"in" everywhere

[Andrei Alexandrescu]

On 10/7/10 9:59 CDT, Daniel Gibson wrote:
> 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.

It's not. It's all about constant size in the size of the input vs. 
arbitrary size. Makes perfect sense to me.

Andrei