Version 0.8.1.0 (2022-10-05)

• Bugfix for the GHC 9.2 (and below) rewriter plugin compatibility shim: fix coercion orientations.

Version 0.8.0.0 (2022-07-07)

• Compatibility for GHC 9.4.

• Change API for lookupImportedModule to use PkgQual and UnitId instead of Maybe FastString, with back-compatibility function pkgQual_pkg for use with older module lookup functions.

• Re-export splitAppTys and unpackFS.

Version 0.7.1.0 (2022-01-04)

• newWanted now always uses the CtLoc information that it is provided with, as opposed to obtaining some information from the monadic environment. This means you no longer need to wrap calls to newWanted in setCtLocM to ensure that GHC reports the correct source span when reporting unsolved Wanteds in error messages.

• Remove the newDerived function, as Derived constraints are going to be removed from GHC.

Version 0.7.0.0 (2021-12-31)

• Re-export functions for dealing with type-level literals, such as mkNumLitTy and isStrLitTy.

• Re-export functions for splitting apart type applications, such as splitAppTy_maybe and tyConAppTyCon_maybe.

• Redefine and re-export mkUncheckedIntExpr for GHC versions prior to 9.0.

• Re-export some basic types from GHC.Types.Basic such as Arity, PromotionFlag and Boxity.

• Re-export GHC.Builtin.Names and GHC.Builin.Types.Prim.

• Provide MonadThings instances for TcPluginM monads.

Version 0.6.1.0 (2021-12-13)

• Re-export various useful types and functions to deal with type and coercion variables.

• Re-export a few types and functions to deal with source locations.

• Remove some re-exports for constructing function types, as not all functions make sense across all GHC versions supported by the library.

• Re-export panic and pprPanic.

Version 0.6.0.0 (2021-12-13)

• Add support for GHC 8.8.

• Re-export evDataConApp, which is useful for constructing typeclass dictionaries.

Version 0.5.1.0 (2021-08-31)

• Fix a bug in the type-family rewriting compatibility layer (GHC 8.10, 9.0, 9.2) by correctly downgrading the coercion used to cast the evidence, when necessary.

Version 0.5.0.0 (2021-08-30)

• Re-export some additional types and functions that are useful for inspecting and constructing evidence terms, such as mkTyVar, newName, mkLocalId, lookupEvBind...

Version 0.4.1.0 (2021-08-24)

• Re-export a few GHC modules, such as GHC.Core.Make and GHC.Plugins. These re-exports might be changed to be more selective in the future to aid cross-version compatibility.

Version 0.4.0.0 (2021-08-24)

• Adapt to GHC 9.4 changes in the TcPluginSolveResult datatype: are now able to solve and emit constraints even when reporting a contradiction. This can help with error messages. Unfortunately these extra constraints will be dropped in versions of GHC prior to 9.4.

• Add a utility module for name resolution using constrained traversals.

• Add compatibility for GHC 8.10.

Version 0.3.1.0 (2021-08-09)

Ensure that the coercions stored in Reductions are always oriented left-to-right, by making the internal rewriting compatibility layer also use left-to-right coercions.

Version 0.3.0.0 (2021-08-04)

Account for changes in rewriting in GHC 9.4:

• rewriter plugins can no longer emit new Wanted constraints if they don't rewrite the type family application;
• coercions in the rewriter are now oriented left-to-right, requiring mkTyFamAppReduction to be adapted.

Version 0.2.0.0 (2021-07-22)

Initial release on Hackage.