Feasible Idea?: Range Tester

[John Colvin]

On Thursday, 21 March 2013 at 18:19:00 UTC, Jonathan M Davis 
wrote:
> I could definitely see an argument for adopting the
> policy of having popFront throw RangeError when the range is 
> empty.
>
> - Jonathan M Davis

In release mode, assert expressions are removed. This would not 
be possible for throwing a RangeError, preventing a useful 
optimisation in well tested code.