use variant as associative array

[GG]

I tried std.boxer,
        Box[char[]][int] bb;
	bb[0]["Month"] = box("Jan");
	bb[0]["Profit"] = box(800);
	bb[1]["Month"] = box("Jan");
	bb[1]["Profit"] = box(200);
	
        /*section work*/
	writefln("%s",bb[0]["Month"]);
	writefln("%d",bb[0]["Profit"]);
	writefln("%s",bb[1]["Month"]);
	writefln("%d",bb[1]["Profit"]);
        /*end section*/

	for(int i=0;i<bb.length;i++) // can't do .length with box, so can't pass on array :-(
	{
		writefln("%s",bb[i]["Month"]);
		writefln("%d",bb[i]["Profit"]);
	}

But I found this : http://www.digitalmars.com/d/archives/D/gnu/Issue_1968_New_boxer.d_does_not_work_3168.html

They say to use std.variant for new code...
So with std.boxer, we can save and get data by indice directly but no property .length

With std.variant, we can save data but can't access to data (ex: aa[i]["Month"]) // Range violation

Thanks !