Re: How to check that selectors exist

[Adam Fedor <fedor at doc dot com>]

Nicola Pero wrote:
>  4. it's completely inconsistent with how checks for functions and
> variables and methods and everything are handled/done, since normally when
> checking the compiler never 'looks ahead', while for selectors it would
> do; this might look like an improvement at a first glance, but it actually
> confused me a lot the first time I tried to use it, since the golden
> standard rule that 'everything must be declared before being used' is no
> longer valid, but a more complex, selector-specific, rule is used.
This is the main point for me, since I think selectors should be handled 
like functions in this respect, and it's just good practice (sometimes 
necessary!) to declare a function before you use it.

double foo(double a);

int bar()
{
  double b = foo(4.5);
}

thus:

@interface MyObject (PrivateMethods)
- (double) foo: (double)a
@end
@implementation MyObject
- (int) bar
{
  double b = [self foo: 4.5];
}
@end


--
Adam Fedor, Digital Optics Corp.      | I'm glad I hate spinach, because
http://www.doc.com                    | if I didn't, I'd eat it, and you
                                      | know how I hate the stuff.