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From: Pascal Obry <pascal@obry.org>
Newsgroups: comp.lang.ada
Subject: Re: Improving Ada's image - Was: 7E7 Flight Controls Electronics
Date: 17 Jun 2004 23:05:30 +0200
Organization: Home - http://perso.wanadoo.fr/pascal.obry
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Hyman Rosen <hyrosen@mail.com> writes:

> Just for example, it is ubiquitous in C to have arrays of
> strings, either with or without a null pointer terminator:
>      const char *colors[] = { "Red", "Green", "Blue", 0 };
>      const char *CMYK[] = { "Cyan", "Magenta", "Yellow", "Black" };
> How do you carry this over into Ada?

As you've done in C, using pointers (I mean access types :):

   type String_Access is access constant String;
   type Color_Set is array (Positive range <>) of String_Access;

   Red   : aliased constant String := "Red";
   Green : aliased constant String := "Green";
   Blue  : aliased constant String := "Blue";

   Colors : constant Color_Set := (Red'Access, Green'Access, Blue'Access);

No need for a "null" terminator. In Ada we have the array bounds:

   for K in Colors'Range loop
      ...
   end loop;

Pascal.

-- 

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