From e01bdf2432511b8bf51ecfd4fb46f140dbedae04 Mon Sep 17 00:00:00 2001
From: "Paul \"LeoNerd\" Evans" <paul@matrix.org>
Date: Wed, 20 Aug 2014 15:25:17 +0100
Subject: [PATCH] Define __copy__ and __deepcopy__ as identity functions on
DomainSpecificString, so that copy.deepcopy() will work on them
---
synapse/types.py | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/synapse/types.py b/synapse/types.py
index b8e191bb3c..fd6a3d1d72 100644
--- a/synapse/types.py
+++ b/synapse/types.py
@@ -38,6 +38,14 @@ class DomainSpecificString(
def __iter__(self):
raise ValueError("Attempted to iterate a %s" % (type(self).__name__))
+ # Because this class is a namedtuple of strings and booleans, it is deeply
+ # immutable.
+ def __copy__(self):
+ return self
+
+ def __deepcopy__(self, memo):
+ return self
+
@classmethod
def from_string(cls, s, hs):
"""Parse the string given by 's' into a structure object."""
--
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