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

[Andrea Fontana via Digitalmars-d]

On Tuesday, 29 April 2014 at 09:23:03 UTC, FrankLike wrote:
> Hi,erveryone,
> [...]
> 	xy2[1][0]=100;  // can write
> [...]
> 	writeln(xy2[0][i]); //  can't read
> [...]

If I'm right, index should be a compile-time value.