Re: ada vs. cpp

["Mike Mohr" <nospam@nowhere.com>]

"Pascal Obry" <p.obry@wanadoo.fr> wrote in message
news:u8zepgmea.fsf@wanadoo.fr...
>
> "Mike Mohr" <nospam@nowhere.com> writes:
>
> > C++ has a string class.
>
> I know.

I doubt you did because you had indicated otherwise.

>Yet in C/C++ it is hard to beat
>
>         V1 : constant String := "1234567890";
>         V2 : constant String := "AAA" & V1 (3 .. V1'Last - 2) & "BBB";
>
> in readability and ease of use.

const string V1 = "0123456789";
const string V2 = "AAA" + V1.substr(3, V1.size() - 2) + "BBB";

The indices may be off because I am not too familiar with Ada
but as you can see, the C++ version mirrors the Ada version
pretty closely.

>
> I have done many text processing code in both C/C++ and Ada and from
> experience I found the Ada code far more readable. There is may examples.

Of course you do (find Ada more readable), you are an Ada programmer.

I doubt that this

V1 (3 .. V1'Last - 2)

is intuitive or readable to non-Ada programmers.

>
> Another one that come to mind:
>
>         V1 : constant String := "0123/zzz";
>
>         subtype Code is Positive range 1 .. 4;
>         subtype Arg  is Positive range 6 .. 8;
>
>         V2 : constant String := V1 (Arg) & '-' & V1 (Code);
>
> This is not theory, I have used these kinds of code many many times. And
again
> I don't see how we could have a better readability !

const string V1 = "0123/zzz";
const string V2 = V1.substr(0, 4) + "-" + V1.substr(5,7);

Even though your efforts to describe something easy for Ada
and hard for C++ have failed, you should know that I can play
these C++-strings-can-do-this-in-2-lines-and-Ada-can't
games as well.

Isolated examples which measure LOC are not a basis
to claim that Ada strings are superior to C++ strings or
that C++ strings are superior to Ada strings, or Java
Strings etc...

Completely unrelated issue; does anyone know
the cost of ObjectAda for windows?

I have the free download version and I like it.

>
> Pascal.
>
> --
>
> --|------------------------------------------------------
> --| Pascal Obry                           Team-Ada Member
> --| 45, rue Gabriel Peri - 78114 Magny Les Hameaux FRANCE
> --|------------------------------------------------------
> --|         http://perso.wanadoo.fr/pascal.obry
> --|
> --| "The best way to travel is by means of imagination"