Proposal : mnemonic for start index for slices

[sigod via Digitalmars-d]

On Saturday, 8 August 2015 at 13:42:03 UTC, John Colvin wrote:
> That would be neat, but the thing is you can already do this:
>
> auto sub = arr[idx + 123 * 10 .. $][0 .. 1];
>
> The only argument that might hold weight is that calculating 
> opDollar and doing two index/slice operations might be 
> relatively expensive for some user-defined type.

Shouldn't it be always rewritten by compiler regardless 
underlying type?

     auto sub = arr[idx + 123 * 10 .. $][0 .. 1];

->

     auto index = idx + 123 * 10;
     auto sub = arr[index .. index + 1];

I mean, does it make sense to have unequal results for this 2 
expressions?