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-rw-r--r--mesonbuild/mesonlib.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/mesonbuild/mesonlib.py b/mesonbuild/mesonlib.py
index d97ebbe..7248be9 100644
--- a/mesonbuild/mesonlib.py
+++ b/mesonbuild/mesonlib.py
@@ -722,3 +722,6 @@ class OrderedSet(collections.MutableSet):
def update(self, iterable):
for item in iterable:
self.__container[item] = None
+
+ def difference(self, set_):
+ return type(self)(e for e in self if e not in set_)