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Date: Fri, 16 Sep 2022 08:47:03 -0700 (PDT)
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Subject: Re: Non-standard functions in GNAT's Ada.Containers packages?
From: Jere <jhb.chat@gmail.com>
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On Thursday, September 15, 2022 at 1:11:19 PM UTC-4, amado...@gmail.com wrote:
> Thanks, Niklas. 
> 
> > ... There are functions First and Next ... procedure Iterate ... 
> 
> Too verbose and error-prone (forget the Next and you get an endless loop).
> > "for X of M loop ... end loop".
> Not possible for maps.

I'm not sure I understand.  I tried it in gnat 11 and it compiled just fine:
*************************************************
    with Ada.Text_IO; use Ada.Text_IO;
    with Ada.Containers.Ordered_Maps;
     
    procedure Program is
        package Maps is new Ada.Containers.Ordered_Maps(Integer,Integer);
     
        Map : Maps.Map;
     
    begin
     
        Map.Insert(1,10);
        Map.Insert(2,20);
        Map.Insert(3,30);
        Map.Insert(4,40);
     
        for Element of Map loop
            Put_Line(Element'Image);
        end loop;   
    end Program;
*************************************************
Output:
10
 20
 30
 40
*************************************************

Even tried it on some online compilers and it compiled and ran:
IDEONE online compiler:  https://ideone.com/H2oEZt

If this isn't what you mean, what is the missing feature.?  the "for of" version does work for maps as far as I can tell.