>I should also note that C23 will also have Binary Integer Literals, so the same number can be written out in a more precise grouping of binary as well:

  const unsigned magical_number = 0b0110'0001'0110'0011'0110'0001'0110'0010;

Finally. It’s mystifying to me why this took so long to add; not everyone is fluent in translating hex digits to binary nybbles on the fly. This will greatly help with clearly defining and manipulating bitfields. The fact that digit separators can be placed arbitrarily will further help delimit fields of variable width, e.g.

  #                    A B C  D
  uint8_t flags = 0b00’1’0’11’01;

A and B are binary fields; C and D are quaternary fields. The first two bits are padding. This is a lot more readable than

  uint8_t flags = 0x2D;