Re: Haskell Platform Proposal: add transformers and revise the mtl package to depend on it

On Tue, Nov 02, 2010 at 02:10:36PM +0100, Johan Tibell wrote:

On Tue, Nov 2, 2010 at 1:45 PM, Ross Paterson wrote:

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On Mon, Oct 25, 2010 at 09:21:44AM +0100, Ross Paterson wrote:

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This has been up for over 5 weeks, with no dissent (except for a proposal to obsolete mtl in favour of monads-fd).

I think the next step would be to upload the tarball of mtl-2.0, which I propose to do soon.

I uploaded mtl-2.0.0.0 to hackage last week.

What is the next step on the HP side?  By my reading of the procedure, it needs action from the steering committee.

Wouldn't the next steps be to update all the libraries in the platform to use mtl-2?

The ones that depend on mtl are: cgi-3001.1.7.3 (latest version 3001.1.8.1) fgl-5.4.2.3 QuickCheck-2.1.1.1 (latest version 2.3.0.2) regex-base-0.93.2 regex-compat-0.93.1 regex-posix-0.94.2 HTTP-4000.0.9 (latest version 4000.0.10) Assuming the latest version of HTTP is included, they all build unchanged with mtl-2.0.0.0 except for cgi-3001.1.8.1. That requires a small change to line 58 of Network/CGI/Monad.hs: instance Monad m => Functor (CGIT m) where Changing Monad to Functor will get it working with mtl >= 2, or change Monad m to (Functor m, Monad m) to work with old and new versions of mtl.