CODEWITHSUNDEEP
windowshaskellutf-8
Ford O.
Ford O.

Reputation: 1498

Haskell, WinX: UTF8 stdin causes problems

I use windows 10 and powershell, it seems that Haskell have some issues with UTF encoding from stdin:

> chcp 65001
> stack ghci
...

> putStrLn "자"
자

> x <- getLine
자
> x
"\EOT"

> interact id
자
╝

Upvotes: 2

Views: 154

Answers (1)

Daniel Wagner
Daniel Wagner

Reputation: 153352

I suspect GHC is operating on a latin1 encoding (or similar), and putStrLn "자" only worked by accident. You can check this as follows:

> import System.IO
System.IO> hGetEncoding stdin

If this replies with UTF-8 my hypothesis is wrong. But if it replies with something other than UTF-8, you can explicitly declare which encoding the console is expecting with hSetEncoding:

System.IO> hSetEncoding stdin utf8

You may also want to do this for stdout and stderr. See the documentation for more details.

Upvotes: 1

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