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From: "Dr. Adrian Wrigley" <amtw@linuxchip.demon.co.uk.uk.uk>
Subject: Re: Enum'Image (Was: Improving Ada's image)
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Date: Mon, 21 Jun 2004 17:06:35 +0100
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Date: 2004-06-21T17:06:35+01:00
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On Mon, 21 Jun 2004 17:30:19 +0200, Jacob Sparre Andersen wrote:
...
> That would probably be the best way to do it.  It would keep old
> programs working, and it seems like a logical Ada-like way of doing
> things.
> 
>    type Colours is (Red, Green, Blue);
>    for Red'Image use "R";
>    for Green'Image use "G";
>    for Blue'Image use "B";

Potentially useful - but very verbose in the simple case.  If it
takes fifteen lines of code to declare an enumeration with
nicely cased 'Image, the critics would have a field day!
Keeping the representations and enumeration synced would be
unnecessary work.

Something to say "use the names spelled as I spell them" is
needed.

pragma Enum_Image_Case (Colours, Verbatim|Upper|Lower|...);

Of course, if we had had Verbatim from the start, we could have
use To_Upper, To_Lower if we wanted :(  And I can't recall any
situation where I wanted the case of the enumerations converted
as the language specifies.
-- 
Adrian Wrigley, Cambridge, UK.