Author: Miguel Mitrofanov
Build-Type: Simple
Cabal-Version: >=1.2.3
Category: Monads
Description: A version of monad transformers that (a) allows one to convince the type checker that transformer application is a monad, and (b) doesn't need lots of boilerplate to add a new transformer. It's supposed to play nicely with @Control.Monad.Trans@.
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In order to make a new transformer (say, @T@) an instance of @TransM@ (@TransP@, @TransF@) class, all you have to do is:
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* define @instance MonadTrans T@ — which you've probably done already
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* define @instance Monad m => Monad (T m)@ — also something quite common (for @TransP@ and @TransF@ you'd need another instance for @MonadPlus@ and @MonadFix@, respectively).
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* write @instance Trans T where transMInst = instM@ — which is exactly one line of boilerplate. Sorry about that.
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After that, you can use your new and shiny transformer in compositions, like @ReaderT Char :. T :. WriterT String@ — and such a composition would automagically become a monad transformer.
License: BSD3
License-file: LICENSE
Maintainer: miguelimo38@yandex.ru
Name: compose-trans
Synopsis: Composable monad transformers
Version: 0.1
Library
Build-Depends: base >= 2 && < 5, mtl
Exposed-Modules: Control.Monad.Trans.Category, Control.Monad.Trans.Monad, Control.Monad.Trans.MonadFix, Control.Monad.Trans.MonadPlus
Extensions: GeneralizedNewtypeDeriving, RankNTypes, StandaloneDeriving, TypeOperators
GHC-Options: -Wall -fno-warn-orphans
Hs-Source-Dirs: src