<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 Jul 22, 2016, at 9:04 PM, Dave Abrahams 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=""><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: 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-caps: 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="">on Fri Jul 22 2016, Matthew Johnson <</span><a href="mailto:swift-evolution@swift.org" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: 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><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: 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="">> wrote:</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: 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=""><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: 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" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: 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="">On Jul 22, 2016, at 8:37 PM, Xiaodi Wu via swift-evolution<br class=""><<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>> wrote:<br class=""><br class="">On Fri, Jul 22, 2016 at 8:20 PM, Dave Abrahams via swift-evolution<br class=""><<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a><br class=""></blockquote><br class=""><blockquote type="cite" class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a>>><br class="">wrote:<br class=""><br class="">on Fri Jul 22 2016, Daniel Duan <<a href="http://daniel-at-duan.org/" class="">daniel-AT-duan.org</a>> wrote:<br class=""><br class=""><blockquote type="cite" class=""><blockquote type="cite" class="">On Jul 22, 2016, at 3:00 PM, Dave Abrahams via swift-evolution<br class=""><<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a>>><br class="">wrote:<br class=""><br class=""><br class="">on Fri Jul 22 2016, Daniel Duan<br class=""><<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a>><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a>>>><br class="">wrote:<br class=""><br class=""></blockquote><br class=""><blockquote type="cite" class=""><blockquote type="cite" class=""><blockquote type="cite" class="">On Jul 22, 2016, at 11:05 AM, Dave Abrahams via swift-evolution<br class=""><<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a>><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a>>>><br class="">wrote:<br class=""><br class=""><br class="">on Thu Jul 21 2016, Duan<br class=""></blockquote><br class=""><blockquote type="cite" class=""><<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a>><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a>>><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a>><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a>>>>><br class="">wrote:<br class=""><br class=""><blockquote type="cite" class="">Great proposal. I want to second that areSame may mislead user to<br class="">think this is about identity.<br class=""><br class="">I like areEquivalent() but there may be better names.<br class=""></blockquote><br class="">It really *is* about identity as I posted in a previous message. But<br class="">that doesn't change the fact that areEquivalent might be a better name.<br class="">It's one of the things we considered; it just seemed long for no real<br class="">benefit.<br class=""><br class=""></blockquote><br class="">If the addresses of the arguments aren’t being used, then we don’t consider<br class="">them part of their *identity*. I can follow this logic. My fear is most users<br class="">won’t make this leap on their own and get the same initial impression as I did.<br class="">It's entirely possible this fear is unfounded. Some educated bikesheding<br class="">wouldn't hurt here IMO :)<br class=""></blockquote><br class="">Well, it's still a very real question whether we ought to have the<br class="">additional API surface implied by areSame, or wether we should collapse<br class="">it with ===.<br class=""><br class=""></blockquote><br class="">To spell this out (because I had to think about it for a second): === will be derived from<br class=""><=>,<br class="">but also becomes default implementation for ==, which remains open for<br class="">customization.<br class=""></blockquote><br class="">I was imagining roughly this (untested):<br class=""><br class=""> /// Two references are identical if they refer to the same<br class=""> /// instance.<br class=""> ///<br class=""> /// - Note: Classes with a more-refined notion of “identical”<br class=""> /// should conform to `Identifiable` and implement `===`.<br class=""> func ===(lhs: AnyObject, rhs: AnyObject) -> Bool {<br class=""> ObjectIdentifier(lhs) == ObjectIdentifier(rhs)<br class=""> }<br class=""><br class=""> /// Supports testing that two values of `Self` are identical<br class=""> ///<br class=""> /// If `a` and `b` are of type `Self`, `a === b` means that<br class=""> /// `a` and `b` are interchangeable in most code. A conforming<br class=""> /// type can document that specific observable characteristics<br class=""> /// (such as the `capacity` of an `Array`) are inessential and<br class=""> /// thus not to be considered as part of the interchangeability<br class=""> /// guarantee.<br class=""> ///<br class=""> /// - Requires: `===` induces an equivalence relation over<br class=""> /// instances.<br class=""> /// - Note: conforming types will gain an `==` operator that<br class=""> /// forwards to `===`.<br class=""> /// - Note: Types that require domain-specific `==`<br class=""> /// implementations with different semantics (e.g. floating<br class=""> /// point) should define a more-specific overload of `==`,<br class=""> /// which will be used in contexts where the static type is<br class=""> /// known to the compiler.