Question

I have a vector that I am loading with a know amount of elements (N).

The processing dynamically creates new elements, which are appended to the vector.

I am expecting about 2 * N additional elements to be created, so I resize the vector to 3 * N.

If the additional elements exceed that, I would like a program abort, rather than a dynamic expansion of the vector.

Is there a way to detect that, that is portable between AIX/TRU64/Linux?

Answer 1

Detect what? Whether the vector will be resized? Whether it has been?

The only real way to achieve this is to provide checking functionality either in a custom allocator or a function that adds elements to the vector.

e.g

template<class T>  void add_element(std::vector<T>& container, T const& v) {   if (container.capacity()+1 >= 3*N)   {     // terminate/exception/whatever   }   container.push_back(v); }