型

code:Elm

type alias MyInt = Int

別名付け

code:Elm

type Msg = A | B | C

Custom Type

旧名 Union Type

code:Elm

type Maybe a = Just a | Nothing

code:Elm

type Result err ok = Ok ok | Err err

複数

code:ELm

type alias Result ok = Result MyError ok

型変数を一個固定しつつalias

record

code:Elm

type alias User = { name : String }

recordをaliasする

exposing

(..)