Re: Just want to make sure...
Noah Roberts wrote:
Drew Lawson wrote:
In article <49f75393$0$2709$cc2e38e6@news.uslec.net>
Noah Roberts <noah@nowhere.com> writes:
#include <iostream>
#include <memory>
struct T {};
std::auto_ptr<T> f() { return new T; }
int main()
{
std::auto_ptr<T> at = f();
std::cout << "test\n";
std::cin.get();
}
The above code should compile and work fine, no? I should not be
getting a crash due to doubly deleted memory segments...right?
I've used auto_ptr, but never as a return type.
I think you really want to return a T* and store it in auto_ptr.
Otherwise 'at' may be a copy of a temporary auto_ptr.
And that would be bad.
It shouldn't be. The temporary should be assigned to at, which then
holds the ptr while the original temp holds 0.
'std::auto_ptr' has a special copy c-tor, one that takes a non-const
ref. A temporary cannot be used to construct another 'auto_ptr'.
That's the problem, I believe.
V
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