<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Jan 8, 2016, at 8:28 AM, Thorsten Seitz <<a href="mailto:tseitz42@icloud.com" class="">tseitz42@icloud.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html charset=utf-8" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><blockquote type="cite" class=""><div dir="auto" class=""><div class="">Am 08.01.2016 um 12:58 schrieb Rafael Costa <<a href="mailto:rafael@rafaelcosta.me" class="">rafael@rafaelcosta.me</a>>:</div><br class="Apple-interchange-newline"><div class=""><div dir="auto" class=""><div class="">Completely opposed to this change. Optional a are there and already fill this gap. Also, as to "capturing the programmers intent", I completely disagree: As said by someone here: there's no "uninitialised" state. It is always "initialised to nil".</div></div></div></div></blockquote><div class=""><br class=""></div>Sorry, if I didn’t express myself well enough: for optional values that is correct (i.e. values that are allowed to be missing by your business logic). <div class=""><br class=""><div class="">In cases of delayed initialization for mandatory values (which are *not* allowed to be missing by your business logic), though, there definitely *is* an uninitialized state which lasts until the delayed initialization did happen. </div><div class="">When modelling this with an IUO this uninitialized state is expressed by nil which will raise an exception if accessed and rightfully so, because your business logic does not expect this.</div><div class=""><br class=""></div><div class="">The problems with IUO are </div><div class="">(1) they can be reset to nil which does not make sense IMO and </div></div></div></div></blockquote><div><br class=""></div><div>I think resetting a variable to uninitialized via “none” would be useful. Consider restarting a game without creating a new game model object for example. Uninitializing variables would ensure they get initialized again.</div><br class=""><blockquote type="cite" class=""><div class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class=""><div class="">(2) they confuse nil == missing optional value with nil == uninitialized mandatory value. These are two completely different meanings and it is unfortunate that they are both expressed by nil, similar to the problem of null in Java (with the big improvement in Swift that the types and the behaviors differ :-).</div><div class=""><br class=""></div><div class="">For the record: As we currently do not (yet) have a clean way of expressing delayed initialization, I don’t think we should introduce „none“ now. </div><div class="">Getting rid of the problems with IUOs should be part of a proposal defining delayed initialization (and it has to be seen whether „none“ would be part of that or if there aren’t other solutions).</div><div class=""><br class=""></div><div class="">-Thorsten<br class=""><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><div class=""><blockquote type="cite" class=""><div class=""><br class=""></div><div class=""><div dir="auto" class=""><div class="">Rafael Costa<br class="">Envoyé de mon iPhone</div><div class=""><br class="">Le 8 janv. 2016 à 07:50, Thorsten Seitz via swift-evolution <<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>> a écrit :<br class=""><br class=""></div><blockquote type="cite" class=""><div class=""><meta http-equiv="Content-Type" content="text/html charset=utf-8" class=""><meta http-equiv="Content-Type" content="text/html charset=utf-8" class="">type T always means a value of T<div class="">type T? always means an *optional* value of T, i.e. it is part of the business logic that the value can be missing (i.e. is nil)</div><div class="">type T! always means delayed initialization, i.e. the value is not optional and business logic never assumes nil</div><div class=""><br class=""></div><div class="">This is an important distinction! Languages like Java typically use(d) null for both latter cases, mixing them up. </div><div class="">Using IUOs for the latter case is more clear but still unfortunate as the value nil is still mixing both cases up and leading to confusion.</div><div class=""><br class=""></div><div class="">I think that confusion is what Amir wants to clean up.</div><div class="">The point of his proposal is to make clear that a value of nil is always ok for business logic because the new value of none takes the other role.