Syntax

Identifier:


Normal-Identifier
Dot-Identifier

Normal-Identifier
NonDigit
Normal-Identifier Identifer-Character

Dot-Identifier
. Normal-Identifier

Identifier-Character
NonDigit
Digit

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

Digit: one of

 0 1 2 3 4 5 6 7 8 9