A new version (0.8.0) of Idris 2 has been released. You can download the source (including generated Scheme and Racket files for bootstrapping) from the download page.

Highlights include:

• Autobind and Typebind modifier on operators allow the user to customise the syntax of operator to look more like a binder.
• Totality checking will now look under data constructors, so Just xs will be considered smaller than Just (x :: xs).
• Typst files can be compiled as Literate Idris.
• Constructors with certain tags (CONS, NIL, JUST, NOTHING) are replaced with _builtin.<TAG> (eg _builtin.CONS). This allows the identity optimisation to optimise conversions between list-shaped things.
• Refactored Uninhabited implementation for Data.List.Elem, Data.List1.Elem, Data.SnocList.Elem, and Data.Vect.Elem so it can be used for homogeneous (===) and heterogeneous (~=~) equality.
• The RefC backend compiler can emit precise reference counting instructions where a reference is dropped as soon as possible. This allows you to reuse unique variables and optimize memory consumption.
• Fix memory leaks of IORef in RefC backend. Now that IORef holds values by itself, global_IORef_Storage is no longer needed.
• The NodeJS executable output to build/exec/ now has its executable bit set. That file already had a NodeJS shebang at the top, so now it is fully ready to go after compilation.

For a detailed list of changes, see the CHANGELOG.

Thanks to the many people who have contributed, both old and new, whether by adding features, fixing code, reporting issues, or anything else. You can find a list of contributors in the GitHub repository.

Happy Hallowe'en! Have fun!