pegpig

Recursive-descent C++ parser generator from Parsing Expression Grammar

Operators

Expression	C++	Class	Description
eof	eof_parser	End of input
.	any	any_parser	Any character
'{'	'{' or ch('{')	char_parser	Literal character
[0-9]	rng["0-9"]	char_range	Character class
[eE]	set{"eE"}	char_set	Character class
"int"	"int" or lit{"int"}	literal	Literal string
(e)	(e)		Grouping
e?	-e	greedy_option	Optional
e*	*e	kleen_star	Zero-or-more
e+	+e	kleen_plus	One-or-more
&e	&e	and_predicate	And-predicate
!e	!e	not_predicate	Not-predicate
e1 e2	e1 > e2	sequence	Sequence
e1 / e2	e1 / e2	alternative	Prioritized choice
e >= action or e % action	action	Semantic action