[swift-evolution] Control Flow Expressions

[Maxthon Chan]

I believe switch-as-an-expression can be implemented as a dictionary lookup, and if-as-an-expression is the ternary operator ?:

> On Dec 4, 2015, at 19:05, Sergey Shulepov <s.pepyakin at gmail.com> wrote:
> 
> Hello. 
> 
> It would be cool if control flow statements like "switch", "if" can be used as expressions, such as in languages like Scala, Rust and Kotlin,
> so instead of writing:
> 
> var message: String
> if x % 2 == 0 {
> message = "x is even"
> } else {
> message = "x is odd"
> }
> 
> you can write:
> 
> let message: String = if x % 2 == 0 { "x is even" } else { "x is odd" }
> 
> I'm not into any kind of compiler development, and don't know is it feasible to introduce such change at the moment, but at least, I would like to hear why not.
> Thanks!
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