{"id":34497,"date":"2020-04-13T21:23:26","date_gmt":"2020-04-13T13:23:26","guid":{"rendered":"https:\/\/blog.jetbrains.com\/cn\/?p=782"},"modified":"2020-04-15T10:39:47","modified_gmt":"2020-04-15T02:39:47","slug":"kotlin-1-4-m1","status":"publish","type":"post","link":"https:\/\/blog.jetbrains.com\/zh-hans\/2020\/04\/13\/kotlin-1-4-m1\/","title":{"rendered":"Kotlin 1.4-M1 \u73b0\u5df2\u53d1\u5e03\uff01"},"content":{"rendered":"\u6211\u4eec\u9ad8\u5174\u5730\u5ba3\u5e03\u65b0\u7684\u4e3b\u8981\u7248\u672c\u7684\u7b2c\u4e00\u4e2a\u9884\u89c8\u7248\u672c\uff1aKotlin 1.4-M1\u3002\r\n\r\n\u51e0\u4e2a\u6708\u4ee5\u524d\uff0c\u6211\u4eec\u9488\u5bf9\u00a0Kotlin 1.4 \u503c\u5f97\u671f\u5f85\u7684\u4eae\u70b9\u53d1\u5e03\u4e86\u4e00\u5219\u516c\u544a\u3002\u968f\u7740\u53d1\u5e03\u4e34\u8fd1\uff0c\u6211\u4eec\u73b0\u5728\u63d0\u4f9b\u4e00\u4e2a\u9884\u89c8\u7248\u672c\uff0c\u8ba9\u5927\u5bb6\u80fd\u591f\u8bd5\u7528\u4e00\u4e9b\u65b0\u529f\u80fd\u3002\r\n\r\n\u5728\u8fd9\u7bc7\u535a\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u91cd\u70b9\u4ecb\u7ecd 1.4-M1 \u4e2d\u7684\u4ee5\u4e0b\u65b0\u529f\u80fd\u548c\u4e3b\u8981\u6539\u8fdb\uff1a\r\n\r\n\u9ed8\u8ba4\u542f\u7528\u4e00\u79cd\u529f\u80fd\u66f4\u52a0\u5f3a\u5927\u7684\u65b0\u7c7b\u578b\u63a8\u7406\u7b97\u6cd5\u3002\r\n\r\n\u534f\u5b9a\u73b0\u5728\u53ef\u7528\u4e8e final \u6210\u5458\u51fd\u6570\u3002\r\n\r\n\t\r\nKotlin\/JVM \u7f16\u8bd1\u5668\u73b0\u5728\u53ef\u5728\u5b57\u8282\u7801\u4e2d\u4e3a Java 8 \u548c\u66f4\u9ad8\u7248\u672c\u751f\u6210\u7c7b\u578b\u6ce8\u89e3\u3002\r\n\r\n\t\r\nKotlin\/JS\u00a0\u7684\u65b0\u540e\u7aef\u4e3a\u751f\u6210\u7684\u5de5\u4ef6\u5e26\u6765\u5927\u5e45\u63d0\u5347\u3002\r\n\r\n\t\r\n\u6807\u51c6\u5e93\u4e2d\u7684\u6e10\u8fdb\u5f0f\u53d8\u66f4\uff1a\u5b8c\u6210\u5f03\u7528\u5468\u671f\u5e76\u5f03\u7528\u4e00\u4e9b\u989d\u5916\u7684\u90e8\u5206\u3002\r\n\r\n\r\n\u60a8\u53ef\u4ee5\u5728\u53d8\u66f4\u65e5\u5fd7\u4e2d\u627e\u5230\u5b8c\u6574\u7684\u53d8\u66f4\u5217\u8868\u3002\u6211\u4eec\u8981\u4e00\u5982\u65e2\u5f80\u5730\u611f\u8c22\u5916\u90e8\u8d21\u732e\u8005\u3002\r\n\u6211\u4eec\u5f3a\u70c8\u5efa\u8bae\u60a8\u8bd5\u7528\u9884\u89c8\u7248\uff0c\u5e76\u611f\u8c22\u60a8\u5728\u6211\u4eec\u7684\u95ee\u9898\u8ddf\u8e2a\u5668\u4e2d\u63d0\u4f9b\u4efb\u4f55\u53cd\u9988\u3002\r\n\r\n\u529f\u80fd\u66f4\u52a0\u5f3a\u5927\u7684\u7c7b\u578b\u63a8\u7406\u7b97\u6cd5\r\nKotlin 1.4 \u5c06\u4f7f\u7528\u4e00\u79cd\u529f\u80fd\u66f4\u52a0\u5f3a\u5927\u7684\u65b0\u7c7b\u578b\u63a8\u7406\u7b97\u6cd5\u3002\u60a8\u4e4b\u524d\u5df2\u7ecf\u53ef\u4ee5\u901a\u8fc7\u6307\u5b9a\u7f16\u8bd1\u5668\u9009\u9879\u5728 Kotlin 1.3 \u4e2d\u8bd5\u7528\u8fd9\u79cd\u65b0\u7b97\u6cd5\uff0c\u73b0\u5728\u5219\u53ef\u4ee5\u9ed8\u8ba4\u4f7f\u7528\u3002\u60a8\u53ef\u4ee5\u5728\u00a0YouTrack\u00a0\u4e2d\u627e\u5230\u65b0\u7b97\u6cd5\u4e2d\u4fee\u590d\u7684\u5b8c\u6574\u95ee\u9898\u5217\u8868\u3002\u5728\u8fd9\u7bc7\u535a\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u91cd\u70b9\u4ecb\u7ecd\u4e00\u4e9b\u6700\u503c\u5f97\u6ce8\u610f\u7684\u6539\u8fdb\u3002\r\n\r\nKotlin \u51fd\u6570\u548c\u63a5\u53e3\u7684 SAM \u8f6c\u6362\r\nSAM \u8f6c\u6362\u8ba9\u60a8\u53ef\u4ee5\u5728\u9884\u671f\u51fa\u73b0\u4e00\u4e2a\u5305\u542b\u201c\u5355\u62bd\u8c61\u65b9\u6cd5\u201d\u7684\u63a5\u53e3\u65f6\u4f20\u9012 lambda\u3002\u4e4b\u524d\uff0c\u60a8\u53ea\u80fd\u5728 Kotlin \u4e2d\u4f7f\u7528 Java \u65b9\u6cd5\u548c Java \u63a5\u53e3\u65f6\u5e94\u7528 SAM \u8f6c\u6362\uff0c\u73b0\u5728\u60a8\u4e5f\u53ef\u4ee5\u5c06\u5b83\u4e0e Kotlin \u51fd\u6570\u548c\u63a5\u53e3\u4e00\u8d77\u4f7f\u7528\u3002\r\nKotlin \u73b0\u5728\u652f\u6301 Kotlin \u63a5\u53e3\u7684 SAM \u8f6c\u6362\u3002\u8bf7\u6ce8\u610f\uff0c\u5728 Java \u4e2d\u7684\u64cd\u4f5c\u4e0d\u540c\uff1a\u60a8\u9700\u8981\u660e\u786e\u5730\u6807\u8bb0\u51fd\u6570\u63a5\u53e3\u3002\u4f7f\u7528\u00a0fun\u00a0\u5173\u952e\u5b57\u6807\u8bb0\u63a5\u53e3\u540e\uff0c\u5728\u63a5\u53e3\u9884\u8ba1\u4e3a\u53c2\u6570\u65f6\uff0c\u60a8\u90fd\u53ef\u4ee5\u5c06 lambda \u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\uff1a\r\n\r\nfun interface Action {\r\nfun run()\r\n}\r\n\r\nfun runAction(a: Action) = a.run()\r\n\r\nfun main() {\r\nrunAction {\r\nprintln(\"Hello, Kotlin 1.4!\")\r\n}\r\n}\r\n\u60a8\u53ef\u4ee5\u5728\u4e4b\u524d\u7684\u535a\u6587\u4e2d\u9605\u8bfb\u4e0e\u6b64\u76f8\u5173\u7684\u66f4\u591a\u8be6\u7ec6\u4fe1\u606f\u3002\r\nKotlin \u4ece\u6700\u5f00\u59cb\u5c31\u652f\u6301 Java \u63a5\u53e3\u7684 SAM \u8f6c\u6362\uff0c\u4f46\u6709\u4e00\u79cd\u60c5\u51b5\u4e0d\u53d7\u652f\u6301\uff0c\u5728\u4f7f\u7528\u73b0\u6709 Java \u5e93\u65f6\u4f1a\u4ee4\u4eba\u5f88\u70e6\u3002\u5982\u679c\u60a8\u8c03\u7528\u4e86\u5c06\u4e24\u4e2a SAM \u63a5\u53e3\u4f5c\u4e3a\u53c2\u6570\u7684 Java \u65b9\u6cd5\uff0c\u4e24\u4e2a\u53c2\u6570\u9700\u8981\u90fd\u4e3a lambda \u6216\u5e38\u89c4\u5bf9\u8c61\u3002\u4e0d\u53ef\u4ee5\u5c06\u4e00\u4e2a\u53c2\u6570\u4f5c\u4e3a lambda \u800c\u53e6\u4e00\u4e2a\u53c2\u6570\u4f5c\u4e3a\u5bf9\u8c61\u6765\u4f20\u9012\u3002\u65b0\u7b97\u6cd5\u4fee\u590d\u4e86\u8fd9\u4e2a\u95ee\u9898\uff0c\u5728\u4efb\u4f55\u60c5\u51b5\u4e0b\u60a8\u90fd\u53ef\u4ee5\u4f20\u9012 lambda\uff0c\u800c\u4e0d\u662f SAM \u63a5\u53e3\uff0c\u8fd9\u6b63\u662f\u60a8\u671f\u5f85\u7684\u8fd0\u4f5c\u65b9\u5f0f\u3002\r\n\r\n\u5728\u66f4\u591a\u7528\u4f8b\u4e2d\u81ea\u52a8\u63a8\u65ad\u7c7b\u578b\r\n\u65b0\u63a8\u7406\u7b97\u6cd5\u4f1a\u4e3a\u8bb8\u591a\u7528\u4f8b\u63a8\u65ad\u7c7b\u578b\uff0c\u800c\u65e7\u63a8\u7406\u8981\u6c42\u60a8\u660e\u786e\u5730\u6307\u5b9a\u5b83\u4eec\u3002\u4f8b\u5982\uff0c\u5728\u4ee5\u4e0b\u793a\u4f8b\u4e2d\uff0clambda \u53c2\u6570\u00a0it\u00a0\u7684\u7c7b\u578b\u5c06\u6b63\u786e\u63a8\u65ad\u4e3a\u00a0String?