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STL container of auto_ptr

my version of the STL has the following documentation:

You can pass an auto_ptr<Type> object by value as an argument to a function
call. You can return such an object by value as well. Both operations depend
on the implicit construction of intermediate objects of class
auto_ptr<Type>::auto_ptr_ref<Other>, by various subtle conversion rules. You
cannot, however, reliably manage a sequence of auto_ptr<Type> objects with a
Standard Template Library container.

Is this restriction against having, say, a vector of auto_ptr normal? If
so, why?
Jul 23 '05 #1
2 1474
* Boston:

Is this restriction against having, say, a vector of auto_ptr normal?
It's in the standard, if that's what you're asking.

If so, why?


Technically because a std:.atuo_ptr is not a copyable object. Standard
containers require copyable objects. They copy things around.

--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
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Jul 23 '05 #2

"Alf P. Steinbach" <al***@start.no> wrote in message
news:41****************@news.individual.net...
* Boston:

Is this restriction against having, say, a vector of auto_ptr normal?


It's in the standard, if that's what you're asking.

If so, why?


Technically because a std:.atuo_ptr is not a copyable object. Standard
containers require copyable objects. They copy things around.


Ah, because if you copy the auto_ptr, the source sets its ptr to NULL,
therefore it couldn't be const&. I understand now, thanks.
Jul 23 '05 #3

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