vector of pimpl's / weird behavior

From:

er <erwann.rogard@gmail.com>

Newsgroups:

comp.lang.c++

Date:

Fri, 28 Sep 2007 19:49:45 -0000

Message-ID:

<1191008985.700582.55290@19g2000hsx.googlegroups.com>

hi,

the code below generates the following behavior. cld someone please
help understand it?
1) clean project + build project generates build errors (see bottom)
2) build a second time, errors disappears, run: ok
3) uncomment [1] and comment [2], no problem
4) uncomment [3] and [4], also no problem

#ifndef A_IMPL_H_
#define A_IMPL_H_
#include <memory>
class A_impl{
    public:
        A_impl();
        virtual ~A_impl(){};
        virtual std::auto_ptr<A_impl> clone()const=0;
    private:
        A_impl& operator=(const A_impl&);
};
#endif /*A_IMPL_H_*/

#ifndef A_H_
#define A_H_
#include <memory>
//#include "A_impl.h" // [1]
class A_impl;//[2]
class A{
    public:
        A(const A_impl& impl_);
        A(const A& o);
        A& operator=(const A& rhs);
    private:
        A();
        std::auto_ptr<A_impl> pimpl;
};
#endif /*A_H_*/

#ifndef AS_H_
#define AS_H_
#include <vector>
#include "A.h"
class As{
    public:
        As(
            const std::vector<A>& sub_collec_
        );
    private:
        std::vector<A> sub_collec;//[3]
};
#endif /*AS_H_*/
#include "A.h"
#include "A_impl.h"
A::A(const A_impl& impl_):pimpl(impl_.clone()){};
A::A(const A& o):pimpl((o.pimpl)->clone()){};
A& A::operator=(const A& rhs){
    if(&rhs!=this){
        pimpl=rhs.pimpl->clone();
    };
    return *this;
};
#include "As.h"
As::As(
    const std::vector<A>& sub_collec_
): sub_collec(sub_collec_){};//[4]

instantiated from 'void std::_Destroy(_Tp*) [with _Tp = A]'
testing_vector_pimpl A.h line 6 1191008360119 128231
/usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../include/c++/4.1.2/bits/
stl_construct.h instantiated from 'void
std::__destroy_aux(_ForwardIterator, _ForwardIterator, __false_type)
[with _ForwardIterator = A*]' testing_vector_pimpl line 122
1191008360120 128232
/usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../include/c++/4.1.2/bits/
stl_construct.h instantiated from 'void
std::_Destroy(_ForwardIterator, _ForwardIterator, std::allocator<_T2>)
[with _ForwardIterator = A*, _Tp = A]' testing_vector_pimpl line 182
1191008360120 128234
/usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../include/c++/4.1.2/bits/
stl_construct.h instantiated from 'void
std::_Destroy(_ForwardIterator, _ForwardIterator) [with
_ForwardIterator = A*]' testing_vector_pimpl line 155 1191008360120
128233
/usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../include/c++/4.1.2/bits/
stl_vector.h instantiated from 'std::vector<_Tp, _Alloc>::~vector()
[with _Tp = A, _Alloc = std::allocator<A>]' testing_vector_pimpl line
272 1191008360120 128235