<br class=""> /// - Note: Generic code should usually use `==` to compare<br class=""> /// conforming instances; that will always dispatch to `===`<br class=""> /// and will be unaffected by more specific overloads of<br class=""> /// `==`.<br class=""> protocol Identifiable { // née Equatable name is negotiable<br class=""> func ===(_: Self, _: aSelf) -> Bool<br class=""> }<br class=""><br class=""> /// Default definition of `==` for Identifiable types.<br class=""> func ==<T: Identifiable>(lhs: T, rhs: T) -> Bool {<br class=""> return lhs === rhs<br class=""> }<br class=""><br class=""> /// Conforming types have a default total ordering.<br class=""> ///<br class=""> /// If `a` and `b` are of type `Self`, `a <=> b` means that<br class=""> /// `a` and `b` are interchangeable in most code. A conforming<br class=""> /// type can document that specific observable characteristics<br class=""> /// (such as the `capacity` of an `Array`) are inessential and<br class=""> /// thus not to be considered as part of the interchangeability<br class=""> /// guarantee.<br class=""> ///<br class=""> /// - Requires: `<=>` induces a total ordering over<br class=""> /// instances.<br class=""> /// - Requires: the semantics of `<=>` are consistent with<br class=""> /// those of `===`. That is, `(a <=> b) == .equivalent`<br class=""> /// iff `a === b`.<br class=""><br class="">For floating point, I'd hope that `a === b` if `(a <=> b) == .same` *but not iff*. This is to satisfy IEEE 754: "Comparisons shall ignore the sign of zero (so +0 = −0)”.<br class=""></blockquote><br class="">The point of this design is that `===` means identity and that `.same ` also means identity.<br class=""><br class="">Since this is new territory I suppose we get to decide what identity<br class="">means for floating point. Should +0 and -0 have the same identity or<br class="">not? I’ll leave the answer to folks more knowledgable about numerics<br class="">than I.<br class=""></blockquote><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: 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-caps: 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="">It's settled law<span class="Apple-converted-space"> </span></span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: 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://en.wikipedia.org/wiki/IEEE_floating_point#Total-ordering_predicate" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: 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://en.wikipedia.org/wiki/IEEE_floating_point#Total-ordering_predicate</a><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: 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-caps: 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-caps: 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=""></div></blockquote><div><br class=""></div><div>Yes, assuming we want to define identity in terms of the IEEE definition of total ordering.</div><br class=""><blockquote type="cite" class=""><div class=""><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: 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" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: 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=""><br class=""><br class=""><blockquote type="cite" class=""><br class=""> /// - Note: conforming types will gain `<`, `<=`, `>`, and `>=`<br class=""> /// operators defined in terms of `<=>`.<br class=""> /// - Note: Types that require domain-specific `<`, etc.<br class=""> /// implementations with different semantics (e.g. floating<br class=""> /// point) should define more-specific overloads of those<br class=""> /// operators, which will be used in contexts where the<br class=""> /// static type is known to the compiler.<br class=""> /// - Note: Generic code can freely use `<=>` or the traditional<br class=""> /// comparison operators to compare conforming instances;<br class=""> /// the result will always be supplied by `<=>`<br class=""> /// and will be unaffected by more specific overloads of<br class=""> /// the other operators.<br class=""> protocol Comparable : Identifiable {<br class=""> func <=> (lhs: Self, rhs: Self) -> Ordering<br class=""> }<br class=""><br class=""> /// Default implementations of `<`, `<=`, `>`, and `>=`.<br class=""> extension Comparable {<br class=""> static func <(lhs: Self, rhs: Self) -> Bool {<br class=""> return (lhs <=> rhs) == .ascending<br class=""> }<br class=""> static func <=(lhs: Self, rhs: Self) -> Bool {<br class=""> return (rhs <=> lhs) != .ascending<br class=""> }<br class=""> static func >(lhs: Self, rhs: Self) -> Bool {<br class=""> return (lhs <=> rhs) == .descending<br class=""> }<br class=""> static func >=(lhs: Self, rhs: Self) -> Bool {<br class=""> return (rhs <=> lhs) != .descending<br class=""> }<br class=""> }<br class=""><br class=""><blockquote type="cite" class="">I like this idea. If we keep === as a separate thing, now users have 3 “opportunities” to define<br class="">equality. The must be few, if any, use cases for this.<br class=""><br class="">Would love to see if anyone on the list can give us an example. Otherwise we should make<br class="">areSame === again™!<br class=""><br class=""><blockquote type="cite" class=""><blockquote type="cite" class=""><br class=""><blockquote type="cite" class=""><blockquote type="cite" class="">Daniel Duan<br class="">Sent from my iPhone<br class=""><br class=""><blockquote type="cite" class="">On Jul 21, 2016, at 6:32 PM, Robert Widmann via swift-evolution<br class=""><<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a>>><br class="">wrote:<br class=""><br class=""><br class=""><blockquote type="cite" class="">On Jul 21, 2016, at 6:19 PM, Xiaodi Wu<br class=""><<a href="mailto:xiaodi.wu@gmail.com" class="">xiaodi.wu@gmail.com</a><br class=""><<a href="mailto:xiaodi.wu@gmail.com" class="">mailto:xiaodi.wu@gmail.com</a>>><br class="">wrote:<br class=""><br class="">This is nice. Is `areSame()` being proposed because static `==` is<br class="">the status quo and you're trying to make the point that `==` in the<br class="">future need not guarantee the same semantics?