py: Improve __bool__ and __len__ dispatch; add slots for them.

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/basics/slots_bool_len.py b/tests/basics/slots_bool_len.py
new file mode 100644
index 0000000000..481fe9b4e6
--- /dev/null
+++ b/tests/basics/slots_bool_len.py
@@ -0,0 +1,17 @@
+class A:
+    def __bool__(self):
+        print('__bool__')
+        return True
+    def __len__(self):
+        print('__len__')
+        return 1
+
+class B:
+    def __len__(self):
+        print('__len__')
+        return 0
+
+print(bool(A()))
+print(len(A()))
+print(bool(B()))
+print(len(B()))