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From: blaak@infomatch.com (Ray Blaak)
Subject: Re: Enumeration literal visibility and use type
Date: 1998/05/26
Message-ID: <6kf612$iuj$1@berlin.infomatch.com>#1/1
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References: <6kej65$dnh$1@hermes.seas.smu.edu>
 <6kejt5$75u@gcsin3.geccs.gecm.com> <6kelnr$ief$1@polo.advicom.net>
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Date: 1998-05-26T00:00:00+00:00
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"David C. Hoos, Sr." <david.c.hoos.sr@ada95.com> writes:
>John is correct.  The only way I've found to make the literals visible
>(without a context clause "use doodah;") is in the units requiring
>visibility is to declare:
>state_0 : constant doodah.state_value_type := doodah.state_0;
>Anyone have a better way?

I like doing:

  package doodah is
    package State is
      type Value is (state0, state1, ...);
    end State;
    ...
  end doodah;

  with doodah;
  procedure Main is
    use doodah.State;
    cool : doodah.State.Value := state0;
  begin
  end Main;

Another approach, especially when you only need the literals in a case
statement, is to do:

  package doodah is
    type state_value is (state0, ...);
    ...
  end doodah;

  with doodah;
  procedure Report_State(The_State : in doodah.state_value) is
    type states is new doodah.state_value; -- literals are now in scope
  begin
    case states(The_State) is
    when state0 => ...;
    when state1 => ...;
    ...
    end case;
  end Report_State;

Cheers,                                        The Rhythm is around me,
                                               The Rhythm has control.
Ray Blaak                                      The Rhythm is inside me,
blaak@infomatch.com                            The Rhythm has my soul.