Re: Modular integers

["Lars" <lars-remove_me-m@gmx.net>]

Yes, it is not "reset".  I don't know a better word to describe it ...

Why couldn't the compiler insert code that checks what the upper limit of
the type is, then substracts the current value of the variable from the
upper limit to see if the difference is bigger or equal to the number you
want to add? If it is not, it could throw an exception ...


> No.  By definition modular numbers cannot "overflow."  In fact, to say the
> value
> is "reset" to 0 is incorrect.  0 simply follows 2**64 - 1.
>
> You can declare a _signed_ 64-bit integer type which will overflow when
> adding
> 1 to 2**63-1, or underflow when subtracting 1 from -(2**63).