pop & popFront combined

["Nordlöw" via Digitalmars-d-learn]

On Saturday, 20 September 2014 at 19:23:46 UTC, Jakob Ovrum wrote:
> Sometimes after popping, the previous `front` is no longer 
> valid, such as in the case of a buffer being reused. We should

This seems like a error-prone design to me.

I guess performance is the motivation right?

Maybe a future data-flow analysis á lá Rust could come to the 
rescue here ;)