\uff1a\r\n\r\nval rulesMap: Map<String, (String?) -> Boolean> = mapOf(\r\n    \"weak\" to { it != null },\r\n    \"medium\" to { !it.isNullOrBlank() },\r\n    \"strong\" to { it != null && \"^[a-zA-Z0-9]+$\".toRegex().matches(it) }\r\n)\r\n\r\nfun main() {\r\n    println(rulesMap.getValue(\"weak\")(\"abc!\"))\r\n    println(rulesMap.getValue(\"strong\")(\"abc\"))\r\n    println(rulesMap.getValue(\"strong\")(\"abc!\"))\r\n}\r\n\u5728 Kotlin 1.3 \u4e2d\uff0c\u60a8\u9700\u8981\u5f15\u5165\u663e\u5f0f lambda \u53c2\u6570\uff0c\u6216\u8005\u5c06\u00a0to\u00a0\u66ff\u6362\u4e3a\u5305\u542b\u663e\u5f0f\u6cdb\u578b\u53c2\u6570\u7684\u00a0Pair\u00a0\u6784\u9020\u51fd\u6570\u624d\u53ef\u4ee5\u3002\r\n\r\nlambda \u4e2d\u6700\u540e\u4e00\u4e2a\u8868\u8fbe\u5f0f\u7684\u667a\u80fd\u8f6c\u6362\r\n\u5728 Kotlin 1.3 \u4e2d\uff0clambda \u4e2d\u7684\u6700\u540e\u4e00\u4e2a\u8868\u8fbe\u5f0f\u4e0d\u662f\u667a\u80fd\u8f6c\u6362\uff0c\u9664\u975e\u60a8\u6307\u5b9a\u9884\u671f\u7684\u7c7b\u578b\u3002\u56e0\u6b64\uff0c\u5728\u4ee5\u4e0b\u793a\u4f8b\u4e2d\uff0cKotlin 1.3 \u5c06\u00a0String?\u00a0\u63a8\u65ad\u4e3a\u00a0result\u00a0\u53d8\u91cf\u7684\u7c7b\u578b\uff1a\r\n\r\nval result = run {\r\n    var str = currentValue()\r\n    if (str == null) {\r\n        str = \"test\"\r\n    }\r\n    str \/\/ the Kotlin compiler knows that str is not null here\r\n}\r\n\/\/ The type of 'result' is String? in Kotlin 1.3 and String in Kotlin 1.4\r\n\u5728 Kotlin 1.4 \u4e2d\uff0c\u501f\u52a9\u65b0\u7684\u63a8\u7406\u7b97\u6cd5\uff0clambda \u4e2d\u7684\u6700\u540e\u4e00\u4e2a\u8868\u8fbe\u5f0f\u53ef\u4ee5\u5b9e\u73b0\u667a\u80fd\u8f6c\u6362\uff0c\u5e76\u4e14\u8fd9\u79cd\u66f4\u7cbe\u786e\u7684\u65b0\u7c7b\u578b\u7528\u4e8e\u63a8\u65ad\u7ed3\u679c lambda \u7c7b\u578b\u3002\u56e0\u6b64\uff0cresult\u00a0\u53d8\u91cf\u7684\u7c7b\u578b\u53d8\u4e3a\u00a0String\u3002\r\n\u5728 Kotlin 1.3 \u4e2d\uff0c\u60a8\u7ecf\u5e38\u9700\u8981\u6dfb\u52a0\u663e\u5f0f\u8f6c\u6362\uff08!!\u00a0\u6216\u7c7b\u578b\u8f6c\u6362\uff0c\u4f8b\u5982\u00a0as String\uff09\u6765\u4f7f\u8fd9\u79cd\u60c5\u51b5\u594f\u6548\uff0c\u800c\u73b0\u5728\u8fd9\u4e9b\u8f6c\u6362\u4e0d\u518d\u5fc5\u8981\u3002\r\n\r\n\u53ef\u8c03\u7528\u7684\u5f15\u7528\u7684\u667a\u80fd\u8f6c\u6362\r\n\u5728 Kotlin 1.3 \u4e2d\uff0c\u60a8\u65e0\u6cd5\u8bbf\u95ee\u667a\u80fd\u8f6c\u6362\u7c7b\u578b\u7684\u6210\u5458\u5f15\u7528\u3002\u73b0\u5728\uff0c\u60a8\u53ef\u4ee5\uff1a\r\n\r\nsealed class Animal\r\nclass Cat : Animal() {\r\n    fun meow() {\r\n        println(\"meow\")\r\n    }\r\n}\r\n\r\nclass Dog : Animal() {\r\n    fun woof() {\r\n        println(\"woof\")\r\n    }\r\n}\r\n\r\nfun perform(animal: Animal) {\r\n    val kFunction: KFunction<*> = when (animal) {\r\n        is Cat -> animal::meow\r\n        is Dog -> animal::woof\r\n    }\r\n    kFunction.call()\r\n}\r\n\r\nfun main() {\r\n    perform(Cat())\r\n}\r\n\u5728\u52a8\u7269\u53d8\u91cf\u667a\u80fd\u8f6c\u6362\u4e3a\u7279\u5b9a\u7c7b\u578b\u00a0Cat\u00a0\u548c\u00a0Dog\u00a0\u4e4b\u540e\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4e0d\u540c\u7684\u6210\u5458\u5f15\u7528\u00a0animal::meow\u00a0\u548c\u00a0animal::woof\u3002\u5728\u7c7b\u578b\u68c0\u67e5\u4e4b\u540e\uff0c\u60a8\u53ef\u4ee5\u8bbf\u95ee\u4e0e\u5b50\u7c7b\u578b\u5bf9\u5e94\u7684\u6210\u5458\u5f15\u7528\u3002\r\n\u66f4\u51fa\u8272\u7684\u53ef\u8c03\u7528\u5f15\u7528\u63a8\u7406\r\n\u73b0\u5728\uff0c\u53ef\u4ee5\u66f4\u65b9\u4fbf\u5730\u4f7f\u7528\u5305\u542b\u9ed8\u8ba4\u53c2\u6570\u503c\u7684\u51fd\u6570\u7684\u53ef\u8c03\u7528\u5f15\u7528\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u00a0foo\u00a0\u51fd\u6570\u7684\u53ef\u8c03\u7528\u5f15\u7528\u53ef\u4ee5\u89e3\u91ca\u4e3a\u83b7\u53d6\u4e00\u4e2a\u00a0Int\u00a0\u53c2\u6570\u6216\u4e0d\u83b7\u53d6\u53c2\u6570\uff1a\r\n\r\nfun foo(i: Int = 0): String = \"$i!\"\r\n\r\nfun apply1(func: () -> String): String = func()\r\nfun apply2(func: (Int) -> String): String = func(42)\r\n\r\nfun main() {\r\n    println(apply1(::foo))\r\n    println(apply2(::foo))\r\n}\r\n\u66f4\u51fa\u8272\u7684\u59d4\u6258\u5c5e\u6027\u63a8\u7406\r\n\u4e4b\u524d\uff0c\u5728\u5206\u6790\u9075\u5faa\u00a0by\u00a0\u5173\u952e\u5b57\u7684\u59d4\u6258\u8868\u8fbe\u5f0f\u65f6\uff0c\u4e0d\u4f1a\u8003\u8651\u59d4\u6258\u5c5e\u6027\u7684\u7c7b\u578b\u3002\u4f8b\u5982\uff0c\u4e4b\u524d\u4e0d\u4f1a\u7f16\u8bd1\u4ee5\u4e0b\u4ee3\u7801\uff0c\u4f46\u73b0\u5728\u7f16\u8bd1\u5668\u53ef\u4ee5\u6b63\u786e\u5730\u5c06\u00a0old\u00a0\u548c\u00a0new\u00a0\u53c2\u6570\u7684\u7c7b\u578b\u63a8\u65ad\u4e3a\u00a0String?