It's first time I use TH. It would be nice to point out the motivations for
using it.
If everything TH does is doable without it, the point of using it is write
less code, eliminating some necessary and automatically computable code.
But I guess there is some more .
paolino
2010/11/2 Antoine
Well, Template Haskell is what you go to when what you want -can't- be
reasonably expressed with standard GHC Haskell. It's something of a
last resort (at least in my case). Typeclass synonyms can be faked
reasonably well with UndecidableInstances, but if you want to, for
example, automatically
Hello.
I'd like to have a template haskell function that take some constraints and
a class name and write an empty class from those and relative empty instance
to simulate typeclass synonyms.
As I've never written TH and couldn't find a easily adaptable code around, I
ask here for the code, or
On 1 November 2010 17:53, Paolino paolo.verone...@gmail.com wrote:
I'd like to have a template haskell function that take some constraints and
a class name and write an empty class from those and relative empty instance
to simulate typeclass synonyms.
As I've never written TH and couldn't
On Mon, Nov 1, 2010 at 6:09 PM, Christopher Done
chrisd...@googlemail.com wrote:
On 1 November 2010 17:53, Paolino paolo.verone...@gmail.com wrote:
I'd like to have a template haskell function that take some constraints and
a class name and write an empty class from those and relative empty
Thanks. I annotated the function
http://hpaste.org/paste/41035/test_simpleclasssynonym
It seems to produce the right code.
How should I use the Parents synonym in my functions?
This is a noob question I suppose.
paolino
2010/11/1 Gábor Lehel illiss...@gmail.com
On Mon, Nov 1, 2010 at 6:09
I think I've got something nice in the end.
http://hpaste.org/41042/classsynonymhs
example:
class (ParteDi (Servizio a) s
,Read a
,Eq a
, Show a
, Integer `ParteDi` s
) = SClass s a
$(classSynonym ''SClass)
ghci :i SClass command is
2010/11/1 Paolino paolo.verone...@gmail.com:
I think I've got something nice in the end.
http://hpaste.org/41042/classsynonymhs
example:
class ( ParteDi (Servizio a) s
, Read a
, Eq a
, Show a
, Integer `ParteDi` s
) ⇒ SClass s
