Issues

• fmap for Strict StateT is too lazy

  haskell/transformers#130 · Filter by author meooow25 opened on Aug 30, 2026
  1

• Strictness testing of transformers

  enhancementgood first issuehelp wanted
  haskell/transformers#123 · Filter by author L0neGamer opened on Jun 10, 2026
  21

  

• Use rank 2 polymorphism for callCC

  haskell/transformers#100 · Filter by author sjshuck opened on Sep 13, 2025
  2

• Applicative methods of RWST are not all inlined

  good first issue
  haskell/transformers#98 · Filter by author sjshuck opened on Mar 17, 2024
  4

• Missed Specializations StateT WriterT

  haskell/transformers#96 · Filter by author sjshuck opened on Jan 26, 2024

• Offer stricter versions of AccumT

  haskell/transformers#91 · Filter by author sjshuck opened on Dec 8, 2022
  5

• ListT done right in transformers

  haskell/transformers#90 · Filter by author sjshuck opened on Oct 13, 2022
  4

• Add composition of MonadTransformers

  haskell/transformers#87 · Filter by author sjshuck opened on Dec 14, 2021
  7

• Add a kind synonym: MonadTransformer = (Type -> Type) -> (Type -> Type)

  haskell/transformers#22 · Filter by author sjshuck opened on Dec 14, 2021
  1

• Proposal: Add Elevator modifier to lift over transformers

  haskell/transformers#86 · Filter by author sjshuck opened on Dec 14, 2021
  2

• Proposal : ContT : minimal usage example of shift/reset

  haskell/transformers#85 · Filter by author sjshuck opened on Jul 16, 2021

• Proposal: ContT : add minimal usage example of delimited continuations

  haskell/transformers#21 · Filter by author sjshuck opened on Jul 16, 2021
  1

• Offer Eta* versions of function-represented ReaderT, StateT, etc. that use GHC.Exts.oneShot

  haskell/transformers#84 · Filter by author sjshuck opened on Feb 2, 2021
  3

• Alternative instance for ContT

  haskell/transformers#77 · Filter by author sjshuck opened on May 11, 2019
  14

• No access to the Writer.CPS internal representation

  haskell/transformers#17 · Filter by author sjshuck opened on Feb 11, 2019
  2

• Add exception handler newtype

  haskell/transformers#74 · Filter by author sjshuck opened on Jan 13, 2019
  2

• Add a lifted identity functor

  haskell/transformers#64 · Filter by author sjshuck opened on Mar 21, 2018
  3

• Add more documentation.

  documentation
  haskell/transformers#8 · Filter by author sjshuck opened on Aug 9, 2016
  1