Follow-up Comment #1, bug #43915 (project gnustep):
My solution for NSSet isEqualToSet: method. It looks ugly with introspection,
because countForObject: methods is private for NSSet (or NSMutableSet) and is
public for NSCountedSet in Apple implementation. It is possible to compare
NSCountedSet and NSSet, the second one has count number equal 1 for all
members. I have not tested it very carefully.
- (BOOL)isEqualToSet:(id)other
{
if ([self count] != [other count]) {
return NO;
} else {
id object, enumerator = [self objectEnumerator];
BOOL isOtherCountedSet = [other isKindOfClass:[NSCountedSet class]];
BOOL isSelfCountedSet = [self isKindOfClass:[NSCountedSet class]];
while ((object = [enumerator nextObject])) {
if (![other member: object]) {
return NO;
}
NSUInteger countForObjectInOther = isOtherCountedSet ? [other
countForObject:object] : 1;
NSUInteger countForObjectInSelf = isSelfCountedSet ? [self
countForObject:object] : 1;
if (countForObjectInOther != countForObjectInSelf) {
return NO;
}
}
}
return YES;
}
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