Kotlin 路线图

欢迎来看 Kotlin 路线图！一窥 Kotlin 团队的工作重点。

关键优先事项

这个路线图的目标是给出一个大的图景。这里列出了主要优先事项——我们投入精力最多的领域：

• 快速流转：让“变更-测试-调试”周期非常快。
• 新版编译器：重写 Kotlin 编译器，针对速度、并行性与统一性进行优化。晚些还会研究插件化。
• 快速流畅的 IDE：改善 Kotlin 插件的稳定性与性能。
• Kotlin 用于 JVM 服务器端开发：在整个 Kotlin 生态系统中扩展对服务器端使用场景的支持。
• Kotlin 多平台移动端：改善在移动平台上共享代码的用户体验与特性集。

以子系统划分的 Kotlin 路线图

To view the biggest projects we're working on, visit the YouTrack board or the Roadmap details table.

If you have any questions or feedback about the roadmap or the items on it, feel free to post them to YouTrack tickets or in the #kotlin-roadmap channel of Kotlin Slack (request an invite).

YouTrack board

Visit the roadmap board in our issue tracker YouTrack

Roadmap details

• This roadmap is not an exhaustive list of all things the team is working on, only the biggest projects.
• There’s no commitment to delivering specific features or fixes in specific versions.
• It lists some things that are postponed and will NOT get the team’s attention in the nearest future.
• We will adjust our priorities as we go and update the roadmap approximately every six months.

What's changed since May 2021

Completed items

We've completed the following items from the previous roadmap:

• ✅ Language: Support programmatic creation of annotation class instances
• ✅ Language: Stabilize typeOf
• ✅ Language: Allow repeating annotations with runtime retention when compiling under Java 8
• ✅ Language: Support annotations on class type parameters
• ✅ Language: Improve type inference in corner cases for popular Java APIs
• ✅ Language: Support for JVM sealed classes
• ✅ Compiler core: Inferring types based on self upper bounds
• ✅ Compiler core: Work on services for the new compiler to interact with IDE
• ✅ Kotlin/Native: Implement safe initialization for top-level properties
• ✅ Kotlin/Native: Prototype a new garbage collector
• ✅ Multiplatform: Support the Apple silicon target in the Kotlin Multiplatform tooling
• ✅ Multiplatform: Improve dependency management for iOS
• ✅ IDE: Move the Kotlin plugin to the IntelliJ platform development infrastructure
• ✅ Build tools: Decrease time for opening Gradle projects
• ✅ Libraries: Improve kotlinx-serialization (release 1.3.0)
• ✅ Libraries: Improve kotlinx-coroutines (release 1.6.0)
• ✅ Libraries: Stabilize Duration API in the standard library
• ✅ Libraries: Get rid of !! after readLine() in the standard library
• ✅ Libraries: Improve usability of multi-threaded coroutines library for Kotlin/Native
• ✅ Website: Revamp Kotlin documentation

Postponed items

We've decided to postpone the following items from the previous roadmap:

• ⏸ Kotlin/Native: Support building Kotlin/Native for Mac Catalyst (x86-64 and arm64)
• ⏸ Kotlin/Native: Support direct interoperability with Swift
• ⏸ Kotlin/Native: Support running Kotlin/Native-produced binaries on Alpine Linux
• ⏸ Kotlin/JS: Improve Dukat support
• ⏸ Kotlin/JS: JS: support ES6 as compilation target
• ⏸ Multiplatform: Improve Kotlin/Native debugging experience
• ⏸ Multiplatform: Implement code sharing between JVM and Android
• ⏸ IDE: Implement advanced tooling that users have in Java but is missing in Kotlin
• ⏸ IDE: Improve the quality of less frequently used features
• ⏸ Build tools: Improve the quality of Gradle import

Other postponed items remain in this state from earlier roadmap versions.

New items

We've added the following items to the roadmap:

• 🆕 Language: Research and prototype namespace-based solution for statics and static extensions
• 🆕 Language: Consider supporting inline sealed classes
• 🆕 Language: Allow denotable definitely not-null types
• 🆕 Language: Design and implement solution for toString on objects
• 🆕 Language: Provide modern and performant replacement for Enum.values()
• 🆕 Language: Allow implementation by delegation to inlined value of inline class
• 🆕 Compiler core: Stabilize the K2 Compiler Plugin API
• 🆕 Compiler core: Investigate JS backend for the K2 compiler
• 🆕 Kotlin/JVM: Release kotlinx-metadata-jvm as Stable
• 🆕 Kotlin/JVM: Fix issues related to inline classes on the JVM
• 🆕 Kotlin/JVM: Allow private top-level classes or type aliases with same name in different files on JVM
• 🆕 Kotlin/JVM: Provide ability to enumerate all direct subclasses of a sealed class at compile-time without reflection
• 🆕 Kotlin/JVM: Support method references to functional interface constructors
• 🆕 Kotlin/JVM: Support Java synthetic property references
• 🆕 Kotlin/Native: Promote new memory manager to Alpha
• 🆕 Multiplatform: Improve environment setup experience for KMM projects
• 🆕 Multiplatform: Improve DSL for managing Kotlin/Native binary output
• 🆕 Multiplatform: Improve stability and robustness of the multiplatform toolchain
• 🆕 IDE: Make update of compiler/platform versions faster
• 🆕 IDE: Improve Multiplatform support
• 🆕 IDE: Stabilize Eclipse plugin
• 🆕 Build tools: Provide better experience with Kotlin Daemon
• 🆕 Build tools: Make kapt work out of the box with latest JDKs
• 🆕 Libraries: Release Dokka as Stable
• 🆕 Libraries: Launch kotlinx-kover and productize it further
• 🆕 Libraries: Release kotlinx-serialization 1.4
• 🆕 Libraries: Release kotlinx-coroutines 1.7
• 🆕 Website: Improve Kotlin Playground
• 🆕 Website: Provide infrastructure for documentation localization by community

Removed items

We've removed the following items from the roadmap:

• ❌ Kotlin/Native: Support interoperability with C++
• ❌ Multiplatform: Improve Gradle and Compiler error messages
• ❌ Build tools: Improve Kotlin Maven support
• ❌ Libraries: Implement any new multiplatform libraries
• ❌ Libraries: kotlinx-cli
• ❌ Libraries: binary-compatibility-validator
• ❌ Libraries: kotlinx-io

Items in progress

All other previously identified roadmap items are in progress. You can check their YouTrack tickets for updates.