[OT] Some neat ideas from the Kotlin language

[rsw0x via Digitalmars-d]

On Saturday, 20 February 2016 at 09:40:40 UTC, Tobias Müller 
wrote:
> Yuxuan Shui <yshuiv7 at gmail.com> wrote:
>>         [...]
>
> In Rust that would be:
>
> let var : Option<i32> = ...;
> if let Some(var) = var {
>     // You can use var here
> }
>
> It works for every enum (= tagged union), not just Option<T>
>
> Swift also has "if let".
>
> It's not much more verbose but more explicit.
> Changing the type of a variable based on static analysis is 
> just advanced
> obfuscation. It hurts readability and the gain is questionable. 
> At least it
> only works for nullable types.
>
> Tobi

D has this too, but only for nullable types afaik.

if(byte* ptr = someFunc()){
//...
}