<div dir="ltr">+1 from me as well</div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Feb 17, 2016 at 12:08 PM, Thorsten Seitz via swift-evolution <span dir="ltr"><<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div></div><div>+1 to the proposal</div><div><br></div><div>-Thorsten </div><div><div class="h5"><div><br>Am 17.02.2016 um 02:05 schrieb Erica Sadun via swift-evolution <<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>>:<br><br></div><blockquote type="cite"><div><div>Adding:</div><div><br></div><div><div><pre style="overflow:auto;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;margin-top:0px;margin-bottom:0px;line-height:1.45;padding:16px;background-color:rgb(247,247,247);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px;word-wrap:normal;word-break:normal;color:rgb(51,51,51)"><span style="color:rgb(167,29,93)">@available</span>(<span style="color:rgb(167,29,93)">*</span>, unavailable, renamed: <span style="color:rgb(24,54,145)"><span>"</span>MyRenamedProtocol<span>"</span></span>)
<span style="color:rgb(167,29,93)">typealias</span> MyProtocol <span style="color:rgb(167,29,93)">=</span> MyRenamedProtocol
<span style="color:rgb(167,29,93)">@warn_unused_result</span>(mutable_variant: <span style="color:rgb(24,54,145)"><span>"</span>sortInPlace<span>"</span></span>)
<span style="color:rgb(167,29,93)">public</span> <span style="color:rgb(167,29,93)">func</span> <span style="color:rgb(121,93,163)">sort</span>() <span style="color:rgb(167,29,93)">-></span> [Self.Generator.Element]
<span style="color:rgb(167,29,93)">@available</span>(<span style="color:rgb(167,29,93)">*</span>, deprecated, message: <span style="color:rgb(24,54,145)"><span>"</span>it will be removed in Swift 3. Use the 'generate()' method on the collection.<span>"</span></span>)
<span style="color:rgb(167,29,93)">public</span> <span style="color:rgb(167,29,93)">init</span>(_ bounds: <span style="color:rgb(0,134,179)">Range</span><span style="color:rgb(167,29,93)"><</span>Element<span style="color:rgb(167,29,93)">></span>)</pre><div><br></div></div></div><div>gist: <a href="https://gist.github.com/erica/d96011a5c22d9b995b91" target="_blank">https://gist.github.com/erica/d96011a5c22d9b995b91</a></div><div><br></div><div>-- E</div><br><div><blockquote type="cite"><div>On Feb 16, 2016, at 5:43 PM, Charles Kissinger <<a href="mailto:crk@akkyra.com" target="_blank">crk@akkyra.com</a>> wrote:</div><br><div><div style="word-wrap:break-word"><br><div><blockquote type="cite"><div>On Feb 16, 2016, at 4:08 PM, Erica Sadun via swift-evolution <<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>> wrote:</div><br><div><div style="word-wrap:break-word">Ricardo,<div><br></div><div>This proposal is so narrow that I believe *every single example possible* is already in there under motivation. Just sub out each "=" for ":" and you have the entire extent of the change.</div></div></div></blockquote><div><br></div>Hi Erica,</div><div><br></div><div>I think Ricardo means full examples of the new style, including @ symbol, attribute-name, parens, attribute argument label and example attribute arguments. There are no full examples in the proposal of either the existing or proposed style.</div><div><br></div><div>It might seem nit-picky (and it is :-)), but that’s the only way for us to evaluate how it will actually look in practice. (Yes, we could look up a few and type them in somewhere ourselves, but it would be nice to have them in the proposal.)</div><div><br></div><div>—CK</div><div> <br><blockquote type="cite"><div><div style="word-wrap:break-word"><div><br></div><div>-- Erica</div><div><br><div><blockquote type="cite"><div>On Feb 16, 2016, at 5:03 PM, Ricardo Parada <<a href="mailto:rparada@mac.com" target="_blank">rparada@mac.com</a>> wrote:</div><br><div><div style="word-wrap:break-word">Hi Erica,<div><br></div><div>I understand this is a draft and even though it may be obvious to many, I would add a few examples with the proposed solution.