{"id":35232,"date":"2020-04-23T17:30:41","date_gmt":"2020-04-23T08:30:41","guid":{"rendered":"https:\/\/blog.jetbrains.com\/jp\/?p=3001"},"modified":"2020-04-23T20:34:40","modified_gmt":"2020-04-23T11:34:40","slug":"3001","status":"publish","type":"post","link":"https:\/\/blog.jetbrains.com\/ja\/2020\/04\/23\/3001\/","title":{"rendered":"Kotlin 1.4-M1\u30ea\u30ea\u30fc\u30b9\u306e\u7d39\u4ecb"},"content":{"rendered":"\u3053\u3061\u3089\u306f2020\u5e743\u670823\u65e5\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305fKotlin 1.4-M1 Released\u306e\u65e5\u672c\u8a9e\u8a33\u3067\u3059\u3002\r\n\r\n\u65b0\u3057\u3044\u30e1\u30b8\u30e3\u30fc\u30ea\u30ea\u30fc\u30b9\u306e\u6700\u521d\u306e\u30d7\u30ec\u30d3\u30e5\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u300cKotlin 1.4-M1\u300d\u304c\u5229\u7528\u53ef\u80fd\u3067\u3059\u3002\r\n\r\nKotlin 1.4\u306b\u671f\u5f85\u3055\u308c\u308b\u5185\u5bb9\u306b\u3064\u3044\u3066\u306f\u3001\u6570\u304b\u6708\u524d\u306b\u767a\u8868\u307e\u3057\u305f\u304c\u3001 \u30ea\u30ea\u30fc\u30b9\u6642\u671f\u304c\u8fd1\u4ed8\u304f\u306b\u3042\u305f\u308a\u3001\u30d7\u30ec\u30d3\u30e5\u30fc\u7248\u3092\u516c\u958b\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u4e00\u90e8\u306e\u65b0\u3057\u3044\u6a5f\u80fd\u3092\u7686\u3055\u3093\u81ea\u8eab\u3067\u304a\u8a66\u3057\u3044\u305f\u3060\u3051\u307e\u3059\u3002\r\n\r\n\r\n\r\n\u3053\u306e\u8a18\u4e8b\u3067\u306f\u30011.4-M1\u306b\u8ffd\u52a0\u3055\u308c\u305f\u65b0\u3057\u3044\u6a5f\u80fd\u3068\u4e3b\u306a\u6539\u5584\u5185\u5bb9\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\r\n\r\n\t\u3055\u3089\u306b\u5f37\u5316\u3055\u308c\u305f\u65b0\u3057\u3044\u578b\u63a8\u8ad6\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u6709\u52b9\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u3002\r\n\t\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u3092final\u30e1\u30f3\u30d0\u95a2\u6570\u3067\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\r\n\tKotlin\/JVM\u30b3\u30f3\u30d1\u30a4\u30e9\u3067\u3001Java 8\u4ee5\u964d\u306e\u30bf\u30fc\u30b2\u30c3\u30c8\u306e\u578b\u306e\u6ce8\u91c8\u3092\u30d0\u30a4\u30c8\u30b3\u30fc\u30c9\u306b\u751f\u6210\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\r\n\tKotlin\/JS\u306e\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u304c\u65b0\u3057\u304f\u306a\u308a\u3001\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u306e\u751f\u6210\u304c\u5927\u304d\u304f\u6539\u5584\u3055\u308c\u307e\u3057\u305f\u3002\r\n\t\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u304c\u5927\u5e45\u306b\u5909\u66f4\u3055\u308c\u307e\u3057\u305f\u3002\u5ec3\u6b62\u30b5\u30a4\u30af\u30eb\u306f\u5b8c\u4e86\u3057\u3001\u307b\u304b\u306e\u4e00\u90e8\u304c\u5ec3\u6b62\u4e88\u5b9a\u306b\u306a\u308a\u307e\u3057\u305f\u3002\r\n\r\n\u5b8c\u5168\u306a\u5909\u66f4\u30ea\u30b9\u30c8\u306f\u5909\u66f4\u30ed\u30b0\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002 \u3053\u308c\u307e\u3067\u540c\u69d8\u3001\u793e\u5916\u8ca2\u732e\u8005\u306e\u7686\u69d8\u304b\u3089\u306e\u3054\u5354\u529b\u306b\u6df1\u304f\u611f\u8b1d\u3044\u305f\u3057\u307e\u3059\u3002\r\n\r\n\u30d7\u30ec\u30d3\u30e5\u30fc\u7248\u3092\u305c\u3072\u304a\u8a66\u3057\u304f\u3060\u3055\u3044\u3002\u8ab2\u984c\u30c8\u30e9\u30c3\u30ab\u30fc\u306b\u63d0\u51fa\u3055\u308c\u308b\u7686\u69d8\u304b\u3089\u306e\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u3092\u697d\u3057\u307f\u306b\u304a\u5f85\u3061\u3057\u3066\u3044\u307e\u3059\u3002\r\n\r\n \r\n\u3055\u3089\u306b\u30d1\u30ef\u30d5\u30eb\u306b\u306a\u3063\u305f\u578b\u63a8\u8ad6\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\r\nKotlin 1.4\u306b\u306f\u3001\u3088\u308a\u5f37\u529b\u306a\u578b\u63a8\u8ad6\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u304c\u63a1\u7528\u3055\u308c\u307e\u3057\u305f\u3002 \u3053\u306e\u65b0\u3057\u3044\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092Kotlin 1.3\u3067\u4f7f\u7528\u3059\u308b\u306b\u306f\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u30fb\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3057\u305f\u304c\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u5909\u66f4\u3055\u308c\u3066\u3044\u307e\u3059\u3002 \u65b0\u3057\u3044\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u4fee\u6b63\u3055\u308c\u305f\u3059\u3079\u3066\u306e\u8ab2\u984c\u306b\u3064\u3044\u3066\u306f\u3001YouTrack\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002 \u3053\u306e\u30d6\u30ed\u30b0\u8a18\u4e8b\u3067\u306f\u3001\u6700\u3082\u5927\u304d\u306a\u5909\u66f4\u70b9\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002\r\nKotlin\u95a2\u6570\u3068\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306eSAM\u5909\u63db\r\nSAM\u95a2\u6570\u3092\u4f7f\u3046\u3068\u30011\u3064\u306e\u300cSingle Abstract Method\u300d\u3092\u4f7f\u3063\u305f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304c\u671f\u5f85\u3055\u308c\u308b\u5834\u5408\u306b\u3001\u30e9\u30e0\u30c0\u5f0f\u3092\u6e21\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u4ee5\u524d\u306f\u3001Kotlin\u3067Java\u30e1\u30bd\u30c3\u30c9\u3068Java\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u4f7f\u3046\u5834\u5408\u306b\u306f\u3001SAM\u5909\u63db\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3057\u304b\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u304c\u3001\u73fe\u5728\u306f\u3001Kotlin\u95a2\u6570\u3068\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3082\u5408\u308f\u305b\u3066\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\r\n\r\nKotlin\u306fKotlin\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306eSAM\u5909\u63db\u3092\u30b5\u30dd\u30fc\u30c8\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002 \u305f\u3060\u3057\u3001Java\u3068\u306f\u7570\u306a\u308a\u3001\u95a2\u6570\u578b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u660e\u793a\u7684\u306b\u30de\u30fc\u30af\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 \u300cfun\u300d\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u3063\u3066\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u30de\u30fc\u30af\u3059\u308b\u3068\u3001\u3053\u306e\u3088\u3046\u306a\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304c\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u671f\u5f85\u3055\u308c\u308b\u5834\u5408\u306b\u3001\u30e9\u30e0\u30c0\u5f0f\u3092\u5f15\u6570\u3068\u3057\u3066\u6e21\u305b\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\r\nfun interface Action {\r\n    fun run()\r\n}\r\n\r\nfun runAction(a: Action) = a.run()\r\n\r\nfun main() {\r\n    runAction {\r\n        println(\"Hello, Kotlin 1.4!