1.3.0-RC2

Flow improvements

• Operators for UI programming are reworked for the sake of consistency, naming scheme for operator overloads is introduced:

  • combineLatest is deprecated in the favor of combine.
  • combineTransform operator for non-trivial transformations (#1224).
  • Top-level combine and combineTransform overloads for multiple flows (#1262).
  • switchMap is deprecated. flatMapLatest, mapLatest and transformLatest are introduced instead (#1335).
  • collectLatest terminal operator (#1269).

• Improved cancellation support in flattenMerge (#1392).

• channelFlow cancellation does not leak to the parent (#1334).

• Fixed flow invariant enforcement for suspend fun main (#1421).

• delayEach and delayFlow are deprecated (#1429).

General changes

• Integration with Reactor context

  • Propagation of the coroutine context of await calls into Mono/Flux builder.
  • Publisher.asFlow propagates coroutine context from collect call to the Publisher.
  • New Flow.asFlux builder.

• ServiceLoader-code is adjusted to avoid I/O on the Main thread on newer (3.6.0+) Android toolchain.

• Stacktrace recovery support for minified builds on Android (#1416).

• Guava version in kotlinx-coroutines-guava updated to 28.0.

• setTimeout-based JS dispatcher for platforms where process is unavailable (#1404).

• Native, JS and common modules are added to kotlinx-coroutines-bom.

• Fixed bug with ignored acquiredPermits in Semaphore (#1423).