[Haskell-cafe] System.IO but not with Data.String?

[Brent Yorgey]

There is also e.g. the Data.Text.IO module from the text package, for doing
file I/O and other such things with Text instead of String.

-Brent


On Thu, May 9, 2024 at 2:29 PM Hilco Wijbenga <hilco.wijbenga at gmail.com>
wrote:

> Hi all,
>
> We have Text and ByteString as alternatives to String but as soon as
> you want to do anything IO related (read a file, get a directory's
> content, et cetera) it seems your only option is to use String.
>
> For an occasional IO action, this is obviously irrelevant but for a
> compiler, a build system, or anything else that does a lot of IO this
> seems like it would be(come) an issue. So I was wondering what would
> be involved in adding (portable) support for System.IO with an
> alternative to String (this alternative does not necessarily need to
> be Text or ByteString).
>
> I did a little bit of research into how GHC handles this and there
> appear to be several other String types in the GHC tree, including
> ByteString(?). How feasible is an alternative System.IO API? How tied
> to GHC would such an alternative need to be? To be clear, I am not
> looking to _replace_ System.IO but to _add_ an alternative API (and
> not a wrapper that maps to/from String).
>
> Please do not assume I necessarily know what I am talking about!
> Especially, when it comes to the "portable" part. :-)
>
> Cheers,
> Hilco
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