commonLength

["Nordlöw" via Digitalmars-d-learn]

On Thursday, 15 January 2015 at 20:21:26 UTC, Nordlöw wrote:
> I would have implemented countUntil() to return
>
>     -length
>
> upon failure instead of
>
>     -1
> .
>
> Then I could have just returned abs of the return value from 
> commonUntil.

I wonder if we could add an extra overload to countUntil in 
Phobos that takes an enum as first argument similar to zip's 
StoppingPolicy. Something like FailCountPolicy.