[Pyobjc-dev] Unicode-like objects

[Just v. R. <ju...@le...>]

In response to my query on c.l.py, Michael Hudson came up with this
example:

>>> re.match('(a)|b', array.array('u', u'a string')).groups()
(array('u', u'a'),)

So apparently there is some sort of unicode buffer interface. Yet I
believe this can only work if the internal layout of the bytes match
that of a real unicode object. Could that be made the case for NSString?

Additional potential problem: for string-like objects to work
interchangably with real strings, they must hash equally when they
compare equally. The Python unicode implementation apparently had to go
through quite a bit of trouble to make this true between (7-bit) 'str'
instances and 'unicode' instances.

Just