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If interning an instance of a string subclass, intern a real string object

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with the same value instead.  This ensures that a string (or string
subclass) object's ob_sinterned pointer is always a str (or NULL), and
that the dict of interned strings only has strs as keys.
This commit is contained in:
Tim Peters 2001-09-12 07:54:51 +00:00
parent af90b3e610
commit 111f60964e
2 changed files with 34 additions and 4 deletions
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14
Lib/test/test_descr.py
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@ -1529,6 +1529,20 @@ def inherits():
verify(s.lower().__class__ is str)
verify(s.lower() == base)
s = madstring("x y")
verify(intern(s).__class__ is str)
verify(intern(s) is intern("x y"))
verify(intern(s) == "x y")
i = intern("y x")
s = madstring("y x")
verify(intern(s).__class__ is str)
verify(intern(s) is i)
s = madstring(i)
verify(intern(s).__class__ is str)
verify(intern(s) is i)
class madunicode(unicode):
_rev = None
def rev(self):