[Haskell-cafe] Need Control.Monad.State

[Ivan Miljenovic]

On 28 July 2010 13:03, michael rice <nowgate at yahoo.com> wrote:
>
> [michael at localhost ~]$ ghc-pkg list mtl
> /usr/lib/ghc-6.12.1/package.conf.d
> [michael at localhost ~]$
>
> Installed?

No; if it was installed it would specify a version.

>
> Michael
>
> --- On Tue, 7/27/10, Ivan Miljenovic <ivan.miljenovic at gmail.com> wrote:
>
> From: Ivan Miljenovic <ivan.miljenovic at gmail.com>
> Subject: Re: [Haskell-cafe] Need Control.Monad.State
> To: "michael rice" <nowgate at yahoo.com>
> Cc: haskell-cafe at haskell.org
> Date: Tuesday, July 27, 2010, 10:51 PM
>
> On 28 July 2010 12:39, michael rice <nowgate at yahoo.com> wrote:
> >
> > How do I import Control.Monad.State?
>
> Install and use the mtl library (comes with the Haskell platform),
> monads-fd (almost identical API to mtl; the point of this is that mtl
> uses some extension: the non-extension bits are in the transformers
> library and monads-fd extends transformers by using extensions to
> implement mtl functionality) or monads-tf (a different approach to
> what monads-fd does using different extensions).
>
> To check if you have mtl installed (substitute the other package names
> if necessary):
>
> ghc-pkg list mtl
>
> 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
>



--
Ivan Lazar Miljenovic
Ivan.Miljenovic at gmail.com
IvanMiljenovic.wordpress.com