Re: Question about this piece of code.

From:
"AnonMail2005@gmail.com" <AnonMail2005@gmail.com>
Newsgroups:
comp.lang.c++
Date:
Sun, 10 Aug 2008 10:34:30 -0700 (PDT)
Message-ID:
<93281b46-5a25-4543-ae41-34d3e2beb229@k30g2000hse.googlegroups.com>
On Aug 10, 11:18 am, Jianwei Sun <jsunnewsgr...@gmail.com> wrote:

I am reading a peice of code which is at the following link:
http://www.brpreiss.com/books/opus4/html/page141.html#SECTION007123000
000000000000

The code is like this:

Object& StackAsLinkedList::Pop()
{
if(count==0)
throw domain_error("stack is empty");
Object& const result=*list.First();
list.Extract(&result);
--count;
return result;
}
Does this code return a reference to local variable result? If this is
the case, then this code has problem?

Thanks,
J.W.


The list extract function is here:

http://www.brpreiss.com/books/opus4/html/page98.html#SECTION005210000...-=

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If we ignore that result is a const and the return type is non-const,
it would seem that the returned value (a reference) refers to an
object that has been deleted inside the Extract function. This, of
course, is wrong.

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