Hi,
while experimenting with template haskell I encountered the following:
] ghc --make Main.hs
] Chasing modules from: Main.hs
] Skipping Power ( Power.hs, ./Power.o )
] Compiling Main ( Main.hs, ./Main.o )
] ghc-5.05: panic! (the `impossible' happened, GHC version 5.05):
] nameModule x {- v a1fV -}
]
] Please report it as a compiler bug to [EMAIL PROTECTED],
] or http://sourceforge.net/projects/ghc/.
]
]
] make: *** [main] Error 1
This was using a version very recently checked out of CVS (Friday, 14 March)
The files that caused the problem are attached.
--
Tom Harke
Computer Science and Engineering Department
Oregon Graduate Institute
Weiler's Law:
Nothing is impossible for the man who doesn't have to do it himself
{-# OPTIONS -fglasgow-exts -DTEMPLATE_HASKELL #-}
module Power
where
import Language.Haskell.THSyntax
power :: Int -> Expr -> Expr
power n =
\x ->
if n==0
then [| 1 |]
else [| $x * $(power (n-1) x) |]
{-# OPTIONS -fglasgow-exts -DTEMPLATE_HASKELL #-}
import Language.Haskell.THSyntax
import Power
main =
do
putStrLn
$ show
-- an attempt to abstract : $(power 2 [| 3 |] )
$ (\x -> $(power 2 [| x |] )) 3
