foreach multiple loop sugar

[cym13 via Digitalmars-d-learn]

On Tuesday, 18 August 2015 at 15:51:55 UTC, ixid wrote:
> Though sugar seems to be somewhat looked down upon I thought 
> I'd suggest this- having seen the cartesianProduct function 
> from std.algorithm in another thread I thought it would be an 
> excellent piece of sugar in the language. It's not an earth 
> shattering change but it makes something very common more 
> elegant and reduces indentation significantly for multiple 
> nested loops. Braces make nested loops very messy and any 
> significant quantity of code in the loop body benefits from not 
> being in a messy nesting.
>
> ...

What would you do with associative arrays?

void main() {
     auto aa = [1:1, 2:2];
     foreach (a, b ; aa, 1..10)
         foo(a, b);
}