Re: placement new called by vector<> during resizing.

 We have a class that has its own overloaded operator new and whose
prototype seems to correspond to the standard placement new :-

class AppClass
{
  public:
       operator new (size_t size, void *ctx)

.....
}

  The ctx is important for us. Now we find that if we have a
vector<AppClass> instance, when the vector is resized, our overloaded
operator new is called!. Here is the comment from the STL vector
implementation :-

template<class _T1,
class _T2> inline
void _Construct(_T1 _FARQ *_Ptr, const _T2& _Val)
{ // construct object at _Ptr with value _Val
new ((void _FARQ *)_Ptr) _T1(_Val);
}

   Is this documented somewhere in the standard?

Or should we have
chosen our operator new's signature more carefully?

Can I do some easy
thing to get around this issue?