Safer casts

[Don]

Sean Kelly wrote:
> Janice Caron wrote:
>> 2008/5/13 Sean Kelly <sean at invisibleduck.org>:
>>>  It depends what you mean by "powerful."  Passing a comparator as a 
>>> template parameter,
>>>  as with sort!(), means that the choice of comparator must be made at 
>>> compile-time rather
>>>  than run-time.  This may be problematic in some instances.
>>
>> I think you meant to say, the choice of comparator /may/ be made at
>> compile-time. Not must.
>>
>>     sort!(compare)(array); // compile time
>>     sort(compare, array); // run time
> 
> I meant the way sort works in std.algorithm.  But it appears that my 
> answer was D 1.0-specific.  I had no idea D 2.0 added the option to 
> instantiate a template on an alias to a local variable.

It should work in D1.0, as well. It was added not long before D1.00 came 
out.