Open Radar

 
Summary:

Sometimes it is useful to be able to iterate over all cases of an enum. Currently there is no clean way to do this, as per this blog post:

<http://www.swift-studies.com/blog/2014/6/10/enumerating-enums-in-swift>

It would be much cleaner if there was an allCases property which returns a Set of all cases (Set rather than Array, because order is not defined and it should be impossible to have the same enum case more than once).

Steps to Reproduce:

i) Try and iterate over all cases of an enum.
ii) Google the problem
iii) Observe a multitude of dirty hacks

Expected Results:

There should be an elegant way to do this.

Actual Results:

Dirty hacks.

Regression:

N/A

Notes:

Best solutions I’ve come across as yet (which is brittle and prone to breakage when someone adds a new case):

http://www.swift-studies.com/blog/2014/6/10/enumerating-enums-in-swift