On Wed, Mar 30, 2016 at 9:16 PM, Manuel M T Chakravarty <chak@justtesting.org> wrote:
Thank you for all the replies and especially pointing to this ticket.
I think, the discussion on this ticket is actually misleading and there is a simple solution, which I added as a comment.
That is in fact not simple at all: with that, the ostensibly pure `show` now depends on the user's locale and therefore should be in IO (and you cannot reliably feed it to `read` in a program running in a different locale)! This is why the ticket was concentrating on ghci, where it's at least somewhat reasonable to assume a UTF8 environment.