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From: slatyb@yahoo.com (K)
Newsgroups: comp.lang.ada
Subject: Re: Ada Popularity: Comparison of Ada/Charles with C++ STL (and Perl)
Date: 1 Oct 2004 23:48:11 -0700
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Date: 2004-10-01T23:48:11-07:00
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Bj�rn Persson <spam-away@nowhere.nil> wrote in message news:<pkf7d.4649$d5.36957@newsb.telia.net>...
> Kevin Cline wrote:
> 
> > Looks like I should have written:
> > 
> > struct X
> > {
> >   int a;
> >   int b;
> >   float c;
> >   std::string d;
> > }
>  
> :-) I thought you'd counter with that. So now you have a structure with 
> two integers, a float and a string, and you need to set a variable such 
> that the one or the other integer is selected depending on the variable.

No, I think that you are missing the whole point, which is to
represent a relationship between the members of the structure and
columns in a database.

This is pretty easy with the C++ pointer-to-member construct, but Ada
lacks that construct so you have to instead wrap the data members with
a function so you can store an access-to-function.  But it's worse,
since you will need two functions, one to read the datum and one to
set it.

> That makes it seem like there is some kind of relation between the 
> integers; 

There isn't.

> a relation that isn't there with the float or the string. So 
> it seems natural to group the integers together

It's not.