Greetings, We are pleased to announce HList-0.3. This is an update the well-known library for strongly typed heterogenous lists, records, type-indexed products (TIP) and co-products. Some of the highlights are: * works with lens. See examples/labelable.hs * modern features such as TypeFamilies, DataKinds (Symbol), ConstraintKinds, PolyKinds, QuasiQuotes * Data instances for HList and Record. One application is given in examples/cmdargs.hs * named and optional function parameters (using Keyword or perhaps RecordPuns) are part of the library proper * additional functions including: HTranspose, HZip, HFoldl, HScanr, HReplicate * improved type inference. To give an example: > let y = hMap (Fun' read :: Fun' Read String) x This is about the same as `let y = map read x', but each element of the HList `y' can have a different type. Only one of the two lengths needs to be specified. * more documentation and examples, which should make it easier to find your way around. Refer to the included ChangeLog or `darcs changes` for more details. This release requires ghc>=7.6. You can get the release from http://hackage.haskell.org/package/HList or use cabal-install: $ cabal update $ cabal install HList-0.3 For now it seems that hackage is rejecting the upload due to language extensions it doesn't know about, so in the meantime you can get it with: $ cabal install http://code.haskell.org/~aavogt/HList/HList-0.3.0.tar.gz With haddocks at http://code.haskell.org/~aavogt/HList/docs/HList/. -- Adam