\uff1a\r\n\r\nimport kotlin.properties.Delegates\r\n\r\nfun main() {\r\n    var prop: String? by Delegates.observable(null) { p, old, new ->\r\n        println(\"$old \u2192 $new\")\r\n    }\r\n    prop = \"abc\"\r\n    prop = \"xyz\"\r\n}\r\n \r\n\u8bed\u8a00\u53d8\u66f4\r\n\u5927\u591a\u6570\u8bed\u8a00\u53d8\u66f4\u5728\u4e4b\u524d\u7684\u535a\u6587\u4e2d\u5df2\u6709\u4ecb\u7ecd\uff1a\r\n\r\n\r\n\t\r\nKotlin \u7c7b\u7684 SAM \u8f6c\u6362\r\n\r\n\t\r\n\u6df7\u5408\u547d\u540d\u548c\u4f4d\u7f6e\u53c2\u6570\r\n\r\n\t\r\n\u4f18\u5316\u7684\u59d4\u6258\u5c5e\u6027\r\n\r\n\t\r\n\u5c3e\u968f\u9017\u53f7\r\n\r\n\t\r\n\u5728 when \u4e2d\u6362\u884c\u5e76\u7ee7\u7eed\r\n\r\n\t\r\n\u5c3e\u9012\u5f52\u51fd\u6570\u7684\u53d8\u66f4\r\n\r\n\r\n\u5728\u8fd9\u7bc7\u535a\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u91cd\u70b9\u4ecb\u7ecd\u4e0e\u534f\u5b9a\u76f8\u5173\u7684\u4e00\u4e9b\u5c0f\u5e45\u6539\u8fdb\u3002\r\n\r\n\u534f\u5b9a\u652f\u6301\r\n\u5b9a\u4e49\u81ea\u5b9a\u4e49\u534f\u5b9a\u7684\u8bed\u6cd5\u4ecd\u4e3a\u5b9e\u9a8c\u6027\u529f\u80fd\uff0c\u4f46\u6211\u4eec\u5df2\u652f\u6301\u51e0\u79cd\u65b0\u7684\u7528\u4f8b\uff0c\u5176\u4e2d\u534f\u5b9a\u53ef\u80fd\u4f1a\u5f88\u6709\u7528\u3002\u60a8\u73b0\u5728\u53ef\u4ee5\u4f7f\u7528\u5177\u4f53\u5316\u7684\u6cdb\u578b\u7c7b\u578b\u53c2\u6570\u6765\u5b9a\u4e49\u534f\u5b9a\u3002\r\n\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u4e3a\u00a0assertIsInstance\u00a0\u51fd\u6570\u5b9e\u73b0\u4ee5\u4e0b\u534f\u5b9a\uff1a\r\n@OptIn(ExperimentalContracts::class)\r\ninline fun <reified T> assertIsInstance(value: Any?) {\r\n    contract {\r\n        returns() implies (value is T)\r\n    }\r\n\r\n    assertTrue(value is T)\r\n}\r\n\u7531\u4e8e\u00a0T\u00a0\u7c7b\u578b\u53c2\u6570\u5df2\u5177\u4f53\u5316\uff0c\u60a8\u53ef\u4ee5\u5728\u51fd\u6570\u4e3b\u4f53\u4e2d\u68c0\u67e5\u5b83\u7684\u7c7b\u578b\u3002\u73b0\u5728\uff0c\u8fd9\u4e00\u70b9\u5728\u534f\u5b9a\u4e2d\u4e5f\u53ef\u4ee5\u5b9e\u73b0\u3002\u4e00\u4e2a\u5305\u542b\u65ad\u8a00\u6d88\u606f\u7684\u76f8\u4f3c\u51fd\u6570\u7a0d\u540e\u5c06\u6dfb\u52a0\u5230\u00a0kotlin.test\u00a0\u5e93\u4e2d\u3002\r\n\u53e6\u5916\uff0c\u60a8\u73b0\u5728\u8fd8\u53ef\u4ee5\u4e3a\u00a0final\u00a0\u6210\u5458\u5b9a\u4e49\u81ea\u5b9a\u4e49\u534f\u5b9a\u3002\u4e4b\u524d\uff0c\u4e3a\u6210\u5458\u51fd\u6570\u5b9a\u4e49\u534f\u5b9a\u662f\u5b8c\u5168\u7981\u6b62\u7684\uff0c\u56e0\u4e3a\u5728\u5c42\u6b21\u7ed3\u6784\u4e2d\u4e3a\u4e00\u4e9b\u6210\u5458\u5b9a\u4e49\u534f\u5b9a\u610f\u5473\u7740\u4e5f\u9700\u8981\u5b9a\u4e49\u76f8\u5e94\u534f\u5b9a\u7684\u5c42\u6b21\u7ed3\u6784\uff0c\u800c\u4e14\u5728\u8bbe\u8ba1\u548c\u8ba8\u8bba\u65b9\u9762\u4e5f\u5b58\u5728\u95ee\u9898\u3002\u4e0d\u8fc7\uff0c\u5982\u679c\u6210\u5458\u51fd\u6570\u4e3a\u00a0final\uff0c\u4e14\u4e0d\u4f1a\u91cd\u5199\u4efb\u4f55\u5176\u4ed6\u51fd\u6570\uff0c\u5219\u53ef\u4ee5\u5b89\u5168\u5730\u4e3a\u5b83\u5b9a\u4e49\u534f\u5b9a\u3002\r\n\r\n\u6807\u51c6\u5e93\u53d8\u66f4\r\n\u6392\u9664\u5f03\u7528\u7684\u5b9e\u9a8c\u6027\u534f\u540c\u7a0b\u5e8f\r\n\u5728 1.3.0 \u4e2d\uff0c\u5df2\u5f03\u7528\u00a0kotlin.coroutines.experimental\u00a0API\uff0c\u800c\u652f\u6301\u00a0kotlin.coroutines\u3002\u5728 1.4-M1 \u4e2d\uff0c\u6211\u4eec\u5c06\u00a0kotlin.coroutines.experimental\u00a0\u4ece\u6807\u51c6\u5e93\u4e2d\u79fb\u9664\uff0c\u5f7b\u5e95\u5b8c\u6210\u4e86\u5b83\u7684\u5f03\u7528\u5468\u671f\u3002\u5bf9\u4e8e\u4ecd\u5728 JVM \u4e0a\u4f7f\u7528\u5b83\u7684\u7528\u6237\uff0c\u6211\u4eec\u63d0\u4f9b\u517c\u5bb9\u6027\u5de5\u4ef6\u00a0kotlin-coroutines-experimental-compat.jar\u00a0\u4ee5\u53ca\u6240\u6709\u5b9e\u9a8c\u6027\u534f\u540c\u7a0b\u5e8f API\u3002\u6211\u4eec\u51c6\u5907\u5c06\u5b83\u53d1\u5e03\u5230 Maven \u5e76\u5305\u542b\u5728\u6807\u51c6\u5e93\u4ee5\u5916\u7684 Kotlin \u5206\u53d1\u4e2d\u3002\u5f53\u524d\uff0c\u6211\u4eec\u5df2\u7ecf\u5c06\u5b83\u4e0e 1.4-M1 \u5de5\u4ef6\u4e00\u540c\u53d1\u5e03\u5230\u00a0bintray\u00a0\u5b58\u50a8\u5e93\u3002\r\n\r\n\u79fb\u9664\u5f03\u7528\u7684 mod \u8fd0\u7b97\u7b26\r\n\u53e6\u4e00\u4e2a\u5f03\u7528\u7684\u51fd\u6570\u662f\u6570\u503c\u7c7b\u578b\u7684\u00a0mod\u00a0\u8fd0\u7b97\u7b26\uff0c\u8fd9\u4e2a\u8fd0\u7b97\u7b26\u4f1a\u5728\u9664\u6cd5\u8fd0\u7b97\u4e4b\u540e\u8ba1\u7b97\u4f59\u6570\u3002\u5728 Kotlin 1.1 \u4e2d\uff0c\u6b64\u8fd0\u7b97\u7b26\u88ab\u00a0rem()\u00a0\u51fd\u6570\u66ff\u4ee3\u3002\u73b0\u5728\uff0c\u6211\u4eec\u5c06\u5b83\u4ece\u6807\u51c6\u5e93\u4e2d\u5b8c\u5168\u79fb\u9664\u3002\r\n\r\n\u4ece\u6d6e\u52a8\u7c7b\u578b\u5230 Byte \u548c Short \u8f6c\u6362\u7684\u5f03\u7528\r\n\u6807\u51c6\u5e93\u5305\u542b\u5c06\u6d6e\u70b9\u6570\u8f6c\u6362\u4e3a\u6574\u6570\u7c7b\u578b\u7684\u51fd\u6570\uff1atoInt()\u3001toShort()\u3001toByte()\u3002\u5c06\u6d6e\u70b9\u6570\u8f6c\u6362\u4e3a\u00a0Short\u00a0\u548c\u00a0Byte\u00a0\u53ef\u80fd\u5bfc\u81f4\u610f\u5916\u7ed3\u679c\uff0c\u56e0\u4e3a\u503c\u8303\u56f4\u548c\u53d8\u91cf\u5927\u5c0f\u8f83\u5c0f\u3002\u4e3a\u4e86\u907f\u514d\u8fd9\u79cd\u95ee\u9898\uff0c\u4ece 1.4-M1 \u8d77\uff0c\u6211\u4eec\u5c06\u5f03\u7528\u00a0Double\u00a0\u548c\u00a0Float\u00a0\u7c7b\u578b\u7684\u51fd\u6570\u00a0toShort()\u00a0\u548c\u00a0toByte()\u3002\u5982\u679c\u60a8\u4ecd\u9700\u8981\u5c06\u6d6e\u70b9\u6570\u8f6c\u6362\u4e3a\u00a0Byte\u00a0\u6216\u00a0Short\uff0c\u8bf7\u8fdb\u884c\u4e24\u6b65\u8f6c\u6362\uff1a\u9996\u5148\u8f6c\u6362\u4e3a\u00a0Int\uff0c\u7136\u540e\u8f6c\u6362\u4e3a\u76ee\u6807\u7c7b\u578b\u3002\r\n\r\n\u5e38\u7528\u53cd\u5c04 API\r\n\u6211\u4eec\u4fee\u6539\u4e86\u5e38\u7528\u53cd\u5c04 API\u3002\u73b0\u5728\uff0c\u5b83\u4ec5\u5305\u542b\u53ef\u4ee5\u5728\u6240\u6709\u4e09\u4e2a\u76ee\u6807\u5e73\u53f0\uff08JVM\u3001JS\u3001Native\uff09\u4e0a\u4f7f\u7528\u7684\u6210\u5458\uff0c\u8fd9\u6837\u60a8\u5c31\u53ef\u4ee5\u786e\u4fdd\u540c\u4e00\u4ee3\u7801\u53ef\u4ee5\u7528\u4e8e\u4efb\u4f55\u4e00\u4e2a\u5e73\u53f0\u3002\r\n\r\nuse() \u548c\u65f6\u95f4\u6d4b\u91cf\u51fd\u6570\u7684\u65b0\u534f\u5b9a\r\n\u6211\u4eec\u5c06\u5728\u6807\u51c6\u5e93\u4e2d\u6269\u5927\u534f\u5b9a\u7684\u4f7f\u7528\u3002\u5728 1.4-M1 \u4e2d\uff0c\u6211\u4eec\u6dfb\u52a0\u4e86\u4e00\u4e9b\u534f\u5b9a\uff0c\u53ef\u4ee5\u4e3a\u00a0use()\u00a0\u51fd\u6570\u4e0e\u65f6\u95f4\u6d4b\u91cf\u51fd\u6570\u00a0measureTimeMillis()\u00a0\u548c\u00a0measureNanoTime()\u00a0\u58f0\u660e\u4ee3\u7801\u5757\u7684\u5355\u6b21\u6267\u884c\u3002\r\n\r\nKotlin \u53cd\u5c04\u7684 Proguard \u914d\u7f6e\r\n\u4ece 1.4-M1 \u5f00\u59cb\uff0c\u6211\u4eec\u4e3a\u00a0kotlin-reflect.jar\u00a0\u4e2d\u7684 Kotlin \u53cd\u5c04\u5d4c\u5165\u4e86 Proguard\/R8 \u914d\u7f6e\u3002\u8fd9\u6837\uff0c\u4f7f\u7528 R8 \u6216 Proguard \u7684\u5927\u591a\u6570 Android \u9879\u76ee\u65e0\u9700\u989d\u5916\u7684\u914d\u7f6e\u5c31\u53ef\u4ee5\u4f7f\u7528 kotlin-reflect\u3002\u60a8\u65e0\u9700\u518d\u4e3a kotlin-reflect \u5185\u90e8\u9879\u590d\u5236\u7c98\u8d34 Proguard \u89c4\u5219\u3002\u4f46\u662f\u8bf7\u6ce8\u610f\uff0c\u60a8\u4ecd\u9700\u8981\u660e\u786e\u5730\u5217\u51fa\u8981\u5728\u4e0a\u9762\u53cd\u5c04\u7684\u6240\u6709 API\u3002\r\n\r\nKotlin\/JVM\r\n\u4ece 1.3.70 \u7248\u8d77\uff0cKotlin \u53ef\u4ee5\u5728 JVM \u5b57\u8282\u7801\uff08\u76ee\u6807\u7248\u672c 1.8+\uff09\u4e2d\u751f\u6210\u7c7b\u578b\u6ce8\u89e3\uff0c\u4ee5\u4fbf\u5b83\u4eec\u5728\u8fd0\u884c\u65f6\u53ef\u7528\u3002\u793e\u533a\u8bf7\u6c42\u6b64\u529f\u80fd\u5df2\u6709\u4e00\u6bb5\u65f6\u95f4\uff0c\u56e0\u4e3a\u5b83\u8ba9\u4f7f\u7528\u67d0\u4e9b\u73b0\u6709 Java \u5e93\u66f4\u52a0\u5bb9\u6613\uff0c\u5e76\u4e14\u4e3a\u65b0\u5e93\u7684\u4f5c\u8005\u63d0\u4f9b\u4e86\u66f4\u591a\u529f\u80fd\u3002\r\n\u5728\u4ee5\u4e0b\u793a\u4f8b\u4e2d\uff0c\u53ef\u4ee5\u5c06\u00a0String\u00a0\u7c7b\u578b\u4e0a\u7684\u00a0@Foo\u00a0\u6ce8\u89e3\u53d1\u51fa\u5230\u5b57\u8282\u7801\uff0c\u7136\u540e\u7531\u5e93\u4ee3\u7801\u4f7f\u7528\uff1a\r\n\r\n@Target(AnnotationTarget.TYPE)\r\nannotation class Foo\r\n\r\nclass A {\r\n    fun foo(): @Foo String = \"OK\"\r\n}\r\n\u6709\u5173\u5982\u4f55\u5728\u5b57\u8282\u7801\u4e2d\u53d1\u51fa\u7c7b\u578b\u6ce8\u89e3\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605\u00a0Kotlin 1.3.70 \u7248\u672c\u535a\u6587\u7684\u76f8\u5173\u90e8\u5206\u3002\r\n\r\nKotlin\/JS\r\n\u5bf9\u4e8e Kotlin\/JS\uff0c\u6b64\u91cc\u7a0b\u7891\u5305\u542b\u5bf9 Gradle DSL \u7684\u53d8\u66f4\uff0c\u8fd9\u662f\u5305\u542b\u65b0\u7684 IR \u7f16\u8bd1\u5668\u540e\u7aef\u7684\u7b2c\u4e00\u4e2a\u7248\u672c\uff0c\u65b0\u7f16\u8bd1\u5668\u5e26\u6765\u4e86\u4f18\u5316\u548c\u65b0\u529f\u80fd\u3002\r\n\r\nGradle DSL \u53d8\u66f4\r\n\u5728\u00a0kotlin.js\u00a0\u548c\u00a0multiplatform\u00a0Gradle \u63d2\u4ef6\u4e2d\uff0c\u5f15\u5165\u4e86\u4e00\u4e2a\u91cd\u8981\u7684\u65b0\u8bbe\u7f6e\u3002\u5728\u00a0build.gradle.kts\u00a0\u6587\u4ef6\u4e2d\u7684\u76ee\u6807\u5757\u5185\uff0c\u73b0\u5df2\u652f\u6301\u00a0produceExecutable()\uff0c\u5982\u679c\u60a8\u60f3\u8981\u5728\u6784\u5efa\u65f6\u751f\u6210\u00a0.js\u00a0\u5de5\u4ef6\uff0c\u5219\u5fc5\u987b\u4f7f\u7528\u5b83\uff1a\r\n\r\nkotlin {\r\n    target {\r\n        useCommonJs()\r\n\r\n        produceExecutable()\r\n        \r\n        browser {}\r\n    }\r\n}\r\n\u5982\u679c\u60a8\u8981\u7f16\u5199 Kotlin\/JS \u5e93\uff0c\u53ef\u4ee5\u5ffd\u7565\u00a0produceExecutable()\u3002\u4f7f\u7528\u65b0\u7684 IR \u7f16\u8bd1\u5668\u540e\u7aef\uff08\u66f4\u591a\u8be6\u7ec6\u4fe1\u606f\u5982\u4e0b\uff09\u65f6\uff0c\u5ffd\u7565\u6b64\u8bbe\u7f6e\u610f\u5473\u7740\u4e0d\u4f1a\u751f\u6210\u53ef\u6267\u884c\u7684 JS \u6587\u4ef6\uff08\u56e0\u6b64\uff0c\u6784\u5efa\u8fc7\u7a0b\u7684\u901f\u5ea6\u52a0\u5feb\uff09\u3002\u4f1a\u5728\u00a0build\/libs\u00a0\u6587\u4ef6\u5939\u4e2d\u751f\u6210\u4e00\u4e2a\u00a0klib\u00a0\u6587\u4ef6\uff0c\u6b64\u6587\u4ef6\u53ef\u4ee5\u5728\u5176\u4ed6 