Passing refs with delegates

[Mark J Twain via Digitalmars-d-learn]

On Wednesday, 3 August 2016 at 08:12:00 UTC, Ali Çehreli wrote:
> On 08/02/2016 07:55 PM, Mark J Twain wrote:
>>[...]
>
> I didn't know one could use 'auto ref' in this case but the 
> following simple test works:
>
> auto foo(Func, Args...)(Func callback, auto ref Args args) {
>     return callback(args);
> }
>
> double bar(ref int i, int j, ref int k) {
>     i = 100;
>     k = 102;
>     return 7.5;
> }
>
> void main() {
>     int i;
>     int k;
>     auto a = foo(&bar, i, 2, k);
>     assert(i == 100);
>     assert(k == 102);
>     assert(a == 7.5);
> }
>
> Ali

Interesting, it might just do! Thanks.