package ppx_meta_conv

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  1. Result monad
Result monad
type ('a, 'error) t = ('a, 'error) result

monadic ops

val bind : ('a, 'error) t -> ('a -> ('b, 'error) t) -> ('b, 'error) t
val (>>=) : ('a, 'error) t -> ('a -> ('b, 'error) t) -> ('b, 'error) t
val fmap : ('a -> 'b) -> ('a, 'error) t -> ('b, 'error) t
val (>>|) : ('a, 'error) t -> ('a -> 'b) -> ('b, 'error) t

Same as fmap but as a binop

val map : ('a -> ('b, 'error) t) -> 'a list -> ('b list, 'error) t
val mapi : (int -> 'a -> ('b, 'error) t) -> 'a list -> ('b list, 'error) t
val fail : 'error -> ('a, 'error) t
val catch : (fail:('error -> 'exn) -> 'a) -> ('a, 'error) t
val catch_exn : (unit -> 'a) -> ('a, exn) t
val result : ('a -> 'b) -> ('error -> 'b) -> ('a, 'error) t -> 'b

same as Haskell's either

module Open : sig ... end