Kotlin\/JS \u9879\u76ee\u4e2d\u4f7f\u7528\uff0c\u6216\u5728\u540c\u4e00\u9879\u76ee\u4e2d\u7528\u4f5c\u4f9d\u8d56\u9879\u3002\u5982\u679c\u60a8\u4e0d\u660e\u786e\u6307\u5b9a\u00a0produceExecutable()\uff0c\u6b64\u884c\u4e3a\u4f1a\u9ed8\u8ba4\u53d1\u751f\u3002\r\n\u4f7f\u7528\u00a0produceExecutable()\u00a0\u4f1a\u751f\u6210\u80fd\u591f\u4ece JavaScript \u751f\u6001\u7cfb\u7edf\u6267\u884c\u7684\u4ee3\u7801\uff1a\u4f7f\u7528\u5176\u81ea\u5df1\u7684\u5165\u53e3\u70b9\u6216\u4f5c\u4e3a JavaScript \u5e93\u3002\u8fd9\u5c06\u751f\u6210\u5b9e\u9645\u7684 JavaScript \u6587\u4ef6\uff0c\u8fd9\u4e9b\u6587\u4ef6\u53ef\u4ee5\u5728\u8282\u70b9\u89e3\u91ca\u5668\u4e2d\u8fd0\u884c\uff0c\u5728 HTML \u9875\u9762\u4e2d\u5d4c\u5165\u5e76\u5728\u6d4f\u89c8\u5668\u4e2d\u6267\u884c\uff0c\u6216\u8005\u7528\u4f5c JavaScript \u9879\u76ee\u7684\u4f9d\u8d56\u9879\u3002\r\n\u8bf7\u6ce8\u610f\uff0c\u5f53\u76ee\u6807\u4e3a\u65b0\u7684 IR \u7f16\u8bd1\u5668\u540e\u7aef\uff08\u66f4\u591a\u8be6\u7ec6\u4fe1\u606f\u5982\u4e0b\uff09 \u65f6\uff0cproduceExecutable()\u00a0\u4f1a\u59cb\u7ec8\u6309\u76ee\u6807\u751f\u6210\u4e00\u4e2a\u5355\u72ec\u7684\u00a0.js\u00a0\u6587\u4ef6\u3002\r\n\u5f53\u524d\uff0c\u4e0d\u652f\u6301\u5728\u591a\u4e2a\u751f\u6210\u7684\u5de5\u4ef6\u4e4b\u95f4\u5220\u9664\u91cd\u590d\u6216\u62c6\u5206\u4ee3\u7801\u3002\u60a8\u53ef\u4ee5\u671f\u5f85\u00a0produceExecutable()\u00a0\u7684\u6b64\u884c\u4e3a\u5728\u540e\u7eed\u91cc\u7a0b\u7891\u4e2d\u53d1\u751f\u53d8\u5316\u3002\u6b64\u9009\u9879\u7684\u547d\u540d\u8fd8\u4e0e\u672a\u6765\u7684\u53d8\u66f4\u6709\u5173\u3002\r\n\r\n\u65b0\u540e\u7aef\r\nKotlin 1.4-M1 \u662f\u5305\u542b\u53ef\u7528\u4e8e Kotlin\/JS \u76ee\u6807\u7684\u65b0 IR \u7f16\u8bd1\u5668\u540e\u7aef\u7684\u7b2c\u4e00\u4e2a\u7248\u672c\u3002\u6b64\u540e\u7aef\u662f\u663e\u8457\u6539\u8fdb\u7684\u4f18\u5316\u7684\u57fa\u7840\uff0c\u4e5f\u662f Kotlin\/JS \u4e0e JavaScript \u548c TypeScript \u4ea4\u4e92\u65b9\u5f0f\u53d8\u66f4\u7684\u51b3\u5b9a\u6027\u56e0\u7d20\u3002\u4e0b\u9762\u91cd\u70b9\u4ecb\u7ecd\u7684\u529f\u80fd\u90fd\u9488\u5bf9\u65b0\u7684 IR 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\u4f9d\u8d56\u9879\u66f4\u65b0\u4e3a\u652f\u6301\u6b64\u65b0\u540e\u7aef\u7684\u7248\u672c\u3002\u7531 JetBrains \u5728 Kotlin 1.4-M1 \u4e2d\u9762\u5411 Kotlin\/JS \u53d1\u5e03\u7684\u5e93\u5df2\u5305\u542b\u4e0e\u65b0\u7684 IR \u7f16\u8bd1\u5668\u540e\u7aef\u642d\u914d\u4f7f\u7528\u800c\u9700\u8981\u7684\u6240\u6709\u5de5\u4ef6\u3002\u4f9d\u8d56\u8fd9\u79cd\u5e93\u65f6\uff0cGradle \u4f1a\u81ea\u52a8\u9009\u62e9\u6b63\u786e\u7684\u5de5\u4ef6\uff08\u5373\u65e0\u9700\u6307\u5b9a IR \u7279\u5b9a\u7684\u5750\u6807\uff09\u3002\u8bf7\u6ce8\u610f\uff0c\u4e00\u4e9b\u5e93\uff08\u5982\u00a0kotlin-wrappers\uff09\u5728\u4f7f\u7528\u65b0\u7684 IR 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KiB\u3002\u5bf9\u4e8e\u66f4\u590d\u6742\u7684\uff08\u6f14\u793a\uff09\u9879\u76ee\uff0c\u4f8b\u5982\u4f7f\u7528\u00a0kotlinx.coroutines\u00a0\u7684\u6b64\u793a\u4f8b\u9879\u76ee\uff0c\u6570\u503c\u4e5f\u4f1a\u663e\u8457\u53d8\u5316\uff0c\u5e0c\u671b\u4e8b\u5b9e\u53ef\u4ee5\u8bf4\u660e\u8fd9\u4e00\u5207\uff1a\r\n\r\n\r\n\r\n\r\n\r\n\r\n\u9ed8\u8ba4\u540e\u7aef\r\n\r\n\r\nIR \u540e\u7aef\r\n\r\n\r\n\r\n\r\n\r\n\r\n\u7f16\u8bd1\u540e\r\n\r\n\r\n3.9 MiB\r\n\r\n\r\n1.1 MiB\r\n\r\n\r\n\r\n\r\nJS DCE \u540e\r\n\r\n\r\n713 KiB\r\n\r\n\r\n430 KiB\r\n\r\n\r\n\r\n\r\n\u6346\u7ed1\u540e\r\n\r\n\r\n329 KiB\r\n\r\n\r\n184 KiB\r\n\r\n\r\n\r\n\r\nZIP \u540e\r\n\r\n\r\n74 KiB\r\n\r\n\r\n40 KiB\r\n\r\n\r\n\r\n\r\n\u5982\u679c\u60a8\u8fd8\u4e0d\u76f8\u4fe1\uff0c\u8bf7\u81ea\u5df1\u8bd5\u8bd5\u3002Kotlin 1.4-M1 \u5df2\u4e3a\u4e24\u79cd\u540e\u7aef\u9ed8\u8ba4\u542f\u7528 DCE \u548c\u6346\u7ed1\uff01\r\n\r\n\u5c06\u58f0\u660e\u5bfc\u51fa\u5230 JavaScript \u4e2d\r\n\u4f7f\u7528 IR \u7f16\u8bd1\u5668\u540e\u7aef\u65f6\uff0c\u6807\u8bb0\u4e3a\u516c\u5f00\u7684\u58f0\u660e\u5c06\u4e0d\u518d\u81ea\u52a8\u5bfc\u51fa\uff08\u5373\u4f7f\u540d\u79f0\u6beb\u65e0\u903b\u8f91\u7684\u7248\u672c\u4e5f\u4e0d\u4f1a\uff09\u3002\u8fd9\u662f\u56e0\u4e3a IR \u7f16\u8bd1\u5668\u7684\u00a0closed-world\u00a0\u6a21\u578b\u5047\u8bbe\u5bfc\u51fa\u7684\u58f0\u660e\u4f1a\u660e\u786e\u5730\u6ce8\u89e3\uff0c\u8ddf\u4e0a\u4e00\u4e2a\u4e00\u6837\uff0c\u8fd9\u4e5f\u662f\u4e00\u4e2a\u6709\u52a9\u4e8e\u4f18\u5316\u7684\u56e0\u7d20\u3002\r\n\u8981\u4f7f JavaScript \u6216 TypeScript \u53ef\u4ee5\u4ece\u5916\u90e8\u4f7f\u7528\u9876\u7ea7\u58f0\u660e\uff0c\u8bf7\u4f7f\u7528\u00a0@JsExport\u00a0\u6ce8\u89e3\u3002\u5728\u4ee5\u4e0b\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u00a0KotlinGreeter\uff08\u53ca\u5176\u65b9\u6cd5\uff09\u548c\u00a0farewell()\u00a0\u53ef\u4ee5\u4ece JavaScript \u4f7f\u7528\uff0c\u4f46\u4f7f\u00a0secretGreeting()\u00a0\u4ec5\u9002\u7528\u4e8e Kotlin\uff1a\r\n\r\npackage blogpost\r\n\r\n@JsExport\r\nclass KotlinGreeter(private val who: String) {\r\n    fun greet() = \"Hello, $who!\"\r\n}\r\n\r\n@JsExport\r\nfun farewell(who: String) = \"Bye, $who!