<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">Well I only used the previously mentioned names, in my codebase I use `isFalse` for that situation which is better then `== false` in my opinion.</div> <br> <div id="bloop_sign_1515870428926558976" class="bloop_sign"></div> <br><p class="airmail_on">Am 13. Januar 2018 um 20:06:21, Karl Wagner (<a href="mailto:razielim@gmail.com">razielim@gmail.com</a>) schrieb:</p> <blockquote type="cite" class="clean_bq"><span><div><div></div><div>
<br>
<br>> On 12. Jan 2018, at 20:54, Alejandro Martinez via swift-evolution <swift-evolution@swift.org> wrote:
<br>>
<br>> I wouldn't go as far as to ask to fade out ! but in all my code I end
<br>> up doing == false just for readability. That ! knows who to hide
<br>> himself too well :P
<br>>
<br>
<br>Yeah so do I. ! is a very narrow character and totally changes the meaning of the logic.
<br>
<br>That said, I can’t come up with a clearer name than “== false”. inverted() isn’t helpful. toggle() on a mutable Bool is good, though.
<br>
<br>- Karl
<br>
<br>> On Fri, Jan 12, 2018 at 10:13 AM, Adrian Zubarev via swift-evolution
<br>> <swift-evolution@swift.org> wrote:
<br>>> I’m not sure if this would be considered or not, but I would like if the
<br>>> negation operator `!` would fade out.
<br>>>
<br>>> If this is ever going to a review then I’d suggest that we add a pair of
<br>>> functions, one mutating and the other non-mutating.
<br>>>
<br>>> extension Bool {
<br>>> mutating func invert() {
<br>>> self = !self
<br>>> }
<br>>>
<br>>> func inverted() {
<br>>> return !self
<br>>> }
<br>>> }
<br>>>
<br>>> I’d rather use `inverted` instead of `!` because of the readability this
<br>>> function provides.
<br>>>
<br>>> if !items.contains(item) { ... }
<br>>>
<br>>> if items.contains(item).inverted() { ... }
<br>>>
<br>>> ——
<br>>>
<br>>> I personally have some other extensions like:
<br>>>
<br>>> extension Bool {
<br>>> @discardableResult
<br>>> func whenTrue<T>(execute closure: () throws -> T) rethrows -> T? {
<br>>> if self { return try closure() }
<br>>> return nil
<br>>> }
<br>>>
<br>>> @discardableResult
<br>>> func whenFalse<T>(execute closure: () throws -> T) rethrows -> T? {
<br>>> if !self { return try closure() }
<br>>> return nil
<br>>> }
<br>>> }
<br>>>
<br>>> But this is more a personal preference.
<br>>>
<br>>> ——
<br>>>
<br>>> That said, if the community is fine with the `invert/inverted` pair then I’d
<br>>> say go for it ;)
<br>>>
<br>>> Am 12. Januar 2018 um 09:14:22, Nate Cook via swift-evolution
<br>>> (swift-evolution@swift.org) schrieb:
<br>>>
<br>>>
<br>>> On Jan 12, 2018, at 12:15 AM, Chris Eidhof via swift-evolution
<br>>> <swift-evolution@swift.org> wrote:
<br>>>
<br>>> Hey SE!
<br>>>
<br>>> When we have a bunch of nested structs:
<br>>>
<br>>> struct Sample {
<br>>> var bar: Bar
<br>>> }
<br>>>
<br>>> struct Bar {
<br>>> var show: Bool
<br>>> }
<br>>>
<br>>> var foo = Sample(bar: Bar(show: false))
<br>>>
<br>>> It can be repetitive to toggle a deeply nested boolean:
<br>>>
<br>>> foo.bar.show = !foo.bar.show // duplication
<br>>>
<br>>> I sometimes add a `toggle` extension on `Bool`
<br>>>
<br>>> extension Bool {
<br>>> mutating func toggle() {
<br>>> self = !self
<br>>> }
<br>>> }
<br>>>
<br>>> This allows you to write the same code without duplication, and makes the
<br>>> intent clearer:
<br>>>
<br>>> foo.bar.show.toggle()
<br>>>
<br>>>
<br>>> I like it!
<br>>>
<br>>> In other languages, I don't think the `toggle` would make as much sense, but
<br>>> the mutable self makes this very useful.
<br>>>
<br>>> After I posted it on Twitter, it turns out I'm not the only one:
<br>>> https://twitter.com/PublicExtension/status/730434956376346624
<br>>>
<br>>> I would have gone straight to a proposal, but I think we can do some
<br>>> bikeshedding about the name of `toggle`?
<br>>>
<br>>>
<br>>> Another verb that could work is `invert`.
<br>>>
<br>>> The `!` operator that does this is the negation operator, but I think
<br>>> `negate` could sound to some like "make this false" rather than toggling.
<br>>>
<br>>> Nate
<br>>> _______________________________________________
<br>>> swift-evolution mailing list
<br>>> swift-evolution@swift.org
<br>>> https://lists.swift.org/mailman/listinfo/swift-evolution
<br>>>
<br>>>
<br>>> _______________________________________________
<br>>> swift-evolution mailing list
<br>>> swift-evolution@swift.org
<br>>> https://lists.swift.org/mailman/listinfo/swift-evolution
<br>>>
<br>>
<br>>
<br>>
<br>> --
<br>> Alejandro Martinez
<br>> http://alejandromp.com
<br>> _______________________________________________
<br>> swift-evolution mailing list
<br>> swift-evolution@swift.org
<br>> https://lists.swift.org/mailman/listinfo/swift-evolution
<br>
<br></div></div></span></blockquote></body></html>