mtl-compat: Backported Control.Monad.Except module from mtl

[ bsd3, compatibility, library ] [ Propose Tags ]

This package backports the Control.Monad.Except module from mtl (if using mtl-2.2.0.1 or earlier), which reexports the ExceptT monad transformer and the MonadError class.

This package should only be used if there is a need to use the Control.Monad.Except module specifically. If you just want the mtl class instances for ExceptT, use transformers-compat instead, since mtl-compat does nothing but reexport the instances from that package.

Note that unlike how mtl-2.2 or later works, the Control.Monad.Except module defined in this package exports all of ExceptT's monad class instances. Therefore, you may have to declare import Control.Monad.Except () at the top of your file to get all of the ExceptT instances in scope.


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Versions 0.1, 0.1.1, 0.2.0.4, 0.2.1.1, 0.2.1.2, 0.2.1.3
Change log CHANGELOG.md
Dependencies base (>=4.3 && <5), mtl (>=2.2.1 && <2.3) [details]
License BSD-3-Clause
Copyright (C) 2015 Ryan Scott
Author Ryan Scott
Maintainer Ryan Scott <ryan.gl.scott@gmail.com>
Revised Revision 4 made by ryanglscott at Wed Mar 21 17:10:25 UTC 2018
Category Compatibility
Home page https://github.com/haskell-compat/mtl-compat
Bug tracker https://github.com/haskell-compat/mtl-compat/issues
Source repo head: git clone git://github.com/haskell-compat/mtl-compat.git
Uploaded by ryanglscott at Fri Feb 13 17:43:40 UTC 2015
Distributions Debian:0.2.1.3, LTSHaskell:0.2.1.3, NixOS:0.2.1.3, Stackage:0.2.1.3, openSUSE:0.2.1.3
Downloads 11374 total (118 in the last 30 days)
Rating 2.0 (votes: 1) [estimated by rule of succession]
Your Rating
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Status Docs not available [build log]
Last success reported on 2016-11-28 [all 8 reports]
Hackage Matrix CI

Modules

  • Control
    • Monad
      • Control.Monad.Except

Flags

NameDescriptionDefaultType
two-point-one

Use mtl-2.1.3.1 or earlier with transformers-compat. This will cause this package to export the Control.Monad.Except module.

DisabledManual
two-point-two

Use mtl-2.2.0.1 with transformers. This will cause this package to export the Control.Monad.Except module.

DisabledManual

Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info

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Maintainer's Corner

For package maintainers and hackage trustees


Readme for mtl-compat-0.2.1.3

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mtl-compat Hackage version Build Status

This package backports the Control.Monad.Except module from mtl (if using mtl-2.2.0.1 or earlier), which reexports the ExceptT monad transformer and the MonadError class.

This package should only be used if there is a need to use the Control.Monad.Except module specifically. If you just want mtl class instances for ExceptT, use transformers-compat instead, since mtl-compat does nothing but reexport the instances from that package.

Note that unlike how mtl-2.2 or later works, the Control.Monad.Except module defined in this package exports all of ExceptT's monad class instances. Therefore, you may have to declare import Control.Monad.Except () at the top of your file to get all of the ExceptT instances in scope.