<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Correction/ Clarification. My assumption. The signature I am assuming is actually:<div class=""><br class=""></div><div class=""><br class=""></div><div class=""><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class=""><div class=""><table class="tab-size highlight js-file-line-container" data-tab-size="8" style="box-sizing: border-box; border-spacing: 0px; border-collapse: collapse; tab-size: 8; color: rgb(51, 51, 51); font-family: Helvetica, arial, nimbussansl, liberationsans, freesans, clean, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 13px;"><tbody class="" style="box-sizing: border-box;"><tr class="" style="box-sizing: border-box;"><td id="file-scalecrop-swift-LC6" class="js-file-line blob-code-inner blob-code" style="box-sizing: border-box; padding: 0px 10px; position: relative; vertical-align: top; overflow: visible; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 12px; word-wrap: normal; white-space: pre;"><span class="pl-k" style="box-sizing: border-box; color: rgb(167, 29, 93);">func</span> <span class="pl-en" style="box-sizing: border-box; color: rgb(121, 93, 163);">scaleAndCropImage</span>(</td></tr><tr class="" style="box-sizing: border-box;"><td id="file-scalecrop-swift-L7" class="blob-num js-line-number" data-line-number="7" style="box-sizing: border-box; padding: 0px 10px; width: 50px; min-width: 50px; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 12px; line-height: 18px; text-align: right; white-space: nowrap; vertical-align: top; cursor: pointer; -webkit-user-select: none; border-style: solid; border-color: rgb(238, 238, 238); border-width: 0px 1px 0px 0px;"></td><td id="file-scalecrop-swift-LC7" class="js-file-line blob-code-inner blob-code" style="box-sizing: border-box; padding: 0px 10px; position: relative; vertical-align: top; overflow: visible; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 12px; word-wrap: normal; white-space: pre;"> image: UIImage,</td></tr><tr class="" style="box-sizing: border-box;"><td id="file-scalecrop-swift-L8" class="blob-num js-line-number" data-line-number="8" style="box-sizing: border-box; padding: 0px 10px; width: 50px; min-width: 50px; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 12px; line-height: 18px; text-align: right; white-space: nowrap; vertical-align: top; cursor: pointer; -webkit-user-select: none; border-style: solid; border-color: rgb(238, 238, 238); border-width: 0px 1px 0px 0px;"></td><td id="file-scalecrop-swift-LC8" class="js-file-line blob-code-inner blob-code" style="box-sizing: border-box; padding: 0px 10px; position: relative; vertical-align: top; overflow: visible; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 12px; word-wrap: normal; white-space: pre;"> <span class="pl-en" style="box-sizing: border-box; color: rgb(121, 93, 163);">toSize</span> <span class="pl-smi" style="box-sizing: border-box;">size</span>: CGSize,</td></tr><tr class="" style="box-sizing: border-box;"><td id="file-scalecrop-swift-L9" class="blob-num js-line-number" data-line-number="9" style="box-sizing: border-box; padding: 0px 10px; width: 50px; min-width: 50px; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 12px; line-height: 18px; text-align: right; white-space: nowrap; vertical-align: top; cursor: pointer; -webkit-user-select: none; border-style: solid; border-color: rgb(238, 238, 238); border-width: 0px 1px 0px 0px;"></td><td id="file-scalecrop-swift-LC9" class="js-file-line blob-code-inner blob-code" style="box-sizing: border-box; padding: 0px 10px; position: relative; vertical-align: top; overflow: visible; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 12px; word-wrap: normal; white-space: pre;"> <b class="">fitImage: <span class="pl-c1" style="box-sizing: border-box; color: rgb(0, 134, 179);">Bool</span> <span class="pl-k" style="box-sizing: border-box; color: rgb(167, 29, 93);">=</span> <span class="pl-c1" style="box-sizing: border-box;"><font color="#ff2600" class=""><u class="">false</u></font></span></b></td></tr><tr class="" style="box-sizing: border-box;"><td id="file-scalecrop-swift-L10" class="blob-num js-line-number" data-line-number="10" style="box-sizing: border-box; padding: 0px 10px; width: 50px; min-width: 50px; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 12px; line-height: 18px; text-align: right; white-space: nowrap; vertical-align: top; cursor: pointer; -webkit-user-select: none; border-style: solid; border-color: rgb(238, 238, 238); border-width: 0px 1px 0px 0px;"></td><td id="file-scalecrop-swift-LC10" class="js-file-line blob-code-inner blob-code" style="box-sizing: border-box; padding: 0px 10px; position: relative; vertical-align: top; overflow: visible; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 12px; word-wrap: normal; white-space: pre;"> ) <span class="pl-k" style="box-sizing: border-box; color: rgb(167, 29, 93);">-></span> UIImage {</td></tr></tbody></table></div></div></div><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class=""><div class=""><div class=""><br class=""></div></div></div></div><div><blockquote type="cite" class=""><div class="">On May 31, 2016, at 3:27 PM, Hooman Mehr 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=us-ascii" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">If we go back to your original example:<div class=""><br class=""></div><div class=""><br class=""></div><div class=""><div class=""><br class=""></div><div class=""><table class="tab-size