPartiallyDesugaredTypeImpl(Ctx, SubTy, TypeConfig,
                                                 /*fullyQualifyType=*/true,
-                                                /*fullyQualifyTmpltArg=*/true);
+                                                /*fullyQualifyTmpltArg=*/true,
+                                                Spec);
               desArgs.push_back(TemplateArgument(PDQT));
             } else {
               desArgs.push_back(templateArgs[I]);
@@ -1419,7 +1449,8 @@ namespace utils {
   {
     return GetPartiallyDesugaredTypeImpl(Ctx,QT,TypeConfig,
                                          /*qualifyType*/fullyQualify,
-                                         /*qualifyTmpltArg*/fullyQualify);
+                                         /*qualifyTmpltArg*/fullyQualify,
+                                         nullptr /*Spec*/);
   }
 
   NamespaceDecl* Lookup::Namespace(Sema* S, const char* Name,
@@ -1508,55 +1539,63 @@ namespace utils {
   static NestedNameSpecifier*
   CreateNestedNameSpecifierForScopeOf(const ASTContext& Ctx,
                                       const Decl *decl,
-                                      bool FullyQualified)
+                                      bool FullyQualified,
+                                    const ClassTemplateSpecializationDecl* Spec)
   {
     // Create a nested name specifier for the declaring context of the type.
 
     assert(decl);
 
-    const NamedDecl* outer
-      = llvm::dyn_cast_or_null<NamedDecl>(decl->getDeclContext());
-    const NamespaceDecl* outer_ns
-      = llvm::dyn_cast_or_null<NamespaceDecl>(decl->getDeclContext());
-    if (outer && !(outer_ns && outer_ns->isAnonymousNamespace())) {
-
-      if (const CXXRecordDecl *cxxdecl
-          = llvm::dyn_cast<CXXRecordDecl>(decl->getDeclContext())) {
-
-        if (ClassTemplateDecl *clTempl = cxxdecl->getDescribedClassTemplate()) {
-          // We are in the case of a type(def) that was declared in a
-          // class template but is *not* type dependent.  In clang, it gets
-          // attached to the class template declaration rather than any
-          // specific class template instantiation.   This result in 'odd'
-          // fully qualified typename:
-          //    vector<_Tp,_Alloc>::size_type
-          // Make the situation is 'useable' but looking a bit odd by
-          // picking a random instance as the declaring context.
-          // FIXME: We should not use the iterators here to check if we are in
-          // a template specialization. clTempl != cxxdecl already tell us that
-          // is the case. It seems that we rely on a side-effect from triggering
-          // deserializations to support 'some' use-case. See ROOT-9709.
-          if (clTempl->spec_begin() != clTempl->spec_end()) {
-            decl = *(clTempl->spec_begin());
-            outer  = llvm::dyn_cast<NamedDecl>(decl);
-            outer_ns = llvm::dyn_cast<NamespaceDecl>(decl);
-          }
+    if (auto outer_ns = llvm::dyn_cast<NamespaceDecl>(decl->getDeclContext())) {
+      if (!outer_ns->isAnonymousNamespace())
+        return TypeName::CreateNestedNameSpecifier(Ctx,outer_ns);
+      return nullptr;
+    }
+
+    auto outer = llvm::dyn_cast<NamedDecl>(decl->getDeclContext());
+    if (!outer)
+      return nullptr;
+
+    if (auto cxxdecl = llvm::dyn_cast<CXXRecordDecl>(outer)) {
+      if (ClassTemplateDecl *clTempl = cxxdecl->getDescribedClassTemplate()) {
+        assert(Spec && "Cannot determine type's scope");
+        while (Spec && clTempl->getCanonicalDecl() !=
+               Spec->getSpecializedTemplate()->getCanonicalDecl()) {
+          // This might be due to
+          //   Spec: A<X>::B<Y>
+          //   decl: A<X>::type
+          // Check Spec's scopes to see if any is a match.
+          Spec = llvm::dyn_cast<ClassTemplateSpecializationDecl>(
+            Spec->getDeclContext());
         }
-      }
 
