if(arr) now a warning

[via Digitalmars-d]

On Friday, 10 April 2015 at 10:14:43 UTC, Martin Nowak wrote:
> if (arr) -> if (!arr.empty)
>
> It's much clearer and also what you need to write when you work 
> with ranges.

Maybe rename it "opEmpty" then.

Try to keep language protocols and library conventions separate.