[web-devel] Type-safe URL handling

[Gregory Collins]

Jeremy Shaw <jeremy at n-heptane.com> writes:

> Happstack is currently mtl based. I think I like transformers better,
> though I am saddened to see they do not have the classes like
> MonadReader, MonadWriter, etc.

http://hackage.haskell.org/packages/archive/monads-fd/0.0.0.1/doc/html/Control-Monad-Reader-Class.html

Transformers is intended to be used with either "monads-fd" (to get
those instances using fundeps) or "monads-tf" (similar formulations with
type families.)

Monads-fd should be backwards-compatible w/ mtl.

G
-- 
Gregory Collins <greg at gregorycollins.net>