[swift-evolution] Please remove obscure "!" requirements for implicitly unwrapped optionals

[Per Melin]

On Fri, Dec 4, 2015 at 1:03 AM, Amir Michail <a.michail at me.com> wrote:

>
> I really don’t like having to put the ! suffix in boolean contexts:
>

To be explicit:

    let a: Bool! = false

    if a == false { }  // Works as expected

    if !a { }  // Works as expected

    if a { }   // "error: optional type 'Bool!' cannot be used as a
boolean; test for '!= nil' instead"

Xcode "fixes" the last line like this:

    if (a != nil) { }



> "if displayFlag! { ... }" instead of "if displayFlag { … }" etc.
>
> If you also want a way to compare with nil, then maybe have this for
> implicitly unwrapped optionals:
>
> if displayFlag? == nil { … }
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