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Make Permission.reverse() keep object identity #47

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Make Permission.reverse() keep object identity #47

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12 changes: 8 additions & 4 deletions flask_principal.py
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Original file line number Diff line number Diff line change
Expand Up @@ -291,10 +291,14 @@ def reverse(self):
Returns reverse of current state (needs->excludes, excludes->needs)
"""

p = Permission()
p.needs.update(self.excludes)
p.excludes.update(self.needs)
return p
tmp, needs, excludes = set(), self.needs, self.excludes
while needs:
tmp.add(needs.pop())
while excludes:
needs.add(excludes.pop())
while tmp:
excludes.add(tmp.pop())
return self

def union(self, other):
"""Create a new permission with the requirements of the union of this
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