Change runtime behavior to support introspection

debonte · Jan 13, 2022 · ccfa9c8 · ccfa9c8
1 parent cb0e210
commit ccfa9c8
Showing 1 changed file with 8 additions and 12 deletions.
diff --git a/pep-9999.rst b/pep-9999.rst
@@ -449,20 +449,16 @@ This example demonstrates::
 Runtime behavior
 ----------------
 
-At runtime, the ``dataclass_transform`` decorator has no effect. It
-simply returns a function that accepts a single argument and returns
-that argument as the return value.
+At runtime, the ``dataclass_transform`` decorator's only effect is to
+set a string attribute named ``__dataclass_transform__`` on the
+decorated function or class to support introspection. The value of the
+attribute should be a serialized dict containing the names and values
+of the ``dataclass_transform`` parameters.
 
-Here is its complete implementation::
+For example::
 
-  def dataclass_transform(
-      *,
-      eq_default: bool = True,
-      order_default: bool = False,
-      kw_only_default: bool = False,
-      field_descriptors: Tuple[Union[type, Callable[..., Any]], ...] = (()),
-  ) -> Callable[[_T], _T]:
-      return lambda a: a
+  '{"eq_default": True, "order_default": False, \
+  "kw_only_default": False, "field_descriptors": ()}'
 
 
 Dataclass semantics