• January 6, 2026
• 1 min read

3.2.0 • 32-bit enum sets and weak map improvements

EnumSet

• Added BitSet32.of() which accepts an iterable (!205)
• Added .toSet() and .toMutableSet() (!205)
• Added enumSetOf() and .toEnumSet() (#170, !206)
• Optimized enumSetOf(Foo.entries) (!206)
• Optimized 32-bit EnumSet (#170, !206)

Weak

• Added WeakRef.isEmpty() and WeakRef.isNotEmpty() (!207)
• Added WeakValueHashMap (#178, !225)
• Added toString(), equals() and hashCode() on FakeWeakRef (!225)
• Documented the thread safety of WeakRef and WeakMap (#180, !225)
• Added a wrapper for the JVM WeakHashMap (#179, !226)
• Added a wrapper for the JS WeakMap (#179, !226)

Dependencies

• Kotlin 2.2.21