NSString methods returns GSUnicodeString, why?

[Laurent Julliard]

All,

I'm in the process of writing a Ruby to GNUstep binding. And I have
difficutlies to understand the following problem. A simple piece of Ruby
code illustrates the problem (irb is the Ruby interactive shell):

irb> a = NSString.new    # create a new NSString object
irb> a.initWithCString("GNUstep forever")
irb> a.length
15

Everything seems to be working fine. But...

irb> a.cString
Uncaught exception NSCharacterConversionException, reason: Can't get
cString from Unicode string.

Right after the initWithCString method call I have put some logs showing
that initWithCString actually returns a GSUnicodeString object instead
of a NSString object as you would expect. It looks like GSUnicodeString
is a subclass of GSString which in turn is a subclass of NSString. So
why isn't the cString method call working?

Any idea is welcome.

Thanks

PS: Right now the approach we have taken on the Ruby-GNUstep binding is
entirely dynamic. We don't use any declarative approach a la SWIG an i
would like to keep it this way.

-- 
Laurent JULLIARD - XR&T Technology and Alliances Office -  Open Source
team
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