Destructured Tuple Assignment

[via Digitalmars-d-learn]

I recall having seen an example of using some D magic (via mixin 
perhaps?) to realize tuple destructuring in assignments like

    magic(first, _, second) = expression.findSplit(separator);
somewhere. But I can't seem to find it right now.

References anyone?

BTW :I'm aware of Kenjis PR, which I am very much longing for ;)