Vavr Files

The day has come - Vavr 0.11.0 is out, marking the first minor release in several years.

From here on, the focus shifts toward Vavr 1.0.0, starting with a significant Java version bump.

The 0.11.x line will continue to receive bugfixes and maintenance updates, but no new features are planned. Roadmap details can be found here.

Huge thanks to everyone who contributed in any form.

Significant Additions

Lazy For() Comprehension (https://github.com/vavr-io/vavr/pull/3085)

The for-comprehension API has been expanded with lazy, evaluation-friendly signatures that accept functions instead of eagerly-evaluated objects:

:::java
Option<Integer> result = API.For(
  calculate1(),
  (r1) -> calculate2(r1),
  (r1, r2) -> calculate3(r1, r2))
  .yield((r1, r2, r3) -> r1 + r2 + r3);

JSpecify Integration (https://github.com/vavr-io/vavr/pull/3113)

Vavr now integrates JSpecify annotations, enhancing null-safety support in IDEs and modern static analysis tools.

Better Future Cancellation (https://github.com/vavr-io/vavr/pull/3107)

As a result of internal refactoring, cancellation is now possible for Futures that have not yet started execution.

Various API Additions

• Either/Validation.cond()
• Value.mapTo(U) and Value.mapToVoid()
• Try.toEither(Throwable -> L)

What's Changed

• New feature: Either.cond by @adamkopec in https://github.com/vavr-io/vavr/pull/3061
• New feature: Validation.cond by @adamkopec in https://github.com/vavr-io/vavr/pull/3062
• New feature: For-comprehensions for Eithers and Validations by @adamkopec in https://github.com/vavr-io/vavr/pull/3063
• New feature: .mapTo(U) and .mapToVoid() for Value<T> by @adamkopec in https://github.com/vavr-io/vavr/pull/3086, https://github.com/vavr-io/vavr/pull/3090
• Lazy For() Comprehension Generator by @pivovarit in https://github.com/vavr-io/vavr/pull/3085
• New feature: Try.toEither(Throwable -> L) by @adamkopec in https://github.com/vavr-io/vavr/pull/3088
• Fix: Missing javadocs for types in For comprehensions by @adamkopec in https://github.com/vavr-io/vavr/pull/3089
• Fix: Missing javadocs for pattern matching and other components by @adamkopec in https://github.com/vavr-io/vavr/pull/3095
• Fix: flaky tests of set comparison by @lycoris106 in https://github.com/vavr-io/vavr/pull/3104
• Remove Future.Computation and streamline task execution/cancellation by @pivovarit in https://github.com/vavr-io/vavr/pull/3107
• Lazily-evaluated Iterator.unfoldRight by @pivovarit in https://github.com/vavr-io/vavr/pull/3112
• Fix bit indexing in BitSet to use word-relative offsets by @pivovarit in https://github.com/vavr-io/vavr/pull/3116
• JSpecify integration by @pivovarit in https://github.com/vavr-io/vavr/pull/3113
• Javadocs overhaul by @pivovarit in https://github.com/vavr-io/vavr/pull/3125, https://github.com/vavr-io/vavr/pull/3129, https://github.com/vavr-io/vavr/pull/3130, https://github.com/vavr-io/vavr/pull/3110, https://github.com/vavr-io/vavr/pull/3114
• Fix TreeMultimap Java map conversion by @pivovarit in https://github.com/vavr-io/vavr/pull/3132
• ... and many more

New Contributors

• @adamkopec made their first contribution in https://github.com/vavr-io/vavr/pull/3061
• @lycoris106 made their first contribution in https://github.com/vavr-io/vavr/pull/3104

Full Changelog: https://github.com/vavr-io/vavr/compare/v0.10.7...v0.11.0