1324         Decl *AssociatedDecl, unsigned Index, std::optional<unsigned> PackIndex,
1444                                     std::optional<unsigned> PackIndex);
1636       std::optional<unsigned> PackIndex;  in TransformTemplateName()  local
1649         PackIndex = getPackIndex(Arg);  in TransformTemplateName()
1661           Template, AssociatedDecl, TTP->getIndex(), PackIndex);  in TransformTemplateName()
1722   std::optional<unsigned> PackIndex;  in TransformTemplateParmRefExpr()  local
1745     PackIndex = getPackIndex(Arg);  in TransformTemplateParmRefExpr()
1750                                          Arg, PackIndex);  in TransformTemplateParmRefExpr()
1773     std::optional<unsigned> PackIndex) {  in transformNonTypeTemplateParmRef()  argument
1844       AssociatedDecl, parm->getIndex(), PackIndex, refParam);  in transformNonTypeTemplateParmRef()
2034     Decl *AssociatedDecl, unsigned Index, std::optional<unsigned> PackIndex,  in BuildSubstTemplateTypeParmType()  argument
2054       Replacement, AssociatedDecl, Index, PackIndex);  in BuildSubstTemplateTypeParmType()
2103     std::optional<unsigned> PackIndex;  in TransformTemplateTypeParmType()  local
2121       PackIndex = getPackIndex(Arg);  in TransformTemplateTypeParmType()
2130                                           PackIndex, Arg, TL.getNameLoc());  in TransformTemplateTypeParmType()