BSD-3-Clause licensed by Andy Gill
Maintained by
Edward KmettThis version can be pinned in stack with:mtl-2.2.2@sha256:1050fb71acd9f5d67da7d992583f5bd0eb14407b9dc7acc122af1b738b706ca3,2261
Module documentation for 2.2.2
Used by 512 packages in
nightly-2022-01-19(full list with versions):
adjunctions,
advent-of-code-api,
aeson-better-errors,
aeson-commit,
aeson-typescript,
Agda,
al,
algebra,
algebraic-graphs,
alternators,
ansi-terminal-game,
apecs,
api-maker,
app-settings,
asciidiagram,
autodocodec,
autodocodec-schema,
avro,
aws-lambda-haskell-runtime,
benchpress,
bencoding,
binary-parser,
binary-shared,
BiobaseBlast,
BiobaseENA,
BiobaseTypes,
BiobaseXNA,
bits,
blanks,
blaze-svg,
bloodhound,
BNFC,
boltzmann-samplers,
boomerang,
boots,
bower-json,
bson,
buffer-builder,
bytes,
bzlib-conduit,
and many more 2.2.2
Control.Monad.Identity now re-exports Control.Monad.Trans.Identity- Fix a bug in which
Control.Monad.State.Class.modify' was not as strict in
the new state as its counterparts in transformers
- Add a
MonadError () Maybe instance
- Add
liftEither :: MonadError e m => Either e a -> m a to
Control.Monad.Except{.Class}
- Add a
MonadWriter w ((,) w) instance (when built against base-4.9 or later)
2.2.1
- Provide MINIMAL pragmas for
MonadState, MonadWriter, MonadReader
- Added a cyclic definition of
ask in terms of reader for consistency with get/put vs. state and tell vs. writer
- Fix deprecation warnings caused by
transformers 0.4 deprecating ErrorT.
- Added
Control.Monad.Except in the style of the other mtl re-export modules
2.2.0.1
- Fixed a bug caused by the change in how
transformers 0.4 exports its data types. We will now export runFooT for each transformer again!
2.2
transformers 0.4 support- Added instances for
ExceptT
- Added
modify' to Control.Monad.State.*
2.1.3.1
- Avoid importing
Control.Monad.Instances on GHC 7.8 to build without deprecation warnings.
2.1.3
- Removed the now-irrelevant
Error constraint from the MonadError instance for Either e.
