Re: How to allocate a static class attribute in c++?

From:
 herman <Herman.Schultz@gmail.com>
Newsgroups:
comp.lang.c++
Date:
Thu, 23 Aug 2007 16:10:44 -0000
Message-ID:
<1187885444.859135.262170@z24g2000prh.googlegroups.com>
On Aug 23, 10:49 am, Neelesh Bodas <neelesh.bo...@gmail.com> wrote:

On Aug 23, 8:23 pm, herman <Herman.Schu...@gmail.com> wrote:

Hi,

I have a static class attribute in my class:

class A
{
   public:
      static B aB;

}

How can I allocate this static class attribute?


aB is a data member, not a pointer. You shouldnot call "new" for
allocating (as you did below)
Simply saying

B A::aB;

will work, provided the definition of B is in scope, and constructor
B::B() is callable.

I think I need to do this

A::aB = ??? ;

If I do this:

A::aB = new B(); // where/when will aB be deleted if I allocate it on
the heap?


you can't do this, since aB is not a pointer

If I dont do anything, I have this linker error:

A.cpp:229: undefined reference to `A::aB'


Finally, lookup "static initialization order fiesco" :http://www.parashift.com/c++-faq-lite/ctors.html#faq-10.12

-N


Thanks a lot for both answers! ;)

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