module Function:A 'pipe' operator.sig..end
val (|!) : 'a -> ('a -> 'b) -> 'bval const : 'a -> 'b -> 'aval non : ('a -> bool) -> 'a -> boolval forever : (unit -> unit) -> exnforever f runs f () until it throws an exception and returns the exception.
This function is useful for read_line loops, etc.val ident : 'a -> 'a