# A comment starts with a '#' and ends with the end-of-line character.
# Meta commands are comments that look as follows '#!<command> parameters
# E.g. #!namedexpression V2 "Syntax 2.0..."

#!namedexpression V2 "Syntax 2.0..."

file	: { prod } .
prod	: lhs ":" expr "." .
lhs	: NAME .
expr	: term { "|" term } .
term	: factor { factor } .
factor	: TERMINAL
	| LITERAL
	| [ '<' ATTR '>' ] NAME
	| "[" expr "]"			    # optional expressions
	| "{" expr "}"                      # 0... expressions
	| "(" expr ")"			    # grouped expression
	| (+V2 "(+" NAME expr ")" )         # named expr
	.