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From: "Grein, Christoph" <christoph.grein@eurocopter.com>
Subject: Re: Ada Configuration API for Unix and Windows
Date: Thu, 5 Dec 2002 07:10:08 +0100 (MET)
Date: 2002-12-05T07:10:08+01:00	[thread overview]
Message-ID: <mailman.1039069081.6868.comp.lang.ada@ada.eu.org> (raw)

> > >   Put(reg,To_Key("A_Key"),"A Value"); -- A Key in the default section
> > >   Why is the conversion To_Key necessary? Surely it could be done by
> > > Put?
> > 
> > I have decided to introduce special types for sections and values,
> > so that the user can not accidentialy permute sections and keys or
> > other unbounded strings, specialy when variables are used (and not
> > simple string literals like in the example).
> 
> That seems to make sense at first, but just gets in the way in the
> long run. A string is a string. Named association is a better
> solution. 

declare
  -- type T is new String;  or alternatively
  type T is array (Positive range <>) of Character;
  procedure P (L: T; R: String) is
  begin
    null;
  end P;
begin
  P ("AAA", "BBB");      -- legal
  P (T'("AAA"), "BBB");  -- legal
  P (T("AAA"), "BBB");   -- illegal (type of "AAA" can not be determined)
end;

So again: Why is the conversion necessary?



             reply	other threads:[~2002-12-05  6:10 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-12-05  6:10 Grein, Christoph [this message]
  -- strict thread matches above, loose matches on Subject: below --
2002-12-03 16:47 Ada Configuration API for Unix and Windows Ulrich Eckhardt
2002-12-03 21:35 ` Stephen Leake
2002-12-03 22:29   ` Martin Dowie
2002-12-03 22:57     ` Stephen Leake
2002-12-04 13:09       ` Martin Dowie
2002-12-04  9:27   ` Ulrich Eckhardt
2002-12-04 13:49     ` Stephen Leake
2002-12-04 14:20       ` Ulrich Eckhardt
2002-12-05  8:43   ` Victor Porton
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