highlight js-file-line-container" data-tab-size="8" style="box-sizing: border-box; border-spacing: 0px; border-collapse: collapse; tab-size: 8; color: rgb(51, 51, 51); font-family: Helvetica, arial, nimbussansl, liberationsans, freesans, clean, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 13px;"><tbody class="" style="box-sizing: border-box;"><tr class="" style="box-sizing: border-box;"><td id="file-scalecrop-swift-LC6" class="js-file-line blob-code-inner blob-code" style="box-sizing: border-box; padding: 0px 10px; position: relative; vertical-align: top; overflow: visible; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 12px; word-wrap: normal; white-space: pre;"><span class="pl-k" style="box-sizing: border-box; color: rgb(167, 29, 93);">func</span> <span class="pl-en" style="box-sizing: border-box; color: rgb(121, 93, 163);">scaleAndCropImage</span>(</td></tr><tr class="" style="box-sizing: border-box;"><td id="file-scalecrop-swift-L7" class="blob-num js-line-number" data-line-number="7" style="box-sizing: border-box; padding: 0px 10px; width: 50px; min-width: 50px; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 12px; line-height: 18px; text-align: right; white-space: nowrap; vertical-align: top; cursor: pointer; -webkit-user-select: none; border-style: solid; border-color: rgb(238, 238, 238); border-width: 0px 1px 0px 0px;"></td><td id="file-scalecrop-swift-LC7" class="js-file-line blob-code-inner blob-code" style="box-sizing: border-box; padding: 0px 10px; position: relative; vertical-align: top; overflow: visible; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 12px; word-wrap: normal; white-space: pre;"> image: UIImage,</td></tr><tr class="" style="box-sizing: border-box;"><td id="file-scalecrop-swift-L8" class="blob-num js-line-number" data-line-number="8" style="box-sizing: border-box; padding: 0px 10px; width: 50px; min-width: 50px; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 12px; line-height: 18px; text-align: right; white-space: nowrap; vertical-align: top; cursor: pointer; -webkit-user-select: none; border-style: solid; border-color: rgb(238, 238, 238); border-width: 0px 1px 0px 0px;"></td><td id="file-scalecrop-swift-LC8" class="js-file-line blob-code-inner blob-code" style="box-sizing: border-box; padding: 0px 10px; position: relative; vertical-align: top; overflow: visible; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 12px; word-wrap: normal; white-space: pre;"> <span class="pl-en" style="box-sizing: border-box; color: rgb(121, 93, 163);">toSize</span> <span class="pl-smi" style="box-sizing: border-box;">size</span>: CGSize,</td></tr><tr class="" style="box-sizing: border-box;"><td id="file-scalecrop-swift-L9" class="blob-num js-line-number" data-line-number="9" style="box-sizing: border-box; padding: 0px 10px; width: 50px; min-width: 50px; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 12px; line-height: 18px; text-align: right; white-space: nowrap; vertical-align: top; cursor: pointer; -webkit-user-select: none; border-style: solid; border-color: rgb(238, 238, 238); border-width: 0px 1px 0px 0px;"></td><td id="file-scalecrop-swift-LC9" class="js-file-line blob-code-inner blob-code" style="box-sizing: border-box; padding: 0px 10px; position: relative; vertical-align: top; overflow: visible; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 12px; word-wrap: normal; white-space: pre;"> <b class="">fitImage: <span class="pl-c1" style="box-sizing: border-box; color: rgb(0, 134, 179);">Bool</span> <span class="pl-k" style="box-sizing: border-box; color: rgb(167, 29, 93);">=</span> <span class="pl-c1" style="box-sizing: border-box; color: rgb(0, 134, 179);">true</span></b></td></tr><tr class="" style="box-sizing: border-box;"><td id="file-scalecrop-swift-L10" class="blob-num js-line-number" data-line-number="10" style="box-sizing: border-box; padding: 0px 10px; width: 50px; min-width: 50px; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 12px; line-height: 18px; text-align: right; white-space: nowrap; vertical-align: top; cursor: pointer; -webkit-user-select: none; border-style: solid; border-color: rgb(238, 238, 238); border-width: 0px 1px 0px 0px;"></td><td id="file-scalecrop-swift-LC10" class="js-file-line blob-code-inner blob-code" style="box-sizing: border-box; padding: 0px 10px; position: relative; vertical-align: top; overflow: visible; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 12px; word-wrap: normal; white-space: pre;"> ) <span class="pl-k" style="box-sizing: border-box; color: rgb(167, 29, 93);">-></span> UIImage {</td></tr></tbody></table><div class=""><br class=""></div><div class="">There is a different type of sugar that I would like to have: Having label stand for `true` when we have a defaulted boolean flag, whose default value is false.