Re: [Haskell-cafe] Instances of `IsString`.

[Brandon S. Allbery KF8NH]

On Dec 20, 2009, at 17:09 , Jason Dusek wrote:
> A quick check on Hayoo! and in my interpreter shows that
> there are basically no instances of `IsString`. Is it
> really so little used?

The only 2 instances I'm aware of are String and lazy and strict
ByteStrings. It's not clear to me that there need to be any more
(well, maybe the packed Unicode string package on hackage).

--
brandon s. allbery [solaris,freebsd,perl,pugs,haskell] all...@kf8nh.com
system administrator [openafs,heimdal,too many hats] all...@ece.cmu.edu
electrical and computer engineering, carnegie mellon university KF8NH

[Neil Mitchell]

Hi Jason,

I believe the original purpose of IsString was to enable writing of
DSL's, much like described in this paper:
http://portal.acm.org/citation.cfm?id=1411236

As such, you might find far more uses of IsString inside DSL's, some
of which are likely to remain private. It was never designed to be a
feature for every day use, but if you need it (as you do for Paradise)
then it's hard to live without.

Thanks, Neil

On Sun, Dec 20, 2009 at 10:39 PM, Jason Dusek <jason...@gmail.com> wrote:
> 2009/12/20 Brandon S. Allbery KF8NH <all...@ece.cmu.edu>:

>> On Dec 20, 2009, at 17:09 , Jason Dusek wrote:
>> >
>> >�A quick check on Hayoo! and in my interpreter shows that
>> >�there are basically no instances of `IsString`. Is it
>> >�really so little used?
>>
>>
>> The only 2 instances I'm aware of are String and lazy and strict
>> ByteStrings. �It's not clear to me that there need to be any more (well,
>> maybe the packed Unicode string package on hackage).
>

> �It could be easily abused, that is for sure.
>
> --
> Jason Dusek
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[Bas van Dijk]

On Sun, Dec 20, 2009 at 11:09 PM, Jason Dusek <jason...@gmail.com> wrote:
> �A quick check on Hayoo! and in my interpreter shows that
> �there are basically no instances of `IsString`. Is it
> �really so little used?

I use it in my little dstring library:

http://hackage.haskell.org/package/dstring-0.3.0.1

Bas