Re: [Pyobjc-dev] NSString & mutability

[<bb...@ma...>]

On Tuesday, Feb 4, 2003, at 15:21 US/Eastern, Just van Rossum wrote:
> Someone on comp.sys.mac.programmer.help suggested a trick to find out
> whether an NS[CF]String is mutable or not: by comparing classForCoder 
> to
> NSString. Nifty.
>
> This allowed me to patch objc_support.m so it only converts immutable
> strings to Python strings:

Nice hack, but....

What about all the code that might return a mutable string depending on 
how the developer exercises the API?  Are you willing to assume that 
every getter and setter that internally makes a immutable copy of the 
set string value?  i.e. that...

...
[fooObject setMyNameIs: someRandomMutableString];
return [fooObject myNameIs]
...

... that -myNameIs will return an immutable string?

See this message -- it is still quite relevant.  Mike Ferris is one of 
the guys who helped write the AppKit and Project Builder.

http://www.omnigroup.com/mailman/archive/macosx-dev/2000-May/001886.html