<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><p class="" style="-webkit-print-color-adjust: exact; margin-right: 0px; margin-bottom: 15px; margin-left: 0px; font-family: -apple-system-body, Helvetica, arial, sans-serif; background-color: rgb(255, 255, 255); margin-top: 0px !important;">Hello Swift community,</p><p class="" style="-webkit-print-color-adjust: exact; margin: 15px 0px; background-color: rgb(255, 255, 255);"><font face="-apple-system-body, Helvetica, arial, sans-serif" class="">The review of revisions to <b class="">SE-0176: </b><b class="">Enforce Exclusive Access to Memory</b><font face="-apple-system-body, Helvetica, arial, sans-serif" class=""> begins now and runs through </font><strong class="" style="-webkit-print-color-adjust: exact;">May 17, 2017</strong><font face="-apple-system-body, Helvetica, arial, sans-serif" class="">.</font></font></p><div class="">Most of this proposal was previously <b class="">accepted</b>. An implementation issue has been discovered with the use of dynamic enforcement on inout parameters. The proposal implementors suggest adopting a stronger rule governing the use of non-escaping closures which will also allow Swift to make firm guarantees about the use of static enforcement when a variable does not escape. The core team tentatively supports this new rule but believes it is a substantial enough revision that it requires a separate review period.</div><p class="" style="-webkit-print-color-adjust: exact; margin: 15px 0px; font-family: -apple-system-body, Helvetica, arial, sans-serif; background-color: rgb(255, 255, 255);">The proposal is available here: <a href="https://github.com/apple/swift-evolution/blob/master/proposals/0176-enforce-exclusive-access-to-memory.md" class="">https://github.com/apple/swift-evolution/blob/master/proposals/0176-enforce-exclusive-access-to-memory.md</a></p><div class="">Since this is a review of revisions only, you may find these two relevant commits easier:</div><div class=""><a href="https://github.com/apple/swift-evolution/commit/d61c07df2f02bee6c00528e73fbe33738288179a" class="">https://github.com/apple/swift-evolution/commit/d61c07df2f02bee6c00528e73fbe33738288179a</a></div><div class=""><a href="https://github.com/apple/swift-evolution/commit/5205a61f9cdca918d896269521bf89cb11e4aa12" class="">https://github.com/apple/swift-evolution/commit/5205a61f9cdca918d896269521bf89cb11e4aa12</a></div><div class=""><br class=""></div><div class=""><span style="font-family: -apple-system-body, Helvetica, arial, sans-serif; background-color: rgb(255, 255, 255);" class="">Reviews are an important part of the Swift evolution process. All reviews should be sent to the swift-evolution mailing list at:</span></div><p class="" style="-webkit-print-color-adjust: exact; margin: 15px 0px; font-family: -apple-system-body, Helvetica, arial, sans-serif; background-color: rgb(255, 255, 255);"><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a></p><p class="" style="-webkit-print-color-adjust: exact; margin: 15px 0px; font-family: -apple-system-body, Helvetica, arial, sans-serif; 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 class="" style="-webkit-print-color-adjust: exact; margin: 15px 0px; border-left-width: 4px; border-left-style: solid; border-left-color: rgb(221, 221, 221); padding: 0px 15px; color: rgb(119, 119, 119); font-family: -apple-system-body, Helvetica, arial, sans-serif; background-color: rgb(255, 255, 255);"><h3 id="toc_0" class="" style="-webkit-print-color-adjust: exact; margin: 0px 0px 10px; padding: 0px; -webkit-font-smoothing: antialiased; cursor: text; position: relative; font-size: 18px;">Proposal link:</h3><blockquote class="" style="-webkit-print-color-adjust: exact; margin: 15px 0px 0px; border-left-width: 4px; border-left-style: solid; border-left-color: rgb(221, 221, 221); padding: 0px 15px;"><p class="" style="-webkit-print-color-adjust: exact; margin: 0px 0px 15px;"></p><h3 id="toc_1" class="" style="-webkit-print-color-adjust: exact; margin: 20px 0px 10px; padding: 0px; -webkit-font-smoothing: antialiased; cursor: text; position: relative; font-size: 18px;"><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-weight: normal;" class=""><a href="https://github.com/apple/swift-evolution/blob/master/proposals/0176-enforce-exclusive-access-to-memory.md" class="">https://github.com/apple/swift-evolution/blob/master/proposals/0176-enforce-exclusive-access-to-memory.md</a></div><div class=""><br class=""></div></h3><h3 id="toc_1" class="" style="-webkit-print-color-adjust: exact; margin: 20px 0px 10px; padding: 0px; -webkit-font-smoothing: antialiased; cursor: text; position: relative; font-size: 18px;">Reply text</h3><p class="" style="-webkit-print-color-adjust: exact; margin: 15px 0px 0px;">Other replies</p></blockquote></blockquote><h3 id="toc_2" class="" style="-webkit-print-color-adjust: exact; margin: 20px 0px 10px; padding: 0px; -webkit-font-smoothing: antialiased; cursor: text; position: relative; font-size: 18px; font-family: -apple-system-body, Helvetica, arial, sans-serif; background-color: rgb(255, 255, 255);">What goes into a review?</h3><p class="" style="-webkit-print-color-adjust: exact; margin: 15px 0px; font-family: -apple-system-body, Helvetica, arial, sans-serif; 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 class="" style="-webkit-print-color-adjust: exact; margin: 15px 0px; padding-left: 30px; font-family: -apple-system-body, Helvetica, arial, sans-serif; background-color: rgb(255, 255, 255);"><li class="" style="-webkit-print-color-adjust: exact; margin: 0px;">What is your evaluation of the proposal?</li><li class="" style="-webkit-print-color-adjust: exact; margin: 0px;">Is the problem being addressed significant enough to warrant a change to Swift?</li><li class="" style="-webkit-print-color-adjust: exact; margin: 0px;">Does this proposal fit well with the feel and direction of Swift?</li><li class="" style="-webkit-print-color-adjust: exact; margin: 0px;">If you have used other languages or libraries with a similar feature, how do you feel that this proposal compares to those?</li><li class="" style="-webkit-print-color-adjust: exact; margin: 0px;">How much effort did you put into your review? A glance, a quick reading, or an in-depth study?</li></ul><p class="" style="-webkit-print-color-adjust: exact; margin: 15px 0px; font-family: -apple-system-body, Helvetica, arial, sans-serif; background-color: rgb(255, 255, 255);">More information about the Swift evolution process is available at:</p><p class="" style="-webkit-print-color-adjust: exact; margin: 15px 0px; font-family: -apple-system-body, Helvetica, arial, sans-serif; background-color: rgb(255, 255, 255);"><a href="https://github.com/apple/swift-evolution/blob/master/process.md" class="" style="-webkit-print-color-adjust: exact; color: rgb(65, 131, 196);">https://github.com/apple/swift-evolution/blob/master/process.md</a></p><p class="" style="-webkit-print-color-adjust: exact; margin: 15px 0px; font-family: -apple-system-body, Helvetica, arial, sans-serif; background-color: rgb(255, 255, 255);">Thank you,</p></body></html>