"in" everywhere

[Daniel Gibson]

Andrei Alexandrescu schrieb:
> On 10/7/10 6:54 CDT, atommixz wrote:
>> It would be nice if it were possible to use the "in" expression wherever
>> possible. Now it is only implemented for associative. arrays. (Weird).
>> Examples of how this could be used:
>> - Find string in string
>> - Search for a character in a string
>> - Search for an item in the array, array of characters, array of strings,
>> tuples, enum, structure
>> - what else?
>>
>> In Python done something like this.
>>
>> Here it would be useful to me
>> http://code.google.com/p/atommixz/source/browse/analyze-x86/analyze-x86.py 
>>
>> http://code.google.com/p/atommixz/source/browse/analyze-x86/analyzex86.d
> 
> I'm a bit leary of adopting this feature (it has been discussed). To me 
> "in" implies a fast operation and substring searching isn't quite it.
> 
> One thing that could be done is to allow "in" with literal arrays to 
> their right:
> 
> if (x in ["abcde", "asd"]) { ... }
> 
> The size of the operand is constant, known, and visible.
> 
> 
> Andrei

That feels inconsistent.. to be able to use it with "literal arrays to 
their right" (and what about fixed size arrays?) but not with actual 
arrays and dynamic arrays seems weird.

Cheers,
- Daniel