\"\r\n\r\nfun secretGreeting(who: String) = \"Sup, $who!\" \/\/ only from Kotlin!\r\n\u9884\u89c8\uff1aTypeScript \u5b9a\u4e49\r\n\u5728\u65b0\u7684 Kotlin\/JS IR \u7f16\u8bd1\u5668\u4e2d\uff0c\u6211\u4eec\u5f88\u9ad8\u5174\u5c55\u793a\u7684\u53e6\u4e00\u4e2a\u529f\u80fd\u662f\u4ece Kotlin \u4ee3\u7801\u751f\u6210 TypeScript \u5b9a\u4e49\u3002\u5728\u5f00\u53d1\u6df7\u5408\u5e94\u7528\u65f6\uff0cJavaScript \u5de5\u5177\u548c IDE \u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u5b9a\u4e49\u6765\u63d0\u4f9b\u81ea\u52a8\u8865\u5168\u3001\u652f\u6301\u9759\u6001\u5206\u6790\u5668\uff0c\u5e76\u66f4\u8f7b\u677e\u5730\u5728 JS \u548c TS \u9879\u76ee\u4e2d\u5305\u542b Kotlin \u4ee3\u7801\u3002\r\n\u5728\u914d\u7f6e\u4e3a\u4f7f\u7528\u00a0produceExecutable()\u00a0\u7684\u9879\u76ee\u4e2d\uff0c\u5bf9\u4e8e\u4f7f\u7528\u00a0@JsExport\uff08\u53c2\u89c1\u4e0a\u6587\uff09\u6807\u8bb0\u7684\u9876\u7ea7\u58f0\u660e\uff0c\u5c06\u751f\u6210\u5305\u542b TypeScript \u5b9a\u4e49\u7684\u00a0.d.ts\u00a0\u6587\u4ef6\u3002\u5bf9\u4e8e\u4e0a\u9762\u7684\u4ee3\u7801\u6bb5\uff0c\u5b83\u4eec\u662f\u8fd9\u6837\u7684\uff1a\r\n\r\n\/\/ [...]\r\nnamespace blogpost {\r\n    class KotlinGreeter {\r\n        constructor(who: string)\r\n        greet(): string\r\n    }\r\n    function farewell(who: string): string\r\n}\r\n\/\/ [...]\r\n\u5728 Kotlin 1.4-M1 \u4e2d\uff0c\u53ef\u4ee5\u5728\u672a\u4f7f\u7528 webpack \u6253\u5305\u7684\u76f8\u5e94 JavaScript \u4ee3\u7801\u65c1\u7684\u00a0build\/js\/packages\/<package_name>\/kotlin\u00a0\u4e2d\u627e\u5230\u8fd9\u4e9b\u58f0\u660e\u3002\u8bf7\u6ce8\u610f\uff0c\u7531\u4e8e\u73b0\u5728\u53ea\u662f\u9884\u89c8\u7248\u672c\uff0c\u5b83\u4eec\u9ed8\u8ba4\u6ca1\u6709\u6dfb\u52a0\u5230\u00a0distributions\u00a0\u6587\u4ef6\u5939\u4e2d\u3002\u60a8\u53ef\u4ee5\u671f\u5f85\u6b64\u884c\u4e3a\u5c06\u6765\u4f1a\u53d1\u751f\u53d8\u5316\u3002\r\n\r\nBoth \u6a21\u5f0f\r\n\u4e3a\u4e86\u8ba9\u5e93\u7ef4\u62a4\u8005\u66f4\u65b9\u4fbf\u5730\u8fc1\u79fb\u5230\u65b0\u7684 IR \u7f16\u8bd1\u5668\u540e\u7aef\uff0c\u4e3a\u00a0gradle.properties\u00a0\u4e2d\u7684\u00a0kotlin.js.compiler\u00a0\u6807\u5fd7\u5f15\u5165\u4e86\u4e00\u4e2a\u989d\u5916\u8bbe\u7f6e\uff1a\r\n\r\nkotlin.js.compiler=both\r\n\u5728\u00a0both\u00a0\u6a21\u5f0f\u4e0b\uff0c\u4ece\u60a8\u7684\u6e90\u4ee3\u7801\u6784\u5efa\u5e93\u65f6\u4f1a\u4f7f\u7528 IR \u7f16\u8bd1\u5668\u540e\u7aef\u548c\u9ed8\u8ba4\u7f16\u8bd1\u5668\u540e\u7aef\uff08\u56e0\u6b64\u5f97\u540d\uff09\u3002\u8fd9\u610f\u5473\u7740\u4f1a\u751f\u6210\u7528\u4e8e Kotlin IR \u7684\u00a0klib\u00a0\u6587\u4ef6\u548c\u7528\u4e8e\u9ed8\u8ba4\u7f16\u8bd1\u5668\u7684\u00a0js\u00a0\u6587\u4ef6\u3002\u5728\u540c\u4e00\u4e2a Maven \u5750\u6807\u4e0b\u53d1\u5e03\u65f6\uff0cGradle \u4f1a\u6839\u636e\u7528\u4f8b\u81ea\u52a8\u9009\u62e9\u6b63\u786e\u7684\u5de5\u4ef6\uff1a\u4e3a\u65e7\u7f16\u8bd1\u5668\u9009\u62e9\u00a0js\uff0c\u4e3a\u65b0\u7f16\u8bd1\u5668\u9009\u62e9\u00a0klib\u3002\u8fd9\u8868\u793a\u60a8\u53ef\u4ee5\u4f7f\u7528\u65b0\u7684 IR \u7f16\u8bd1\u5668\u540e\u7aef\u7f16\u8bd1\u548c\u53d1\u5e03\u5e93\uff0c\u65b0\u7684 IR \u7f16\u8bd1\u5668\u540e\u7aef\u9002\u7528\u4e8e\u5df2\u5347\u7ea7\u5230 Kotlin 1.4-M1 \u7684\u9879\u76ee\u548c\u4f7f\u7528\u4efb\u610f\u4e00\u79cd\u7f16\u8bd1\u5668\u540e\u7aef\u7684\u9879\u76ee\u3002\u8fd9\u6709\u52a9\u4e8e\u786e\u4fdd\u4ecd\u5728\u4f7f\u7528\u9ed8\u8ba4\u540e\u7aef\u7684\u7528\u6237\u4e0d\u4f1a\u53d7\u5f71\u54cd\u2014\u2014\u5047\u5b9a\u4ed6\u4eec\u5df2\u7ecf\u5c06\u9879\u76ee\u5347\u7ea7\u5230 1.4-M1\u3002\r\n\u8bf7\u6ce8\u610f\uff0c\u5982\u679c\u4f9d\u8d56\u9879\u548c\u60a8\u7684\u9879\u76ee\u4f7f\u7528\u00a0both\u00a0\u6a21\u5f0f\u6784\u5efa\uff0c\u4ecd\u7136\u5b58\u5728\u4f1a\u5bfc\u81f4 IDE \u65e0\u6cd5\u6b63\u5e38\u89e3\u6790\u5e93\u5f15\u7528\u7684\u95ee\u9898\u3002\u6211\u4eec\u5df2\u7ecf\u610f\u8bc6\u5230\u6b64\u95ee\u9898\uff0c\u5c06\u5f88\u5feb\u89e3\u51b3\u3002\r\n\r\nKotlin\/Native\r\n\u9ed8\u8ba4\u652f\u6301 Objective-C \u6cdb\u578b\r\n\u5386\u53f2\u7248\u672c\u7684 Kotlin \u5728 Objective-C \u4e92\u64cd\u4f5c\u4e2d\u4e3a\u6cdb\u578b\u63d0\u4f9b\u4e86\u5b9e\u9a8c\u6027\u652f\u6301\u3002\u8981\u4ece Kotlin \u4ee3\u7801\u4f7f\u7528\u6cdb\u578b\u751f\u6210\u6846\u67b6\u6807\u5934\uff0c\u60a8\u8fc7\u53bb\u5fc5\u987b\u4f7f\u7528\u00a0-Xobjc-generics\u00a0\u7f16\u8bd1\u5668\u9009\u9879\u3002\u5728 1.4-M1 \u4e2d\uff0c\u6b64\u884c\u4e3a\u5df2\u6210\u4e3a\u9ed8\u8ba4\u884c\u4e3a\u3002\u5728\u4e00\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8fd9\u53ef\u80fd\u4f1a\u7834\u574f\u8c03\u7528 Kotlin \u6846\u67b6\u7684\u73b0\u6709 Objective-C \u6216 Swift \u4ee3\u7801\u3002\u8981\u4e0d\u4f7f\u7528\u6cdb\u578b\u7f16\u5199\u6846\u67b6\u6807\u5934\uff0c\u8bf7\u6dfb\u52a0\u00a0-Xno-objc-generics\u00a0\u7f16\u8bd1\u5668\u9009\u9879\u3002\r\n\r\nbinaries.framework {\r\n     freeCompilerArgs += \"-Xno-objc-generics\"\r\n}\r\n\u8bf7\u6ce8\u610f\uff0c\u6587\u6863\u4e2d\u5217\u51fa\u7684\u6240\u6709\u8be6\u7ec6\u4fe1\u606f\u548c\u9650\u5236\u4ecd\u6709\u6548\u3002\r\n\u5728 