Some classes need to allocate a varying amount of storage at run time. Such classes often can (and if they can, generally should) use a library container to hold their data. For example, our
StrBlob class uses a
vector to manage the underlying storage for its elements.
However, this strategy does not work for every class; some classes need to do their own allocation. Such classes generally must define their own copy-control members to manage the memory they allocate.
As an example, we’ll implement a simplification of the library
vector class. Among the simplifications we’ll make is that our class will ...