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Date: Thu, 07 Jul 2005 12:38:57 +0200
From: Georg Bauhaus <bauhaus@futureapps.de>
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Subject: Re: GCC 4.0 Ada.Containers Cursor danger.
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Date: 2005-07-07T12:39:08+02:00
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Dmitry A. Kazakov wrote:
> On Wed, 6 Jul 2005 18:07:38 -0500, Randy Brukardt wrote:
 
>>>It is not clear to me what the semantics a cursor has. Is it a location in the container?

>>It's not a location, and it wouldn't make sense for it to be one (other than
>>for a Vector).

> But it definitely refers to a location. Otherwise iteration using cursor
> would be impossible.

Why? A cursor designates an element. There are operations
on cursors, some of them let us move a cursor from one
element to another. Then the cursor designates another element.

I don't think there an implied requirement to think of locations.

    type Cursor is private;
  private
    type Cursor is access function (c: Container) return Pointer;


-- Georg