if(arr) now a warning

[ketmar via Digitalmars-d]

On Fri, 10 Apr 2015 20:30:16 +1000, Daniel Murphy wrote:

> "Martin Nowak"  wrote in message
> news:lgjobvhvilvdymfatoje at forum.dlang.org...
> 
>> I've been thinking about moving std.array.empty to object. Then that
>> could more easily become the replacement idiom.
>>
>> if (arr) -> if (!arr.empty)
>>
>> It's much clearer and also what you need to write when you work with
>> ranges.
> 
> if (arr.length) is just as clear, and the same thing.
> 
> I use arr.length when I'm working with arrays, and .empty when working
> with general ranges.  I generally prefer not to mix the two.

isn't it a compiler task to track types? ranges can be empty, arrays can 
be empty. i can't see why one should remember that their emptiness if 
somehow different.
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