I have tried and it gives the same error message. Cool!
code for file vector, and it is appreciated if you could review and comment.
"George" <George@discussions.microsoft.com> wrote in message
news:878AA930-A216-4BE1-8B32-BDACF5E6EFB9@microsoft.com
`auto_ptr' may be copied and see "vc.push_back (pi);" statement.
The signature of `vector::push_back' method requires const
parameter. But `auto_ptr' doesn't provide such constructor. That's
Sorry, Alex. I do not agree that the error comes from the push_back
method input. There is no problem to pass non-const reference to
const reference, but not vice versa (this is the root cause of this
issue).
To prove it, here is my code. Any comment?
class Foo
{
};
class myVector{
public:
void push_back (const Foo& input)
{
}
void foo()
{
Foo f;
push_back (f);
}
};
To make this resemble the situation with vector and auto_ptr, do two
things.
a) Add a Foo copy-constructor that takes Foo& (thus suppressing an
implicitly defined one that takes const Foo&):
class Foo {
public:
Foo(Foo&) {}
};
b) In push_back, actually make a copy of the parameter, as
vector::push_back has to do:
void push_back (const Foo& input) {
Foo copy = input;
}
See if you get an error now.
--
With best wishes,
Igor Tandetnik
With sufficient thrust, pigs fly just fine. However, this is not
necessarily a good idea. It is hard to be sure where they are going to
land, and it could be dangerous sitting under them as they fly
overhead. -- RFC 1925