haskell/mtl

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The Monad Transformer Library

Stars: 401
Forks: 72
Open beginner issues: 0
Indexed issues: 13

Dominant language: Haskell
License: No license data
Last GitHub push: Jun 8, 2026
Latest indexed: Sep 14, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

Open All

13 open issues indexed

Document what Strict and Lazy mean Open

2.3.3 docfix

haskell/mtl#2 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Missing laws Open

docfix enhancement

haskell/mtl#5 · 18 comments · 3 reactions · 1 assignee · Indexed Sep 14, 2026
Do not re-export anything from Control.Monad.Trans.Writer.Strict Open

transformers

haskell/mtl#29 · 2 comments · 5 reactions · 0 assignees · Indexed Sep 14, 2026
MonadReader instance for ContT has bad semantics Open

haskell/mtl#83 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Adding a proper ListT to transformers and this package Open

transformers

haskell/mtl#85 · 28 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
"Since" information for `MonadFail` instances missing (haddock, CHANGELOG) Open

2.3.3

haskell/mtl#105 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
mtl 3.0 planning Open

haskell/mtl#116 · 15 comments · 10 reactions · 0 assignees · Indexed Sep 14, 2026
Why not use rank 2 polymorphism for `callCC` Open

transformers

haskell/mtl#127 · 13 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
Conversions between lazy and strict StateT Open

transformers

haskell/mtl#139 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Add "Lifting" newtypes for DerivingVia Open

haskell/mtl#144 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Documentation Testing Open

haskell/mtl#155 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Add test suite and rehabilitate CI Open

2.3.3

haskell/mtl#160 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Add `MonadYield` Open

transformers

haskell/mtl#170 · 21 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026

haskell/mtl

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