@hackage transformers-compat0.7.2

A small compatibility shim for the transformers library

  • Installation

  • Tested Compilers

  • Dependencies (5)

  • Dependents (96)

    @hackage/exception-transformers, @hackage/protolude, @hackage/invariant, @hackage/servant-server, @hackage/tagged, @hackage/comfort-array, Show all…

    • Package Flags

      two
       (off by default)

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

      three
       (off by default)

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

      four
       (off by default)

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

      five
       (off by default)

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

      five-three
       (on by default)

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

      mtl
       (on by default)

      • 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.

      generic-deriving
       (on by default)

      • 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.

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.