foreach (x; a .. b) and foreach_reverse (x; a .. b) should be disallowed

Andrei Alexandrescu SeeWebsiteForEmail at
Sun May 17 19:14:50 PDT 2009

Robert Fraser wrote:
> Jason House wrote:
>> Andrei Alexandrescu Wrote:
>>> Consider:
>>>      foreach (x; 1.0 .. 4.1) writeln(x);
>>>      foreach_reverse (x; 1.0 .. 4.1) writeln(x);
>>> This sucks. foreach with interval for floating-point types should be 
>>> disallowed.
>>> Andrei
>> I agree that makes little sense.
>> I'm curious, why the sudden pruning of features? Can you please 
>> consider removing SFINAE? I'd also love to see is expressions go the 
>> way of the dinosaur. I don't know what their replacement should look 
>> like, but there _has_ to be a better and less error prone syntax!
> I agree about SFINAE, but what's so bad about is()? If it does get 
> removed, I hope whatever replaces it can do all the weird things is can 
> (e.x. is(typeof({}())))

If-clauses in template definitions should do everything SFINAE does, 


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