<br class=""></blockquote><br class="">Yep! Equivalence and equality are strictly very different things.<br class=""><br class=""><blockquote type="cite" class=""><br class="">Nit: I think the more common term in stdlib would be<br class="">`areEquivalent()`. Do you think `same` in that context (independent<br class="">of the word "ordering") might erroneously suggest identity?<br class=""></blockquote><br class="">There is room for improvement here. Keep ‘em coming.<br class=""><br class=""><blockquote type="cite" class=""><br class=""><br class=""><blockquote type="cite" class="">On Thu, Jul 21, 2016 at 8:11 PM, Robert Widmann via<br class="">swift-evolution<br class=""><<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a>>><br class="">wrote:<br class="">Hello Swift Community,<br class=""><br class="">Harlan Haskins, Jaden Geller, and I have been working on a<br class="">proposal to clean up the semantics of ordering relations in the<br class="">standard library. We have a draft that you can get as a gist.<br class="">Any feedback you might have about this proposal helps - though<br class="">please keeps your comments on Swift-Evolution and not on the gist.<br class=""><br class="">Cheers,<br class=""><br class="">~Robert Widmann<br class=""><br class=""><br class=""><br class=""><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="mailto:swift-evolution@swift.org" class="">mailto: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=""><<a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a>><br class=""><br class=""></blockquote><br class=""></blockquote><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="mailto:swift-evolution@swift.org" class="">mailto: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=""><<a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a>><br class=""></blockquote>_______________________________________________<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="mailto:swift-evolution@swift.org" class="">mailto: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=""><<a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a>><br class=""><br class=""></blockquote><br class="">--<br class="">Dave<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="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a>><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a>><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto: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=""><<a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</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=""><<a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</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=""><<a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</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=""><<a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a>>>><br class=""></blockquote>_______________________________________________<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="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a>><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto: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=""><<a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</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=""><<a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a>>><br class=""><br class=""></blockquote><br class="">--<br class="">Dave<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="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a>><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto:swift-evolution@swift.org</a><br class=""><<a href="mailto:swift-evolution@swift.org" class="">mailto: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=""><<a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</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=""><<a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a>>><br class=""></blockquote></blockquote><br class="">--<br class="">Dave<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="mailto:swift-evolution@swift.org" class="">mailto: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=""><<a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a>><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="mailto:swift-evolution@swift.org" class="">mailto: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=""><<a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a>><br class=""></blockquote>_______________________________________________<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=""><br class=""></blockquote><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: 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-caps: 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><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: 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-caps: 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="">Dave</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: 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=""><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: 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-caps: 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-caps: normal; font-weight: normal; letter-spacing: 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