Re: Can Ada iterate over Nd array?

[BrianG <me@null.email>]

On 04/26/2012 02:09 PM, Jeffrey Carter wrote:
> On 04/26/2012 02:15 AM, gautier.de.montmollin@gmail.com wrote:
>>
>> We could make a poll here: which is the maximum number of array
>> dimensions you ever used ?
>> My answer: probably 5 or 6.
>
> I don't recall ever using more than 3.
>
> I don't think arrays with more than about 30 dimensions are going to be
> possible with current technology: given only 2 index values/dimension,
> that's 2 ** 30 components, or 1 GB if each component is a byte. Much
> more than that and you won't be able to allocate the array. Even in the
> foreseeable future it doesn't look as if a 100-dimension array will be
> possible. 1000 dimensions is right out!
>
If what is desired is an "n-dimensional array" (i.e. n is a parameter of 
some sort - generic or procedure parameter), what are you going to do 
with it, even if you can iterate?  How do you declare such a type?  If 
it's to be used as a library to work on "n-dimensional arrays", how do 
you specify subroutine parameters?  (Except as a raw memory address or 
equivalent.)

-- 
---
BrianG
000
@[Google's email domain]
.com