Module Base__.Fn

Various combinators for functions.

external (|>) : 'a ‑> ('a ‑> 'b) ‑> 'b = "%revapply"

A "pipe" operator.

val const : 'a ‑> _ ‑> 'a

Produces a function that just returns its first argument.

external ignore : _ ‑> unit = "%ignore"

ignore is the same as Pervasives.ignore. It is useful to have here so that code that rebinds ignore can still refer to Fn.ignore.

val non : ('a ‑> bool) ‑> 'a ‑> bool

Negates a function.

val forever : (unit ‑> unit) ‑> exn

forever f runs f () until it throws an exception and returns the exception. This function is useful for read_line loops, etc.

val apply_n_times : n:int ‑> ('a ‑> 'a) ‑> 'a ‑> 'a

apply_n_times ~n f x is the n-fold application of f to x.

external id : 'a ‑> 'a = "%identity"

The identity function. Also see Sys.opaque_identity.

val compose : ('b ‑> 'c) ‑> ('a ‑> 'b) ‑> 'a ‑> 'c

compose f g x is f (g x).

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

Reverses the order of arguments for a binary function.