레코드의 이름 충돌

• 다음과 같은 레코드가 있다.

Person = Person { firstName :: String
                     , lastName :: String 
                     , age :: Int
                     } deriving (Eq, Show, Read)
                     
data Human = Human {  firstName :: String 
                    , lastName :: String
                    , age :: Int
                   } deriving (eq, Show, Read) 

• 필드 레코드 처럼 표기하는 하스켈에서는 당연히 위처럼 하면 에러가 생긴다.

해결 방법

1. Control.Lens 를 쓰자

2. 아예 모듈을 나누자.

Name conflicts in Haskell records

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https://stackoverflow.com/questions/17478599/name-conflicts-in-haskell-records

Working around Haskell's namespace problem for records

Defining records in Haskell causes accessor functions for the record's fields to be defined. There is no seperate namespace for these accessor functions. Be able to use records in Haskell, which share field names. use lenses for accessing these fields use bindings in code with the same name as the record's fields avoiding any namespace clashes avoid overly verbose code and boilerplate as much as possible.

https://gist.github.com/mtesseract/1b69087b0aeeb6ddd7023ff05f7b7e68