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

14 Jan 2005

      On 14/01/2005, at 7:22 AM, S. Alexander Jacobson wrote:
...
This is really great.  Do you have an example of use of each of these 
functions?
e.g. do I do:
$(derive [Int,String,MyTime])
or
$(derive ["Int","String","MyTime"])
Oh dear, I've just realised a problem. This code only works with GHC 
6.3. Template Haskell has changed a lot since GHC 6.2.

What you should type is

$(derive [ ''Int, ''String, ''MyTime ])

The '' syntax means "get the name of this type". There is also a single 
quote syntax ' which means "get the name of this variable". This is new 
syntax introduced with Template Haskell.

Sean

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

Sean Seefried