<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="">+1.</div><div class=""><br class=""></div><div class="">I’m in the camp of people who would want an explicit version of this to make an eventual return, ideally as part of a broader suite of "tuple-manipulation operations”.</div><div class=""><br class=""></div><div class="">In such a proposal I’d hope to see, for example, splatting, but also compiler-assistance for things like:</div><div class=""><br class=""></div><div class="">- tuple-concatenation: (a,b)##(c,d) => (a,b,c,d)</div><div class="">- tuple-flattening: (a,(b,(c,d))#flatten => (a,b,c,d)</div><div class="">- tuple-rearrange: (a,b,c,d)#rearrange(($2,$1),($4,$3)) => ((b,a),(d,c))</div><div class="">- tuple-relabel: (a,b,c,d)#relabel(foo:,bar:,baz:,qux:) => (foo: a, bar: b, baz: c, qux: d)</div><div class="">- tuple-unlabel: (foo: a, bar: b, baz: c, qux: d)#unlabel => (a,b,c,d)</div><div class=""><br class=""></div><div class="">…with the above as examples of the kinds of operations, and not really the syntax; whatever’s chosen, it ought to be possible — although perhaps not *advisable* — to write e.g.:</div><div class=""><br class=""></div><div class="">// plz use a dedicated “zip4" in real life:</div><div class="">for (a,b,c,d) in zip(zip(as,bs),zip(cs,ds)).lazy.map(#flatten) { … }</div><div class=""><br class=""></div><div class="">…but that’s enough about tuple operations for now, I just wanted to illustrate some of the operations that be supported. </div><div class=""><br class=""></div><div class="">Moving on, as I’m in favor of the proposal as it stands, I don’t have anything to contribute to the proposal itself.</div><div class=""><br class=""></div><div class="">That said, I *do* think it’s unwise to infer too much from low rates of use for implicit tuple splatting at this time; it seems a little unfair to treat “this feature doesn’t work" and "no one seems to be using it” as *independent* variables, here.</div><div class=""><br class=""></div><div class="">As one such example, I implemented a large amount of a largely-declarative, combinator-ish “JSON parsing” library that would’ve made heavy use of tuple-splatting *if* it actually worked, but as splatting wound up seeming troublesome I gave up trying to use splatting. </div><div class=""><br class=""></div><div class="">FWIW not having splatting doesn’t change the size of the *library* code very much, but makes each site-of-use substantially-larger.</div><br class=""><div><blockquote type="cite" class=""><div class="">On Feb 5, 2016, at 12:12 PM, Joe Groff 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=""><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="">Hello Swift community,<br class=""><br class="">The review of “Remove implicit tuple splat behavior from function applications” begins now and runs through February 9, 2016. The proposal is available here:<br class=""><br class=""><blockquote style="margin: 0 0 0 40px; border: none; padding: 0px;" class=""><a href="https://github.com/apple/swift-evolution/blob/master/proposals/0029-remove-implicit-tuple-splat.md" class="">https://github.com/apple/swift-evolution/blob/master/proposals/0029-remove-implicit-tuple-splat.md</a></blockquote><div class=""><br class="">Reviews are an important part of the Swift evolution process. All reviews should be sent to the swift-evolution mailing list at<br class=""><br class=""></div><blockquote style="margin: 0 0 0 40px; border: none; padding: 0px;" class=""><div class=""><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a></div></blockquote><div class=""><br class="">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:<br class=""><br class=""></div><blockquote style="margin: 0 0 0 40px; border: none; padding: 0px;" class=""><div class="">Proposal link:</div><div class=""><br class=""></div><div class=""><a href="http://github.com/apple/swift-evolution/blob/master/proposals/0029-remove-implicit-tuple-splat.md" class="">http://github.com/apple/swift-evolution/blob/master/proposals/0029-remove-implicit-tuple-splat.md</a></div><div class=""><br class=""></div><div class="">Reply text</div><div class=""><br class=""></div><div class="">Other replies</div><div class=""><br class=""></div></blockquote><div class=""><b class="">What goes into a review?<br class=""></b><br class="">The goal of the review process is to improve the proposal under review through constructive criticism and, eventually, determine the direction of Swift. When writing your review, here are some questions you might want to answer in your review:<br class=""><br class=""><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>• What is your evaluation of the proposal?<br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>• Is the problem being addressed significant enough to warrant a change to Swift?<br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>• Does this proposal fit well with the feel and direction of Swift?<br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>• If you have used other languages or libraries with a similar feature, how do you feel that this proposal compares to those?<br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>• How much effort did you put into your review? A glance, a quick reading, or an in-depth study?<br class=""></div><div class=""><br class=""></div>More information about the Swift evolution process is available at<br class=""><br class=""></div><blockquote style="margin: 0 0 0 40px; border: none; padding: 0px;" class=""><div class=""><a href="https://github.com/apple/swift-evolution/blob/master/process.md" class="">https://github.com/apple/swift-evolution/blob/master/process.md</a></div></blockquote><div class=""><br class="">Thank you,<br class=""><br class="">-Joe<br class="">Review Manager</div></div>_______________________________________________<br class="">swift-evolution mailing list<br class=""><a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a><br class="">https://lists.swift.org/mailman/listinfo/swift-evolution<br class=""></div></blockquote></div><br class=""></body></html>