Add handling of nested generic tuples

test/completion/pep0484_generic_parameters.py

@@ -6,6 +6,7 @@ from typing import (
     Iterable,
     List,
     Mapping,
+    Tuple,
     Type,
     TypeVar,
     Union,
@@ -59,6 +60,28 @@ for b in list_type_t_to_list_t(list_of_int_type):
     b
 
 
+def list_tuple_t_to_tuple_list_t(the_list: List[Tuple[T]]) -> Tuple[List[T], ...]:
+    return tuple(list(x) for x in the_list)
+
+
+list_of_int_tuples = [(x,) for x in list_of_ints]  # type: List[Tuple[int]]
+
+for b in list_tuple_t_to_tuple_list_t(list_of_int_tuples):
+    #? int()
+    b[0]
+
+
+def list_tuple_t_elipsis_to_tuple_list_t(the_list: List[Tuple[T, ...]]) -> Tuple[List[T], ...]:
+    return tuple(list(x) for x in the_list)
+
+
+list_of_int_tuples = [tuple(list_of_ints)]  # type: List[Tuple[int, ...]]
+
+for b in list_tuple_t_elipsis_to_tuple_list_t(list_of_int_tuples):
+    #? int()
+    b[0]
+
+
 def foo(x: T) -> T:
     return x