[Template-haskell] TH type not Typeable?

Simon Peyton-Jones simonpj at microsoft.com
Fri Jun 10 04:06:33 EDT 2005


Perhaps someone can go ahead and add these instances to the TH types?
Ian?

that way it'll be in the next release, at least

Simon

| -----Original Message-----
| From: template-haskell-bounces at haskell.org
[mailto:template-haskell-bounces at haskell.org] On
| Behalf Of Sean Seefried
| Sent: 10 June 2005 04:02
| To: Abraham Egnor
| Cc: template-haskell at haskell.org
| Subject: Re: [Template-haskell] TH type not Typeable?
| 
| 
| On 10/06/2005, at 10:07 AM, Abraham Egnor wrote:
| 
| > I'd just like to pipe up and say that the lack of Typeable and Data
| > instances for the TH types has frustrated me as well.
| 
| Me too. But there's a solution. Check out the code that comes with
| the third paper in the "Scrap Your Boilerplate" series. There's a
| module in there called Derive.hs that contains code for deriving
| Typeable and Data instances using Template Haskell.  The cool thing
| is, you can use it *on* Template Haskell's data types too.
| 
| In fact, I did this in my PanTHeon project available from my web site
| at:
| 
| http://www.cse.unsw.edu.au/~sseefried/pantheon.html
| 
| However, this uses an older version of the deriving code. You'd
| probably want to get the latest.
| 
| Cheers,
| 
| Sean
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