Identifier
An identifier is a name used in a Frost program to refer to a class, method, variable, or other program element.
Identifiers must begin with a letter or underscore (_
), and continue with any number of letters,
underscores, or digits. Keywords are reserved and may not be used as identifiers. An
underscore by itself is not a legal identifier, as that is used to ignore values when extracting
values from a tuple in a multiple assignment.