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.error { color:#AA0000; }</style></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div class="bloop_markdown"><p>Regardless the issue you described with <code>rethrows</code> couldn’t we simply explicitly tell the compiler the closures type which would include the pure arrow?</p>
<p><code>let _: (T) ~> SomeType = { … }</code></p>
<p>That is similar to the behavior we now have with IUOs. (<code>let myView: UIView = self.view</code> inside <code>UIViewController</code> on iOS)</p>
<p>I don’t know if the tilde is heavily used in any other programming patterns and might create confusion here, but from the aesthetic point of view I’d prefer <code>~></code> over <code>=></code>.</p>
<p></p></div><div class="bloop_original_html"><style>body{font-family:Helvetica,Arial;font-size:13px}</style><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div> <br> <div id="bloop_sign_1487348886957587968" class="bloop_sign"><div style="font-family:helvetica,arial;font-size:13px">-- <br>Adrian Zubarev<br>Sent with Airmail</div></div> <br><p class="airmail_on">Am 17. Februar 2017 um 15:37:15, Matthew Johnson via swift-evolution (<a href="mailto:swift-evolution@swift.org">swift-evolution@swift.org</a>) schrieb:</p> <blockquote type="cite" class="clean_bq"><span><div><span style="color: rgb(0, 0, 0); font-family: helvetica; 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-size-adjust: auto; -webkit-text-stroke-width: 0px; display: inline !important; float: none;">Also, what about pure closures that have no need to state a signature because it is inferred? This syntactic sugar is a pretty important aspect of Swift and often times some of our smallest closures will be pure. For example Array’s map should be pure when the closure is pure and many map closures are very small. We don’t want to have to annotate these closures with a signature. </span></div></span></blockquote></div><div class="bloop_markdown"><p></p></div></body></html>