On Tue, Jul 21, 2009 at 5:30 PM, Christian Klauser<ch27...@gmail.com> wrote:
> Hi, I'm in the process of learning haskell and came across this problem:
>
> Using `Glasgow Haskell Compiler, Version 6.10.4, for Haskell 98, stage 2
> booted by GHC version 6.10.1`
>
> Common beginning of the file
> ============================
> {-# LANGUAGE FlexibleContexts #-}
>
> module UPSO where
>
> import Control.Monad(forM,forM_)
> import Control.Monad.ST.Lazy (ST,runST)
This works if I replace Control.Monad.ST.Strict instead of
Control.Monad.ST.Lazy.
The problem is that the MArray instances are declared for the strict
ST monad; there appear to be no corresponding instances for the lazy
ST monad.
--
Dave Menendez <d...@zednenem.com>
<http://www.eyrie.org/~zednenem/>
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