tuple can write [],but can't read []

[FrankLike via Digitalmars-d]

Hi,erveryone,

type Tuple!(int,int,int,string)  can write[],but can't read[];

module main;
import std.stdio,std.typecons,std.conv;

void main(string[] argv)
{
             alias Tuple!(int,int,string) tuple2;
	alias Tuple!(int,int,string)[10] tupleS2;

	void bbx(tupleS2 x)
	{
		foreach(v;x)
		{
	

		writeln(v);
			foreach(k;v)
			 writeln(k);
		}
	}
	tupleS2 xy2;

	foreach(i,v;xy2)
	

{
		xy2[i] = tuple2(1,-1,"xy2 :"~i.to!string);
	}
	xy2[1][0]=100;  // can write
	bbx(xy2);


	
	for(int i=0;i<3;i++)
	{
	

	writeln(xy2[0][i]); //  can't read
	}
	
    }
-------------------code end----------------------

if use the  'for(int i=0;i<3;i++)' ,then error.

Error: no [] operator overload for type Tuple!(int, int, int,
int, int, int, int, int, int, int, int, string)	 	

Thank you.

Frank