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From: kevin.cline@gmail.com (Kevin Cline)
Newsgroups: comp.lang.ada
Subject: Re: Ada Popularity: Comparison of Ada/Charles with C++ STL (and Perl)
Date: 27 Sep 2004 07:31:44 -0700
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Date: 2004-09-27T07:31:44-07:00
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Matthew Heaney <matthewjheaney@earthlink.net> wrote in message news:<uekkpt07s.fsf@earthlink.net>...
> kevin.cline@gmail.com (Kevin Cline) writes:
> 
> > 
> > One of the most frustrating things I found in Ada programming was the
> > inability to make user-defined types work like the built-in types. 
> > Given
> > 
> >   A: array (1..10) of integer;
> > 
> > then the expression A(5) is a modifiable reference to the fifth
> > element of A.
> > 
> > After experience with C++ it was amazingly frustrating to learn that
> > there was no way I could define My_Container so that I could write:
> > 
> >   C: My_Container ;
> > 
> >   C(5) := 7;
> 
> 
> Indeed, you cannot do this.  In AI-302 (and in Ada.Strings.*), you have to say:
> 
>    Replace_Element (C, Index => 5, By => 7);

I think this was a major error in the language design.  As a result it
very tedious to write a generic that will work with both predefined
and user-defined types.