How to delete item from list, while iterating through list?

How would i delete an item from a list<> class while im iterating through the list? I need it to first delete the item, than go to the next item without any problems.

Code:

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for(list<ThrowObject>::iterator it = throwObjects.begin(); it != throwObjects.end(); ++it)
{
    ThrowObject& throwObject = *it;

    //do stuff

    if(****)  //delete the item
    {
      ??
    }
}

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Quote:

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Originally Posted by 39ster

How would i delete an item from a list<> class while im iterating through the list? I need it to first delete the item, than go to the next item without any problems.

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You have to obtain the next iterator value BEFORE erasing the element the iterator is pointing to. Generally:

Code:

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for(iterator it = x.begin(), next; it != x.end(); it = next)
{
    next = it;
    ++next;
    // do stuff, possibly deleting the element
}

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Worked. Thanks.

The "erase" method returns the next iterator when removing:

Code:

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std::list<T>::iterator i = List.begin();
while(i != List.end())
{
  if(ShouldIDeleteThis())
  {
    i = List.erase(i);
  }
  else
  {
    i++;
  }
}

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You can also avoid the manual loop if you turn the if (...) contents into a unary function/function object and use list::remove_if