-      if (outer_ns) {
-        return TypeName::CreateNestedNameSpecifier(Ctx,outer_ns);
-      } else if (const TagDecl* TD = llvm::dyn_cast<TagDecl>(outer)) {
-        return TypeName::CreateNestedNameSpecifier(Ctx, TD, FullyQualified);
+        // We are in the case of a type(def) that was declared in a
+        // class template but is *not* type dependent.  In clang, it gets
+        // attached to the class template declaration rather than any
+        // specific class template instantiation.   This result in 'odd'
+        // fully qualified typename:
+        //    vector<_Tp,_Alloc>::size_type
+        // Make the situation 'useable' by using the provided specialization
+        // as the declaring context.
+        assert(clTempl->getCanonicalDecl()
+                == Spec->getSpecializedTemplate()->getCanonicalDecl()
+                && "incompatible context");
+        outer = Spec;
       }
     }
+
+    if (const TagDecl* TD = llvm::dyn_cast<TagDecl>(outer)) {
+      return TypeName::CreateNestedNameSpecifier(Ctx, TD, FullyQualified,
+                                                  nullptr /*Spec*/);
+    }
     return nullptr;
   }
 
   static NestedNameSpecifier*
   CreateNestedNameSpecifierForScopeOf(const ASTContext& Ctx,
                                       const Type *TypePtr,
-                                      bool FullyQualified)
+                                      bool FullyQualified,
+                                    const ClassTemplateSpecializationDecl* Spec)
   {
     // Create a nested name specifier for the declaring context of the type.
 
@@ -1579,7 +1618,7 @@ namespace utils {
     if (!decl)
       return nullptr;
 
-    return CreateNestedNameSpecifierForScopeOf(Ctx, decl, FullyQualified);
+    return CreateNestedNameSpecifierForScopeOf(Ctx, decl, FullyQualified, Spec);
   }
 
   NestedNameSpecifier*
@@ -1593,16 +1632,19 @@ namespace utils {
 
     bool FullyQualified = true; // doesn't matter, DeclContexts are namespaces
     return NestedNameSpecifier::Create(Ctx, CreateOuterNNS(Ctx, Namesp,
-                                                           FullyQualified),
+                                                           FullyQualified,
+                                                           nullptr /*Spec*/),
                                        Namesp);
   }
 
   NestedNameSpecifier*
   TypeName::CreateNestedNameSpecifier(const ASTContext& Ctx,
                                       const TypedefNameDecl* TD,
-                                      bool FullyQualify) {
+                                      bool FullyQualify,
+                                    const ClassTemplateSpecializationDecl* Spec)
+  {
     return NestedNameSpecifier::Create(Ctx, CreateOuterNNS(Ctx, TD,
-                                                           FullyQualify),
+                                                           FullyQualify, Spec),
                                        true /*Template*/,
                                        TD->getTypeForDecl());
   }
@@ -1610,28 +1652,35 @@ namespace utils {
   NestedNameSpecifier*
   TypeName::CreateNestedNameSpecifier(const ASTContext& Ctx,
                                       const UsingShadowDecl* USD,
-                                      bool FullyQualify) {
+                                      bool FullyQualify,
+                                    const ClassTemplateSpecializationDecl* Spec) {
     return NestedNameSpecifier::Create(Ctx, CreateOuterNNS(Ctx, USD,
-                                                           FullyQualify),
+                                                           FullyQualify, Spec),
                                        true /*Template*/,
                                        cast<TypeDecl>(USD)->getTypeForDecl());
   }
 
