shapeless-2.2.4 is primarily a bugfix release, but includes two new
features (Split1
and WrappedOrphan
) to support type class derivation
for Cats. Expect to hear a lot more about this shortly …
Release notes follow …
This is the final release of shapeless-2.2.4.
shapeless-2.2.4 is primarily a bugfix release, but includes two new
features (Split1
and WrappedOrphan
) to support type class derivation
for Cats. Expect to hear a lot more about this shortly …
These release notes provide a summary of changes since shapeless 2.2.3. shapeless 2.2.4 is source and binary compatible with shapeless 2.2.0+ and should be binary compatible with shapeless-2.1.0 in most cases.
-
A
Split1
type class has been added allowing complex nested type constructors (ie.F[G[...]]
) to be decomposed (ie. asF[_]
,G[_]
) despite the limitations imposed by SI-2712. -
An additional mechanism for managing the implicit priority of orphan type class instances (
WrappedOrphan
) has been added. -
A number of bugs relating to
Generic
instances for types with non- trivial dependent prefixes or inaccessible constructors have been fixed (#369, #417, #418, #421 and #424). -
The
Witness
macro no longer attempts to produce singleton types for instances of values types (#379). -
An interaction between SI-5465 and
Lazy
which caused generation ofGeneric
instances of case-class-like types with an unapply method has been fixed (#422) -
shapeless master is now built with Scala 2.11.7.
-
Scala.js has been bumped to 0.6.4 and shapeless builds for Scala.js and Scala 2.11.7 and 2.12.0-M1 are now being published.
Many thanks everyone who has contributed ideas, enthusiasm and encouragement.