Hello I would like to give a feedback on this SE,

In the proposal, it stats that
In the initial discussion, multiple people were unhappy with the loss of 
compiler warnings for switches over non-exhaustive enums that comes with using 
default—they wanted to be able to handle all cases that exist today, and have 
the compiler tell them when new ones were added. Ultimately I decided not to 
include this in the proposal with the expectation is that switches over 
non-exhaustive enums should be uncommon.

This may not be true for every Swift based app. My scenario is that we are a 
service company who have a open source library for our customer to integrate 
our service into their app. However we also have an official application which 
also uses these libraries too. And since we adopted Swift features as much as 
possible, we do have a lot of public enum types in our libraries and use them 
in our app heavily. This PR will make our code base harder to maintain since we 
lost the complier warning for switches over non-exhaustive enums

I understand that most of the Swift based apps may not suffer from this heavily 
like us but when they do, it’s really a huge pain to maintain this.

Best regards,
Pitiphong P.

> On 20 Dec BE 2560, at 05:58, Ted Kremenek <kreme...@apple.com> wrote:
> The review of "SE 0192 - Non-Exhaustive Enums" begins now and runs through 
> January 3, 2018.
> The proposal is available here:
> https://github.com/apple/swift-evolution/blob/master/proposals/0192-non-exhaustive-enums.md
> <https://github.com/apple/swift-evolution/blob/master/proposals/0192-non-exhaustive-enums.md>
> Reviews are an important part of the Swift evolution process. All review 
> feedback should be sent to the swift-evolution mailing list at:
> https://lists.swift.org/mailman/listinfo/swift-evolution 
> <https://lists.swift.org/mailman/listinfo/swift-evolution>
> or, if you would like to keep your feedback private, directly to the review 
> manager. 
> When replying, please try to keep the proposal link at the top of the message:
> Proposal link: 
> https://github.com/apple/swift-evolution/blob/master/proposals/0192-non-exhaustive-enums.md
> <https://github.com/apple/swift-evolution/blob/master/proposals/0192-non-exhaustive-enums.md>
> ...
> Reply text
> ...
> Other replies
> What goes into a review of a proposal?
> The goal of the review process is to improve the proposal under review 
> through constructive criticism and, eventually, determine the direction of 
> Swift. 
> When reviewing a proposal, here are some questions to consider:
> What is your evaluation of the proposal?
> Is the problem being addressed significant enough to warrant a change to 
> Swift?
> Does this proposal fit well with the feel and direction of Swift?
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> Ted Kremenek
> Review Manager
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