Where is your problem here? It’s simple and easy ;)
extension Integer {
init(_ boolean: Bool) {
self = boolean ? 1 : 0
}
}
Int(10 > 4)
UInt32(1 <= 2)
--
Adrian Zubarev
Sent with Airmail
Am 22. November 2016 um 00:54:47, Rick Mann via swift-users
(swift-users@swift.org) schrieb:
> On Nov 21, 2016, at 15:09 , Marco S Hyman <m...@snafu.org> wrote:
>
>> Except it does, because if I write
>>
>> let a = 2
>
>> a is of type Int (at least, according to Xcode's code completion).
>
> and if you write
>
> let b = 2 + 0.5
>
> 2 is treated as a double. The type of the literal “2” varies with context. Do
> you also find that inconsistent and confusing?
Nope. I can see how the promotion works. Also, Xcode would tell me b is a
Double.
>
>> But this gives inconsistent results:
>>
>> let t = true
>>
>> let a = Int(true)
>> let b = Int(t) // Error
>>
>> I find this to be very inconsistent and confusing.
>
> t is a Bool and there is no automatic conversion from Bool to Int.
>
> true is not a Bool. It may be treated as a Bool depending upon context. In
> the line `let t = true` it is treated as a Bool. In `let a = Int(true)` it is
> treated as an NSNumber (assuming you import foundation).
That may be what's happening, but it's still confusing and unintuitive. That
something is lost in the transitivity of going through a variable, aside from
"literalness", is confusing.
And really, it would be nice if the language provided a fast way of getting an
number "1" out of a Bool variable true (and 0 out of false). But that
conversation is a bigger can of worms than I care to open right now.
--
Rick Mann
rm...@latencyzero.com
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