std.algorithm can not be used inside pure functions?

[Adam D. Ruppe via Digitalmars-d-learn]

On Saturday, 6 May 2017 at 14:14:41 UTC, Szabo Bogdan wrote:
> oh yes, I get it... begin and end are `SysTime`.. there is any 
> workaround for this?

Don't use pure?

I don't think any of the SysTime conversion methods are pure 
since all of them call C functions which pull from the time 
zone... even if you subclassed the timezone to be pure, SysTime 
wouldn't pick that up since it uses the impure interface.

I guess you could use a casted wrapper to hack in pure too, but 
I'd say just take the keyword off.