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Changelog

Notable changes to this project are documented in this file. The format is based on Keep a Changelog and this project adheres to Semantic Versioning.

[Unreleased]

Breaking changes:

New features:

Bugfixes:

Other improvements:

v6.1.0 - 2024-06-26

New features:

  • Add MonadST instances for all monad transformers (#147 by @rhendric)
  • Add ComonadAsk, ComonadEnv, and ComonadTraced instances for StoreT, EnvT, and TracedT (#145 by @skeate)

v6.0.0 - 2022-04-27

Breaking changes:

  • Update project and deps to PureScript v0.15.0 (#142 by @JordanMartinez)
  • Drop deprecated MonadZero instance (#141 by @JordanMartinez)

New features:

  • Add Foldable, FoldableWithIndex, and Traversable instances for EnvT (#113 by @abaco)

Bugfixes:

Other improvements:

v5.2.0 - 2021-07-13

New features:

  • Add liftMaybe and liftEither to easily lift Maybe and Either values to a MonadThrow monad (#140 by @hexagonal-sun)

v5.1.0 - 2021-04-27

New features:

  • Export mapCont and withCont functions originally added in #70 by @parsonsmatt (#139 by @JordanMartinez)

Other improvements:

  • Fix warnings revealed by v0.14.1 PS release (#139 by @JordanMartinez)

v5.0.0 - 2021-02-26

Breaking changes:

  • Added support for PureScript 0.14 and dropped support for all previous versions (#133)
  • Replaced ComonadEnv constraint with ComonadAsk in the asks function (#131)

New features:

  • Added Semigroup and Monoid instances to ContT, ExceptT, MaybeT, RWST, StateT, WriterT (#115)
  • Added IdentityT (#121)

Bugfixes:

  • Added Semigroup and Monoid superclasses to MonadTell and MonadWriter, respectively, to enforce the type class laws (#126)

Other improvements:

  • Replaced void $ modify with modify_ in example code (#119)
  • Fixed documentation to use Effect instead of Eff (#124)
  • Fixed documentation for callCC (#132)
  • Migrated CI to GitHub Actions and updated installation instructions to use Spago (#134)
  • Added a changelog and pull request template (#136, #137)

v4.2.0 - 2019-02-03

  • Added MonadThrow and MonadError instances for Effect (@safareli)
  • Fixed a typo in documentation (@Thimoteus)

v4.1.0 - 2018-05-27

  • Added modify_ for the old-style modify

v4.0.0 - 2018-05-23

  • Updated for PureScript 0.12
  • The MonadState modify function now returns the modified state

v3.6.0 - 2018-04-07

  • Added ComonadStore instances for EnvT and TracedT (@colin-passiv)

v3.5.0 - 2017-11-23

  • Added Foldable and Traversable instances for EnvT (@cryogenian)

v3.4.0 - 2017-06-03

  • Added Monoid instance for ReaderT (@safareli)

v3.3.0 - 2017-05-25

  • Added the writer function

v3.2.0 - 2017-04-08

  • Added try for MonadError (@rightfold)

v3.1.0 - 2017-03-30

  • Added runListT, runListTRec and foldlRec (@matthewleon)

v3.0.0 - 2017-03-26

  • Updated for PureScript 0.11
  • The MonadError class has been split into MonadThrow and MonadError (@natefaubion)
  • Fixed export of ListT constructors (@matthewleon)

v2.3.0 - 2017-03-21

  • Lazy instance for RWST (@mlang)
  • Added withResource (@rightfold)

v2.2.0 - 2017-01-20

  • Added Alternative and Plus instances for RWST (@mlang)

v2.1.0 - 2017-01-03

  • Added Alt instance for RWST (@mlang)

v2.0.2 - 2016-11-09

  • Fixed name shadowing warnings in PureScript 0.10.2 (@clayrat)

v2.0.1 - 2016-10-11

  • Fixed overly-applied type synonyms for Cont, Except, and Store

v2.0.0 - 2016-10-10

This release features a number of breaking changes:

