[inference] introduce (but not use it yet) explicit inference for some node instances

1 files changed, 5 insertions, 0 deletions

diff --git a/exceptions.py b/exceptions.py
index 07fb945e..3889e2e7 100644
--- a/exceptions.py
+++ b/exceptions.py
@@ -36,6 +36,11 @@ class NotFoundError(ResolveError):
 class InferenceError(ResolveError):
     """raised when we are unable to infer a node"""
 
+class UseInferenceDefault(Exception):
+    """exception to be raised in custom inference function to indicate that it
+    should go back to the default behaviour
+    """
+
 class UnresolvableName(InferenceError):
     """raised when we are unable to resolve a name"""