</div><div class=""><br class=""></div><div class="">At call site we either say:</div><div class=""><br class=""></div><div class=""><span class="pl-en" style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; white-space: pre; box-sizing: border-box; color: rgb(121, 93, 163);">scaleAndCropImage</span><span style="color: rgb(51, 51, 51); font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; white-space: pre;" class="">(</span><span style="color: rgb(51, 51, 51); font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; white-space: pre;" class="">image: myImage, </span><span class="pl-en" style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; white-space: pre; box-sizing: border-box; color: rgb(121, 93, 163);">toSize:</span><span style="color: rgb(51, 51, 51); font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; white-space: pre;" class=""> myS</span><span class="pl-smi" style="color: rgb(51, 51, 51); font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; white-space: pre; box-sizing: border-box;">ize)</span></div><div class=""><span class="pl-smi" style="color: rgb(51, 51, 51); font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; white-space: pre; box-sizing: border-box;"><br class=""></span></div><div class=""><span class="pl-smi" style="color: rgb(51, 51, 51); font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; white-space: pre; box-sizing: border-box;">or: </span></div><div class=""><span class="pl-smi" style="color: rgb(51, 51, 51); font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; white-space: pre; box-sizing: border-box;"><br class=""></span></div><div class=""><span class="pl-smi" style="color: rgb(51, 51, 51); font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; white-space: pre; box-sizing: border-box;"><span class="pl-en" style="box-sizing: border-box; color: rgb(121, 93, 163);">scaleAndCropImage</span>(image: myImage, <span class="pl-en" style="box-sizing: border-box; color: rgb(121, 93, 163);">toSize:</span> myS<span class="pl-smi" style="box-sizing: border-box;">ize, <b class="">fitImage</b>)</span></span></div><div class=""><br class=""></div><div class="">We could still use:</div><div class=""><br class=""></div><div class=""><div class=""><span class="pl-smi" style="color: rgb(51, 51, 51); font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; white-space: pre; box-sizing: border-box;"><span class="pl-en" style="box-sizing: border-box; color: rgb(121, 93, 163);">scaleAndCropImage</span>(image: myImage, <span class="pl-en" style="box-sizing: border-box; color: rgb(121, 93, 163);">toSize:</span> myS<span class="pl-smi" style="box-sizing: border-box;">ize, <span class="">fitImage: true</span>)</span></span></div></div><div class="">or</div><div class=""><div class=""><span class="pl-smi" style="color: rgb(51, 51, 51); font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; white-space: pre; box-sizing: border-box;"><span class="pl-en" style="box-sizing: border-box; color: rgb(121, 93, 163);">scaleAndCropImage</span>(image: myImage, <span class="pl-en" style="box-sizing: border-box; color: rgb(121, 93, 163);">toSize:</span> myS<span class="pl-smi" style="box-sizing: border-box;">ize, <span class="">fitImage: false</span>)</span></span></div><div class=""><span class="pl-smi" style="color: rgb(51, 51, 51); font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; white-space: pre; box-sizing: border-box;"><span class="pl-smi" style="box-sizing: border-box;"><br class=""></span></span></div></div><div class="">Note that this is addressing a different situation: When we have multiple boolean flag parameters that can be combined like an OptionSet.</div><div class=""><br class=""></div><div class="">This is purely sugar: if the identifier matches the label of a defaulted to false boolean flag, it is interpreted as if the flag was passed as true. Other than that there is no effect.</div><div class=""><br class=""></div><div class="">I also like your idea as long as we put a limitation like what you proposed: Having it strictly be a UInt8 (or whatever) enum. Still the general resilience issues with enums remain and may get more complicated with this addition.</div><div class=""><br class=""></div><div class=""><br class=""></div></div><div class=""><blockquote type="cite" class=""><div class="">On May 31, 2016, at 3:00 PM, Erica Sadun 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=""><div class=""><br class=""><blockquote type="cite" class="">On May 31, 2016, at 3:20 PM, Brent Royal-Gordon <<a href="mailto:brent@architechies.com" class="">brent@architechies.com</a>> wrote:<br class=""><br class=""><blockquote type="cite" class="">func scaleAndCropImage(<br class=""> image: UIImage,<br class=""> toSize size: CGSize,<br class=""> operation: (.Fit | .Fill) = .Fit<br class=""> ) -> UIImage {<br class=""></blockquote><br class="">As I said the last time this proposal came up, I think this is great right up until the moment you need `operation` to be computed or kept in a variable. Then you need to start copying your anonymous enum type all over your source, and there's no central place to make changes. The same thing is true of tuples, but tuples are easy to structure and destructure from individual values on the spot; anonymous enums aren't really like that.<br class=""></blockquote><br class="">And the obvious answer is you can have up to 255 of these babies for the anonymous enum type, and be able to pass numerical equivalents UInt8 with compile time substitution. That the ad-hoc enumeration is basically a syntactic shorthand for UInt8, with an enforced upper bound compile time check simplifies everything including switch statements.<br class=""><br class="">-- E<br class=""><br class="">_______________________________________________<br class="">swift-evolution mailing list<br class=""><a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a><br class=""><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" class="">https://lists.swift.org/mailman/listinfo/swift-evolution</a><br class=""></div></div></blockquote></div><br class=""></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=""></div></body></html>