数据类型声明中的多个声明错误

Question

I'm currently building aa Twitter CLI client in Haskell, and I have a data type that represents a DM and one that represents a tweet. However, I get a multiple declaration error because I have to use the same name for both:

data Users =  Users { screen_name :: String } deriving(Show, Generic)


data Tweet = Tweet { text :: !Text,
                     retweeted :: Bool,
                     user :: Users
                   } deriving (Show, Generic)

data DM = DM { text :: !Text,
               sender_screen_name :: String
             } deriving (Show, Generic)

Does someone know a solution for this particular problem?

Answer 1

As defined here , the named members are just functions that are used to call the values in your data structure.

So, if you really want to use them, you can do so by using the language extension. You can do that by declaring this in your file:

{-# LANGUAGE DuplicateRecordFields #-}