Is all this Invarient **** er... stuff, premature optimisation?

[Janice Caron]

2008/4/28 Simen Kjaeraas <simen.kjaras at gmail.com>:
>  int main(string[] args)
>  {
>   char[] a = cast(char[])args[0];
>   a[2..5] = "XXX";
>   writefln(a);
>   return 0;
>  }
>  This compiles and runs, and seems to do what you describe. Sure, there's a
>  cast there, but it's not all that bad, is it?

Yes, it's extremely bad. Casting away invariant is UNDEFINED BEHAVIOR,
and should never be done.

You should never need an explicit cast just to handle text!