[Haskell-cafe] Need Control.Monad.State
aditya siram
aditya.siram at gmail.com
Wed Jul 28 00:07:00 EDT 2010
I didn't realize the State monad wasn't part of the base install. Any
particular reason for this?
-deech
On Tue, Jul 27, 2010 at 10:24 PM, Ivan Miljenovic <ivan.miljenovic at gmail.com
> wrote:
> On 28 July 2010 13:17, michael rice <nowgate at yahoo.com> wrote:
> >
> > See below. Lot's of warnings. Is the install OK? If so, can I use the
> same *import*?
>
> Yeah, the install is OK. The meaning of the warnings are:
>
> * "Warning: -fallow-undecidable-instances is deprecated:" this GHC
> option has changed name, but the mtl package still uses the old name.
>
> * "Warning: Module `Prelude' is deprecated:" mtl doesn't specify any
> bounds on the version of the base library to be used (mainly because
> of historic reasons when it wasn't changing much and the Haskell
> community wasn't stressing versioning as much; note that the last
> version of mtl was released almost 2 years ago). Because a lot of
> packages broke when GHC-6.10.4 started shipping with base-4 (along
> with base-3 for compatability purposes) due to the differences in how
> exceptions were handled, if there is no upper bound on the version of
> base to be used then cabal-install plays it safe and uses base-3.
> However, the next version of GHC (6.14, which should be coming out
> later this year) will not ship with base-3, so GHC-6.12 included that
> warning message for people that kept trying to use base-3 that their
> code won't work with 6.14.
>
> So yes, now you can use "import Control.Monad.State".
>
> >
> > Michael
> >
> > --- On Tue, 7/27/10, Ivan Miljenovic <ivan.miljenovic at gmail.com> wrote:
> >
> > >
> > > If it isn't installed, you can use cabal-install to install it:
> > >
> > > cabal install mtl
> > >
> > > --
> > > Ivan Lazar Miljenovic
> > > Ivan.Miljenovic at gmail.com
> > > IvanMiljenovic.wordpress.com
> > >
> >
> >
> > [michael at localhost ~]$ cabal install mtl
> > Resolving dependencies...
> > Downloading mtl-1.1.0.2...
> > Configuring mtl-1.1.0.2...
> > Preprocessing library mtl-1.1.0.2...
> > Building mtl-1.1.0.2...
> > [ 1 of 21] Compiling Control.Monad.Identity ( Control/Monad/Identity.hs,
> dist/build/Control/Monad/Identity.o )
> >
> > Control/Monad/Cont.hs:1:11:
> > Warning: -fallow-undecidable-instances is deprecated: use
> -XUndecidableInstances or pragma {-# LANGUAGE UndecidableInstances #-}
> instead
> >
> > Control/Monad/Cont/Class.hs:1:11:
> > Warning: -fallow-undecidable-instances is deprecated: use
> -XUndecidableInstances or pragma {-# LANGUAGE UndecidableInstances #-}
> instead
> >
> > Control/Monad/Error.hs:1:11:
> > Warning: -fallow-undecidable-instances is deprecated: use
> -XUndecidableInstances or pragma {-# LANGUAGE UndecidableInstances #-}
> instead
> >
> > Control/Monad/Error/Class.hs:1:11:
> > Warning: -fallow-undecidable-instances is deprecated: use
> -XUndecidableInstances or pragma {-# LANGUAGE UndecidableInstances #-}
> instead
> >
> > Control/Monad/Identity.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> >
> > Control/Monad/List.hs:1:11:
> > Warning: -fallow-undecidable-instances is deprecated: use
> -XUndecidableInstances or pragma {-# LANGUAGE UndecidableInstances #-}
> instead
> >
> > Control/Monad/RWS/Lazy.hs:1:11:
> > Warning: -fallow-undecidable-instances is deprecated: use
> -XUndecidableInstances or pragma {-# LANGUAGE UndecidableInstances #-}
> instead
> >
> > Control/Monad/RWS/Strict.hs:1:11:
> > Warning: -fallow-undecidable-instances is deprecated: use
> -XUndecidableInstances or pragma {-# LANGUAGE UndecidableInstances #-}
> instead
> >
> > Control/Monad/Reader.hs:2:11:
> > Warning: -fallow-undecidable-instances is deprecated: use
> -XUndecidableInstances or pragma {-# LANGUAGE UndecidableInstances #-}
> instead
> >
> > Control/Monad/Reader/Class.hs:1:11:
> > Warning: -fallow-undecidable-instances is deprecated: use
> -XUndecidableInstances or pragma {-# LANGUAGE UndecidableInstances #-}
> instead
> >
> > Control/Monad/State/Lazy.hs:1:11:
> > Warning: -fallow-undecidable-instances is deprecated: use
> -XUndecidableInstances or pragma {-# LANGUAGE UndecidableInstances #-}
