Issue #17: More work on minimizing code for InitVar.

dataclasses.py

@@ -70,8 +70,6 @@ class TypingMeta(type):
  constructs is done in __new__) and a nicer repr().
  """
 
- _is_protocol = False
-
  def __new__(cls, name, bases, namespace, *, _root=False):
  if not _root:
  raise TypeError("Cannot subclass %s" %
@@ -81,19 +79,6 @@ def __new__(cls, name, bases, namespace, *, _root=False):
  def __init__(self, *args, **kwds):
  pass
 
- def _eval_type(self, globalns, localns):
- """Override this in subclasses to interpret forward references.
-
- For example, List['C'] is internally stored as
- List[_ForwardRef('C')], which should evaluate to List[C],
- where C is an object found in globalns or localns (searching
- localns first, of course).
- """
- return self
-
- def _get_type_vars(self, tvars):
- pass
-
  def __repr__(self):
  return f'{self.__module__}.{self.__qualname__}'
 
@@ -119,13 +104,6 @@ def __new__(cls, *args, **kwds):
  raise TypeError(f"Cannot subclass {cls}")
  return super().__new__(cls)
 
- # Things that are not classes also need these.
- def _eval_type(self, globalns, localns):
- return self
-
- def _get_type_vars(self, tvars):
- pass
-
  def __repr__(self):
  cls = type(self)
  return f'{cls.__module__}.{cls.__qualname__}'
@@ -217,12 +195,6 @@ def __getitem__(self, item):
  raise TypeError('{} cannot be further subscripted'
  .format(cls.__name__[1:]))
 
- def _eval_type(self, globalns, localns):
- new_tp = _eval_type(self.__type__, globalns, localns)
- if new_tp == self.__type__:
- return self
- return type(self)(new_tp, _root=True)
-
  def __repr__(self):
  r = super().__repr__()
  if self.__type__ is not None: