Use variadic templates unconditionally in traits/index_sequece.h

and traits/named_object.h

Author: eddelbuettel

ChangeLog

@@ -8,6 +8,8 @@
 	* inst/include/Rcpp/internal/call.h: Idem
 	* inst/include/Rcpp/InternalFunctionWithStdFunction.h: Idem
 	* inst/include/Rcpp/Module.h: Idem
+	* inst/include/Rcpp/traits/index_sequence.h: Idem
+	* inst/include/Rcpp/traits/named_object.h: Idem
 
         * inst/include/Rcpp/module/Module_generated_class_constructor.h: Removed
         * inst/include/Rcpp/module/Module_generated_class_factory.h: Idem

inst/include/Rcpp/traits/index_sequence.h

@@ -1,9 +1,6 @@
 #ifndef RCPP_TRAITS_INDEX_SEQUENCE_H
 #define RCPP_TRAITS_INDEX_SEQUENCE_H
 
-
-#if defined(HAS_VARIADIC_TEMPLATES)
-
 namespace Rcpp {
 namespace traits {
   /**
@@ -23,5 +20,3 @@ namespace traits {
 }
 
 #endif
-
-#endif

inst/include/Rcpp/traits/named_object.h

@@ -2,7 +2,7 @@
 // named_object.h: Rcpp R/C++ interface class library -- named SEXP
 //
 // Copyright (C) 2010 - 2020  Dirk Eddelbuettel and Romain Francois
-// Copyright (C) 2021         Dirk Eddelbuettel, Romain Francois and Iñaki Ucar
+// Copyright (C) 2021 - 2025  Dirk Eddelbuettel, Romain Francois and Iñaki Ucar
 //
 // This file is part of Rcpp.
 //
@@ -65,18 +65,15 @@ template <typename T> struct is_named : public false_type{};
 template <typename T> struct is_named< named_object<T> > : public true_type {};
 template <> struct is_named< Rcpp::Argument > : public true_type {};
 
+template <typename... T> struct is_any_named : public false_type {};
+template <typename T> struct is_any_named<T> : public is_named<T>::type {};
 
-#if defined(HAS_VARIADIC_TEMPLATES)
-    template <typename... T> struct is_any_named : public false_type {};
-    template <typename T> struct is_any_named<T> : public is_named<T>::type {};
-
-    template <typename T, typename... TArgs>
-    struct is_any_named<T, TArgs...>
-        : public std::conditional<
-                    is_any_named<T>::value,
-                    std::true_type,
-                    is_any_named<TArgs...>>::type {};
-#endif
+template <typename T, typename... TArgs>
+struct is_any_named<T, TArgs...>
+    : public std::conditional<
+    is_any_named<T>::value,
+    std::true_type,
+    is_any_named<TArgs...>>::type {};
 
 } // namespace traits
 } // namespace Rcpp