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<div name="messageBodySection">We were discussing the topic yesterday with others and some suggested adding a pure keyword, for improved readability, just before the function declaration:<br />
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Ex:<br />
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pure func(a:Some) -> Else {}<br />
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On Feb 17, 2017, 11:51 AM -0500, Matthew Johnson via swift-evolution <swift-evolution@swift.org>, wrote:<br />
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<div class="">On Feb 17, 2017, at 10:46 AM, David Sweeris via swift-evolution <<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>> wrote:</div>
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On Feb 17, 2017, at 08:21, Adrian Zubarev via swift-evolution <<a href="mailto:swift-evolution@swift.org" style="color: rgb(65, 131, 196); background-color: inherit; text-decoration: none;" class="">swift-evolution@swift.org</a>> wrote:<br class="" />
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<p style="margin: 15px 0px; -webkit-margin-before: 0px;" class="">I haven’t yet read all the feedback in this topic but I’d like to throw some bikeshedding of mine into the room. :)</p>
<p style="margin: 15px 0px;" class="">How about this?</p>
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<li style="margin: 15px 0px; -webkit-margin-before: 0px;" class="">Version 1:<span class="Apple-converted-space"> </span><code style="font-family: Menlo, Consolas, 'Liberation Mono', Courier, monospace; font-size: 10pt; border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; background-color: rgb(248, 248, 248); color: inherit; border: 1px solid rgb(234, 234, 234); margin: 0px 2px; padding: 0px 5px; word-break: normal; word-wrap: normal; -webkit-margin-before: 0px;" class="">func(pure) …</code></li>
<li style="margin: 15px 0px;" class="">Version 2:<span class="Apple-converted-space"> </span><code style="font-family: Menlo, Consolas, 'Liberation Mono', Courier, monospace; font-size: 10pt; border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; background-color: rgb(248, 248, 248); color: inherit; border: 1px solid rgb(234, 234, 234); margin: 0px 2px; padding: 0px 5px; word-break: normal; word-wrap: normal; -webkit-margin-before: 0px;" class="">func label(…) ~> ReturnType</code></li>
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<span style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(254, 254, 254); float: none; display: inline !important;" class="">Version 2 is going to upset those who use "~>" as an operator.</span>
<div style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(254, 254, 254);" class=""><br class="" /></div>
<div style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(254, 254, 254);" class="">As the # of possible attributes grows, having an obvious grouping mechanism for them, like version 1, might be worthwhile simply to help make the list clearer. What about allowing "@(list, of, attributes)" instead of "<span style="background-color: rgba(255, 255, 255, 0);" class="">@list, @of, @attributes”?</span></div>
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<div>That would be a little bit awkward for attributes that are parameterized.  And if we did do this we should allow the parens to be omitted when there is only one attribute.</div>
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<div style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(254, 254, 254);" class=""><span style="background-color: rgba(255, 255, 255, 0);" class=""><br class="" /></span></div>
<div style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(254, 254, 254);" class=""><span style="background-color: rgba(255, 255, 255, 0);" class="">- Dave Sweeris</span></div>
<span style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(254, 254, 254); float: none; display: inline !important;" class="">_______________________________________________</span><br style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(254, 254, 254);" class="" />
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