Hi,
I found a couple of things I didn't know in the CPP manual... first, $
is considerred (for compatibility reasons with... VMS ;-)) a letter,
so you can use it as the first character of a macro. Second, you /can/
have optional parameters in macros, but only with variable arguments.
So armed with that, I redefined the macros for creating
dictionaries/numbers/arrays like that:
#define $I(x) [NSNumber numberWithInt: x]
#define $F(x) [NSNumber numberWithFloat: x]
#define $D(args...) \
[NSDictionary dictionaryWithObjectsAndKeys: args, nil]
#define $A(args...) \
[NSArray arrayWithObjects: args, nil]
#define $MD(args...) \
[NSMutableDictionary dictionaryWithObjectsAndKeys: args, nil]
#define $MA(args...) \
[NSMutableArray arrayWithObjects: args, nil]
So we can easily create a dictionary:
NSDictionary* dict = $D( $I(5), @"toto" );
I think it's a good idea to use $ as we can stick with very short
names yet be very easily spottable. Comments ?
Regarding the optional arguments, that let me define macros like
GETIMP/CALLIMP in a simpler way:
#define GETIMP(object,sel) [object methodForSelector: @selector(sel)]
#define CALLIMP(imp,object,sel, args...) (*imp)(object,
@selector(sel) , ##args)
...that you can use like that:
IMP imp1 = GETIMP(test, plop);
IMP imp2 = GETIMP(test, say:);
CALLIMP(imp1, test, plop);
CALLIMP(imp2, test, say:, @"hello");
--
Nicolas Roard
"La perfection, ce n'est pas quand il n'y a plus rien à ajouter, c'est
quand il n'y a plus rien à retrancher." -- Antoine de St-Exupéry
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