</div><div class=""><br class=""></div><div class="">We could keep the type notation T! as is but it would no longer be an IUO allowing assignment of nil but would start out with a value of none (or should be explicitly initialized with that). I’d expect that assignment of none would not be allowed, i.e. falling back to the uninitialized state would be prohibited (another distinction from IOUs).</div><div class="">This might be part of a proposal targeting delayed initialization.</div><div class=""><br class=""></div><div class="">-Thorsten</div><div class=""><br class=""><div class=""><blockquote type="cite" class=""><div class="">Am 08.01.2016 um 01:19 schrieb Amir Michail via swift-evolution <<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>>:</div><br class="Apple-interchange-newline"><div class=""><div style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><blockquote type="cite" class=""><div class=""><br class="Apple-interchange-newline">On Jan 7, 2016, at 7:09 PM, Jack Lawrence <<a href="mailto:jackl@apple.com" class="">jackl@apple.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><blockquote type="cite" class=""><div class=""><div class="">Currently, “nil” can mean either “uninitialized” or “initialized to nil”, which can be confusing. What I propose is cleaner and eliminates the need for implicitly unwrapped optionals.</div></div></blockquote><div class=""><br class=""></div><div class="">`nil` always means “initialized to nil”. It never means “uninitialized”.</div></div></div></blockquote><div class=""><br class=""></div><div class="">The point is that “nil" doesn’t capture the programmer’s intent precisely. The intent could be to delay initialization (e.g., until viewDidLoad) or it could be to use nil as a special value (e.g., to indicate the end of a linked list).</div><br class=""><blockquote type="cite" class=""><div class=""><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><br class=""><blockquote type="cite" class=""><div class=""><div class="">As I mentioned elsewhere, you could still use “!” in the type to indicate a variable that may be uninitialized but is not necessarily an optional, thus separating the concepts of uninitialized from “initialized to nil”.</div></div></blockquote><div class=""><br class=""></div>I’d be interested to see a real world code example where this language change is useful and as safe or safer than Optional/IUO.<div class=""><br class=""></div><div class="">Jack<br class=""><br class=""><div class=""><blockquote type="cite" class=""><div class="">On Jan 7, 2016, at 4:03 PM, Amir Michail via swift-evolution <<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><blockquote type="cite" class=""><div class=""><br class="Apple-interchange-newline">On Jan 7, 2016, at 6:58 PM, Jarod Long <<a href="mailto:swift@lng.la" class="">swift@lng.la</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class=""><div name="messageBodySection" class="">The problem as I see it is that the functionality of none is already covered by optionals in a safer way. If something might be uninitialized, it really should be made explicit to the programmer so that they know to handle it properly. Implicitly-unwrapped optionals are already pretty generous in terms of allowing the programmer to ignore the possibility of a nil value, so it seems unnecessary to create a new feature to make it even easier.<br class=""><br class=""></div></div></div></blockquote><div class=""><br class=""></div><div class="">Currently, “nil” can mean either “uninitialized” or “initialized to nil”, which can be confusing. What I propose is cleaner and eliminates the need for implicitly unwrapped optionals.</div><div class=""><br class=""></div><div class="">As I mentioned elsewhere, you could still use “!” in the type to indicate a variable that may be uninitialized but is not necessarily an optional, thus separating the concepts of uninitialized from “initialized to nil”.</div><br class=""><blockquote type="cite" class=""><div class=""><div class=""><div name="messageBodySection" class="">Jarod</div><div name="messageSignatureSection" class=""><br class=""></div><div name="messageReplySection" class=""><br class="">On Jan 7, 2016, 15:44 -0800, Amir Michail <<a href="mailto:a.michail@me.com" class="">a.michail@me.com</a>>, wrote:<br class=""><blockquote type="cite" class=""><br class=""><div class=""><blockquote type="cite" class=""><div class="">On Jan 7, 2016, at 3:15 PM, Jarod Long <<a href="mailto:jrd@lng.la" class="">jrd@lng.la</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="">None is really just another way of saying something is nil, and a type suffix to allow assigning none is exactly equivalent to implicitly-unwrapped optionals, so I don't see any value in replacing them with this feature.