<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=""><div class="">The only proposal that's in review is the one on github at Swift Evolution.</div><div class=""><br class=""></div><div class="">I have been putting together another version as a courtesy for Dave A, to flesh out how the alternative approach would look if the alternative was the primary proposal. That one is a personal gist.</div><div class=""><br class=""></div><div class="">-- E</div><div class=""><br class=""></div><br class=""><div><blockquote type="cite" class=""><div class="">On Jun 30, 2016, at 12:00 PM, Xiaodi Wu 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="">As a meta-issue, it's been hard to make meaningful commentary during this review process because the latest proposal has been so rapidly shifting throughout. What, exactly, is the version we are reviewing at the moment? Can we have a few days to mull over that version specifically?<br class=""><div class="gmail_quote"><div dir="ltr" class="">On Thu, Jun 30, 2016 at 12:24 David Sweeris via swift-evolution <<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word" class="">Agreed. Also, if we’re supposed to say `MemoryLayout.of()` now, does MemoryLayout still need a public init? Half of the proposal’s problems revolve around the likely-unexpected behavior caused by passing T.self to the init function (although, argument labels would also solve the issue).<div class=""><br class=""></div><div class="">- Dave Sweeris</div></div><div style="word-wrap:break-word" class=""><div class=""><br class=""><div class="">On Jun 29, 2016, at 10:05 PM, Jacob Bandes-Storch via swift-evolution <<a href="mailto:swift-evolution@swift.org" target="_blank" class="">swift-evolution@swift.org</a>> wrote:<div class=""><blockquote type="cite" class=""><br class=""><div class=""><div dir="ltr" class="">I'm not sure this bikeshed is the right color yet.<br class=""><div class=""><br class=""></div><div class="">How does the user remember the distinction between MemoryLayout<Int> and MemoryLayout.of(Int) ? To keep it clear, how about ofValue() rather than of() ?</div><div class=""><br class=""></div><div class="">Also, could the implementation be simply</div><div class=""><br class=""></div><div class=""> static func ofValue(_ value: @autoclosure () -> T) -> MemoryLayout<T>.Type {</div><div class=""> return self</div><div class=""> }</div><div class=""><br class=""></div><div class="">?</div><div class="gmail_extra"><br clear="all" class=""><div class=""><div data-smartmail="gmail_signature" class=""><div dir="ltr" class=""><div class="">Jacob<br class=""></div></div></div></div>
<br class=""><div class="gmail_quote">On Wed, Jun 29, 2016 at 7:36 PM, Erica Sadun via swift-evolution <span dir="ltr" class=""><<a href="mailto:swift-evolution@swift.org" target="_blank" class="">swift-evolution@swift.org</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word" class=""><span class=""><br class=""><div class=""><blockquote type="cite" class=""><div class="">On Jun 29, 2016, at 3:59 PM, Xiaodi Wu via swift-evolution <<a href="mailto:swift-evolution@swift.org" target="_blank" class="">swift-evolution@swift.org</a>> wrote:</div><br class=""><div class=""><div dir="ltr" class=""><div class="gmail_extra"><div class="gmail_quote">On Wed, Jun 29, 2016 at 4:50 PM, David Sweeris <span dir="ltr" class=""><<a href="mailto:davesweeris@mac.com" target="_blank" class="">davesweeris@mac.com</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word" class="">That’s the “as proposed” usage for getting the size of a value (from <a href="https://gist.github.com/erica/57a64163870486468180b8bab8a6294e" target="_blank" class="">https://gist.github.com/erica/57a64163870486468180b8bab8a6294e</a>) <div class=""><pre style="font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:14px;margin-top:0px;margin-bottom:0px;line-height:1.45;word-wrap:normal;padding:16px;overflow:auto;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-break:normal;color:rgb(51,51,51)" class=""><span style="color:rgb(150,152,150)" class="">// Types</span>
MemoryLayout<span style="color:rgb(167,29,93)" class=""><</span><span style="color:rgb(0,134,179)" class="">Int</span><span style="color:rgb(167,29,93)" class="">>.</span>size <span style="color:rgb(150,152,150)" class="">// 8 </span>
MemoryLayout<span style="color:rgb(167,29,93)" class=""><</span><span style="color:rgb(0,134,179)" class="">Int</span><span style="color:rgb(167,29,93)" class="">>.</span>arraySpacing <span style="color:rgb(150,152,150)" class="">// 8</span>
MemoryLayout<span style="color:rgb(167,29,93)" class=""><</span><span style="color:rgb(0,134,179)" class="">Int</span><span style="color:rgb(167,29,93)" class="">>.</span>alignment <span style="color:rgb(150,152,150)" class="">// 8</span>
<span style="color:rgb(150,152,150)" class="">// Value</span>
<span style="color:rgb(167,29,93)" class="">let</span> x: <span style="color:rgb(0,134,179)" class="">UInt8</span> <span style="color:rgb(167,29,93)" class="">=</span> <span style="color:rgb(0,134,179)" class="">5</span>
