You can search for identifiers within the package.
in-package search v0.2.0
val let+ : ('c, 'x, 'a) parser -> ('a -> 'b) -> ('c, 'x, 'b) parser
val and+ : ('c, 'x, 'a) parser -> ('c, 'x, 'b) parser -> ('c, 'x, 'a * 'b) parser
val and* : ('c, 'x, 'a) parser -> ('c, 'x, 'b) parser -> ('c, 'x, 'a * 'b) parser
val let* : ('c, 'x, 'a) parser -> ('a -> ('c, 'x, 'b) parser) -> ('c, 'x, 'b) parser