Should I use unsigned integers for counting members?

Question

Should I use unsigned integers for my count class members?

Answer

For example, assume a class

TList  = class
private
           


        

Answer 1

Regarding your statement that "I think it's in general a good principle to always use the least general (ergo the most special) type possible." - actually I think it's a good principle to use the data type that will cause you least angst and trouble.

Generally for me that's a signed int since:

1. I don't usually have lists with 2³¹ or more elements in them.
2. You shouldn't have lists that big either :-)
3. I don't like the hassle of having special edge cases in my code.

But it's really a style issue. If 'purity' of code is more important to you than brevity of code, your method is best (with modifications to catch the edge cases). Myself, I prefer brevity since edge cases tend to clutter the code and reduce understanding.