BOOST_FOREACH在boost :: shared_ptr上崩溃了吗？

Question

Trying todo a simple on a vector of shared_ptr and it crashes? I am suspecting I am doing something obviously wrong?

std::vector< shared_ptr<SUBCLASS> > m_vecSections;

shared_ptr<SUBCLASS> hoodSection;
BOOST_FOREACH(hoodSection, m_vecSections ){
   //do something
}

I am getting a crash in

 void add_ref_copy()
{
    atomic_increment( &use_count_ );
}

Answer 1

I think your syntax should be:

BOOST_FOREACH(shared_ptr<SUBCLASS> hoodSection , m_vecSections ){
   //do something
}

Answer 2

Are you adding or removing elements from m_vecSections inside the BOOST_FOREACH ?

That can lead to undefined behavior because BOOST_FOREACH caches the end iterator (so it'll become invalid if the vector is changed). See http://www.boost.org/doc/libs/1_52_0/doc/html/foreach/pitfalls.html

Answer 3

Thankyou guys

You had no chance to find it, a call like this...

weak_ptr weakHood(shared_ptr(this));

released the m_vecSections and caused the crash...