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type alias Either a b =
Mom (Result a b) b

A computation that may fail with additional information about the failure.

left : a -> Either a b

A failed computation.

right : b -> Either a b

A successful computation.

run : Either a b -> Result a b

Run the computation extracting the value to `Result a b`

.

```
module Mom.Either exposing (..)
{-|
@docs Either
@docs left, right, run
-}
import Mom exposing (..)
{-|
A computation that may fail with additional information about the failure.
-}
type alias Either a b =
Mom (Result a b) b
{-|
Run the computation extracting the value to `Result a b`.
-}
run : Either a b -> Result a b
run =
with Ok
{-|
A failed computation.
-}
left : a -> Either a b
left a =
Mom (\_ -> Err a)
{-|
A successful computation.
-}
right : b -> Either a b
right =
pure
```