Overview of all known innovations of Swift 2.0

Have you checked the Xcode7 Release Notes? It contains all changes...

Ok, thank you for the information. I thought they are not avaiable for people who are not paying for the developer programm. Here is the link for those who didn't see it before seeing this post: http://adcdownload.apple.com/WWDC_2015/Xcode_7_beta/Xcode_7_beta_Release_Notes.pdf

I have noted the set options. Great improvement.

But I am deceived by the syntax, which is very cumbersome.

For union, one need to write : set1.union(set2) and add a sort().

It would be much better to be able to write : set1 + set2.

My dreamed syntax would be (as in old Pascal):

union : set1 + set 2

intesection : set1 * set2 or set1 & set2

substract : set1 - set2

exclusive or could be : set1 / set2 or set1 | set2

for comparison:

we have equal ==, so

isSubsetOf : set1 <= set2

isStrictSubsetOf : set1 < set2

isSupersetOf : set1 >= set2 ; BTW, we have not isStrictSupersetOf ?

isDisjointWith : more difficult, but we could have a test that intesect is not empty : set1 ?* set2 or isEmpty(set1 * set2) or (set1 * set2)?

You have the option to make your own custom operators.