</div><div><br></div><div>Thanks</div><div>Ricardo Parada</div><div><br></div><div><br><div><blockquote type="cite"><div>On Feb 16, 2016, at 5:42 PM, Erica Sadun via swift-evolution <<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>> wrote:</div><br><div><div style="word-wrap:break-word"><h1 style="margin-right:0px;margin-bottom:16px;margin-left:0px;line-height:1.2;padding-bottom:0.3em;border-bottom-width:1px;border-bottom-style:solid;border-bottom-color:rgb(238,238,238);color:rgb(51,51,51);background-color:rgb(255,255,255);margin-top:0px!important"><font face="Helvetica"><span style="font-size:12px;font-weight:normal">Thoughts and feedback appreciated. Thank you, -- Erica</span></font></h1><div><font face="Helvetica"><span style="font-size:12px;font-weight:normal"><br></span></font></div><div><font face="Helvetica"><span style="font-size:12px;font-weight:normal"><br></span></font></div><h1 style="margin-right:0px;margin-bottom:16px;margin-left:0px;line-height:1.2;padding-bottom:0.3em;border-bottom-width:1px;border-bottom-style:solid;border-bottom-color:rgb(238,238,238);color:rgb(51,51,51);background-color:rgb(255,255,255);font-size:21px;margin-top:0px!important"><span style="font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';font-size:56px">Replacing Equal Signs with Colons For Attribute Arguments</span></h1><ul style="padding:0px 0px 0px 2em;margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';font-size:16px;background-color:rgb(255,255,255)"><li>Proposal: TBD</li><li>Author(s): <a href="http://github.com/erica" style="background-color:transparent;color:rgb(64,120,192);text-decoration:none" target="_blank">Erica Sadun</a></li><li>Status: TBD</li><li>Review manager: TBD</li></ul><h2 style="margin-top:1em;margin-bottom:16px;line-height:1.225;font-size:1.75em;padding-bottom:0.3em;border-bottom-width:1px;border-bottom-style:solid;border-bottom-color:rgb(238,238,238);color:rgb(51,51,51);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';background-color:rgb(255,255,255)"><a href="https://gist.github.com/erica/d96011a5c22d9b995b91#introduction" style="background-color:transparent;color:rgb(64,120,192);text-decoration:none;display:inline-block;padding-right:2px;line-height:1" target="_blank"><u></u><u></u><u></u><u></u></a>Introduction</h2><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';font-size:16px;background-color:rgb(255,255,255)">Attribute arguments are unlike other Swift language arguments. At the call site, they use <code style="font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:14px;padding:0.2em 0px;margin:0px;background-color:rgba(0,0,0,0.0392157);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px">=</code> instead of colons to distinguish argument names from passed values. This proposal brings attributes into compliance with Swift standard practices by replacing the use of "=" with ":" in this one-off case.</p><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';font-size:16px;background-color:rgb(255,255,255)"><em>Discussion took place on the Swift Evolution mailing list in the [Discussion] Replacing Equal Signs with Colons For Attribute Arguments thread. Thanks to <a href="https://github.com/DougGregor" style="background-color:transparent;color:rgb(64,120,192);text-decoration:none" target="_blank">Doug Gregor</a> for suggesting this enhancement.</em></p><h2 style="margin-top:1em;margin-bottom:16px;line-height:1.225;font-size:1.75em;padding-bottom:0.3em;border-bottom-width:1px;border-bottom-style:solid;border-bottom-color:rgb(238,238,238);color:rgb(51,51,51);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';background-color:rgb(255,255,255)"><a href="https://gist.github.com/erica/d96011a5c22d9b995b91#motivation" style="background-color:transparent;color:rgb(64,120,192);text-decoration:none;display:inline-block;padding-right:2px;line-height:1" target="_blank"><u></u><u></u><u></u><u></u></a>Motivation</h2><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';font-size:16px;background-color:rgb(255,255,255)">Attributes enable developers to annotate declarations and types with keywords that constrain behavior. Recognizable by their <a href="http://foldoc.org/strudel" style="background-color:transparent;color:rgb(64,120,192);text-decoration:none" target="_blank">at-sign</a> "@" prefix, attributes communicate features, characteristics, restrictions, and expectations of types and declarations to the Swift compiler. Common attributes include <code style="font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:14px;padding:0.2em 0px;margin:0px;background-color:rgba(0,0,0,0.0392157);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px">@noescape</code> for parameters that cannot outlive the lifetime of a call, <code style="font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:14px;padding:0.2em 0px;margin:0px;background-color:rgba(0,0,0,0.0392157);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px">@convention</code>, to indicates whether a type's calling conventions follows a Swift, C, or (Objective-C) block model, and <code style="font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:14px;padding:0.2em 0px;margin:0px;background-color:rgba(0,0,0,0.0392157);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px">@available</code> to enumerate a declaration's compatibility with platform and OS versions. Swift currently offers about a dozen distinct attributes, and is likely to expand this vocabulary in future language updates.