# C++ Scratchpad

## New features in C++

- 23 and 26
- r-value (and the values that I forgor)

## Patterns

- CRTP

## compiler options that make undefined an error

- -fsanitize=undefined
- chk_add(), chkd_sub(), chkd_mul()
- non-portable ways to check CPU overflow
  - msvc intsafe.h

## Design Patterns