Oh, I didn't see that, thanks! I'll write a bug report. > Am 01.11.2016 um 17:52 schrieb Alex Martini <[email protected]>: > > >> On Nov 1, 2016, at 7:23 AM, Toni Suter via swift-evolution >> <[email protected]> wrote: >> >> In Swift 3, I can declare a postfix operator that starts with a ? or a !, >> but as far as I can tell, there's no way to actually use such an operator: >> >> I think it would probably be best to disallow postfix operators that start >> with a question mark or an exclamation mark. >> At the moment it is possible to declare them, but not to use them. That's >> not very user-friendly. > > > This looks like a bug — the documentation and the behavior disagree. The > docs say: > >> Although you can define custom operators that contain a question mark (?), >> they can’t consist of a single question mark character only. Additionally, >> although operators can contain an exclamation mark (!), postfix operators >> cannot begin with either a question mark or an exclamation mark. > > https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/LexicalStructure.html#//apple_ref/doc/uid/TP40014097-CH30-ID418 >
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