Iterators and Ranges: Comparing C++ to D to Rust

[sighoya]

On Tuesday, 15 June 2021 at 10:04:03 UTC, Ola Fosheim Grøstad 
wrote:

> So basically:
>
> ```
>     coroutine(){
>        int n = 0;
>        while(true){
>           n++;
>           yield n;
>           if (n > 100) {
>             yield 0;
>           }
>        }
>     }
>
> ```
>
>
> can be distilled into something like this (unoptimized):
>
>
> ```
>     struct {
>         int n;
>         int result;
>         delegate nextstate = state1;
>         state1() {
>            n++;
>            result = n;
>            nextstate = state2;
>         }
>         state2() {
>            if (n > 100) {
>                result = 0;
>                nextstate = state1;
>            }
>            else state1();
>         }
>     }
>
> ```

Reminds me a bit on CPS: https://github.com/zevv/cpsdoc