1 files changed, 20 insertions, 0 deletions
diff --git a/py/waf/compat.py b/py/waf/compat.py
new file mode 100644
index 0000000000..5c58f9b9bb
--- /dev/null
+++ b/py/waf/compat.py
@@ -0,0 +1,20 @@
+# Compat code for python 2<->3.
+
+
+# Borrowed from the Six package: https://pypi.python.org/pypi/six
+# Copyright (c) 2010-2015 Benjamin Peterson
+def add_metaclass(metaclass):
+	"""Class decorator for creating a class with a metaclass."""
+	def wrapper(cls):
+		orig_vars = cls.__dict__.copy()
+		slots = orig_vars.get('__slots__')
+		if slots is not None:
+			if isinstance(slots, str):
+				slots = [slots]
+			for slots_var in slots:
+				orig_vars.pop(slots_var)
+		orig_vars.pop('__dict__', None)
+		orig_vars.pop('__weakref__', None)
+		return metaclass(cls.__name__, cls.__bases__, orig_vars)
+	return wrapper
+