is this considered inconsistency?

[Steven Schveighoffer]

On 3/21/21 11:55 AM, mw wrote:
> https://run.dlang.io/is/VOGlGN
> 
> void main()
> {
>      import std.stdio: writeln;
>      {
>          // example from "Introduction to Algorithms" Cormen et al., p 146
>          int[] a = [ 4, 1, 3, 2, 16, 9, 10, 14, 8, 7 ];
> 
>          foreach (i;   0 ..  1 ) writeln(i);  // 0
>          foreach (i;   0 ..  0 ) writeln(i);  // no output
>          foreach (i;   0 .. -1 ) writeln(i);  // no output
> 
>          foreach (i; a[0 ..  1]) writeln(i);  // 4
>          foreach (i; a[0 ..  0]) writeln(i);  // no output
>          foreach (i; a[0 .. -1]) writeln(i);  // Range violation
>      }
> }
> 
> Why can't the a[0 .. -1] just return empty range, when end <= start, as 
> in a[0 ..  0]? and also in foreach (i;   0 .. -1 )?
> 
> 

That would be the least useful behavior.

-Steve