Re: Multiple iterators for a type

[Lucretia <laguest9000@googlemail.com>]

On Saturday, 26 May 2018 07:59:59 UTC+1, Dmitry A. Kazakov  wrote:
> On 2018-05-26 05:57, Luke A. Guest wrote:
> > Stephen Leake <> wrote:
> > 
> >> An "iterator" can be anything you want it to be. As Randy pointed out,
> >> there can be only one that gets special treatment from the compiler, but
> >> you did not mention that as a requirement.
> >>
> > 
> > I’m attempting to implement a Unicode string using UTF-8, so I want the
> > basic iterator over octets, then the next will iterate over the octets and
> > generate code points, then another will be graphème clusters.
> 
> Why do you bother? I mean, there is no solution for having a 
> user-defined array type in Ada. Iterator is only a small part of it. 
> Even if the iterator kludge worked somehow, the rest would not.
> 
> Multiple inheritance is not complete either, so having two array 
> interfaces for one object will be extremely difficult and uncomfortable. 
> You will end up with a mess of helper generic packages to emulate full 
> inheritance. [I went that way, there is nothing good there.]
> 
> In short, there is nothing useful Ada 20xx could bring to the problem of 
> dealing with encoded strings.

Sorry, didn't understand a word of this wrt to my post.

We can't have user defined array types in Ada? WTF? What wouldn't work?

How is MI involved here?

What has Ada 20xx got to do with anything?

Totally lost.