Re: Starter project: getopt_long in Ada

["Yannick Duchêne (Hibou57)" <yannick_duchene@yahoo.fr>]

Le Fri, 25 Nov 2011 17:39:31 +0100, Georg Bauhaus  
<rm.dash-bauhaus@futureapps.de> a écrit:
> package Natools.Handlers is
>
>     type Id_And_Argument_Handler
>        (Posixly_Correct :  Boolean;
>         ...)
>     is abstract tagged private;
>
>     procedure Callback
>         (Handler : in out Id_And_Argument_Handler;
>          Id : Option_Id;
>          Argument : String) is abstract;
>
>     procedure Missing_Argument
>         (Handler : in out Id_And_Argument_Handler;
>          Id : Option_Id) is null;
>
>     etc.
>
> end Natools.Handlers;
I had the same question in my mind too. I am in favor of tagged type above  
access to subprogram, but was thinking this was perhaps just a matter of  
personal preferences. Do someone know about some on-line papers talking in  
deep about tagged types vs access to subprograms ?

-- 
“Syntactic sugar causes cancer of the semi-colons.” [1]
“Structured Programming supports the law of the excluded muddle.” [1]
[1]: [Epigrams on Programming — Alan J. — P. Yale University]