<div>Nothing, Unit, and other names have been frequently suggested in the past, but changing the name of Void was said to be out of scope even for Swift 3.</div><div><br></div><div><br><div class="gmail_quote"><div>On Mon, Jun 12, 2017 at 13:02 Robert Bennett via swift-evolution &lt;<a href="mailto:swift-evolution@swift.org">swift-evolution@swift.org</a>&gt; wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">The name Unit is used in Foundation for that exact meaning: <a href="https://developer.apple.com/documentation/foundation/unit" target="_blank">https://developer.apple.com/documentation/foundation/unit</a>.<div><br></div><div>I like the name `Nothing` for the empty tuple. func foo(Nothing) {}<br><div><br></div><div><br><div><blockquote type="cite"></blockquote></div></div></div></div><div style="word-wrap:break-word"><div><div><div><blockquote type="cite"><div>On Jun 12, 2017, at 1:57 PM, David Sweeris via swift-evolution &lt;<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>&gt; wrote:</div><br class="m_-2630617452575449582Apple-interchange-newline"></blockquote></div></div></div></div><div style="word-wrap:break-word"><div><div><div><blockquote type="cite"><div><div style="font-family:Helvetica,Arial;font-size:13px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><br class="m_-2630617452575449582Apple-interchange-newline">On Jun 12, 2017, at 10:44, Jérémie Girault via swift-evolution &lt;<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>&gt; wrote:<br><br></div><blockquote type="cite" style="font-family:Helvetica,Arial;font-size:13px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><div><div id="m_-2630617452575449582bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;margin:0px"><p>Void was the empty tuple because arguments were tuples. So no arguments meant empty tuple.</p><p>If we consider the empty tuple to be an argument, then the type for the type of empty tuple should be `Unit`</p><p>Void, however, seem naturally fitted for the absence of argument.</p><p>Should `func foo(Void)` be different from `func foo()`? I don’t think so. But different from `func foo(Unit)` ? Yes !</p></div></div></blockquote><div style="font-family:Helvetica,Arial;font-size:13px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">To me, &quot;Unit&quot; is used like &quot;a unit of length&quot;, &quot;a unit of time&quot;, etc. I&#39;ve not come across it being used as analog for something like the empty tuple.</div><div style="font-family:Helvetica,Arial;font-size:13px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><br></div><div style="font-family:Helvetica,Arial;font-size:13px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">- Dave Sweeris</div></div></blockquote></div></div></div></div><div style="word-wrap:break-word"><div><div><div><blockquote type="cite"><div><span style="font-family:Helvetica,Arial;font-size:13px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;float:none;display:inline!important">_______________________________________________</span><br style="font-family:Helvetica,Arial;font-size:13px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><span style="font-family:Helvetica,Arial;font-size:13px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;float:none;display:inline!important">swift-evolution mailing list</span><br style="font-family:Helvetica,Arial;font-size:13px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><a href="mailto:swift-evolution@swift.org" style="font-family:Helvetica,Arial;font-size:13px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px" target="_blank">swift-evolution@swift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