Super-dee-duper D features

[Andrei Alexandrescu (See Website For Email)]

Bruno Medeiros wrote:
> Andrei Alexandrescu (See Website For Email) wrote:
>> James Dennett wrote:
>>> C++, of course, has std::for_each(e.begin(), e.end(), do_x);
>>> in its library (though that's weaker than it could be because
>>> of lack of support for convenient anonymous functions/lambdas).
>>>
>>> C++0x is very likely to have for(v: e).  It's implemented
>>> in ConceptGCC already. Java already has essentially that,
>>> as does C#.  This really doesn't set D apart (but at least
>>> D isn't falling behind here).
>>
>> BTW, D might soon have simultaneous iteration that will blow away all 
>> conventional languages:
>>
>> foreach (i ; coll1) (j ; coll2)
>> {
>>   ... use i and j ...
>> }
>> continue foreach (i)
>> {
>>   ... coll2 finished; use i ...
>> }
>> continue foreach (j)
>> {
>>   ... coll1 finished; use j ...
>> }
>>
>> Best languages out there are at best ho-hum when it comes about 
>> iterating through simultaneous streams. Most lose their elegant 
>> iteration statement entirely and come with something that looks like 
>> an old hooker early in the morning.
>>
>>
>> Andrei
> 
> Hum. Correct me if I'm wrong, but that proposal would also require 
> adding an iterator concept to iterable types, since the current 
> opApply() mechanism can't suport such simultaneous iteration.

Correct.

Andrei