Define _infer instead of infer on subclasses of NodeNG

Author: DanielNoord

astroid/nodes/node_classes.py

@@ -16,6 +16,7 @@
     Callable,
     ClassVar,
     Generator,
+    Iterator,
     Optional,
     Type,
     TypeVar,
@@ -4876,7 +4877,9 @@ def __init__(
             parent=self.original.parent,
         )
 
-    def infer(self, context=None, **kwargs):
+    def _infer(
+        self, context: Optional[InferenceContext] = None
+    ) -> Iterator[Union[NodeNG, Type[util.Uninferable]]]:
         yield self.value
 
 

astroid/objects.py

@@ -12,8 +12,10 @@
 """
 
 import sys
+from typing import Iterator, Optional, TypeVar
 
 from astroid import bases, decorators, util
+from astroid.context import InferenceContext
 from astroid.exceptions import (
     AttributeInferenceError,
     InferenceError,
@@ -30,6 +32,8 @@
 else:
     from astroid.decorators import cachedproperty as cached_property
 
+_T = TypeVar("_T")
+
 
 class FrozenSet(node_classes.BaseContainer):
     """class representing a FrozenSet composite node"""
@@ -324,5 +328,5 @@ def pytype(self):
     def infer_call_result(self, caller=None, context=None):
         raise InferenceError("Properties are not callable")
 
-    def infer(self, context=None, **kwargs):
-        return iter((self,))
+    def _infer(self: _T, context: Optional[InferenceContext] = None) -> Iterator[_T]:
+        yield self