Kotlin 1.1-M02 （Early Access Preview）发布了，这是 Kotlin 1.1 的第二个里程碑版本，也带来了大量更新。这个版本带来了让人期待已久的新语言特性，在 lambdas 表达式中的解构，同时还有许多基于 1.1-M1 的新特性改进。部分更新如下：

语言特性

• 用于 lambdas 表达式的解构 (proposal)

  Current limitations:

• Nested destructuring is not supported

• Destructuring in named functions/constructors is not supported

• Is not supported for JS target

编译器

Smart cast enhancements

• KT-2127 Smart cast receiver to not null after a not null safe call

• KT-6840 Make data flow information the same for assigned and assignee

• KT-13426 Fix exception when smartcast on both dispatch & extension receiver

Bound references related issues

• KT-12995 Do not skip generation of the left-hand side for intrinsic bound references and class literals

• KT-13075 Fix codegen for bound class reference

• KT-13110 Fix type mismatch error on class literal with integer receiver expression

• KT-13172 Report error on "this::class" in super constructor call

• KT-13271 Fix incorrect unsupported error on synthetic extension call on LHS of ::

• KT-13367 Inline bound callable reference if it's used only as a lambda

Coroutines related issues

• KT-13156 Do not execute last Unit-typed coroutine statement twice

• KT-13246 Fix VerifyError with coroutines on Dalvik

• KT-13289 Fix VerifyError with coroutines: Bad type on operand stack

• KT-13409 Fix generic variable spilling with coroutines

• KT-13531 Fix ClassCastException when coercion to Unit interacts with generic await() and coroutines

• Prohibit Continuation<*> as a last parameter of suspend functions

• KT-13560 Prohibit non-Unit suspend functions

Typealises related issues

• KT-13200 Fix incorrect number of required type arguments reported on typealias

• KT-13181 Fix unresolved reference for a type alias from a different module

• KT-13161 Support java static methods calls with typealiases

• KT-13835 Do not lose nullability information while expanding type alias in projection position

• KT-13422 Prohibit usage of type alias to exception class as an object in 'throw' expression

• KT-13735 Fix NoSuchMethodError for generic typealias access

• KT-13513 Support SAM constructors for aliased java functional types

• KT-13822 Fix exception for start-projection of a type alias

• KT-14071 Prohibit using type alias as a qualifier for super

• KT-14282 Report error on unused type alias with -language-version 1.0

• KT-14274 Fix type alias resolution when it's used for supertype constructor call

JDK dependent built-in classes related issues

• KT-13209 Change first parameter's type of Map.getOrDefault to K instead of Any

• KT-13069 Do not emit invalid DefaultImpls delegation when interface extends MutableMap with JDK8

data classes and inheritance

• KT-11306 Allow data classes to implement equals/hashCode/toString from base classes

Various JVM code generation issues

• KT-13182 Fix compiler internal error at inline

• KT-13757 Prohibit referencing nested classes by name with $

• KT-12985 Do not create range instances for 'for' loop in CharSequence.indices

• KT-13931 Optimize generated code for IntRange#contains

Various analysis & diagnostic issues

• KT-435 Use parameter names in error messages when calling a function-valued expression

• KT-10001 Fix false unnecessary non-null assertion on a pair element

• KT-12811 Treat function declaration as final if it is a member of a final class

• KT-13961 Report REDECLARATION on private-in-file 'foo' vs public 'foo' in different file

点此查看完整更新内容和发行说明

下载地址

• kotlin-compiler-1.1-M02.zip

• Source code (zip)

• Source code (tar.gz)