Tokens

ITEM

DESCRIPTION

#

Comment. Text till the end of the line is ignored.

AAA or NNN

Literal tokens. Completely alphabetic or completely numeric.

_AAA

Nonliteral tokens must begin with underscore. All the remaining letters MUST be alphabetic. Currently, only alphabetics are allowed after the initial underscore.

"XXX"

Strings get double quoted. Everything within string taken literally (except backslashed characters).

\X

Backslash any nonalphanumeric char you want taken literally.
If X = one of a b n r f t v, these are special escapes analogous to C/C++.

\\

Literal backslash character.