</p><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';font-size:16px;background-color:rgb(255,255,255)">Some attributes accept arguments: <code style="font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:14px;padding:0.2em 0px;margin:0px;background-color:rgba(0,0,0,0.0392157);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px">@attribute-name(attribute-arguments)</code> including <code style="font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:14px;padding:0.2em 0px;margin:0px;background-color:rgba(0,0,0,0.0392157);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px">@available</code> and <code style="font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:14px;padding:0.2em 0px;margin:0px;background-color:rgba(0,0,0,0.0392157);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px">@warn_unused_result</code>. In the current grammar, an equal sign separates attribute argument keywords from values:</p><div style="margin-bottom:16px;color:rgb(51,51,51);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';font-size:16px;background-color:rgb(255,255,255)"><pre style="overflow:auto;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:14px;margin-top:0px;margin-bottom:0px;line-height:1.45;padding:16px;background-color:rgb(247,247,247);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px;word-wrap:normal;word-break:normal">introduced<span style="color:rgb(167,29,93)">=</span>version<span style="color:rgb(167,29,93)">-</span>number
deprecated<span style="color:rgb(167,29,93)">=</span>version<span style="color:rgb(167,29,93)">-</span>number
obsoleted<span style="color:rgb(167,29,93)">=</span>version<span style="color:rgb(167,29,93)">-</span>number
message<span style="color:rgb(167,29,93)">=</span>message
renamed<span style="color:rgb(167,29,93)">=</span>new<span style="color:rgb(167,29,93)">-</span>name
mutable_variant<span style="color:rgb(167,29,93)">=</span>method<span style="color:rgb(167,29,93)">-</span>name</pre></div><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';font-size:16px;background-color:rgb(255,255,255)">Using <code style="font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:14px;padding:0.2em 0px;margin:0px;background-color:rgba(0,0,0,0.0392157);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px">=</code> is out of step with other Swift parameterization call-site patterns. Tweaking the grammar to match the rest of Swift introduces a small change that adds consistency across the language.</p><div style="margin-bottom:16px;color:rgb(51,51,51);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';font-size:16px;background-color:rgb(255,255,255)"><pre style="overflow:auto;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:14px;margin-top:0px;margin-bottom:0px;line-height:1.45;padding:16px;background-color:rgb(247,247,247);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px;word-wrap:normal;word-break:normal">parameter name: parameter value</pre></div><h2 style="margin-top:1em;margin-bottom:16px;line-height:1.225;font-size:1.75em;padding-bottom:0.3em;border-bottom-width:1px;border-bottom-style:solid;border-bottom-color:rgb(238,238,238);color:rgb(51,51,51);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';background-color:rgb(255,255,255)"><a href="https://gist.github.com/erica/d96011a5c22d9b995b91#detail-design" style="background-color:transparent;color:rgb(64,120,192);text-decoration:none;display:inline-block;padding-right:2px;line-height:1" target="_blank"><u></u><u></u><u></u><u></u></a>Detail Design</h2><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';font-size:16px;background-color:rgb(255,255,255)">This proposal replaces the use of <code style="font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:14px;padding:0.2em 0px;margin:0px;background-color:rgba(0,0,0,0.0392157);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px">=</code> with <code style="font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:14px;padding:0.2em 0px;margin:0px;background-color:rgba(0,0,0,0.0392157);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px">:</code> in the balanced tokens used to compose an