Lenart was right.
I am sorry, indeed, toZ :: Integral a => a -> Z
toZ = toInteger
helps. I recalled, exactly this was the initial bug program.
But sorry, probably, i had confused something.
Still, why moving toZ = toInteger :: Integral a => a -> Z
to another module (Main.hs) changes the compilation success?
-----------------------------------------------------
module T1 where
type Z = Integer
toZ = toInteger :: Integral a => a -> Z
-----------------------------------------------------
module Main where
import List (genericTake)
import T1 (Z, toZ )
f :: Z -> Z -> [Z]
f n i = case toZ i of j -> genericTake (n+j) (repeat n)
main = let ns = f 2 3 in putStr (shows ns "\n")
-----------------------------------------------------------------
Also i used to read "probably...monomorphism restriction..." in ghc
report, and then to impove the code. This time, the report is not so
easy to understand:
Couldn't match `Int' against `Z'
Expected type: Int
Inferred type: Z
In the first argument of `toZ', namely `i'
In the scrutinee of a case expression: toZ i
------------------
Sergey Mechveliani
[EMAIL PROTECTED]
