Re: Re[2]: NSString / NSMutableString protocol

[Richard Frith-Macdonald]

On Monday, March 25, 2002, at 01:51 PM, ml@orange-concept.com wrote:

> On Mon, 25 Mar 2002 13:30:40 +0000 Richard Frith-Macdonald 
> <richard@brainstorm.co.uk> wrote:
>
> > |
> > | On Monday, March 25, 2002, at 01:11 PM, Manuel Guesdon ,
> > | MISSING_MAILBOX_TERMINATOR@.SYNTAX-ERROR wrote:
> > |
> > | > Hi,
> > | >
> > | > When compiling GNUstepWeb which CVS current version, I get:
> > | >         derived_src/GSWeb/GSWDynamicURLString.h:32: Cannot find
> > | > protocol declaration for `NSMutableString'
> > | >         GSWUtils.m:55: Cannot find protocol declaration for 
> > `NSString'
> > | >
> > | > It seems that NSString && NSMutableString protocol have 
> > disappeared.
> > | >
> > | > How can I replace the use of them ?
> > |
> > | Just write whatever protocols you want.
> > |
> > | If you are wanting to test to see if an object is a string ... use
> > | isKindOfClass:
>
> That's what I've done to work but isKindOfClass: won't work for non 
> NSString objects which where implementing NSString
> protocol. The only solution I see is to use respondsToSelector: for 
> methods I'd like to call. Do you see another one ?

If you are only using one or two methods, the respondsToSelector: 
solution is good.
If you really have non-string objects which conform to the old NSString 
protocol, and want to use lots of NSString methods,
you should write a protocol containing the methods you want to use and 
have the objects conform to it.