<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 22 Feb 2017, at 07:05, Jacob Bandes-Storch wrote:</div><br class="Apple-interchange-newline"><div class=""><div style="font-family: Helvetica; font-size: 12px; 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;" class=""><b class="">Compound name syntax</b> —<span class="Apple-converted-space"> </span><font face="monospace, monospace" class="">foo(_:)</font>,<span class="Apple-converted-space"> </span><font face="monospace, monospace" class="">foo(bar:)</font>,<span class="Apple-converted-space"> </span><font face="monospace, monospace" class="">foo(bar:baz:)</font><span class="Apple-converted-space"> </span>— is used to disambiguate references to functions. (You might've used it inside a #selector expression.) But there's currently no compound name for a function with no arguments.</div><div style="font-family: Helvetica; font-size: 12px; 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;" class=""><br class=""></div><div style="font-family: Helvetica; font-size: 12px; 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;" class=""><div class=""><font face="monospace, monospace" class=""> func foo() {} // no compound syntax for this one :(</font></div><div class=""><font face="monospace, monospace" class=""> func foo(_ bar: Int) {} // foo(_:)</font></div><div class=""><font face="monospace, monospace" class=""> func foo(bar: Int) {} // foo(bar:)</font></div><div class=""><font face="monospace, monospace" class=""> func foo(bar: String, baz: Double) {} // foo(bar:baz:)</font></div></div><div style="font-family: Helvetica; font-size: 12px; 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;" class=""><br class=""></div><div style="font-family: Helvetica; font-size: 12px; 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;" class="">Given these four functions, only the first one has no compound name syntax. And the simple reference "<font face="monospace, monospace" class="">let myfn = foo</font>" is ambiguous because it could refer to any of the four. A workaround is to specify a contextual type, e.g. "<font face="monospace, monospace" class="">let myfn = foo as () -> Void</font>".</div><div style="font-family: Helvetica; font-size: 12px; 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;" class=""><br class=""></div><div style="font-family: Helvetica; font-size: 12px; 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;" class="">I filed <a href="https://bugs.swift.org/browse/SR-3550" class="">SR-3550</a> for this a while ago, and there was some discussion in JIRA about it. I'd like to continue exploring solutions here and then write up a formal proposal.</div></div></blockquote></div><br class=""><div class=""><div class="">Would the following be an option?</div><div class=""><br class=""></div><div class=""><font face="Menlo" class=""><span class="Apple-tab-span" style="white-space: pre;"> </span> foo() // Function call expression.</font></div><div class=""><font face="Menlo" class=""><span class="Apple-tab-span" style="white-space:pre"> </span>`foo()` // Function reference (using backticks).</font></div><div class=""><br class=""></div><div class="">-- Ben</div></div><div class=""><br class=""></div></body></html>