> instead
> >
> > Control/Monad/State/Strict.hs:1:11:
> > Warning: -fallow-undecidable-instances is deprecated: use
> -XUndecidableInstances or pragma {-# LANGUAGE UndecidableInstances #-}
> instead
> >
> > Control/Monad/Writer.hs:1:11:
> > Warning: -fallow-undecidable-instances is deprecated: use
> -XUndecidableInstances or pragma {-# LANGUAGE UndecidableInstances #-}
> instead
> >
> > Control/Monad/Writer/Class.hs:1:11:
> > Warning: -fallow-undecidable-instances is deprecated: use
> -XUndecidableInstances or pragma {-# LANGUAGE UndecidableInstances #-}
> instead
> >
> > Control/Monad/Writer/Lazy.hs:1:11:
> > Warning: -fallow-undecidable-instances is deprecated: use
> -XUndecidableInstances or pragma {-# LANGUAGE UndecidableInstances #-}
> instead
> >
> > Control/Monad/Writer/Strict.hs:1:11:
> > Warning: -fallow-undecidable-instances is deprecated: use
> -XUndecidableInstances or pragma {-# LANGUAGE UndecidableInstances #-}
> instead
> > [ 2 of 21] Compiling Control.Monad.Writer.Class (
> Control/Monad/Writer/Class.hs, dist/build/Control/Monad/Writer/Class.o )
> >
> > Control/Monad/Writer/Class.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> > [ 3 of 21] Compiling Control.Monad.Error.Class (
> Control/Monad/Error/Class.hs, dist/build/Control/Monad/Error/Class.o )
> >
> > Control/Monad/Error/Class.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> > [ 4 of 21] Compiling Control.Monad.State.Class (
> Control/Monad/State/Class.hs, dist/build/Control/Monad/State/Class.o )
> >
> > Control/Monad/State/Class.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> > [ 5 of 21] Compiling Control.Monad.Reader.Class (
> Control/Monad/Reader/Class.hs, dist/build/Control/Monad/Reader/Class.o )
> >
> > Control/Monad/Reader/Class.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> > [ 6 of 21] Compiling Control.Monad.RWS.Class (
> Control/Monad/RWS/Class.hs, dist/build/Control/Monad/RWS/Class.o )
> >
> > Control/Monad/RWS/Class.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> > [ 7 of 21] Compiling Control.Monad.Trans ( Control/Monad/Trans.hs,
> dist/build/Control/Monad/Trans.o )
> >
> > Control/Monad/Trans.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> >
> > Control/Monad/Trans.hs:26:0:
> > Warning: The import of `System.IO' is redundant
> > except perhaps to import instances from `System.IO'
> > To import instances alone, use: import System.IO()
> > [ 8 of 21] Compiling Control.Monad.Cont.Class (
> Control/Monad/Cont/Class.hs, dist/build/Control/Monad/Cont/Class.o )
> >
> > Control/Monad/Cont/Class.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> > [ 9 of 21] Compiling Control.Monad.Reader ( Control/Monad/Reader.hs,
> dist/build/Control/Monad/Reader.o )
> >
> > Control/Monad/Reader.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> > [10 of 21] Compiling Control.Monad.Error ( Control/Monad/Error.hs,
> dist/build/Control/Monad/Error.o )
> >
> > Control/Monad/Error.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> >
> > Control/Monad/Error.hs:57:0:
> > Warning: The import of `Control.Monad.Reader.Class' is redundant
> > except perhaps to import instances from
> `Control.Monad.Reader.Class'
> > To import instances alone, use: import
> Control.Monad.Reader.Class()
> >
> > Control/Monad/Error.hs:58:0:
> > Warning: The import of `Control.Monad.State.Class' is redundant
> > except perhaps to import instances from
> `Control.Monad.State.Class'
> > To import instances alone, use: import
> Control.Monad.State.Class()
> >
> > Control/Monad/Error.hs:60:0:
> > Warning: The import of `Control.Monad.Writer.Class' is redundant
> > except perhaps to import instances from
> `Control.Monad.Writer.Class'
> > To import instances alone, use: import
> Control.Monad.Writer.Class()
> >
> > Control/Monad/Error.hs:63:0:
> > Warning: The import of `System.IO' is redundant
> > except perhaps to import instances from `System.IO'
> > To import instances alone, use: import System.IO()
> > [11 of 21] Compiling Control.Monad.List ( Control/Monad/List.hs,
> dist/build/Control/Monad/List.o )
> >
> > Control/Monad/List.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> > [12 of 21] Compiling Control.Monad.RWS.Lazy ( Control/Monad/RWS/Lazy.hs,
