transformers-compat: A small compatibility shim for the transformers library

[ bsd3, compatibility, library ] [ Propose Tags ]

This package includes backported versions of types that were added to transformers in transformers 0.3, 0.4, and 0.5 for users who need strict transformers 0.2 or 0.3 compatibility to run on old versions of the platform, but also need those types.

Those users should be able to just depend on transformers >= 0.2 and transformers-compat >= 0.3.

Note: missing methods are not supplied, but this at least permits the types to be used.


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Flags

Manual Flags

NameDescriptionDefault
mtl
  • f-mtl Disables support for mtl for transformers 0.2 and 0.3. That is an unsupported configuration, and results in missing instances for ExceptT.

Enabled
generic-deriving
  • f-generic-deriving prevents generic-deriving from being built as a dependency. This disables certain aspects of generics for older versions of GHC. In particular, Generic(1) instances will not be backported prior to GHC 7.2, and generic operations over unlifted types will not be backported prior to GHC 8.0. This is an unsupported configuration.

Enabled
Automatic Flags
NameDescriptionDefault
two

Use transformers 0.2. This will be selected by cabal picking the appropriate version.

Disabled
three

Use transformers 0.3. This will be selected by cabal picking the appropriate version.

Disabled
four

Use transformers 0.4. This will be selected by cabal picking the appropriate version.

Disabled
five

Use transformers 0.5 up until (but not including) 0.5.3. This will be selected by cabal picking the appropriate version.

Disabled
five-three

Use transformers 0.5.3. This will be selected by cabal picking the appropriate version.

Enabled

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

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For package maintainers and hackage trustees

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Versions [RSS] 0.1, 0.1.1, 0.1.1.1, 0.2, 0.3, 0.3.2, 0.3.3, 0.3.3.2, 0.3.3.3, 0.3.3.4, 0.4.0.2, 0.4.0.3, 0.4.0.4, 0.5.0.2, 0.5.0.3, 0.5.0.4, 0.5.1.2, 0.5.1.3, 0.5.1.4, 0.6.0.2, 0.6.0.3, 0.6.0.4, 0.6.0.5, 0.6.0.6, 0.6.1.2, 0.6.1.3, 0.6.1.4, 0.6.1.5, 0.6.1.6, 0.6.2, 0.6.3, 0.6.4, 0.6.5, 0.6.6, 0.7, 0.7.1, 0.7.2 (info)
Change log CHANGELOG.markdown
Dependencies base (>=4.3 && <5), fail (>=4.9 && <4.10), generic-deriving (>=1.10 && <2), ghc-prim, mtl (>=2.0 && <2.2), transformers (>=0.2 && <0.4 || >=0.4.1 && <0.7) [details]
License BSD-3-Clause
Copyright Copyright (C) 2012-2015 Edward A. Kmett
Author Edward A. Kmett
Maintainer Edward A. Kmett <ekmett@gmail.com>
Category Compatibility
Home page http://github.com/ekmett/transformers-compat/
Bug tracker http://github.com/ekmett/transformers-compat/issues
Source repo head: git clone git://github.com/ekmett/transformers-compat.git
Uploaded by ryanglscott at 2022-06-26T13:13:51Z
Distributions Arch:0.7.2, Debian:0.6.5, Fedora:0.6.6, FreeBSD:0.4.0.4, LTSHaskell:0.7.2, NixOS:0.6.6, Stackage:0.7.2, openSUSE:0.7.1
Downloads 382342 total (494 in the last 30 days)
Rating 2.0 (votes: 1) [estimated by Bayesian average]
Your Rating
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Status Docs available [build log]
Last success reported on 2022-06-26 [all 1 reports]

Readme for transformers-compat-0.7.2

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transformers-compat

Hackage Build Status

This provides a thin compatibility shim on top of transformers-0.2 to add the types that were added in transformers-0.3.

This enables users to maintain haskell-platform compatibility, while still gaining access ot the new functionality.

The writer-cps-transformers package backports the Control.Monad.Trans.{RWS,Writer}.CPS modules that were introduced in transformers-0.5.6.0. There are also a variety of companion packages which backport orphan instances for these types. One example is writer-cps-mtl, which backports instances of type classes from the mtl library.

Contact Information

Contributions and bug reports are welcome!

Please feel free to contact me through github or on the #haskell IRC channel on irc.freenode.net.

-Edward Kmett