   NestedNameSpecifier*
   TypeName::CreateNestedNameSpecifier(const ASTContext& Ctx,
-                                      const TagDecl *TD, bool FullyQualify) {
+                                      const TagDecl *TD,
+                                      bool FullyQualify,
+                                    const ClassTemplateSpecializationDecl* Spec)
+  {
     const Type* Ty
       = Ctx.getTypeDeclType(TD).getTypePtr();
     if (FullyQualify)
-      Ty = GetFullyQualifiedLocalType(Ctx, Ty);
+      Ty = GetFullyQualifiedLocalType(Ctx, Spec, Ty);
     return NestedNameSpecifier::Create(Ctx,
-                                       CreateOuterNNS(Ctx, TD, FullyQualify),
+                                       CreateOuterNNS(Ctx, TD, FullyQualify,
+                                                      Spec),
                                        false /* template keyword wanted */,
                                        Ty);
   }
 
   QualType
-  TypeName::GetFullyQualifiedType(QualType QT, const ASTContext& Ctx) {
+  TypeName::GetFullyQualifiedType(QualType QT, const ASTContext& Ctx,
+                                  const ClassTemplateSpecializationDecl* Spec)
+  {
     // Return the fully qualified type, if we need to recurse through any
     // template parameter, this needs to be merged somehow with
     // GetPartialDesugaredType.
@@ -1641,7 +1690,7 @@ namespace utils {
     if (llvm::isa<PointerType>(QT.getTypePtr())) {
       // Get the qualifiers.
       Qualifiers quals = QT.getQualifiers();
-      QT = GetFullyQualifiedType(QT->getPointeeType(), Ctx);
+      QT = GetFullyQualifiedType(QT->getPointeeType(), Ctx, Spec);
       QT = Ctx.getPointerType(QT);
       // Add back the qualifiers.
       QT = Ctx.getQualifiedType(QT, quals);
@@ -1654,7 +1703,7 @@ namespace utils {
       // Get the qualifiers.
       bool isLValueRefTy = llvm::isa<LValueReferenceType>(QT.getTypePtr());
       Qualifiers quals = QT.getQualifiers();
-      QT = GetFullyQualifiedType(QT->getPointeeType(), Ctx);
+      QT = GetFullyQualifiedType(QT->getPointeeType(), Ctx, Spec);
       // Add the r- or l-value reference type back to the desugared one.
       if (isLValueRefTy)
         QT = Ctx.getLValueReferenceType(QT);
@@ -1668,7 +1717,7 @@ namespace utils {
     // Strip deduced types.
     if (const AutoType* AutoTy = dyn_cast<AutoType>(QT.getTypePtr())) {
       if (!AutoTy->getDeducedType().isNull())
-        return GetFullyQualifiedType(AutoTy->getDeducedType(), Ctx);
+        return GetFullyQualifiedType(AutoTy->getDeducedType(), Ctx, Spec);
     }
 
     // Remove the part of the type related to the type being a template
@@ -1696,7 +1745,9 @@ namespace utils {
         const NamespaceDecl *ns = prefix->getAsNamespace();
         if (prefix != NestedNameSpecifier::GlobalSpecifier(Ctx)
             && !(ns && ns->isAnonymousNamespace())) {
-          prefix = GetFullyQualifiedNameSpecifier(Ctx, prefix);
+          prefix_qualifiers = QT.getLocalQualifiers();
+          prefix = GetFullyQualifiedNameSpecifier(Ctx, *prefix);
+          QT = QualType(etype_input->getNamedType().getTypePtr(),0);
         } else {
           prefix = nullptr;
         }
@@ -1707,7 +1758,8 @@ namespace utils {
       // Create a nested name specifier if needed (i.e. if the decl context
       // is not the global scope.
       prefix = CreateNestedNameSpecifierForScopeOf(Ctx,QT.getTypePtr(),
-                                                   true /*FullyQualified*/);
+                                                   true /*FullyQualified*/,
+                                                   Spec);
 
       // move the qualifiers on the outer type (avoid 'std::const string'!)
       if (prefix) {
@@ -1721,7 +1773,8 @@ namespace utils {
     if(llvm::isa<const TemplateSpecializationType>(QT.getTypePtr())) {
 
