Re: Avoiding side effects

[Anders Wirzenius <anders@no.email.thanks.invalid>]

Jean-Pierre Rosen <rosen@adalog.fr> writes:

> Anders Wirzenius a �crit :
> [...]
> > The problem is how to deal with the situation when I reach the
> > end of the file. I have done it using a side effect:
> > EOF_Reached     : Boolean := False;
> > loop
> >    Trans_String...
> >    exit when EOF_Reached;
> >    Trans_String...
> >    exit when EOF_Reached;
> > end loop;
> > --  Display possible tail of file A.
> > EOF_Reached is set to True in the functions Strip and Advance as
> > a side effect.
> > Is there a better way without using the side effect EOF_Reached?
> >
> 
> Exceptions of course!

Please don't feel like I am provocative. I just want to find out
the difference between exceptions and side effects:

Why is an exception in this case not considered to be a side
effect?

-- 
Anders