<div dir="ltr">I think that overall this is a good operator that eventually should get in. At this point though the wins that this would bring are probably not worth the added complexity to the language.<div><br></div><div>As Joe said the primary use case for the hammer operator `||=` in ruby is not even covered by this operator, so it’s use would be far more limited than in those languages.</div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature">-Tal</div></div>
<br><div class="gmail_quote">On Sat, Feb 13, 2016 at 12:15 AM, Douglas Gregor 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 style="word-wrap:break-word"><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)">Hello Swift community,</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)">The review of SE-0024 "Optional Value Setter `??=`" begins now and runs through February 18, 2016. The proposal is available here:</p><blockquote style="margin:0px 0px 16px;padding:0px 15px;border-left-width:4px;border-left-style:solid;border-left-color:rgb(221,221,221);background-color:rgb(255,255,255)"><div style="margin-top:0px;margin-bottom:0px"><font color="#777777" face="Helvetica Neue, Helvetica, Segoe UI, Arial, freesans, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" size="3"><a href="https://github.com/apple/swift-evolution/blob/master/proposals/0024-optional-value-setter.md" target="_blank">https://github.com/apple/swift-evolution/blob/master/proposals/0024-optional-value-setter.md</a></font></div></blockquote><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)">Reviews are an important part of the Swift evolution process. All reviews should be sent to the swift-evolution mailing list at</p><blockquote style="margin:0px 0px 16px;padding:0px 15px;color:rgb(119,119,119);border-left-width:4px;border-left-style:solid;border-left-color:rgb(221,221,221);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)"><div style="margin-top:0px;margin-bottom:0px"><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" style="background-color:transparent;color:rgb(64,120,192);text-decoration:none" target="_blank">https://lists.swift.org/mailman/listinfo/swift-evolution</a></div></blockquote><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)">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:</p><blockquote style="margin:0px 0px 16px;padding:0px 15px;border-left-width:4px;border-left-style:solid;border-left-color:rgb(221,221,221);background-color:rgb(255,255,255)"><p style="color:rgb(119,119,119);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';font-size:16px;margin-top:0px;margin-bottom:16px">Proposal link:</p><blockquote style="margin:0px 0px 16px;padding:0px 15px;border-left-width:4px;border-left-style:solid;border-left-color:rgb(221,221,221)"><div style="margin-top:0px;margin-bottom:0px"><font color="#777777" face="Helvetica Neue, Helvetica, Segoe UI, Arial, freesans, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol" size="3"><a href="https://github.com/apple/swift-evolution/blob/master/proposals/0024-optional-value-setter.md" target="_blank">https://github.com/apple/swift-evolution/blob/master/proposals/0024-optional-value-setter.md</a></font></div></blockquote><p style="color:rgb(119,119,119);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';font-size:16px;margin-top:0px;margin-bottom:16px">Reply text</p><blockquote style="color:rgb(119,119,119);font-family:'Helvetica Neue',Helvetica,'Segoe UI',Arial,freesans,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';font-size:16px;margin:0px;padding:0px 15px;border-left-width:4px;border-left-style:solid;border-left-color:rgb(221,221,221)"><div style="margin-top:0px;margin-bottom:0px">Other replies</div></blockquote></blockquote><h5 style="margin-top:1em;margin-bottom:16px;line-height:1.4;font-size:1em;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://github.com/apple/swift-evolution#what-goes-into-a-review-1" style="background-color:transparent;color:rgb(64,120,192);text-decoration:none;display:inline-block;padding-right:2px;line-height:1.1" target="_blank"><u></u><u></u><u></u><u></u></a>What goes into a review?</h5><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)">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:</p><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>What is your evaluation of the proposal?</li><li>Is the problem being addressed significant enough to warrant a change to Swift?</li><li>Does this proposal fit well with the feel and direction of Swift?</li><li>If you have used other languages or libraries with a similar feature, how do you feel that this proposal compares to those?</li><li>How much effort did you put into your review? A glance, a quick reading, or an in-depth study?</li></ul><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)">More information about the Swift evolution process is available at</p><blockquote style="margin:0px 0px 16px;padding:0px 15px;color:rgb(119,119,119);border-left-width:4px;border-left-style:solid;border-left-color:rgb(221,221,221);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)"><div style="margin-top:0px;margin-bottom:0px"><a href="https://github.com/apple/swift-evolution/blob/master/process.md" style="background-color:transparent;color:rgb(64,120,192);text-decoration:none" target="_blank">https://github.com/apple/swift-evolution/blob/master/process.md</a></div></blockquote><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)">Thank you,</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)">Doug Gregor</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)">Review Manager</p></div><br>_______________________________________________<br>
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