zefria:

On Sun, Apr 27, 2008 at 1:02 PM, Don Stewart wrote:

...

GHC supports unicode internally, and String and Char are all unicode.

To do unicode IO however, you need to use the utf8-string package:

http://hackage.haskell.org/cgi-bin/hackage-scripts/package/utf8-string

Just import and use IO functions from System.IO.UTF8, and that's it!

crap... I was hoping for a switch or something.

The program is supposed to be an interpreter that includes unicode IO support, and I wanted to use readline or editline or similar for it. Is there any library you know of that would have that kind of an ability while still using unicode? Between readline and unicode, unicode is the more important, but a readline ability would still be very nice.

Ian Lynagh wrote a pure haskell readline implementation a while ago, that would be trivial to change to use System.IO.UTF8.getLine -- or you could write your own (basic history/readline editing is fairly simple). -- Don

Hello Ian, Sunday, April 27, 2008, 11:39:03 PM, you wrote:

...

Ian Lynagh wrote a pure haskell readline implementation a while ago,

I think that was Malcolm Wallace.

it may become even more interesting if Malcolm thinks that it was Don :)) -- Best regards, Bulat mailto:Bulat.Ziganshin@gmail.com

On Sun, 2008-04-27 at 21:44 +0100, Malcolm Wallace wrote:

...

...

Ian Lynagh wrote a pure haskell readline implementation a while ago,

I think that was Malcolm Wallace.

... and it is part of the readline package! See System.Console.SimpleLineEditor. Needless to say, it is far from perfect, but does give some basic facilities. There are lots of ways it could be extended.

(I haven't checked, but I really hope the cabal mechanisms for configuring the readline package do not require a working actual- readline installation, because SimpleLineEditor is explicitly designed to workaround its absence! It is supposed to provide a uniform interface regardless of whether readline is there.)

It's certainly possible though from a quick look at the .cabal description and configure.ac script it's not quite clear if it'll do what you want. Duncan

zefria:

ah ha, yes. I seem to have found it here: http://www.haskell.org/pipermail/glasgow-haskell-bugs/2001-April/000401.html

I'll use this as a base. Many thanks to the both of you. I'll be sure to submit it to Hackage for others to enjoy if I end up adding some capability to it.

yeah, a pure unicode-readline would be an awesome contribution! -- Don

John Goerzen wrote:

That's a wonderful interface, but unfortunately it appears to assume that your Unicode I/O is always UTF-8, and never UTF-16. I happen to deal with more UTF-16 data than UTF-8 over here at the moment.

http://hackage.haskell.org/cgi-bin/hackage-scripts/package/encoding seems to have UTF-16.

On Wed April 30 2008 11:30:05 am Brandon S. Allbery KF8NH wrote:

On Apr 29, 2008, at 7:19 PM, Albert Y. C. Lai wrote:

...

John Goerzen wrote:

...

That's a wonderful interface, but unfortunately it appears to assume that your Unicode I/O is always UTF-8, and never UTF-16. I happen to deal with more UTF-16 data than UTF-8 over here at the moment.

http://hackage.haskell.org/cgi-bin/hackage-scripts/package/encoding seems to have UTF-16.

Just as a comment on the original comment: maybe it's just an unfortunate choice of phrasing, but is it really *that* surprising that a package called "utf8-string" assumes UTF-8 encoding?

Nope, never said it was. I was just pointing out that the OP (IIRC) asked for Unicode in general, and didn't specify UTF-8 specifically... and that UTF-8 is just part of that bigger picture.

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