</div></div></div></blockquote><div class=""><br class=""></div><div class="">“None" means a variable is uninitialized. “Nil" need not mean that.</div><div class=""><br class=""></div><div class="">Reading an uninitialized variable is an error. Reading a nil variable need not be.</div><div class=""><br class=""></div><div class="">With “none", you can have uninitialized variables without resorting to optionals or implicitly unwrapped optionals.</div><br class=""><blockquote type="cite" class=""><div class=""><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class=""><br class=""></div><div class="">Not requiring a type suffix to assign none would be equivalent to allowing assignment of nil to any type, making everything an implicitly-unwrapped optional. You lose the compile-time nil safety that optionals provide, and the compiler likely loses many optimization opportunities because there are many situations where it can't know (or it is very difficult to know) whether a value could have possibly been assigned none at some point.</div><div class=""><br class=""></div><div class="">I understand the desire to reduce optionality to make code cleaner, but this kind of feature actually hides complexity and makes things more difficult in the long run. Implicitly-unwrapped optionals are a good compromise between cleanliness and effectively communicating when something can fail at run time.</div><div class=""><br class=""></div><div class="">Jarod</div><br class=""><div class=""><blockquote type="cite" class=""><div class="">On Jan 7, 2016, at 11:41, Amir Michail via swift-evolution <<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><br class=""><br class="">Sent from my iPad</div><div class="" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><br class="">On Jan 7, 2016, at 2:34 PM, Félix Cloutier <<a href="mailto:felixcca@yahoo.ca" class="">felixcca@yahoo.ca</a>> wrote:<br class=""><br class=""></div><blockquote type="cite" class="" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div class="">Yes, but following your suggestion, there may not be a difference between a non-optional value and an implicitly-wrapped optional, meaning that there will be a lot more of them.<br class=""></div></blockquote><div class="" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><br class=""></div><div class="" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">Variables that are never assigned "none" need not have these runtime checks. Alternatively, you can have a type suffix similar to ? to indicate that a variable may be in an uninitialized state. </div><br class="" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><blockquote type="cite" class="" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div class=""><div class=""><br class="Apple-interchange-newline"><span class="" style="font-family: 'Lucida Grande'; font-size: 12px; font-style: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;">Félix</span></div><br class=""><div class=""><blockquote type="cite" class=""><div class="">Le 7 janv. 2016 à 14:10:44, Amir Michail <<a href="mailto:a.michail@me.com" class="">a.michail@me.com</a>> a écrit :</div><br class="Apple-interchange-newline"><div class=""><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><br class=""><div class=""><blockquote type="cite" class=""><div class="">On Jan 7, 2016, at 2:09 PM, Félix Cloutier <<a href="mailto:felixcca@yahoo.ca" class="">felixcca@yahoo.ca</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">That would leave you with runtime checks instead of compile-time checks and I totally disagree with that.<br class=""><div class=""><br class="Apple-interchange-newline"></div></div></div></blockquote><div class=""><br class=""></div><div class="">Implicitly unwrapped optionals do runtime checks also.</div><br class=""><blockquote type="cite" class=""><div class=""><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class=""><span class="" style="font-family: 'Lucida Grande'; font-size: 12px; font-style: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;">Félix</span></div><br class=""><div class=""><blockquote type="cite" class=""><div class="">Le 7 janv. 2016 à 13:45:21, Amir Michail <<a href="mailto:a.michail@me.com" class="">a.michail@me.com</a>> a écrit :</div><br class="Apple-interchange-newline"><div class=""><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><br class=""><div class=""><blockquote type="cite" class=""><div class="">On Jan 7, 2016, at 1:40 PM, Félix Cloutier <<a href="mailto:felixcca@yahoo.ca" class="">felixcca@yahoo.ca</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">An implicitly-unwrapped optional would do almost that, no?