Kotlin 1.0.0 Beta 3

What's new

• Library
  • increment deprecated in Progressions in favor of step property to Progressions, for-loops updated to refer to step
  • contains() and other similar extensions now accept supertypes of the element of the collection
  • Delegates.mapVal and mapVar, MapVal, MapVar, FixedMapVal, FixedMapVar are deprecated
  • String.toCharArray() introduced instead of String.getChars(); String.toCharList() deprecated
  • MutableCollection.removeAll(predicate: (T) -> Boolean) and similar for retainAll added
  • sequence(initialValueFunction, nextValueFunction) doesn't evaluate first value until it's requested by sequence iterator
  • sequenceOf(Progression) deprecated
  • flatten operation for Sequence<Iterable<...>> added
• Language
  • No references to PropertyMetadata are generated in the byte code
  • Suffixes to numeric literals, such as 1baz are prohibited
  • Comma-separated conditions in when without an argument are prohibited (KT-5143)
  • Annotation classes can't be instantiated (KT-4391)
  • Arrays of annotations supported as annotation arguments (KT-10136)
  • Generic types in catch clauses (including reified T) are prohibited (KT-9816)
  • protected members are allowed in companion objects
  • Calls to non-@JvmStatic protected members of companion objects from subclasses are marked as errors (unsupported)
  • "…" is reserved as a token (KT-9708)
  • Enum entry can not be used as a type (KT-5401)
  • Enum.values is deprecated in favor of Enum.values()
  • private setters are now deprecated for open properties
  • Local sealed classes are deprecated
  • Use of uninitialized variables in lambdas / object literals / local functions is forbidden
  • Overriding setter cannot weaken visibility
  • Inner classes are no longer allowed inside enum entries
  • Implicit receiver smart casts are supported
  • Older deprecations have become errors