foreach change for multi-dimensional data

[ixid via Digitalmars-d-learn]

This is an idle thought hence putting it on the Learn-level 
forum. An idea struck me for foreach to make working with more 
complicated data types or heavily nested data easier.

        uint[][] a = [[1,2,3],[4,5,6]];

        foreach(uint[] b; a)
                b.writeln;
        

At present you can specify the type of 'b' in this example. If 
you want to iterate over each uint you have to write (and 
obviously you can omit the type for 'b' and 'c'):

        
        foreach(uint[] b; a)
                foreach(uint c; b)
                        c.writeln;
        
It would be nice if you could do something like this:

        foreach(uint c; a)
                c.writeln;

Where it will take the ForeachType of 'a' until it finds a match 
to the type of 'c' and iterate over all that data. It would make 
it much less messy to apply a function that takes uint to all the 
data rather than having to nest loops or map maps.