Hi Fred,
> You should have a look at GSProtocolGetMethodDescriptionRecursive in
> Additions/GSObjCRuntime.m. I think this should be able to provide the
> required functionality.
Thanks a lot. I do
NSMethodSignature *objcSignature = nil;
#ifdef __APPLE__
{
struct objc_method_description *methodDescription = NULL;
methodDescription = [_protocol
descriptionForInstanceMethod:aSelector];
if (methodDescription == NULL) methodDescription = [_protocol
descriptionForClassMethod:aSelector];
if (methodDescription != NULL) types = methodDescription->types;
}
#else
{
struct objc_method_description desc;
desc = GSProtocolGetMethodDescriptionRecursive(_protocol,
aSelector, YES, YES);
if (desc.name == NULL && desc.types == NULL)
{
desc = GSProtocolGetMethodDescriptionRecursive(_protocol,
aSelector, YES, NO);
}
types = desc.types;
}
#endif
if (types) objcSignature = [NSMethodSignature
signatureWithObjCTypes:types];
now. The Apple part works on Macs and with my ancient GNUstep tree. I do not
know yet, whether the non-Apple part works on Ubuntu (current GNUstep) but will
try once the SIGSEGV problem is figured out. :-)
It's a little surprising to me why
> Protocol * _protocol = @protocol(TestProtocol);
> SEL aSelector = @selector(doIt);
> struct objc_method_description _methodDescription =
> protocol_getMethodDescription(_protocol, aSelector, NO, YES);
> if (_methodDescription.name == NULL) _methodDescription =
> protocol_getMethodDescription(_protocol, aSelector, NO, NO);
> NSLog(@"_methodDescription.name %@",
> NSStringFromSelector(_methodDescription.name));
does not work on Apple as I understood this was the recommended way to do it
now!? But it simply does not work, therefore reverting back back to the
deprecated approach (deprecated descriptionForInstanceMethod: method of
Protocol).
Thanks so much,
Andreas
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