[swift-evolution] Optional precondition after else and #else

[Jordan Rose]

My first thought was that at first glance I'd get this confused with "else if". Obviously that doesn't change semantics in correct code, but it does seem a little subtle.

My second thought was "precondition or assert?" (i.e. "is the check enabled in release builds?") and that convinced me that this wasn't really worth the added complexity. It's a neat idea, but I think the language becomes more complex because of it without sufficient gain.

Jordan

> On Dec 8, 2015, at 5:47, Amir Michail via swift-evolution <swift-evolution at swift.org> wrote:
> 
> For example:
> 
> if a > 0 {
> ….
> } else a < -5 {
> …
> }
> 
> This would be the same as:
> 
> if a > 0 {
> ….
> } else {
>  precondition(a < -5)
> …
> }
> 
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