sortUniq

[zeljkog via Digitalmars-d]

On 24.01.15 18:02, Andrei Alexandrescu wrote:
> On 1/24/15 7:17 AM, zeljkog wrote:
>>
>> private struct FilterResult(alias predicate, Range)
>> {
>>      static if (is(predicate == struct))
>>          predicate pred;
>>      else
>>          alias pred = predicate;
>> ...
> 
> The problem is here - the creation of an empty object is unlikely to be 
> of use to the caller. We should, however, support the case when the 
> caller passes a stateful predicate into the call. -- Andrei

I think empty object could be useful, but perhaps there is better :)

Until now I concluded:
1. Resulting range must be output range. Right?
   I don't know is it considerable problem?
2. unaryFun can pass down struct (with opCall check?)