Re: Re[6]: Recent key-value encoding changes to NSObject.

[Richard Frith-Macdonald]

On Monday, February 11, 2002, at 06:17 PM, Manuel Guesdon wrote:

> > | Option 2 ... as I described before, modify a few standard methods
> > | somewhat like this -
> > |
> > | - (BOOL) respondsToSelector: (SEL)aSel
> > | {
> > |    BOOL result = [super respondsToSelector: aSel];
> > |
> > |    if (result == NO && this_is_a_private_get_method(aSel))
> > |      return YES;
> > |
> > |    return result;
> > | }
> > |
> > | - (NSMethodSignature*) methodSignatureForSelector: (SEL)aSel
> > | {
> > |    NSMethodSignature        *sig = [super 
> > methodSignatureForSelector: aSel];
> > |
> > |    if (sig == nil && this_is_a_private_get_method(aSel))
> > |      return signature_of_method;
> > |
> > |    return imp;
> > | }
> > |
> > | - (IMP) methodForSelector: (SEL)aSel
> > | {
> > |    IMP        imp = [super methodForSelector: aSel];
> > |
> > |    if (imp == forwarding_method && 
> > this_is_a_private_get_method(aSel))
> > |      return get_method;
> > |    return imp;
> > | }
> > |
> > | - (id) theGetMethod
> > | {
> > |    // examine _cmd and fetch the appropriate value from the 
> > dictionary.
> > | }
>
> I'n not sure I follow your demonstration :-)
> The  "theGetMethod" is my "x -(id)a" method  ?
> If yes, this is not good since  "user" can't just put "|self 
> storedValueForKey:@"..."] in it.

No. it would do something like this (actually, for performance you would 
probably use the objc runtime
method sel_get_name() (I think) to get a cString and manipulate that ... 
only converting to an NSString
to use as the dictionary key).

- (id) theGetMethod
{
  NSString      *key = NSStringFromSelector(_cmd);

  if ([key hasPrefix: @"_"] == YES)
    key = [key substringFromIndex: 1];
  return [_values objectForKey: key];
}