[Haskell-cafe] How to input Unicode string in Haskell program?

[Semyon Kholodnov]

Imagine we have this simple program:

module Main(main) where

main = do
    x <- getLine
    putStrLn x

Now I want to run it somehow, enter "résumé 履歴書 резюме" and see this
string printed back as "résumé 履歴書 резюме". Now, the first problem is
that my computer runs Windows, which means that I can't use ghci
":main" or result of "ghc main.hs" to enter such an outrageous string
— Windows console is locked to one specific local code page, and no
codepage contains Latin-1, Cyrillic and Kanji symbols at the same
time.

But there is also WinGHCi. So I do ":main", copy-paste this string
into the window (It works! Because Windows has Unicode for 20 years
now), but the output is all messed up. In a rather curious way,
actually: the input string is converted to UTF-8 byte string, and its
bytes are treated as being characters from my local code page.

So, it appears that I have no way to enter Unicode strings into my
Haskell programs by hands, I should read them from files. That's sad,
and I refuse to think I am the first one with such a problem, so I
assume there is a solution/workaround. Now would someone please tell
me this solution? Except from "Just stick to 127 letters of ASCII", of
course.