Hi,
It seems that from GHC 7.4, the prohibition on implicit parameter
constraints in instance declarations has been relaxed. The program below
gives the error Illegal constraint ?fooRev::Bool in GHC 7.2.1 but
loads fine in GHC 7.4.2 and GHC 7.6.2.
I can't spot anything about this in the release
-haskell-users-
| boun...@haskell.org] On Behalf Of Ganesh Sittampalam
| Sent: 16 July 2013 07:21
| To: glasgow-haskell-users@haskell.org
| Subject: implicit params in instance contexts
|
| Hi,
|
| It seems that from GHC 7.4, the prohibition on implicit parameter
| constraints in instance declarations
On Mon, Jul 15, 2013 at 11:21 PM, Ganesh Sittampalam gan...@earth.li wrote:
Hi,
It seems that from GHC 7.4, the prohibition on implicit parameter
constraints in instance declarations has been relaxed. The program below
gives the error Illegal constraint ?fooRev::Bool in GHC 7.2.1 but
loads
GHC ticket:
http://ghc.haskell.org/trac/ghc/ticket/7624
2013/7/16 Ganesh Sittampalam gan...@earth.li
Hi,
It seems that from GHC 7.4, the prohibition on implicit parameter
constraints in instance declarations has been relaxed. The program below
gives the error Illegal constraint