> dist/build/Control/Monad/RWS/Lazy.o )
> >
> > Control/Monad/RWS/Lazy.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> >
> > Control/Monad/RWS/Lazy.hs:45:0:
> > Warning: The import of `Control.Monad.Reader.Class' is redundant
> > except perhaps to import instances from
> `Control.Monad.Reader.Class'
> > To import instances alone, use: import
> Control.Monad.Reader.Class()
> >
> > Control/Monad/RWS/Lazy.hs:46:0:
> > Warning: The import of `Control.Monad.State.Class' is redundant
> > except perhaps to import instances from
> `Control.Monad.State.Class'
> > To import instances alone, use: import
> Control.Monad.State.Class()
> >
> > Control/Monad/RWS/Lazy.hs:48:0:
> > Warning: The import of `Control.Monad.Writer.Class' is redundant
> > except perhaps to import instances from
> `Control.Monad.Writer.Class'
> > To import instances alone, use: import
> Control.Monad.Writer.Class()
> > [13 of 21] Compiling Control.Monad.RWS ( Control/Monad/RWS.hs,
> dist/build/Control/Monad/RWS.o )
> >
> > Control/Monad/RWS.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> > [14 of 21] Compiling Control.Monad.RWS.Strict (
> Control/Monad/RWS/Strict.hs, dist/build/Control/Monad/RWS/Strict.o )
> >
> > Control/Monad/RWS/Strict.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> >
> > Control/Monad/RWS/Strict.hs:45:0:
> > Warning: The import of `Control.Monad.Reader.Class' is redundant
> > except perhaps to import instances from
> `Control.Monad.Reader.Class'
> > To import instances alone, use: import
> Control.Monad.Reader.Class()
> >
> > Control/Monad/RWS/Strict.hs:46:0:
> > Warning: The import of `Control.Monad.State.Class' is redundant
> > except perhaps to import instances from
> `Control.Monad.State.Class'
> > To import instances alone, use: import
> Control.Monad.State.Class()
> >
> > Control/Monad/RWS/Strict.hs:48:0:
> > Warning: The import of `Control.Monad.Writer.Class' is redundant
> > except perhaps to import instances from
> `Control.Monad.Writer.Class'
> > To import instances alone, use: import
> Control.Monad.Writer.Class()
> > [15 of 21] Compiling Control.Monad.State.Lazy (
> Control/Monad/State/Lazy.hs, dist/build/Control/Monad/State/Lazy.o )
> >
> > Control/Monad/State/Lazy.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> > [16 of 21] Compiling Control.Monad.State ( Control/Monad/State.hs,
> dist/build/Control/Monad/State.o )
> >
> > Control/Monad/State.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> > [17 of 21] Compiling Control.Monad.State.Strict (
> Control/Monad/State/Strict.hs, dist/build/Control/Monad/State/Strict.o )
> >
> > Control/Monad/State/Strict.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> > [18 of 21] Compiling Control.Monad.Writer.Lazy (
> Control/Monad/Writer/Lazy.hs, dist/build/Control/Monad/Writer/Lazy.o )
> >
> > Control/Monad/Writer/Lazy.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> > [19 of 21] Compiling Control.Monad.Writer ( Control/Monad/Writer.hs,
> dist/build/Control/Monad/Writer.o )
> >
> > Control/Monad/Writer.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> > [20 of 21] Compiling Control.Monad.Writer.Strict (
> Control/Monad/Writer/Strict.hs, dist/build/Control/Monad/Writer/Strict.o )
> >
> > Control/Monad/Writer/Strict.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> > [21 of 21] Compiling Control.Monad.Cont ( Control/Monad/Cont.hs,
> dist/build/Control/Monad/Cont.o )
> >
> > Control/Monad/Cont.hs:1:0:
> > Warning: Module `Prelude' is deprecated:
> > You are using the old package `base' version 3.x.
> > Future GHC versions will not support base version 3.x. You
> > should update your code to use the new base version 4.x.
> > Registering mtl-1.1.0.2...
> > Installing library in /home/michael/.cabal/lib/mtl-1.1.0.2/ghc-6.12.1
> > Registering mtl-1.1.0.2...
> > [michael at localhost ~]$
> >
> >
>
>
>
> --
> Ivan Lazar Miljenovic
> Ivan.Miljenovic at gmail.com
> IvanMiljenovic.wordpress.com
> _______________________________________________
> Haskell-Cafe mailing list
> Haskell-Cafe at haskell.org
> http://www.haskell.org/mailman/listinfo/haskell-cafe
>
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