<br class=""><div class=""><br class="Apple-interchange-newline"></div></div></div></blockquote><div class=""><br class=""></div><div class="">You can use “none” to eliminate implicitly unwrapped optionals from the language.</div><br class=""><blockquote type="cite" class=""><div class=""><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class=""><span class="" style="font-family: 'Lucida Grande'; font-size: 12px; font-style: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;">Félix</span></div><br class=""><div class=""><blockquote type="cite" class=""><div class="">Le 7 janv. 2016 à 12:46:53, Amir Michail via swift-evolution <<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>> a écrit :</div><br class="Apple-interchange-newline"><div class=""><div class="">Examples:<br class=""><br class="">var x:Int = none // uninitialized but not an optional<br class=""><br class="">print(x) // run-time error as x is uninitialized<br class=""><br class="">if x == nil { … } // compile time error… x can never be nil because it is not an optional<br class=""><br class="">if x == none { x = 2 } // … but it can be uninitialized<br class=""><br class="">Optionals can also be uninitialized:<br class=""><br class="">var y:Int? = none // uninitialized and an optional<br class=""><br class="">if y == nil { … } // run-time error as y is uninitialized<br class=""><br class="">y = nil<br class=""><br class="">if y == nil { … } // fine<br class=""><br class="">_______________________________________________<br class="">swift-evolution mailing list<br class=""><a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a><br class=""><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a><br class=""></div></div></blockquote></div><br class=""></div></div></blockquote></div><br class=""></div></div></blockquote></div><br class=""></div></div></blockquote></div><br class=""></div></div></blockquote></div><br class=""></div></blockquote><img src="https://u2002410.ct.sendgrid.net/wf/open?upn=8K1sNvSH2KR-2BkHEodrUTpf34ATsvtwNhFabfhxmB11RfPZORvm3qiYpH119HK-2BtUiKmVo0e7KNU0BkWmEMqCovcmHjrvs0Qr0Rsz4EPHpW-2FDqGL1fhfF6z4nwardSGPcsABLTL5X4OVmZi5HatJF0uAUBItCH2t-2F95hCWoWgpns8ziSfO009LCDjv-2FCTKoc1c-2FtEX-2B1x8aysOV-2BCVkUDig-3D-3D" alt="" width="1" height="1" border="0" class="" style="font-family: Helvetica; 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font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">swift-evolution@swift.org</a><br class="" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">https://lists.swift.org/mailman/listinfo/swift-evolution</a></div></blockquote></div><br class=""></div></div></div></blockquote></div><br class="" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><img src="https://u2002410.ct.sendgrid.net/wf/open?upn=1MXK54sosN3xru3iYcLt0oBZ2w20i49gyogXctgrspeCIPXn-2FKEnN8AmKybPgnf8lrCnFRNehqyRxVWrwbBXHvq9WfDO1va0gGLAtH07QHY1Wf96pd0wAFSKIh9xFjmxXqeVsiB3Z-2FTS3Y8JxnMrtWX50oaq2TV5NCMBi8QXjKRpyTK3MqZLCxg2Bzc6h4hR7NvRSc4WhPajAXhbxVp6RXu6K6sgf02BEAY1WWPvCCU-3D" alt="" width="1" height="1" border="0" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; height: 1px !important; width: 1px !important; border-width: 0px !important; margin: 0px !important; padding: 0px !important;" class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class=""><span class="Apple-converted-space"> </span></span><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">_______________________________________________</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">swift-evolution mailing list</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><a href="mailto:swift-evolution@swift.org" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">swift-evolution@swift.org</a><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a></div></blockquote></div><br class=""></div>
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</div></blockquote><blockquote type="cite" class=""><div class=""><span class="">_______________________________________________</span><br class=""><span class="">swift-evolution mailing list</span><br class=""><span class=""><a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a></span><br class=""><span class=""><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a></span><br class=""></div></blockquote></div></div></blockquote></div><br class=""></div></div></div></div></div></blockquote></div><br class=""></body></html>