The transformers package

[Tags:bsd3, library]

A portable library of functor and monad transformers, inspired by the paper "Functional Programming with Overloading and Higher-Order Polymorphism", by Mark P Jones, in Advanced School of Functional Programming, 1995 (

This package contains:

It can be used on its own in portable Haskell code, or with the monad classes in the mtl or monads-tf packages, which automatically lift operations introduced by monad transformers through other transformers.


Versions,,,,,,,,,,,,,,,,,,,, (info)
Dependencies base (>=1.0 && <4.8), special-functors (==1.0.*) [details]
License BSD3
Author Andy Gill, Ross Paterson
Maintainer Ross Paterson <>
Stability Unknown
Category Control
Source repository head: darcs get
Uploaded Thu Mar 22 16:00:43 UTC 2012 by RossPaterson
Updated Thu Dec 4 13:58:19 UTC 2014 by HerbertValerioRiedel to revision 1
Distributions Arch:, Debian:, Fedora:, LTSHaskell:, NixOS:, Stackage:
Downloads 223791 total (123 in the last 30 days)
2 []
Status Docs uploaded by user
Build status unknown [no reports yet]




applicativeinbaseUse the current base package, including Applicative and other Functor classes.EnabledAutomatic

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