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Newsgroups: comp.lang.ada
Date: Tue, 29 Oct 2019 07:20:41 -0700 (PDT)
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Subject: Re: How to Iterate over all elements of a hashed_map.
From: Alain De Vos <devosalain71@gmail.com>
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Xref: reader01.eternal-september.org comp.lang.ada:57369
Date: 2019-10-29T07:20:41-07:00
List-Id: <comp.lang.ada>

I found code which takes a different approach, here there is a function .Iterate public ... ,

with Ada.Containers.Indefinite_Hashed_Maps;
with Ada.Strings.Hash;

with Ada.Text_IO; use Ada.Text_IO;

procedure Show_Hashed_Map is

   package Integer_Hashed_Maps is new
     Ada.Containers.Indefinite_Hashed_Maps
       (Key_Type        => String,
        Element_Type    => Integer,
        Hash            => Ada.Strings.Hash,
        Equivalent_Keys => "=");

   use Integer_Hashed_Maps;

   M : Map;
   --  Same as:  M : Integer_Hashed_Maps.Map;
begin
   M.Include ("Alice", 24);
   M.Include ("John",  40);
   M.Include ("Bob",   28);

   if M.Contains ("Alice") then
      Put_Line ("Alice's age is "
                & Integer'Image (M ("Alice")));
   end if;

   --  Update Alice's age
   --  Key must already exist in M.
   --  Otherwise an exception is raised.
   M ("Alice") := 25;

   New_Line; Put_Line ("Name & Age:");
   for C in M.Iterate loop
      Put_Line (Key (C) & ": " & Integer'Image (M (C)));
   end loop;

end Show_Hashed_Map;