How should a size-limited stl-like container be implemented?

Question

While refactoring, I wanted to change an array where entries are added to an std::vector, but for compatibility (persistency, downgrading,...), it still needs to have an upp

Answer 1

Customize the vector class to impose an upper limit. Probably, you can have a new api exposed which will check the size against the upper limit and return false if exceeds otherwise call the regular insertion method.