attribute argument clause along the following lines:</p><div style="margin-bottom:16px;color:rgb(51,51,51);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';font-size:16px;background-color:rgb(255,255,255)"><pre style="overflow:auto;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:14px;margin-top:0px;margin-bottom:0px;line-height:1.45;padding:16px;background-color:rgb(247,247,247);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px;word-wrap:normal;word-break:normal">attribute → @ attribute<span style="color:rgb(167,29,93)">-</span>name attribute<span style="color:rgb(167,29,93)">-</span>argument<span style="color:rgb(167,29,93)">-</span>clause<span style="color:rgb(167,29,93)"><</span>sub<span style="color:rgb(167,29,93)">></span>opt<span style="color:rgb(167,29,93)"></</span>sub<span style="color:rgb(167,29,93)">></span>
attribute<span style="color:rgb(167,29,93)">-</span>name → identifier
attribute<span style="color:rgb(167,29,93)">-</span>argument<span style="color:rgb(167,29,93)">-</span>clause → ( balanced<span style="color:rgb(167,29,93)">-</span>tokens<span style="color:rgb(167,29,93)"><</span>sub<span style="color:rgb(167,29,93)">></span>opt<span style="color:rgb(167,29,93)"><</span>opt<span style="color:rgb(167,29,93)">></span> )
balanced<span style="color:rgb(167,29,93)">-</span>tokens → balanced<span style="color:rgb(167,29,93)">-</span>token
balanced<span style="color:rgb(167,29,93)">-</span>tokens → balanced<span style="color:rgb(167,29,93)">-</span>token, balanced<span style="color:rgb(167,29,93)">-</span>tokens
balanced<span style="color:rgb(167,29,93)">-</span>token → attribute<span style="color:rgb(167,29,93)">-</span>argument<span style="color:rgb(167,29,93)">-</span>label <span style="color:rgb(167,29,93)">:</span> attribute argument<span style="color:rgb(167,29,93)">-</span>value</pre></div><p style="margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';font-size:16px;background-color:rgb(255,255,255)">This design can be summarized as "wherever current Swift attributes use <code style="font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:14px;padding:0.2em 0px;margin:0px;background-color:rgba(0,0,0,0.0392157);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px">=</code>, use <code style="font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:14px;padding:0.2em 0px;margin:0px;background-color:rgba(0,0,0,0.0392157);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px">:</code> instead".</p><h2 style="margin-top:1em;margin-bottom:16px;line-height:1.225;font-size:1.75em;padding-bottom:0.3em;border-bottom-width:1px;border-bottom-style:solid;border-bottom-color:rgb(238,238,238);color:rgb(51,51,51);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';background-color:rgb(255,255,255)"><a href="https://gist.github.com/erica/d96011a5c22d9b995b91#alternatives-considered" style="background-color:transparent;color:rgb(64,120,192);text-decoration:none;display:inline-block;padding-right:2px;line-height:1" target="_blank"><u></u><u></u><u></u><u></u></a>Alternatives Considered</h2><div style="margin-top:0px;color:rgb(51,51,51);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';font-size:16px;background-color:rgb(255,255,255);margin-bottom:0px!important">There are no alternatives to put forth other than not accepting this proposal.</div></div>_______________________________________________<br>swift-evolution mailing list<br><a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a><br><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" target="_blank">https://lists.swift.org/mailman/listinfo/swift-evolution</a><br></div></blockquote></div><br></div></div></div></blockquote></div><br></div></div>_______________________________________________<br>swift-evolution mailing list<br><a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a><br><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" target="_blank">https://lists.swift.org/mailman/listinfo/swift-evolution</a><br></div></blockquote></div><br></div></div></blockquote></div><br></div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>swift-evolution mailing list</span><br><span><a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a></span><br><span><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" target="_blank">https://lists.swift.org/mailman/listinfo/swift-evolution</a></span><br></div></blockquote></div></div></div><br>_______________________________________________<br>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature">Trent Nadeau</div>
</div>