  • The signature for callCC is now rank-2 to allow for any result to be discarded #74 (@jqyu)
  • Functional dependencies have been added to all classes
  • Newtype instances have been derived for all transformers
  • ListT.scanl implementation has been fixed #72 (@DanielGronau)
  • MonadReader has been split into MonadAsk and MonadReader
  • MonadWriter has been split into MonadTell and MonadWriter
  • ComonadEnv has been split into ComonadAsk and ComonadEnv
  • MonadTrans class is now in Control.Monad.Trans.Class
  • ComonadTrans class is now in Control.Comonad.Trans.Class
  • ExceptT's apply and bind now behave consistently, at the cost of tightening the m constraint to Monad for the Apply and Applicative instance
  • The MonadRWS class has been removed

v1.0.0 - 2016-06-01

This release is intended for the PureScript 0.9.1 compiler and newer.

Note: The v1.0.0 tag is not meant to indicate the library is “finished”, the core libraries are all being bumped to this for the 0.9 compiler release so as to use semver more correctly.

  • Added Cont (@parsonsmatt)

v0.8.4 - 2015-11-19

  • Fixed issue with re-exports

v0.8.3 - 2015-11-19

  • Fixed import warnings raised in psc 0.7.6

v0.8.2 - 2015-11-01

Relax constraints for WriterT instances (@xuwei-k)

v0.8.1 - 2015-09-16

  • Fixed unused type variable warnings.

v0.8.0 - 2015-09-10

  • Added MonadRec instance for RWST. This changes some details of the RWST implementation so may be a breaking change. (@ethul)

v0.7.2 - 2015-09-03

  • Added more instances for ReaderT and RWST (@ethul)

v0.7.1 - 2015-08-25

This release requires the 0.7.4.0 release of the PureScript compiler. Previous versions of this library will not work with psc versions <= 0.7.3.0.

  • Simplified instance constraints.
  • Module reexports of Class modules.
  • More instances for ExceptT
  • ErrorT has been removed in favor of ExceptT.

v0.6.1 - 2015-07-03

  • Added Distributive instance for ReaderT (@freebroccolo)

v0.6.0 - 2015-06-30

This release works with versions 0.7.* of the PureScript compiler. It will not work with older versions. If you are using an older version, you should require an older, compatible version of this library.

  • Added MonadEff instances

v0.5.5 - 2015-04-17

  • Added ExceptT (@hdgarrood)

v0.5.4 - 2015-03-24

  • More documentation updates.

v0.5.3 - 2015-03-24

  • Updated docs

v0.5.2 - 2015-03-23

  • Added MonadError instance for Maybe (@pseudonom)

v0.5.1 - 2015-02-26

  • Fixed RWST Apply instance. (@joneshf)

v0.5.0 - 2015-02-21

This release requires PureScript v0.6.8 or later

  • Updated dependencies

v0.4.1 - 2015-02-19

  • Error constraint removed where possible (@pseudonom)

v0.4.0 - 2015-01-10

  • Updated purescript-identity dependency (@garyb)

v0.3.2 - 2014-12-16

  • Added execWriterT (@MichaelXavier)

v0.3.1 - 2014-12-11

  • Update array dependency (#25)

v0.3.0 - 2014-11-08

  • Updates for extracted Identity (@garyb)

v0.2.1 - 2014-09-04

  • Simplify superinstance constraints for ErrorT

v0.2.0 - 2014-09-03

v0.1.2 - 2014-08-31

  • Lazy1 instance for StateT (@paf31)

v0.1.1 - 2014-08-27

  • Comonad and Extend instances for Identity (@joneshf)

v0.1.0 - 2014-08-11

  • Add Alt, Plus, MonadPlus, update Alternative (@garyb)

v0.0.6 - 2014-08-05

  • All transformers are now defined as newtypes (@garyb)

v0.0.5 - 2014-08-02

  • Added Control.Monad.RWS and Control.Monad.RWST (@joneshf)
  • Updated FFI code to work for changes in codegen (@garyb)

v0.0.4 - 2014-06-24

  • Dropped unnecessary var from type synonyms to prevents problems with partially applied type synonyms later on (garyb)

v0.0.3 - 2014-06-14

  • Now uses "proper" Unit type instead of {} (garyb)

v0.0.2 - 2014-06-08

  • Now includes Control.Monad.Free (ethul)

v0.0.1 - 2014-05-25

  • Initial release