       Qualifiers qualifiers = QT.getLocalQualifiers();
-      const Type *TypePtr = GetFullyQualifiedLocalType(Ctx,QT.getTypePtr());
+      const Type *TypePtr
+        = GetFullyQualifiedLocalType(Ctx, Spec, QT.getTypePtr());
       QT = Ctx.getQualifiedType(TypePtr, qualifiers);
 
     } else if (llvm::isa<const RecordType>(QT.getTypePtr())) {
@@ -1730,7 +1783,8 @@ namespace utils {
       // its template argument, however we still need to fully qualify them.
 
       Qualifiers qualifiers = QT.getLocalQualifiers();
-      const Type *TypePtr = GetFullyQualifiedLocalType(Ctx,QT.getTypePtr());
+      const Type *TypePtr
+        = GetFullyQualifiedLocalType(Ctx, Spec, QT.getTypePtr());
       QT = Ctx.getQualifiedType(TypePtr, qualifiers);
 
     }
@@ -1746,8 +1800,9 @@ namespace utils {
   }
 
   std::string TypeName::GetFullyQualifiedName(QualType QT,
-                                              const ASTContext &Ctx) {
-    QualType FQQT = GetFullyQualifiedType(QT, Ctx);
+                                              const ASTContext &Ctx,
+                                  const ClassTemplateSpecializationDecl* Spec) {
+    QualType FQQT = GetFullyQualifiedType(QT, Ctx, Spec);
     PrintingPolicy Policy(Ctx.getPrintingPolicy());
     Policy.SuppressScope = false;
     Policy.AnonymousTagLocations = false;
diff --git a/interpreter/cling/test/AST/typeName.C b/interpreter/cling/test/AST/typeName.C
new file mode 100644
index 0000000000000..22f9f5be226ea
--- /dev/null
+++ b/interpreter/cling/test/AST/typeName.C
@@ -0,0 +1,44 @@
+//------------------------------------------------------------------------------
+// CLING - the C++ LLVM-based InterpreterG :)
+//
+// This file is dual-licensed: you can choose to license it under the University
+// of Illinois Open Source License or the GNU Lesser General Public License. See
+// LICENSE.TXT for details.
+//------------------------------------------------------------------------------
+
+// RUN: cat %s | %cling -I%p | FileCheck %s
+
+// This test covers cling::utils::GetFullyQualifiedName() interfaces.
+// https://github.com/root-project/root/issues/7955
+
+
+#include "cling/Interpreter/Interpreter.h"
+#include "cling/Interpreter/LookupHelper.h"
+#include "cling/Utils/AST.h"
+
+#include "clang/AST/DeclCXX.h"
+#include "clang/AST/DeclTemplate.h"
+
+#include "llvm/Support/Casting.h"
+
+.rawInput 1
+
+template <class T>
+struct Template1 {
+  using type1 = int;
+  void f0(type1);
+};
+
+Template1<float> xf1;
+
+.rawInput 0
+
+const auto& lookup = gCling->getLookupHelper();
+using namespace clang;
+
+auto *T1s = llvm::dyn_cast<ClassTemplateSpecializationDecl>(lookup.findScope("Template1<short>", cling::LookupHelper::WithDiagnostics));
+// Find first function decl:
+auto iFunc = std::find_if(T1s->decls_begin(), T1s->decls_end(),
+  [](const Decl* D) {if (auto FD = llvm::dyn_cast<CXXMethodDecl>(D)) return FD->isUserProvided(); return false;});
+using cling::utils::TypeName::GetFullyQualifiedName;
+GetFullyQualifiedName(llvm::dyn_cast<FunctionDecl>(*iFunc)->getParamDecl(0)->getType(), T1s->getASTContext(), T1s) // CHECK: (std::string) "Template1<short>::type1"