MemoryLayout(x)<span style="color:rgb(167,29,93)" class="">.</span><span style="color:rgb(167,29,93)" class="">dynamicType</span><span style="color:rgb(167,29,93)" class="">.</span>size <span style="color:rgb(150,152,150)" class="">// 1</span>
MemoryLayout(<span style="color:rgb(24,54,145)" class=""><span class="">"</span>hello<span class="">"</span></span>)<span style="color:rgb(167,29,93)" class="">.</span><span style="color:rgb(167,29,93)" class="">dynamicType</span><span style="color:rgb(167,29,93)" class="">.</span>arraySpacing <span style="color:rgb(150,152,150)" class="">// 24</span>
MemoryLayout(<span style="color:rgb(0,134,179)" class="">29</span><span style="color:rgb(167,29,93)" class="">.</span><span style="color:rgb(0,134,179)" class="">2</span>)<span style="color:rgb(167,29,93)" class="">.</span><span style="color:rgb(167,29,93)" class="">dynamicType</span><span style="color:rgb(167,29,93)" class="">.</span>alignment <span style="color:rgb(150,152,150)" class="">// 8</span></pre><div class=""><br class=""></div><div class=""><br class=""></div>At least, I <i class="">thought</i> that was the latest version of the proposal. Maybe I’ve gotten confused.</div></div></blockquote><div class=""><br class=""></div><div class="">There must be a typo in these examples. `MemoryLayout(x.dynamicType).size` perhaps?</div></div></div></div></div></blockquote><br class=""></div></span><div class="">I have listened. I have updated.</div><div class=""><br class=""></div><div class=""><a href="https://gist.github.com/erica/57a64163870486468180b8bab8a6294e" target="_blank" class="">https://gist.github.com/erica/57a64163870486468180b8bab8a6294e</a></div><div class=""><br class=""></div><div class=""><span class=""><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;color:rgb(0,132,0)" class=""><span class="">// Types</span></div><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;color:rgb(79,129,135)" class=""><span class="">MemoryLayout</span><span class=""><</span><span style="color:#703daa" class="">Int</span><span class="">>.</span><span class="">size</span><span class=""> </span><span style="color:#008400" class="">// 8</span></div><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;color:rgb(79,129,135)" class=""><span class="">MemoryLayout</span><span class=""><</span><span style="color:#703daa" class="">Int</span><span class="">>.</span><span class="">arraySpacing</span><span class=""> </span><span style="color:#008400" class="">// 8</span></div><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;color:rgb(79,129,135)" class=""><span class="">MemoryLayout</span><span class=""><</span><span style="color:#703daa" class="">Int</span><span class="">>.</span><span class="">alignment</span><span class=""> </span><span style="color:#008400" class="">// 8</span></div><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;min-height:19px" class=""><span class=""></span><br class=""></div><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;color:rgb(0,132,0)" class=""><span class="">// Value</span></div><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo" class=""><span style="color:#bb2ca2" class="">let</span><span class=""> x: </span><span style="color:#703daa" class="">UInt8</span><span class=""> = </span><span style="color:#272ad8" class="">5</span></div></span><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;color:rgb(79,129,135)" class=""><span class="">MemoryLayout</span><span class="">.</span><span style="color:#31595d" class="">of</span><span class="">(</span><span class="">x</span><span class="">).</span><span class="">size</span><span class=""> </span><span style="color:#008400" class="">// 1</span></div><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;color:rgb(79,129,135)" class=""><span class="">MemoryLayout</span><span class="">.</span><span style="color:#31595d" class="">of</span><span class="">(</span><span style="color:#272ad8" class="">1</span><span class="">).</span><span class="">size</span><span class=""> </span><span style="color:#008400" class="">// 8</span></div><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;color:rgb(79,129,135)" class=""><span class="">MemoryLayout</span><span class="">.</span><span style="color:#31595d" class="">of</span><span class="">(</span><span style="color:#d12f1b" class="">"hello"</span><span class="">).</span><span class="">arraySpacing</span><span class=""> </span><span style="color:#008400" class="">// 24</span></div><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;color:rgb(79,129,135)" class=""><span class="">MemoryLayout</span><span class="">.</span><span style="color:#31595d" class="">of</span><span class="">(</span><span style="color:#272ad8" class="">29.2</span><span class="">).</span><span class="">alignment</span><span class=""> </span><span style="color:#008400" class="">// 8</span></div><span class=""><font color="#888888" class=""><div class=""><span style="color:#008400" class=""><br class=""></span></div><div class=""><span style="color:#008400" class=""><br class=""></span></div><div class=""><span style="color:#008400" class="">-- E</span></div></font></span></div><br class=""></div><br class="">_______________________________________________<br class="">
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