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
result	return	return	always
fail	fail	fail	never
fail-unexpected	unexpected	unexpected
expecting	<?>, label	<?>, expect
bind	>>=	>>=	bind
for	do	bind	let->>
after	>>	>>	>>, nxt
value	fmap	<$>
maybe	try	<:>	attempt
look-ahead	lookAhead	look-ahead	lookahead
not-followed-by	notFollowedBy	not-followed-by
many0	many	many	many
many1	many1	many1	many1
skip0	skipMany	skip-many
skip1	skipMany1	skip-many1
token	token, satisfy	satisfy	token
token-not
word	tokens, string	token*	string
any-token	anyToken,anyChar	any-char	any-char
eof	eof	eof	eof
group	<*>	<*>
choice	<|>, choice	<|>	choice
option	option, optional	option, optional
between	between	between	between
times	count	times	times
many-till	manyTill	many-till
sep0	sepBy	sep-by
sep1	sepBy1	sep-by1
sep0-end	endBy	end-by
sep1-end	endBy1	end-by1
sep0-opt	sepEndBy	sep-end-by
sep1-opt	sepEndBy1	sep-end-by1
chain0-left	chainl	chainl
chain1-left	chainl1	chainl1
chain0-right	chainr	chainr
chain1-right	chainr1	chainr1
get-state	getParserState...	input, pos, user state
set-state	setParserState...	input, pos, user state
update-state	updateParserState...	user state
trace	parserTrace, parserTraced
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.