[swift-evolution] Proposal to change Logical NOT Operator from exclamation mark ( ! ) to something else

[Derrick Ho]

There is no need to change it

Since the context basically disambiguates the meaning of !

The next best thing is to compare it to false

(val == false) // same as !val
On Wed, Feb 15, 2017 at 3:02 PM David Waite via swift-evolution <
swift-evolution at swift.org> wrote:

> If someone came with a nice syntax I’d be for this. I can’t imagine what
> that would be.
>
> I doubt there is an alternate prefix or postfix operator that would pass
> muster, due to ‘!’ already meaning the appropriate thing in so many
> languages, and swift only supporting symbolic operators.
>
> I can’t think of a method on boolean which would read properly either, e.g.
>
> if isValid.not() {…}
>
> The closest I could think to a decent bike shed color would be a global
> function:
>
> if not(isValid) {…}
>
> -DW
>
> On Feb 15, 2017, at 11:10 AM, Robert Widmann via swift-evolution <
> swift-evolution at swift.org> wrote:
>
> So you've identified the problem, but what do you propose as a solution
> here?
>
> It should be noted that a (non-stdlib) language-level answer to this
> question has already been discussed and rejected (
> https://lists.swift.org/pipermail/swift-evolution/2015-December/000032.html
> ).
>
> ~Robert Widmann
>
> 2017/02/15 9:02、Sadiq via swift-evolution <swift-evolution at swift.org>
> のメッセージ:
>
> Hello,
>
> I would like to suggest to change Logical NOT Operator from ! to something
> else.
> It will increase the readability of the code and will avoid any confusion
> with the symbol used for force unwrapping of optional values.
> It would be easier for new programmers to learn Swift as the first
> language.
> I don't understand the rational behind using the same operator for two
> different purposes.
>
> Thanks and Regards,
> Mohammad Sadiq
>
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