What is a sink delegate?

[Joel via Digitalmars-d-learn]

Thanks thedeemon.

On Friday, 10 October 2014 at 04:42:04 UTC, thedeemon wrote:
> On Friday, 10 October 2014 at 03:06:33 UTC, Joel wrote:
>
>> How do you use that toString? Maybe an example?
>
> void main() {
>  	Try t = Try("Joel", 35);
> 	t.toString(s => writeln(s));
> }