Created on 2014-07-15.00:00:00, last changed 2014-07-15.00:00:00.
According to 5.10 [lex.name] paragraph 1,
Each universal-character-name in an identifier shall designate a character whose encoding in ISO 10646 falls into one of the ranges specified in
However, identifier-nondigit is also used in the grammar for pp-number. Should this restriction also be understood to apply in that non-identifier context?