How to override opCmp when two different sorts are needed?

[Regan Heath]

C. Dunn wrote:
> Jarrett Billingsley Wrote:
>> Write your own sort routine which takes a given predicate.  :\
>> 
>> Tango provides such a routine in tango.core.Array; phobos provides
>> no such analogue.  With phobos, either write your own routine, or
>> use std.c.stdlib.qsort.  I'll let you decide which is more elegant.
>> 
> 
> It's not just a matter of elegance.  C++ std::sort() is way, way
> faster than qsort in cstdlib because the comparison function gets
> inlined.  Sorting is one place where inlining is critical.

I believe the intention for D is that the optimizer will automagically 
inline everything it can.

Regan