Objective-C\/Swift \u4e92\u64cd\u4f5c\u4e2d\u5904\u7406\u5f02\u5e38\u7684\u53d8\u66f4\r\n\u5728 1.4 \u4e2d\uff0c\u9488\u5bf9\u8f6c\u6362\u5f02\u5e38\u7684\u65b9\u5f0f\uff0c\u6211\u4eec\u5c06\u7a0d\u5fae\u53d8\u66f4\u4ece Kotlin \u751f\u6210\u7684 Swift API\u3002Kotlin \u548c Swift \u4e4b\u95f4\u7684\u9519\u8bef\u5904\u7406\u5b58\u5728\u7740\u6839\u672c\u7684\u533a\u522b\u3002\u6240\u6709 Kotlin \u5f02\u5e38\u90fd\u672a\u7ecf\u68c0\u67e5\uff0c\u800c Swift \u53ea\u5305\u542b\u68c0\u67e5\u7684\u9519\u8bef\u3002\u56e0\u6b64\uff0c\u8981\u4f7f Swift \u4ee3\u7801\u611f\u77e5\u9884\u671f\u7684\u5f02\u5e38\uff0cKotlin \u51fd\u6570\u5e94\u4f7f\u7528\u00a0@Throws\u00a0\u6ce8\u89e3\u6807\u8bb0\uff0c\u6b64\u6ce8\u89e3\u4f1a\u6307\u5b9a\u4e00\u7cfb\u5217\u6f5c\u5728\u7684\u5f02\u5e38\u7c7b\u3002\r\n\u7f16\u8bd1\u4e3a Swift \u6216 Objective-C \u6846\u67b6\u65f6\uff0c\u62e5\u6709\u6216\u8981\u7ee7\u627f\u00a0@Throws\u00a0\u6ce8\u89e3\u7684\u51fd\u6570\u5728 Objective-C \u4e2d\u8868\u793a\u4e3a\u4ea7\u751f\u65b9\u6cd5\u7684\u00a0NSError*\uff0c\u5728 Swift \u4e2d\u8868\u793a\u4e3a\u00a0throws\u00a0\u65b9\u6cd5\u3002\r\n\u4e4b\u524d\uff0c\u9664\u4e86\u00a0RuntimeException\u00a0\u548c\u00a0Error\u00a0\u4ee5\u5916\u7684\u4efb\u4f55\u5f02\u5e38\u90fd\u4f20\u64ad\u4e3a\u00a0NSError\u3002\u5728 1.4-M1 \u4e2d\uff0c\u6211\u4eec\u66f4\u6539\u4e86\u6b64\u884c\u4e3a\u3002\u73b0\u5728\uff0c\u4ec5\u5bf9\u4e00\u4e9b\u5f02\u5e38\u5f15\u53d1\u00a0NSError\uff0c\u8fd9\u4e9b\u5f02\u5e38\u662f\u6307\u5b9a\u4e3a\u00a0@Throws\u00a0\u6ce8\u89e3\u7684\u53c2\u6570\u7684\u7c7b\u5b9e\u4f8b\uff08\u6216\u5176\u5b50\u7c7b\uff09\u3002\u5f71\u54cd Swift\/Objective-C \u7684\u5176\u4ed6 Kotlin \u5f02\u5e38\u88ab\u8ba4\u4e3a\u672a\u7ecf\u5904\u7406\u4e14\u4f1a\u5f15\u8d77\u7a0b\u5e8f\u7ec8\u6b62\u3002\r\n\r\n\u6027\u80fd\u6539\u8fdb\r\n\u6211\u4eec\u4f1a\u575a\u6301\u4e0d\u61c8\u5730\u6539\u8fdb Kotlin\/Native \u7f16\u8bd1\u548c\u6267\u884c\u7684\u6574\u4f53\u6027\u80fd\u3002\u5728 1.4-M1 \u4e2d\uff0c\u6211\u4eec\u4f1a\u4e3a\u60a8\u63d0\u4f9b\u65b0\u7684\u5bf9\u8c61\u5206\u914d\u5668\uff0c\u5b83\u5728\u4e00\u4e9b\u57fa\u51c6\u4e0a\u80fd\u591f\u4ee5\u9ad8\u8fbe\u4e24\u500d\u7684\u901f\u5ea6\u8fd0\u884c\u3002\u76ee\u524d\uff0c\u65b0\u5206\u914d\u5668\u4ecd\u5904\u4e8e\u5b9e\u9a8c\u9636\u6bb5\uff0c\u9ed8\u8ba4\u4e0d\u4f1a\u4f7f\u7528\uff1b\u60a8\u53ef\u4ee5\u4f7f\u7528\u00a0-Xallocator=mimalloc\u00a0\u7f16\u8bd1\u5668\u9009\u9879\u5207\u6362\u5230\u6b64\u5206\u914d\u5668\u3002\r\n\r\n\u517c\u5bb9\u6027\r\n\u8bf7\u6ce8\u610f\uff0c\u5728\u4e00\u4e9b\u6781\u7aef\u60c5\u51b5\u4e0b\uff0cKotlin 1.4 \u4e0d\u4f1a\u5411\u540e\u517c\u5bb9 1.3\u3002\u6240\u6709\u8fd9\u4e9b\u60c5\u51b5\u90fd\u5df2\u63a5\u53d7\u8bed\u8a00\u59d4\u5458\u4f1a\u7684\u4ed4\u7ec6\u68c0\u67e5\uff0c\u5c06\u5217\u5728\u201c\u517c\u5bb9\u6027\u6307\u5357\u201d\uff08\u7c7b\u4f3c\u4e8e\u6b64\u6307\u5357\uff09\u4e2d\u3002\u5f53\u524d\uff0c\u60a8\u53ef\u4ee5\u5728\u00a0YouTrack\u00a0\u4e2d\u627e\u5230\u6b64\u5217\u8868\u3002\r\n\u91cd\u8f7d\u89e3\u6790\u89c4\u5219\u53ef\u80fd\u4f1a\u6709\u5c0f\u5e45\u53d8\u5316\u3002\u5982\u679c\u60a8\u6709\u591a\u4e2a\u5305\u542b\u76f8\u540c\u540d\u79f0\u548c\u4e0d\u540c\u7b7e\u540d\u7684\u51fd\u6570\uff0c\u5728 Kotlin 1.4 \u4e2d\u8c03\u7528\u7684\u51fd\u6570\u53ef\u80fd\u4f1a\u4e0e\u5728 Kotlin 1.3 \u4e2d\u9009\u62e9\u7684\u51fd\u6570\u4e0d\u540c\u3002\u4e0d\u8fc7\uff0c\u8fd9\u53ea\u4f1a\u53d1\u751f\u5728\u4e00\u4e9b\u6781\u7aef\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u8ba4\u4e3a\u5b9e\u9645\u53ea\u4f1a\u5728\u6781\u5c11\u7684\u60c5\u51b5\u4e0b\u51fa\u73b0\u8fd9\u79cd\u73b0\u8c61\u3002\u6211\u4eec\u8fd8\u5047\u8bbe\u91cd\u8f7d\u51fd\u6570\u5728\u5b9e\u9645\u4e2d\u884c\u4e3a\u7c7b\u4f3c\uff0c\u6700\u7ec8\u9010\u4e2a\u8c03\u7528\uff0c\u56e0\u6b64\uff0c\u8fd9\u4e9b\u53d8\u66f4\u4e0d\u4f1a\u5f71\u54cd\u7a0b\u5e8f\u884c\u4e3a\u3002\u4e0d\u8fc7\uff0c\u5982\u679c\u60a8\u60f3\u901a\u8fc7\u6cdb\u578b\u7f16\u5199\u68d8\u624b\u7684\u4ee3\u7801\uff0c\u5e76\u5177\u6709\u4e0d\u540c\u7ea7\u522b\u7684\u591a\u4e2a\u91cd\u8f7d\uff0c\u8bf7\u52a0\u4ee5\u6ce8\u610f\u3002\u6240\u6709\u8fd9\u4e9b\u60c5\u51b5\u90fd\u4f1a\u5217\u5728\u4e0a\u8ff0\u517c\u5bb9\u6027\u6307\u5357\u4e2d\u3002\r\n\r\n\u9884\u53d1\u5e03\u8bf4\u660e\r\n\u8bf7\u6ce8\u610f\uff0c\u540e\u5411\u517c\u5bb9\u6027\u4fdd\u8bc1\u4e0d\u6db5\u76d6\u9884\u53d1\u5e03\u7248\u672c\u3002\u529f\u80fd\u548c API \u5728\u540e\u7eed\u7248\u672c\u4e2d\u53ef\u80fd\u53d1\u751f\u53d8\u5316\u3002\u5728\u6211\u4eec\u53d1\u5e03\u6700\u7ec8 RC \u65f6\uff0c\u9884\u53d1\u5e03\u7248\u672c\u4ea7\u751f\u7684\u6240\u6709\u4e8c\u8fdb\u5236\u6587\u4ef6\u90fd\u4f1a\u88ab\u7f16\u8bd1\u5668\u7981\u6b62\uff0c\u60a8\u9700\u8981\u91cd\u65b0\u7f16\u8bd1\u901a\u8fc7 1.4\u2011Mx \u7f16\u8bd1\u7684\u6240\u6709\u5185\u5bb9\u3002\r\n\u5982\u4f55\u8bd5\u7528\r\n\u548c\u5f80\u5e38\u4e00\u6837\uff0c\u60a8\u53ef\u4ee5\u5728play.kotl.in\u4e0a\u5728\u7ebf\u8bd5\u8bd5Kotlin\r\n\u5728\u00a0IntelliJ IDEA\u00a0\u548c\u00a0Android Studio\u00a0\u4e2d\uff0c\u60a8\u53ef\u4ee5\u5c06 Kotlin \u63d2\u4ef6\u66f4\u65b0\u4e3a 1.4-M1\u3002\u67e5\u770b\u5982\u4f55\u6267\u884c\u6b64\u64cd\u4f5c\u3002\r\n\u5982\u679c\u60a8\u60f3\u5904\u7406\u5728\u5b89\u88c5\u8be5\u9884\u89c8\u7248\u4e4b\u524d\u521b\u5efa\u7684\u73b0\u6709\u9879\u76ee\uff0c\u5219\u9700\u8981\u5728 Gradle \u6216 Maven \u4e2d\u9488\u5bf9\u9884\u89c8\u7248\u914d\u7f6e\u60a8\u7684\u6784\u5efa\u3002\r\n\u60a8\u53ef\u4ee5\u4ece\u00a0Github \u53d1\u5e03\u9875\u9762\u4e0b\u8f7d\u547d\u4ee4\u884c\u7f16\u8bd1\u5668\u3002\r\n\u60a8\u53ef\u4ee5\u4f7f\u7528\u968f\u6b64\u7248\u672c\u4e00\u8d77\u53d1\u5e03\u7684\u4ee5\u4e0b\u5e93\uff1a\r\n\r\n\r\n\t\r\nkotlinx.atomicfu\u00a0\u7248\u672c\uff1a0.14.2-1.4-M1\r\n\r\n\t\r\nkotlinx.coroutines\u00a0\u7248\u672c\uff1a1.3.5-1.4-M1\r\n\r\n\t\r\nkotlinx.serialization\u00a0\u7248\u672c\uff1a0.20.0-1.4-M1\r\n\r\n\t\r\nktor\u00a0\u7248\u672c\uff1a1.3.2-1.4-M1\r\n\r\n\r\n\u60a8\u4e5f\u53ef\u4ee5\u5728\u6b64\u5904\u627e\u5230\u7248\u672c\u8be6\u7ec6\u4fe1\u606f\u548c\u517c\u5bb9\u5e93\u7684\u5217\u8868\u3002\r\n\r\n\u5206\u4eab\u60a8\u7684\u53cd\u9988\r\n\u5982\u679c\u60a8\u53d1\u73b0\u9519\u8bef\u5e76\u5728\u00a0YouTrack\u00a0\u95ee\u9898\u8ddf\u8e2a\u5668\u4e2d\u62a5\u544a\uff0c\u6211\u4eec\u5c06\u4e0d\u80dc\u611f\u6fc0\u3002\u6211\u4eec\u5c06\u5c3d\u529b\u5728\u6700\u7ec8\u7248\u672c\u4e4b\u524d\u4fee\u590d\u6240\u6709\u91cd\u8981\u95ee\u9898\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u60a8\u4e0d\u7528\u7b49\u5230\u4e0b\u4e00\u4e2a Kotlin \u7248\u672c\u5373\u53ef\u770b\u5230\u95ee\u9898\u5f97\u5230\u89e3\u51b3\u3002\r\n\u5982\u679c\u60a8\u6709\u4efb\u4f55\u95ee\u9898\u5e76\u60f3\u53c2\u4e0e\u8ba8\u8bba\uff0c\u6b22\u8fce\u52a0\u5165\u00a0Kotlin Slack\u00a0\u4e2d\u7684\u00a0#eap\u00a0\u9891\u9053\uff08\u5728\u6b64\u5904\u83b7\u53d6\u9080\u8bf7\uff09\u3002\u5728\u6b64\u9891\u9053\u4e2d\uff0c\u60a8\u8fd8\u53ef\u4ee5\u83b7\u53d6\u6709\u5173\u65b0\u9884\u89c8\u7248\u672c\u7684\u901a\u77e5\u3002\r\n\r\nLet's Kotlin!\r\n\u5916\u90e8\u8d21\u732e\r\n\u7279\u522b\u611f\u8c22\u00a0Zac Sweers\u00a0\u5c06 Proguard \u914d\u7f6e\u5d4c\u5165\u00a0kotlin-reflect\u00a0\u7684\u8d21\u732e\u3002\r\n\u6211\u4eec\u8981\u611f\u8c22\u6240\u6709\u7684\u5916\u90e8\u8d21\u732e\u8005\uff0c\u6b64\u7248\u672c\u4e2d\u5305\u542b\u4e86\u4ed6\u4eec\u7684\u62c9\u53d6\u8bf7\u6c42\uff1a\r\n\r\n\r\n\tSteven Sch\u00e4fer\r\n\tToshiaki Kameyama\r\n\tpyos\r\n\tMads Ager\r\n\tMark Punzalan\r\n\tJuan Chen\r\n\tKristoffer Andersen\r\n\tAlfredo Delli Bovi\r\n\tJinseong Jeon\r\n\tJonathan Leitschuh\r\n\tSebastian Schuberth\r\n\tIvan Gavrilovic\r\n\tDavid Schreiber-Ranner\r\n\tMiguel Serra\r\n\tAlex Chmyr\r\n\tFleshgrinder\r\n\tAleksey Kladov\r\n\tWill Boyd\r\n\tDominic Fischer\r\n\tKenji Tomita\r\n\tSt\u00e9phane Nicolas\r\n\tTillmann Berg\r\n\tKevin Bierhoff\r\n\tTsvetan\r\n\r\n\u539f\u6587\u53d1\u8868\u4e8e 2020 \u5e74 3 \u6708 20 \u65e5\uff0c\u4f5c\u8005\u00a0Sebastian Aigner","protected":false},"excerpt":{"rendered":"\u6211\u4eec\u9ad8\u5174\u5730\u5ba3\u5e03\u65b0\u7684\u4e3b\u8981\u7248\u672c\u7684\u7b2c\u4e00\u4e2a\u9884\u89c8\u7248\u672c\uff1aKotlin 1.4-M1\u3002\u51e0\u4e2a\u6708\u4ee5\u524d\uff0c\u6211\u4eec\u9488\u5bf9\u00a0Kotlin 1.4 \u503c\u5f97\u671f\u5f85\u7684\u4eae\u70b9\u53d1\u5e03\u4e86\u4e00\u5219\u516c\u544a\u3002\u968f\u7740\u53d1\u5e03\u4e34\u8fd1\uff0c\u6211\u4eec\u73b0\u5728\u63d0\u4f9b\u4e00\u4e2a\u9884\u89c8\u7248\u672c\uff0c\u8ba9\u5927\u5bb6\u80fd\u591f\u8bd5\u7528\u4e00\u4e9b\u65b0\u529f\u80fd\u3002\u5728\u8fd9\u7bc7\u535a\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u91cd\u70b9\u4ecb\u7ecd 1.4-M1 \u4e2d\u7684\u4ee5\u4e0b\u65b0\u529f\u80fd\u548c\u4e3b\u8981\u6539\u8fdb\uff1a\u9ed8\u8ba4\u542f\u7528\u4e00\u79cd\u529f\u80fd\u66f4\u52a0\u5f3a\u5927\u7684\u65b0\u7c7b\u578b\u63a8\u7406\u7b97\u6cd5\u3002\u534f\u5b9a\u73b0\u5728\u53ef\u7528\u4e8e final \u6210\u5458\u51fd\u6570\u3002","protected":false},"author":{"name":"Lei","link":"https:\/\/blog.jetbrains.com\/zh-hans\/author\/lei-zhaojetbrains-com"},"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[89],"tags":[5320],"cross-post-tag":[],"acf":[],"featured_image":null,"_links":{"self":[{"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/posts\/34497"}],"collection":[{"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/users\/814"},{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/users\/814"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/comments?post=34497"}],"version-history":[{"count":0,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/posts\/34497\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/media?parent=34497"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/categories?post=34497"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/tags?post=34497"},{"taxonomy":"cross-post-tag","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/cross-post-tag?post=34497"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}