delete this

[Mike - EMAIL IGNORED]

delete this; I have seen it used occasionally,
and I would have a use for it. Is it allowed?
Assuming, of course, that I do nothing to the
object thereafter.
Thanks,
Mike.

 

[Tomás]

Mike - EMAIL IGNORED posted:

delete this; I have seen it used occasionally,
and I would have a use for it. Is it allowed?
Assuming, of course, that I do nothing to the
object thereafter.
Thanks,
Mike.

If the system called the constructor, then it's most certainly Undefined
Behaviour.

If you yourself called the constructor, well... I'd have to look at the
code.


char string_memory[ sizeof( std::string) ];

std::string* p_str = new( string_memory ) std::string;

Then somewhere on in the fable:

delete this;

 

[mlimber]

delete this; I have seen it used occasionally,
and I would have a use for it. Is it allowed?
Assuming, of course, that I do nothing to the
object thereafter.
Thanks,
Mike.

See the FAQ:

http://www.parashift.com/c++-faq-lite/freestore-mgmt.html#faq-16.15

Cheers! --M

 

[Victor Bazarov]

Mike - EMAIL IGNORED posted:




If the system called the constructor, then it's most certainly Undefined
Behaviour.

If you yourself called the constructor, well... I'd have to look at the
code.

What "constructor"?

Mike: yes, it's perfectly fine.

char string_memory[ sizeof( std::string) ];

std::string* p_str = new( string_memory ) std::string;

Then somewhere on in the fable:

delete this;

What are you talking about?

V

 

[Aleksander Beluga]

delete this; I have seen it used occasionally,
and I would have a use for it. Is it allowed?

I suppose that it is OK. Think of member-functions just as about free
functions receiving this pointer.

 

[benben]

I suppose that it is OK. Think of member-functions just as about free

functions receiving this pointer.

They are trickier than you think.

Consider:

class C{
public:
void f(void){delete this;}
};

int main()
{
C c;
c.f(); // OOPS
}

Tell me what you think would happen in the line commented OOPS.

Regards,
Ben

 

[braveconf]

benben

Tell me what you think would happen in the line commented OOPS.

it is terrible.not to use like this.

C *pc=new C;
pc->f();

it is good.

 

[werasm]

delete this; I have seen it used occasionally,
and I would have a use for it. Is it allowed?
Assuming, of course, that I do nothing to the
object thereafter.
Thanks,
Mike.

see link:

http://groups.google.co.za/group/co...36404?q="delete+this"&rnum=1#e010a66be4336404


....or alternatively, search for "delete this" under
comp.lang.c++.moderated. This should give you enough to read

Werner