Re: auto_ptr not dereferencable

From:
raof01 <fera_bill@hotmail.com>
Newsgroups:
comp.lang.c++
Date:
Thu, 28 Feb 2008 05:23:51 +0000 (UTC)
Message-ID:
<7c6e259510068ca479e2efe3830@news.cn99.com>
Hello mkarja,

On 28 helmi, 07:00, raof01 <fera_b...@hotmail.com> wrote:

Hello mkarja,

"Debug Assertion Failed, auto_ptr not
dereferencable"
please new one instance and is pointed by auto_ptr.

Thank you for the answer, but I'm sorry, I don't understand what you
mean.
Do you mean that I should do something like this:
std::auto_ptr<osCom> m_osCom (new osCom);
I've tried that, but it just gives me an error saying, "error C2059:
syntax error : 'new'"
----
mkarja

Forgot "()"? :-)
std::auto_ptr<osCom> m_osCom (new osCom());
But I think you'd better initialize m_osCom in ctor.
BTW, are you coming from C# community or ?

It gives the same syntax error even with
std::auto_ptr<osCom> m_osCom (new osCom());
Do I have to initialize it somehow in the .h or .cpp file before I try
to use it in the .cpp file?

No, I'm not coming from C#. Just never used auto_ptr before and are a
bit lost with it, it seems :)

----
mkarja


Sorry for confusing you. If osCom doesn't have ctor with no arguments, you
should use another ctor of osCom.
E.g.
You have:
class osCom
{
public: // All kinds of ctor's but without osCom()
    osCom(int) { /* ... */ }
    osCom(const string &) { /* ... */ }
// ...
};
Then you will use something like below:
    std::auto_ptr<osCom> m_osCom (new osCom(0));
or
    std::auto_ptr<osCom> m_osCom (new osCom("Hello"));

If you want to initialize it elsewhere, put the initialization into initialization
list of ctor - just a recommendation.

All my code can be compiled by g++ 3.4.4.

WBR,
raof01
mailto:fera_bill@hotmail.com
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