MTL vs Transformers. Any status update?

Ross Paterson ross at
Sat Nov 28 11:56:50 EST 2009

On Sat, Nov 28, 2009 at 04:40:49PM +0000, Duncan Coutts wrote:
> Could someone remind me why it's better for use to ask everyone to
> switch to monads-fd / transformers rather than to mtl-2? Does that make
> the transition easier?

The problem is that transformers and mtl use the same module names,
such as Control.Monad.Identity.  Unless one of these packages is hidden,
people using ghci or ghc --make will have problems.

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