You can search for identifiers within the package.
in-package search v0.2.0
type 'a parser
val pure : 'a -> 'a parser
val (<$>) : ('a -> 'b) -> 'a parser -> 'b parser
val (<*>) : ('a -> 'b) parser -> 'a parser -> 'b parser
val (<*) : 'a parser -> 'b parser -> 'a parser
val (*>) : 'a parser -> 'b parser -> 'b parser
val (<|>) : 'a parser -> 'a parser -> 'a parser
val do_parse : 'a parser -> string -> 'a option
val (-->) : string -> 'a parser -> ('a * string) option
val (<--) : 'a parser -> string -> ('a * string) option
val many : 'a parser -> 'a list parser
val some : 'a parser -> 'a list parser
val check : (char -> bool) -> char parser
val (~~) : (string -> ('a * string) option) -> 'a parser