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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: syntaxic exploration
Date: Mon, 25 Dec 2017 18:03:01 +0100
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Xref: reader02.eternal-september.org comp.lang.ada:49637
Date: 2017-12-25T18:03:01+01:00
List-Id: <comp.lang.ada>

On 2017-12-25 15:42, Mehdi Saada wrote:
> More importantly, why would anyone use an enumeration type with only
> one value ? I don't get it.

Consider table-driven descent-recursive parser. The template is

    case Statement_Table.Match (Source) is
       when If_Token =>
          ...
       when For_Token =>
          ...
    end case;

Statement_Table is a type from a generic table package instantiated with 
a token enumeration type. Should the table have only one expected match 
the enumeration type has just one element.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de