Module Stdlib.Fun

module Fun: Fun

val id : 'a -> 'a

id is the identity function. For any argument x, id x is x.

val const : 'a -> 'b -> 'a

const c is a function that always returns the value c. For any argument x, (const c) x is c.

val flip : ('a -> 'b -> 'c) -> 'b -> 'a -> 'c

flip f reverses the argument order of the binary function f. For any arguments x and y, (flip f) x y is f y x.

val negate : ('a -> bool) -> 'a -> bool

negate p is the negation of the predicate function p. For any argument x, (negate p) x is not (p x).