A.1.3 Identifiers
(6.4.2.1)
identifier:
identifier-nondigit
identifier identifier-nondigit
identifier digit
(6.4.2.1)
identifier-nondigit:
nondigit
universal-character-name
other implementation-defined characters
(6.4.2.1)
nondigit: one of
_ a b c d e f g h i j k l m
n o p q r s t u v w x y z
A B C D E F G H I J K L M
N O P Q R S T U V W X Y Z
(6.4.2.1)
digit: one of
0 1 2 3 4 5 6 7 8 9