Can we get rid of opApply?
Steven Schveighoffer
schveiguy at yahoo.com
Tue Jan 20 09:23:44 PST 2009
"Andrei Alexandrescu" wrote
> Steven Schveighoffer wrote:
>> "dsimcha" wrote
>>> foreach(char[] s; array) vs.
>>> foreach(char[] s; IntegersAsString(array))
>>>
>>> I think a lot of stuff is going to need some kind of extra struct like
>>> this to
>>> make it work. When this is the case, it needs to be possible to have a
>>> default
>>> iteration method that "just works." The opDot overload, I guess, could
>>> do this,
>>> but it's a rather blunt tool, since then you can't use opDot for other
>>> stuff and
>>> you'd have to forward _everything_ to the opDot object.
>>
>> opRange doesn't help here. array is a (non-extendable) primitive, so the
>> compiler needs to be told how to convert integers to strings.
>>
>> Even opApply wouldn't get you here.
>>
>> I actually think something cool would be a toRange struct:
>>
>> foreach(s; toRange!(string)(array))
>>
>> Which would be like the to! template.
>>
>> -Steve
>
> With the new std.algorithm:
>
> foreach (s; map!(to!string)(array)) { ... }
That's cool :D
-Steve
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