[swift-evolution] Control Flow Expressions

Sergey Shulepov s.pepyakin at gmail.com
Fri Dec 4 05:05:44 CST 2015


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.

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