[Haskell-cafe] What is the state if Unicode in Haskell implementations?

Piotr Kalinowski pitkali at gmail.com
Mon Jul 31 08:07:13 EDT 2006

On 31/07/06, Olof Bjarnason <olof.bjarnason at gmail.com> wrote:

> 1) reading UTF-8 coded text files into unicode-enabled Strings, lets call
> them UString
> 2) writing UStrings to UTF-8 coded text files
> 3) using unicode strings in-code, that is in my .hs files

In case of GHC:

String (Char actually) is unicode enabled. The current stable version cannot
read UTF-8 encoded source files though (I've written a converter to
workaround it - it escapes the national characters). The development version
however is capable of reading UTF-8 encoded source files and does encode
read strings using unicode.

However - the IO is not aware of Unicode. So in order to do 1) and 2) you
have to
- read/write stream of bytes encoding text in UTF-8 from/to a file
- convert it to/from Unicode encoding.

The first one is just about reading/writing using normal IO operations. The
second can be done with the following module:


Note also that the same procedure would apply to simply printing/reading
to/from the screen.

Does that help?

Piotr Kalinowski

Intelligence is like a river: the deeper it is, the less noise it makes
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