fixup! add bound/variance parameters to TypeVarTuple

Author: KotlinIsland

src/typing_extensions.py

@@ -2571,10 +2571,10 @@ def _unpack_args(*args):
     return newargs
 
 
-if _PEP_696_IMPLEMENTED:
+if sys.version_info < (3, 15):
     from typing import TypeVarTuple
 
-elif hasattr(typing, "TypeVarTuple"):  # 3.11+
+elif hasattr(typing, "TypeVarTuple"):  # < 3.15
 
     # Add default parameter - PEP 696 and bound/variance parameters
     class TypeVarTuple(metaclass=_TypeVarLikeMeta):
@@ -2586,18 +2586,23 @@ def __new__(cls, name, *, bound=None,
                     covariant=False, contravariant=False,
                     infer_variance=False, default=NoDefault):
             if sys.version_info >= (3, 15):
-                # can pass variance arguments to typing.TypeVar
+                # can pass variance and default arguments
                 tvt = typing.TypeVarTuple(name, bound=bound,
                                           covariant=covariant,
                                           contravariant=contravariant,
                                           infer_variance=infer_variance,
                                           default=default)
             else:
-                tvt = typing.TypeVarTuple(name)
+                if _PEP_696_IMPLEMENTED:
+                    # can pass default argument
+                    tvt = typing.TypeVarTuple(name, default=default)
+                else:
+                    tvt = typing.TypeVarTuple(name)
+                    _set_default(tvt, default)
+
                 tvt.__covariant__ = covariant
                 tvt.__contravariant__ = contravariant
                 tvt.__infer_variance__ = infer_variance
-                _set_default(tvt, default)
 
             _set_module(tvt)