if you're talking about this example:

  const   uint16    max_pressure = 100; 
  enum  Switch_position  {up, down};

``Switch_position'' is not the name of a variable, but an enum type.

Just to add to what was already said, the doc said for enumerator values - which are indeed lower case in the example. Not a blanket statement for all variables.

No it isn't, it's an enum type.

Perhaps I found an error.

AV Rule 69 says to use `const` by default on member functions. Yet in some examples (e.g. AV Rule 122 in Appendix A) they don't use the `const` keyword when they can.

Nevermind. :-)