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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>+1 I had a slightly different implementation.</p>
<p><a href="https://gist.github.com/DevAndArtist/dad641ee833e60b02fd1db2dbb488c6a">https://gist.github.com/DevAndArtist/dad641ee833e60b02fd1db2dbb488c6a</a></p>
<pre><code>//
// UnwrapOrTrap.swift
//
infix operator ?! : NilCoalescingPrecedence
/// Performs a nil-coalescing operation, returning the wrapped value of an
/// `Optional` instance or uses the rhs function to stop the program.
///
/// - Parameters:
/// - optional: An optional value.
/// - noreturn: A function to stop the programm.
func ?!<T>(optional: T?, noreturn: @autoclosure () -> Never) -> T {
switch optional {
case .some(let value):
return value
case .none:
noreturn()
}
}
</code></pre>
<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_1498584478928029184" 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 27. Juni 2017 um 19:25:15, Erica Sadun 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 style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div></div><div>
<title></title>
<div class="">Using an operator to provide feedback on the context
of a failed unwrap has become a commonly implemented approach in
the Swift developer Community. What are your thoughts about
adopting this widely-used operator into the standard library?</div>
<div class=""><br class=""></div>
<div class=""><font face="Menlo" class="">guard !lastItem.isEmpty
else { return }</font></div>
<div class=""><font face="Menlo" class="">let lastItem = array.last
!! "Array must be non-empty"</font></div>
<div class=""><br class=""></div>
<div class="">Details here: <a href="https://gist.github.com/erica/423e4b1c63b95c4c90338cdff4939a9b" class="">https://gist.github.com/erica/423e4b1c63b95c4c90338cdff4939a9b</a></div>
<div class=""><br class=""></div>
<div class="">Thank you for your thoughtful feedback, -- E</div>
<div class=""><br class=""></div>
_______________________________________________<br>swift-evolution mailing list<br>swift-evolution@swift.org<br>https://lists.swift.org/mailman/listinfo/swift-evolution<br></div></div></span></blockquote></div><div class="bloop_markdown"><p></p></div></body></html>