[Template-haskell] example of derive using Template Haskell?

[Sean Seefried]

On 14/01/2005, at 2:53 PM, S. Alexander Jacobson wrote:

> Uhm.  Ok, so I guess the question is then...
> What is acceptable in 6.2 or is 6.4 coming out soon?
>
>

It should be quite possible to write a version that works for 6.2 
though with fairly minor changes. The main difference is that 6.3 uses 
an abstract data type for names (of variables etc) whereas 6.2 just 
uses strings.

I realise that building GHC 6.3 is a daunting task. Is that why you are 
reticent to use it? Is it for lack of availability? If you don't wish 
to build GHC 6.3 then I suggest at least downloading the source and 
checking out the libraries/template-haskell/Language/Haskell/TH 
directory. Compare this with the 6.2 Language.Haskell.TH library and it 
should be quite clear what changes you need to make.

I'd be quite happy for you to direct any questions you had to me.

Sean