range.save

[Freddy via Digitalmars-d]

On Thursday, 19 November 2015 at 21:30:23 UTC, Freddy wrote:
> ...
Another problem I noticed with ranges is that all functionality 
is unionized. Ranges are expected to be able to 
popFront,Index,popBack, randomly possibly forcing ranges to carry 
unneeded buffers if indexing or popBack in never used.

On possible solution is to have .retroRange and .indexRange On 
forward/input ranges.