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Newsgroups: comp.lang.ada
Subject: Re: Ada Popularity: Comparison of Ada/Charles with C++ STL (and Perl)
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From: Matthew Heaney <matthewjheaney@earthlink.net>
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Date: Wed, 29 Sep 2004 03:50:16 GMT
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kevin.cline@gmail.com (Kevin Cline) writes:

> Matthew Heaney <matthewjheaney@earthlink.net> wrote in message
> news:<u7jqeubqg.fsf@earthlink.net>...
> > 
> > You're still confused.  The local subprograms are analogous to STL
> > binders and function objects.  The generic part is Generic_Op.  The rest
> > is just glue.
> 
> But 14 lines of glue for every different array type that I want to use
> with Generic_Op?  That's the sort of repetition that turned me away
> from Ada in the first place.

You're still confused.  The "unnecessary code" typically includes
up-level references to entities in the enclosing scope, e.g.

procedure Op (C : CT) is

   Sum : Integer'Base := 0;

   procedure Add_E_To_Sum (E : Natural) is
   begin
      Sum := Sum + E;
   end;

begin

   C.Iterate (Sum'Access);

   ... --do something with Sum

end Op;


> I like languages where I can say what I want, and only have to say it
> once.  I don't like languages where I have to cut and paste endless
> variations of boilerplate code.  For that reason I like C++ and Perl
> and LISP and don't like Ada and Java and C#.

That's just swell.