> how do you write a library that guaranteed will not have integer overflow on any existing or future architectures and compilers? By following the behavior in

> how do you write a library that guaranteed will not have integer overflow on any existing or future architectures and compilers? By following the behavior in the standard, and not trying to imagine how the standard is implemented. For example, C23 includes https://en.cppreference.com/w/c/header/stdckdint https://en.cppreference.com/w/c/header/stdckdint, which you can safely use to check for overflows. It's also in C++23. If you're not on the latest standards, there are techniques to do so as well, these macros codify existing practice: https://stackoverflow.com/questions/199333/how-do-i-detect-unsigned-integer-overflow https://stackoverflow.com/questions/199333/how-do-i-detect-u...