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Deny __iter__ on UserID/RoomID/RoomName instances as it's a subtle bug that will bite you

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Paul "LeoNerd" Evans 2014-08-18 16:07:14 +01:00
parent bb793019a5
commit 6fafa878f6
1 changed files with 6 additions and 0 deletions
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6
synapse/types.py
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@ -32,6 +32,12 @@ class DomainSpecificString(
HomeServer as being its own HomeServer as being its own
""" """
# Deny iteration because it will bite you if you try to create a singleton
# set by:
# users = set(user)
def __iter__(self):
raise ValueError("Attempted to iterate a %s" % (type(self).__name__))
@classmethod @classmethod
def from_string(cls, s, hs): def from_string(cls, s, hs):
"""Parse the string given by 's' into a structure object.""" """Parse the string given by 's' into a structure object."""