<div dir="ltr"><div class="gmail_default" style="font-family:georgia,serif">I do think there is something wrong here.</div><div class="gmail_default" style="font-family:georgia,serif"><br></div><div class="gmail_default" style="font-family:georgia,serif">// Xcode 7.3.1, Swift 2.2</div><div class="gmail_default" style="font-family:georgia,serif"><br></div><div class="gmail_default"><div class="gmail_default"><font face="georgia, serif">let t1: Int? = 2 // struct Int?</font></div><div class="gmail_default"><font face="georgia, serif">let y = t1 ?? "abcdf" // error</font></div><div class="gmail_default"><font face="georgia, serif">let x = t1 ?? NSFont(name: "", size: 0) // x: NSObject?</font></div><div class="gmail_default"><font face="georgia, serif"><br></font></div><div class="gmail_default"><font face="georgia, serif">for x, how could it be NSObject?, as t1 is a struct?</font></div><div class="gmail_default"><br></div><div class="gmail_default"><font face="georgia, serif">zhaoxin</font></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Apr 18, 2016 at 6:59 PM, Marco Feltmann via swift-users <span dir="ltr"><<a href="mailto:swift-users@swift.org" target="_blank">swift-users@swift.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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Am 18.04.2016 um 11:51 schrieb tuuranton--- via swift-users:<br>
<blockquote type="cite">
<pre>Why does this compile?
let t1: Int? = 2print(t1 ?? "asdf")
</pre>
</blockquote></span>
Well, I guess you try to re-typedef (??) a language construct.<br>
According to NSHipster ?? is the languages <code>nil</code>
coalescing operator.<br>
<br>
So it simply compiles because t1 isn't nil.<br>
<br>
Further reference:<br>
<a href="https://en.wikipedia.org/wiki/Null_coalescing_operator#Swift" target="_blank">https://en.wikipedia.org/wiki/Null_coalescing_operator#Swift</a><br>
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