parsesso

Parser combinators for Clojure(Script).

Motivation

• Idiomatic and convenient API for parser combinators in Clojure and ClojureScript.

Inspiration

• haskell/parsec
• blancas/kern
• youngnh/parsatron
• rm-hull/jasentaa

Cheat sheet

Parsesso	Parsec1,2,3	Kern4	Parsatron5
p/result	return	return	always
p/fail	fail	fail	never
p/fail-unexpected	unexpected	unexpected
p/expecting	<?>, label	<?>, expect
p/bind	>>=	>>=	bind
p/for	do	bind	let->>
p/after	>>	>>	>>, nxt
p/value	fmap	<$>
p/maybe	try	<:>	attempt
p/look-ahead	lookAhead	look-ahead	lookahead
p/not-followed-by	notFollowedBy	not-followed-by
p/*many	many	many	many
p/+many	many1	many1	many1
p/*skip	skipMany	skip-many
p/+skip	skipMany1	skip-many1
p/token	token, satisfy	satisfy	token
p/token-not
p/word	tokens, string	token*	string
p/any-token	anyToken,anyChar	any-char	any-char
p/eof	eof	eof	eof
p/group	<*>	<*>
p/alt	<|>, choice	<|>	choice
p/option	option, optional	option, optional
p/between	between	between	between
p/times	count	times	times
p/*many-till	manyTill	many-till
p/*sep-by	sepBy	sep-by
p/+sep-by	sepBy1	sep-by1
p/*sep-end-by	endBy	end-by
p/+sep-end-by	endBy1	end-by1
p/*sep-opt-by	sepEndBy	sep-end-by
p/+sep-opt-by	sepEndBy1	sep-end-by1
p/get-state	getParserState...	input, pos, user state
p/set-state	setParserState...	input, pos, user state
p/update-state	updateParserState...	user state
p/trace	parserTrace, parserTraced
expr/*chain-left	chainl	chainl
expr/+chain-left	chainl1	chainl1
expr/*chain-right	chainr	chainr
expr/+chain-right	chainr1	chainr1
char/is	char, oneOf	sym*, one-of*	char
char/is-not	noneOf	none-of*
char/regex
char/upper?	upper	upper (unicode)
char/lower?	lower	lower (unicode)
char/letter?	letter	letter (unicode)	letter (unicode)
char/number?	digit	digit (unicode)	digit (unicode)
char/letter-or-number?	alphaNum	alpha-num (unicode)
char/white?	space	white-space (unicode)
char/newline	endOfLine	new-line*
char/str*		<+>

Examples

• HoneySQL SELECT

Performance

See some benchmarks here.