<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Feb 23, 2017, at 12:52 PM, Anton Zhilin via swift-evolution &lt;<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>&gt; wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="markdown-here-wrapper" style=""><p style="margin:0px 0px 1.2em!important" class="">+1 to <code style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);background-color:rgb(248,248,248);border-radius:3px;display:inline" class="">foo(:)</code> version.<br class="">I can easily see placeholder arguments as a sugary syntax for closures:</p></div></div></div></blockquote><div>This shorthand has been explicitly rejected several times in favor of the $ argument shorthand.</div><br class=""><blockquote type="cite" class=""><div class=""><div dir="ltr" class=""><div class="markdown-here-wrapper" style="">
<pre style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;font-size:1em;line-height:1.2em;margin:1.2em 0px" class=""><code style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);background-color:rgb(248,248,248);border-radius:3px;display:inline;white-space:pre;overflow:auto;border-radius:3px;border:1px solid rgb(204,204,204);padding:0.5em 0.7em;display:block!important" class="">func bar(_ x: Int, _ y: Double)
let f = bar(_, 42)   // the same as:
let f = { (x: Int) in bar(x, 42) }
</code></pre><p style="margin:0px 0px 1.2em!important" class="">Now, let’s view a single-parameter version:</p>
<pre style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;font-size:1em;line-height:1.2em;margin:1.2em 0px" class=""><code style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);background-color:rgb(248,248,248);border-radius:3px;display:inline;white-space:pre;overflow:auto;border-radius:3px;border:1px solid rgb(204,204,204);padding:0.5em 0.7em;display:block!important" class="">func foo(_ x: Int)
let f = foo(_)   // the same as:
let f = { (x: Int) in foo(x) }
</code></pre><div title="MDH:KzEgdG8gYGZvbyg6KWAgdmVyc2lvbi48ZGl2PkkgY2FuIGVhc2lseSBzZWUgcGxhY2Vob2xkZXIg
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ZiA9IHsgKHg6IEludCkgaW4gZm9vKHgpIH08L2Rpdj48ZGl2PmBgYDwvZGl2Pg==" style="height:0;width:0;max-height:0;max-width:0;overflow:hidden;font-size:0em;padding:0;margin:0" class="">​</div></div></div>
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