Validation refers to problems where data must be checked to ensure it conforms to a certain form, or to a limited set of values.

A problem I come across rather frequently has to do with the fact that input in C++ requires a pre-existing variable of the correct type, which either has to be uninitialized or initialized to some “safe” value. There’s a third option, though, and it’s the topic of my first Tippet. Continue Reading