Question

I have the following case:

boost::ptr_vector<float> vec;

float* array = new float[4]();
vec.push_back(array);

// Add some more elements to vec..

How can I ensure that if I leave this scope and vec will be destroyed the ptr_vector’s destructor calls delete[] and not delete on every element of vec. I don’t understand how it should work, because the template parameter float will be the same for float* and float[4].

Answer 1

You could specify the CloneAllocator template parameter of ptr_vector to be something other than the default, heap_clone_allocator. There is no way to make an instance of the actual class boost::ptr_vector<float> use delete[] instead of delete.