package ppx_meta_conv

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  1. Result monad
Ppx based type_conv for various tree data formats

Install 

dune-project
 Dependency

gitlab.com Readme Edit opam file Versions (2)

Authors

  1. J
    Jun Furuse

Maintainers

  1. J
    jun.furuse@gmail.com

Sources

ppx_meta_conv-4.0.1.tar.bz2
sha256=0e9945064e1057e9dccf586434a399fba4251812d14fc51050b2cc5e76a47c2b
md5=536ea6b606a1217feccffac4609b5ece

doc/ppx_meta_conv.runtime/Meta_conv/Result/index.html

Module Meta_conv.Result

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