<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="">I’m not in favor of this proposal, and rather than repeat arguments that have already been made, I thought I’d share a small piece of data from the project I’m working on to illustrate the impact of implicit self in terms of reducing repetitive boilerplate cruft.<div class=""><br class=""></div><div class="">Our project consists of a legacy ObjC code base for an iOS app and a new version written entirely in Swift. The feature set is largely the same in both code bases, so it’s a good A vs B comparison.<div class=""><br class=""></div><div class="">In the Objective C version of the app, there are ~25,000 explicit references to self. (Keep in mind that this could easily have been a much bigger number if there weren’t such pervasive usage of ivars in the code.).</div><div class=""><br class=""></div><div class="">In the Swift version, there are ~1,000 explicit references to self, mostly in initializers and when passing self as an argument to a protocol — and about 10% of those would disappear with the proposal to allow implicit references to self with a strong capture list.</div><div class=""><br class=""></div><div class="">I know self is just a 4-letter word, and I know Swift’s goal isn’t to reduce character count simply for the sake of reducing character count, but it least for our project, avoiding “self”-blindness has really mode code more readable.<br class=""><div class=""><br class=""></div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Dec 16, 2015, at 1:55 PM, Douglas Gregor 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,<div class=""><br class=""><div class="">The review of “Require self for accessing instance members” begins now and runs through Sunday, December 20th. The proposal is available here:</div></div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space: pre;"> </span><a href="https://github.com/apple/swift-evolution/blob/master/proposals/0009-require-self-for-accessing-instance-members.md" class="">https://github.com/apple/swift-evolution/blob/master/proposals/0009-require-self-for-accessing-instance-members.md</a></div><div class=""><br class=""></div><div class=""><div class="">Reviews are an important part of the Swift evolution process. All reviews should be sent to the swift-evolution mailing list at</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space: pre;"> </span><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a></div><div class=""><br class=""></div><div class="">or, if you would like to keep your feedback private, directly to the review manager.</div><div class=""><br class=""></div><div class="">What goes into a review?</div><div class=""><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 you 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><br class=""></div><div class="">More information about the Swift evolution process is available at</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space: pre;"> </span><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><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space: pre;"> </span>Cheers,</div><div class=""><span class="Apple-tab-span" style="white-space: pre;"> </span>Doug Gregor</div><div class=""><span class="Apple-tab-span" style="white-space: pre;"> </span>Review Manager</div></div>
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