faster splitter

[Andrei Alexandrescu via Digitalmars-d]

On 5/23/16 9:44 AM, Jack Stouffer wrote:
> On Monday, 23 May 2016 at 13:20:55 UTC, Andrei Alexandrescu wrote:
>> Most uses are forward, so perhaps it's best to eliminate the
>> bidirectional bookkeeping if it adds overhead, and confine those to a
>> separate function e.g. splitterBidirectional. There is precedent for
>> that in Phobos. -- Andrei
>
> I don't see the value add that things like filterBidirectional give when
> the back and popBack functions can be static if-ed in or out the normal
> filter.

What would be the condition tested in the static if? Recall that 
sometimes you do want a forward range even when you could define a 
bidirectional range. -- Andrei