Re: Newbie question about pointers in GNAT 3.15p on Windows 2000 : to Steve

["David C. Hoos, Sr." <david.c.hoos.sr@ada95.com>]

----- Original Message ----- 
From: "prashna" <vashwath@rediffmail.com>
Newsgroups: comp.lang.ada
To: <comp.lang.ada@ada.eu.org>
Sent: February 24, 2003 12:40 AM
Subject: Re: Newbie question about pointers in GNAT 3.15p on Windows 2000 : to Steve


> > If you are absolutely certain the variable will not be referenced after the
>                                     ^^^^^
> > lifetime of the procedure or function in which it is declared> 
> 
> Hi Steve, 
> This sentence is bit confisung for me.I am not sure you are talking
> about which variable. Are talking about BUFSIZE (or P_SIZE). Both
> these variables are local to function X and it is absolutely
> impossible to refer these variables outside X.Please clarify this.
> And also please let me know how it is risky if I use
> 'Unchecked_Access.
He is referring to the variable of which you are taking the 'access --
i.e., BUFSIZE.  It is risky to use 'Unchecked_Access if the result of
the 'Unchecked_Access attribute is passed outside the function, because
when BUFSIZE goes out of scope (i.e., when X returns), the result of the
'Unchecked_Access which has been passed outside of X will no longer be
valid.
> 
> Thanks in Advance
> Ashwath
> _______________________________________________
> comp.lang.ada mailing list
> comp.lang.ada@ada.eu.org
> http://ada.eu.org/mailman/listinfo/comp.lang.ada
> 
>