How to using boost_auto?

Question

Hi,
I still haven't found a direct efficient way with this code:
The problem is that after removing the vector element, boost_auto throws an error :

vector iterators incompatible and then the my program crashed.

for (BOOST_AUTO(x, A.begin()); x != (A.end()); ) {  
  if (_checksomething) {  
++x;  
  }  
  else {  
   A.erase(x);  
--x;  
  }  
}  

if add code: --x;

I could avoid with a copy array or save the index but I think it's temporary and maybe longer..
Is there other way to fix this?

Thanks you!

Answer 1

You likely want x = A.erase(x). vector::erase returns an iterator to the element following the one that's erased.

The reason A.erase(x); --x; doesn't work is because erase(x) invalidates the iterator. The only thing you can do with x afterwards is assign a new value to it.