Why not support Tuple indexing and slicing with [] syntax?

 (see below for a way to index/slice a tuple)

void main(){

  alias T=Tuple!(int,double);

  pragma(msg,T[0].stringof);//_expand_field_0

  //pragma(msg,T[0..2].stringof); //Error: cannot slice type 'Tuple!(int, double)

  pragma(msg,typeof(T.init[0]).stringof);//int

  pragma(msg,typeof(tuple(T.init[0..$])).stringof);//Tuple!(int,double)

}