bpo-42128: Structural Pattern Matching (PEP 634) (GH-22917)
Co-authored-by: Guido van Rossum <guido@python.org>
Co-authored-by: Talin <viridia@gmail.com>
Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
diff --git a/Include/object.h b/Include/object.h
index 0870e4c..1454583 100644
--- a/Include/object.h
+++ b/Include/object.h
@@ -359,6 +359,11 @@ given type object has a specified feature.
#define Py_TPFLAGS_HAVE_AM_SEND (1UL << 21)
#endif
+// This undocumented flag gives certain built-ins their unique pattern-matching
+// behavior, which allows a single positional subpattern to match against the
+// subject itself (rather than a mapped attribute on it):
+#define _Py_TPFLAGS_MATCH_SELF (1UL << 22)
+
/* These flags are used to determine if a type is a subclass. */
#define Py_TPFLAGS_LONG_SUBCLASS (1UL << 24)
#define Py_TPFLAGS_LIST_SUBCLASS (1UL << 25)