Hi
After installing ghc 6.10-rc, I have a program that no longer
compiles. I get the dreaded GADT pattern match error, instead :)
Here is a boiled-down example:
{-# OPTIONS_GHC -XGADTs -XEmptyDataDecls #-}
module T where
data S
data M
data Wit t where
S :: Wit S
M :: Wit M
Simon Marlow wrote:
Judah Jacobson wrote:
Once small thing I've noticed: UserInterrupt (ctr-c) exceptions are
not thrown in ghci, probably because it installs its own signal
handlers:
Prelude Control.Exception Control.Concurrent handle (\UserInterrupt
- putStrLn Caught!) (threadDelay 200)
Hello Thomas,
Tuesday, October 14, 2008, 2:46:45 PM, you wrote:
The issue is binary compatibility. At the moment, GHC cannot make
sure that a library compiled with an older GHC can work with a newer
GHC. GHC does many cross-module optimisations, and its runtime system
changes occasionally,
dgorin:
I've tried adding some signatures (together with -
XScopedTypeVariables), but with no luck. Why is it that this no longer
compiles? More importantly, how can I make it compile again? :)
If you work out how to make it compile, can you document the soln. here,
2008/10/14 Bulat Ziganshin [EMAIL PROTECTED]:
Hello Thomas,
Tuesday, October 14, 2008, 2:46:45 PM, you wrote:
The issue is binary compatibility. At the moment, GHC cannot make
sure that a library compiled with an older GHC can work with a newer
GHC. GHC does many cross-module
On Oct 14, 2008, at 7:48 PM, Don Stewart wrote:
dgorin:
I've tried adding some signatures (together with -
XScopedTypeVariables), but with no luck. Why is it that this no
longer
compiles? More importantly, how can I make it compile again? :)
If you work out how to make it compile, can
On Tue, Oct 14, 2008 at 7:27 AM, Daniel Gorín [EMAIL PROTECTED] wrote:
Hi
After installing ghc 6.10-rc, I have a program that no longer compiles. I
get the dreaded GADT pattern match error, instead :)
Here is a boiled-down example:
{-# OPTIONS_GHC -XGADTs -XEmptyDataDecls #-}
module