\")\r\n    }\r\n}\r\n\r\n\u3053\u308c\u306b\u95a2\u3059\u308b\u8a73\u3057\u3044\u60c5\u5831\u306f\u3001\u4ee5\u524d\u306e\u30d6\u30ed\u30b0\u8a18\u4e8b\u3067\u304a\u8aad\u307f\u304f\u3060\u3055\u3044\u3002\r\n\r\nKotlin\u306f\u5f53\u521d\u304b\u3089Java\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306eSAM\u5909\u63db\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u304d\u307e\u3057\u305f\u304c\u3001\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u306a\u3044\u30b1\u30fc\u30b9\u304c1\u3064\u3060\u3051\u3042\u308a\u3001\u305d\u308c\u306b\u3088\u308a\u65e2\u5b58\u306eJava\u30e9\u30a4\u30d6\u30e9\u30ea\u304c\u304b\u304b\u308f\u308b\u5834\u5408\u306b\u9762\u5012\u306a\u5834\u5408\u304c\u3042\u308a\u307e\u3057\u305f\u3002 2\u3064\u306eSAM\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u53d6\u308bJava\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u305f\u5834\u5408\u3001\u4e21\u65b9\u306e\u5f15\u6570\u304c\u30e9\u30e0\u30c0\u5f0f\u304b\u666e\u901a\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u3044\u305a\u308c\u304b\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002 \u30e9\u30e0\u30c0\u5f0f\u3068\u3082\u30461\u3064\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6df7\u5728\u3059\u308b1\u3064\u306e\u5f15\u6570\u30921\u3064\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3057\u3066\u6e21\u3059\u3053\u3068\u306f\u3067\u304d\u306a\u304b\u3063\u305f\u306e\u3067\u3059\u3002 \u65b0\u3057\u3044\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u306f\u3053\u306e\u8ab2\u984c\u304c\u4fee\u6b63\u3055\u308c\u3001\u3069\u306e\u3088\u3046\u306a\u72b6\u6cc1\u3067\u3082SAM\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u4ee3\u308f\u308a\u306b\u30e9\u30e0\u30c0\u5f0f\u3092\u6e21\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u308c\u304c\u5f53\u7136\u306e\u52d5\u4f5c\u3067\u3059\u3002\r\n\u3088\u308a\u591a\u304f\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3067\u81ea\u52d5\u7684\u306b\u578b\u3092\u63a8\u8ad6\r\n\u65b0\u3057\u3044\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u306f\u3001\u4ee5\u524d\u306e\u63a8\u8ad6\u3067\u306f\u660e\u793a\u7684\u306b\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u306e\u3042\u3063\u305f\u6570\u591a\u304f\u306e\u30b1\u30fc\u30b9\u3067\u3082\u578b\u3092\u63a8\u8ad6\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002 \u305f\u3068\u3048\u3070\u3001\u6b21\u306e\u4f8b\u3067\u306f\u3001\u30e9\u30e0\u30c0\u5f0f\u306e\u30d1\u30e9\u30e1\u30fc\u30bf it \u306e\u578b\u306f\u3001\u6b63\u3057\u304f String? \u306b\u63a8\u8ad6\u3055\u308c\u3066\u3044\u307e\u3059\u3002\r\n\/\/\u30b5\u30f3\u30d7\u30eb\u958b\u59cb\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\/\/\u30b5\u30f3\u30d7\u30eb\u7d42\u4e86\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\r\nKotlin 1.3\u3067\u306f\u3001\u660e\u793a\u7684\u306a\u30e9\u30e0\u30c0\u5f0f\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u5c0e\u5165\u3059\u308b\u304b\u3001 to \u3092\u660e\u793a\u7684\u306a\u6c4e\u7528\u5f15\u6570\u3092\u4f7f\u3063\u305f Pair \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306b\u5909\u3048\u306a\u3051\u308c\u3070\u52d5\u4f5c\u3057\u307e\u305b\u3093\u3067\u3057\u305f\u3002\r\n\u30e9\u30e0\u30c0\u5f0f\u306e\u6700\u5f8c\u306e\u5f0f\u306e\u30b9\u30de\u30fc\u30c8\u30ad\u30e3\u30b9\u30c8\r\nKotlin 1.3\u3067\u306f\u3001\u30e9\u30e0\u30c0\u5f0f\u5185\u306e\u6700\u5f8c\u306e\u5f0f\u306f\u3001\u671f\u5f85\u3055\u308c\u308b\u578b\u3092\u6307\u5b9a\u3057\u306a\u3044\u9650\u308a\u3001\u30b9\u30de\u30fc\u30c8\u30fb\u30ad\u30e3\u30b9\u30c8\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002 \u305d\u306e\u305f\u3081\u3001\u6b21\u306e\u4f8b\u3067\u306f\u3001Kotlin 1.3\u306f String? \u3092 result \u5909\u6570\u306e\u578b\u3068\u3057\u3066\u63a8\u8ad6\u3057\u3066\u3044\u307e\u3059\u3002\r\nval result = run {\r\n    var str = currentValue()\r\n    if (str == null) {\r\n        str = \"test\"\r\n    }\r\n    str \/\/ Kotlin\u30b3\u30f3\u30d1\u30a4\u30e9\u306f str \u304c null \u3067\u306a\u3044\u3068\u8a8d\u8b58\r\n}\r\n\/\/ 'result' \u306e\u578b\u306f String? \uff08Kotlin 1.3\uff09\u3067Kotlin 1.4\u306e\u5834\u5408\u306f String\r\n\r\nKotlin 1.4\u3067\u306f\u3001\u65b0\u3057\u3044\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u5c0e\u5165\u306b\u3088\u308a\u3001\u30e9\u30e0\u30c0\u5f0f\u306e\u6700\u5f8c\u306e\u5f0f\u304c\u30b9\u30de\u30fc\u30c8\u30ad\u30e3\u30b9\u30c8\u3055\u308c\u307e\u3059\u3002\u30e9\u30e0\u30c0\u578b\u306e\u63a8\u8ad6\u306b\u306f\u3001\u3053\u306e\u65b0\u3057\u3044\u3001\u3088\u308a\u6b63\u78ba\u306a\u578b\u304c\u4f7f\u7528\u3055\u308c\u308b\u305f\u3081\u3001 result \u5909\u6570\u306e\u578b\u306f String \u306b\u306a\u308a\u307e\u3059\u3002\r\n\r\nKotlin 1.3\u3067\u3053\u3046\u3044\u3063\u305f\u30b1\u30fc\u30b9\u3092\u52d5\u4f5c\u3055\u305b\u308b\u306b\u306f\u3001\u660e\u793a\u7684\u306a\u30ad\u30e3\u30b9\u30c8\uff08!! \u307e\u305f\u306f as String \u306e\u3088\u3046\u306a\u578b\u30ad\u30e3\u30b9\u30c8\uff09\u3092\u8ffd\u52a0\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3057\u305f\u304c\u3001\u3053\u308c\u3089\u306f\u4e0d\u8981\u306b\u306a\u308a\u307e\u3057\u305f\u3002\r\n\u547c\u3073\u51fa\u3057\u53ef\u80fd\u53c2\u7167\u306e\u30b9\u30de\u30fc\u30c8\u30ad\u30e3\u30b9\u30c8\r\nKotlin 1.3\u3067\u306f\u3001\u30b9\u30de\u30fc\u30c8\u30ad\u30e3\u30b9\u30c8\u578b\u306e\u30e1\u30f3\u30d0\u53c2\u7167\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002 \u4ee5\u4e0b\u3092\u884c\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\uff1a\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\n\/\/\u30b5\u30f3\u30d7\u30eb\u958b\u59cb\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\/\/\u30b5\u30f3\u30d7\u30eb\u7d42\u4e86\r\n\r\nfun main() {\r\n    perform(Cat())\r\n}\r\n\r\nanimal\u5909\u6570\u304c\u7279\u5b9a\u306e\u578b Cat \u3068 Dog \u306b\u30b9\u30de\u30fc\u30c8\u30ad\u30e3\u30b9\u30c8\u3055\u308c\u305f\u5f8c\u306b\u3001\u5225\u306e\u30e1\u30f3\u30d0\u53c2\u7167 animal::meow \u3068 animal::woof \u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u578b\u30c1\u30a7\u30c3\u30af\u3092\u5b9f\u65bd\u3057\u305f\u5f8c\u3001\u30b5\u30d6\u30bf\u30a4\u30d7\u306b\u5bfe\u5fdc\u3059\u308b\u30e1\u30f3\u30d0\u53c2\u7167\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059\u3002\r\n\u547c\u3073\u51fa\u3057\u53ef\u80fd\u53c2\u7167\u306e\u63a8\u8ad6\u306e\u6539\u5584\r\n\u95a2\u6570\u3078\u306e\u547c\u3073\u51fa\u3057\u53ef\u80fd\u53c2\u7167\u3092\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u5f15\u6570\u5024\u3092\u4f7f\u3063\u3066\u3088\u308a\u4fbf\u5229\u306b\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002 \u305f\u3068\u3048\u3070\u3001\u6b21\u306e foo \u95a2\u6570\u3078\u306e\u547c\u3073\u51fa\u3057\u53ef\u80fd\u53c2\u7167\u306f\u30011\u3064\u306e Int \u5f15\u6570\u3092\u53d6\u308b\u304b\u5f15\u6570\u3092\u4f55\u3082\u53d6\u3089\u306a\u3044\u306e\u4e21\u65b9\u306b\u89e3\u91c8\u3067\u304d\u307e\u3059\u3002\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\r\n\u30c7\u30ea\u30b2\u30fc\u30c8\u578b\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u63a8\u8ad6\u3092\u6539\u5584\r\nby \u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u5f8c\u306b\u7d9a\u304f\u30c7\u30ea\u30b2\u30fc\u30c8\u5f0f\u3092\u89e3\u6790\u3059\u308b\u5834\u5408\u3001\u30c7\u30ea\u30b2\u30fc\u30c8\u578b\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u578b\u306f\u8003\u616e\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3067\u3057\u305f\u3002 \u305f\u3068\u3048\u3070\u3001\u4ee5\u524d\u306f\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u307e\u305b\u3093\u3067\u3057\u305f\u304c\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u306f old \u3068 new \u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u578b\u3092 String? \u3068\u3057\u3066\u6b63\u3057\u304f\u63a8\u8ad6\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\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\u8a00\u8a9e\u306b\u95a2\u3059\u308b\u5909\u66f4\r\n\u8a00\u8a9e\u306b\u95a2\u3059\u308b\u5909\u66f4\u5185\u5bb9\u306b\u3064\u3044\u3066\u306f\u3001\u305d\u306e\u307b\u3068\u3093\u3069\u304c\u4ee5\u524d\u306e\u30d6\u30ed\u30b0\u8a18\u4e8b\u3067\u8aac\u660e\u3055\u308c\u3066\u3044\u307e\u3059\u3002\r\n\r\n\tKotlin\u30af\u30e9\u30b9\u306eSAM\u5909\u63db\r\n\t\u540d\u524d\u4ed8\u304d\u5f15\u6570\u3068\u30dd\u30b8\u30b7\u30e7\u30ca\u30eb\u5f15\u6570\u306e\u6df7\u5728\r\n\t\u30c7\u30ea\u30b2\u30fc\u30c8\u578b\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u6700\u9069\u5316\r\n\t\u672b\u5c3e\u306e\u30ab\u30f3\u30de\r\n\twhen\u6587\u5185\u306ebreak\u6587\u3068continue\u6587\r\n\t\u672b\u5c3e\u518d\u8d77\u95a2\u6570\u306e\u5909\u66f4\r\n\r\n\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u306b\u95a2\u3059\u308b\u5c0f\u3055\u306a\u6539\u5584\u70b9\u3092\u4e00\u90e8\u8aac\u660e\u3057\u307e\u3059\u3002\r\n\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u306e\u30b5\u30dd\u30fc\u30c8\r\n\u30ab\u30b9\u30bf\u30e0\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u3092\u5b9a\u7fa9\u3059\u308b\u69cb\u6587\u306f\u5b9f\u9a13\u6bb5\u968e\u306b\u3042\u308a\u307e\u3059\u304c\u3001\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u304c\u5f79\u306b\u7acb\u3064\u3088\u3046\u306a\u65b0\u3057\u3044\u30b1\u30fc\u30b9\u30922\u3064\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3057\u305f\u3002\r\n\r\n\u5177\u4f53\u5316\uff08reified\uff09\u3055\u308c\u305f\u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u578b\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u4f7f\u3063\u3066\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u3092\u5b9a\u7fa9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002 \u305f\u3068\u3048\u3070\u3001assertIsInstance \u95a2\u6570\u3067\u6b21\u306e\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002\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\r\n\u578b\u30d1\u30e9\u30e1\u30fc\u30bf T \u304c\u5177\u4f53\u5316\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u95a2\u6570\u672c\u4f53\u3067\u578b\u3092\u30c1\u30a7\u30c3\u30af\u3067\u304d\u307e\u3059\u3002 \u3053\u308c\u306f\u3001\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u5185\u3067\u3082\u53ef\u80fd\u306b\u306a\u308a\u307e\u3057\u305f\u3002 \u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u4f7f\u3063\u305f\u4f3c\u305f\u3088\u3046\u306a\u95a2\u6570\u306f\u3001\u5f8c\u65e5\u3001kotlin.test \u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u8ffd\u52a0\u3055\u308c\u308b\u4e88\u5b9a\u3067\u3059\u3002\r\n\r\n\u307e\u305f\u3001final \u30e1\u30f3\u30d0\u3067\u30ab\u30b9\u30bf\u30e0\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u3092\u5b9a\u7fa9\u3067\u304d\u308b\u3088\u3046\u306b\u3082\u306a\u308a\u307e\u3057\u305f\u3002 \u4ee5\u524d\u306f\u3001\u968e\u5c64\u306e\u4e00\u90e8\u306e\u30e1\u30f3\u30d0\u306b\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u306f\u3001\u5bfe\u5fdc\u3059\u308b\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u306e\u968e\u5c64\u3092\u6697\u306b\u793a\u3059\u3053\u3068\u306b\u306a\u308b\u305f\u3081\u3001\u30e1\u30f3\u30d0\u95a2\u6570\u306e\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u306f\u5b8c\u5168\u306b\u7981\u3058\u3089\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u73fe\u5728\u3067\u3082\u3001\u8a2d\u8a08\u3068\u8b70\u8ad6\u304c\u7d9a\u3044\u3066\u3044\u307e\u3059\u3002 \u305f\u3060\u3057\u3001\u30e1\u30f3\u30d0\u95a2\u6570\u304c final \u3067\u3042\u308a\u3001\u307b\u304b\u306e\u95a2\u6570\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3057\u306a\u3044\u306e\u3067\u3042\u308c\u3070\u3001\u305d\u308c\u306b\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u3092\u5b9a\u7fa9\u3057\u3066\u3082\u5b89\u5168\u3068\u3044\u3048\u307e\u3059\u3002\r\n\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u5909\u66f4\r\n\u975e\u63a8\u5968\u306e\u5b9f\u9a13\u7684\uff08deprecated experimental\uff09\u30b3\u30eb\u30fc\u30c1\u30f3\u306e\u9664\u5916\r\nkotlin.coroutines.experimental API\u306f\u30011.3.0\u306b\u304a\u3051\u308b\u00a0kotlin.coroutines \u306e\u5c0e\u5165\u306b\u3088\u308a\u975e\u63a8\u5968\u3068\u306a\u308a\u307e\u3057\u305f \u3002 1.4-M1\u3067\u306f\u3001kotlin.coroutines.experimental\u00a0\u306f\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u304b\u3089\u524a\u9664\u3055\u308c\u3001deprecate\u30b5\u30a4\u30af\u30eb\u304c\u5b8c\u4e86\u3059\u308b\u3053\u3068\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002 JVM\u3067\u4f7f\u7528\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u3092\u8003\u616e\u3057\u3001\u4e92\u63db\u6027\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8 kotlin-coroutines-experimental-compat.jar \u306b\u306f\u3001\u3059\u3079\u3066\u306e\u5b9f\u9a13\u7684\u30b3\u30eb\u30fc\u30c1\u30f3API\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002 \u3053\u308c\u3092Maven\u306b\u516c\u958b\u3057\u3001\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u306f\u5225\u306bKotlin\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u306b\u542b\u3081\u308b\u610f\u5411\u3067\u3059\u3002 \u73fe\u6642\u70b9\u3067\u306f\u30011.4-M1\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u3068\u3068\u3082\u306b\u3001\u30d0\u30a4\u30ca\u30ea\u30ea\u30dd\u30b8\u30c8\u30ea\u306b\u516c\u958b\u3055\u308c\u3066\u3044\u307e\u3059\u3002\r\n\u975e\u63a8\u5968\u306emod\u6f14\u7b97\u5b50\u306e\u524a\u9664\r\n\u5225\u306e\u975e\u63a8\u5968\u95a2\u6570\u3068\u3057\u3066\u6570\u5024\u578b\u306b\u5bfe\u3059\u308b\u00a0mod \u6f14\u7b97\u5b50\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u9664\u7b97\u306e\u5f8c\u306b\u5270\u4f59\u3092\u8a08\u7b97\u3059\u308b\u6f14\u7b97\u5b50\u3067\u3059\u3002 Kotlin 1.1\u306b\u304a\u3044\u3066 rem() \u95a2\u6570\u306b\u7f6e\u304d\u63db\u3048\u3089\u308c\u305f\u6f14\u7b97\u5b50\u3067\u3059\u304c\u3001 \u4eca\u56de\u3001\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u304b\u3089\u5b8c\u5168\u306b\u524a\u9664\u3055\u308c\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3057\u305f\u3002\r\nfloating\u578b\u304b\u3089Byte\u578b\u304a\u3088\u3073Short\u578b\u3078\u306e\u5909\u63db\u306e\u5ec3\u6b62\r\n\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u306f\u3001\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u3092\u6574\u6570\u578b\u306b\u5909\u63db\u3059\u308b toInt()\u3001toShort()\u3001toByte() \u3068\u3044\u3046\u95a2\u6570\u304c\u3042\u308a\u307e\u3059\u3002 \u5024\u306e\u7bc4\u56f2\u304c\u72ed\u304f\u3001\u53ef\u5909\u30b5\u30a4\u30ba\u304c\u3088\u308a\u5c0f\u3055\u3044\u3053\u3068\u304b\u3089\u3001\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u3092 Short \u578b\u3068 Byte \u578b\u306b\u5909\u63db\u3059\u308b\u3053\u3068\u3067\u3001\u4e88\u671f\u3057\u306a\u3044\u7d50\u679c\u304c\u751f\u307e\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002 \u3053\u3046\u3044\u3063\u305f\u554f\u984c\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u306b\u30011.4-M1\u306b\u304a\u3044\u3066\u3001Double \u578b\u3068 Float \u578b\u3067\u306e toShort() \u95a2\u6570\u3068 toByte() \u95a2\u6570\u3092\u975e\u63a8\u5968\u3068\u3057\u307e\u3057\u305f\u3002 \u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u3092 Byte \u578b\u3084 Short \u578b\u306b\u5909\u63db\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306f\u30012\u6bb5\u968e\u5909\u63db\u306b\u3088\u308a\u3001\u307e\u305a Int \u578b\u306b\u5909\u63db\u3057\u3066\u304b\u3089\u76ee\u6a19\u306e\u578b\u306b\u5909\u63db\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002\r\n\u5171\u901a\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3API\r\n\u5171\u901a\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3API\u3092\u6539\u5b9a\u3057\u307e\u3057\u305f\u3002 3\u3064\u306e\u5168\u30bf\u30fc\u30b2\u30c3\u30c8\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\uff08JVM\u3001JS\u3001\u30cd\u30a4\u30c6\u30a3\u30d6\uff09\u3067\u4f7f\u7528\u3067\u304d\u308b\u30e1\u30f3\u30d0\u30fc\u306e\u307f\u304c\u542b\u307e\u308c\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u305f\u3081\u3001\u3059\u3079\u3066\u306e\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3067\u540c\u3058\u30b3\u30fc\u30c9\u3092\u52d5\u4f5c\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\r\nuse() \u3068\u6642\u9593\u6e2c\u5b9a\u95a2\u6570\u306e\u65b0\u3057\u3044\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\r\n\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u304a\u3051\u308b\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u306e\u4f7f\u7528\u65b9\u6cd5\u304c\u62e1\u5927\u3055\u308c\u307e\u3059\u3002 1.4-M1\u3067\u306f\u3001use() \u95a2\u6570\u3068\u3001\u6642\u9593\u6e2c\u5b9a\u95a2\u6570\u306e measureTimeMillis() \u3068 measureNanoTime() \u3067\u30011\u3064\u306e\u30b3\u30fc\u30c9\u30d6\u30ed\u30c3\u30af\u5b9f\u884c\u3092\u5ba3\u8a00\u3059\u308b\u30b3\u30f3\u30c8\u30e9\u30af\u30c8\u3092\u8ffd\u52a0\u3057\u307e\u3057\u305f\u3002\r\nKotlin\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u306eProGuard\u69cb\u6210\r\n1.4-M1\u3088\u308aKotlin\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u5bfe\u3057\u3001ProGuard\/R8\u69cb\u6210\u3092 kotlin-reflect.jar \u306b\u7d44\u307f\u8fbc\u307f\u307e\u3057\u305f\u3002 \u3053\u308c\u306b\u3088\u308a\u3001R8\u307e\u305f\u306fProGuard\u3092\u4f7f\u7528\u3059\u308b\u307b\u3068\u3093\u3069\u306eAndroid\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u3001\u307b\u304b\u306b\u69cb\u6210\u30de\u30b8\u30c3\u30af\u3092\u4f7f\u3046\u3053\u3068\u306a\u304f\u3001kotlin-reflect\u3092\u52d5\u4f5c\u3055\u305b\u3089\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002 kotlin-reflect\u5185\u90e8\u306bProGurad\u30eb\u30fc\u30eb\u3092\u30b3\u30d4\u30fc\u30fb\u30da\u30fc\u30b9\u30c8\u3059\u308b\u5fc5\u8981\u306f\u306a\u304f\u306a\u308a\u307e\u3059\u304c\u3001 \u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u9069\u7528\u3059\u308b\u3059\u3079\u3066\u306eAPI\u3092\u660e\u793a\u7684\u306b\u30ea\u30b9\u30c8\u3059\u308b\u3053\u3068\u306f\u5fc5\u8981\u3067\u3059\u3002\r\nKotlin\/JVM\r\nKotlin\u306f\u3001\u30d0\u30fc\u30b8\u30e7\u30f31.3.70\u3088\u308a\u3001\u30e9\u30f3\u30bf\u30a4\u30e0\u6642\u306b\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u578b\u306e\u6ce8\u91c8\u3092JVM\u30d0\u30a4\u30c8\u30b3\u30fc\u30c9\u306b\u751f\u6210\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\uff08\u30bf\u30fc\u30b2\u30c3\u30c8\u30d0\u30fc\u30b8\u30e7\u30f31.8\u4ee5\u964d\uff09\u3002 \u3053\u306e\u6a5f\u80fd\u306f\u4e00\u90e8\u306e\u65e2\u5b58\u306eJava\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u306f\u308b\u304b\u306b\u4f7f\u3044\u3084\u3059\u304f\u3057\u3001\u65b0\u3057\u3044\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u4f5c\u6210\u8005\u3092\u3088\u308a\u5f37\u529b\u306b\u652f\u63f4\u3059\u308b\u305f\u3081\u3001\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u304b\u3089\u9577\u3089\u304f\u8981\u671b\u304c\u3042\u304c\u3063\u3066\u3044\u307e\u3057\u305f\u3002\r\n\r\n\u4ee5\u4e0b\u306e\u4f8b\u3067\u306f\u3001String \u578b\u306e @Foo \u6ce8\u91c8\u3092\u30d0\u30a4\u30c8\u30b3\u30fc\u30c9\u306b\u51fa\u529b\u3057\u3066\u30e9\u30a4\u30d6\u30e9\u30ea\u30b3\u30fc\u30c9\u3067\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\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\r\n\u30d0\u30a4\u30c8\u30b3\u30fc\u30c9\u3067\u578b\u306e\u6ce8\u91c8\u3092\u51fa\u529b\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306f\u3001Kotlin 1.3.70\u30ea\u30ea\u30fc\u30b9\u306b\u95a2\u3059\u308b\u30d6\u30ed\u30b0\u8a18\u4e8b\u306e\u8a72\u5f53\u30bb\u30af\u30b7\u30e7\u30f3\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002\r\nKotlin\/JS\r\nKotlin\/JS\u306b\u3064\u3044\u3066\u306f\u3001Gradle DSL\u306b\u3044\u304f\u3064\u304b\u306e\u5909\u66f4\u304c\u3042\u308a\u307e\u3059\u3002\u65b0\u3057\u3044IR\u30b3\u30f3\u30d1\u30a4\u30e9\u30fb\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3092\u5c0e\u5165\u3057\u305f\u6700\u521d\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u3042\u308a\u3001\u6700\u9069\u5316\u3068\u65b0\u3057\u3044\u6a5f\u80fd\u304c\u6709\u52b9\u306b\u306a\u308a\u307e\u3059\u3002\r\nGradle DSL\u306e\u5909\u66f4\u70b9\r\nkotlin.js \u304a\u3088\u3073 multiplatform \u306eGradle\u30d7\u30e9\u30b0\u30a4\u30f3\u306b\u3001\u65b0\u305f\u306b\u91cd\u8981\u306a\u8a2d\u5b9a\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002 build.gradle.kts \u30d5\u30a1\u30a4\u30eb\u306e\u30bf\u30fc\u30b2\u30c3\u30c8\u30fb\u30d6\u30ed\u30c3\u30af\u5185\u3067produceExecutable() \u8a2d\u5b9a\u3092\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u30d3\u30eb\u30c9\u4e2d\u306b .js \u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u3092\u751f\u6210\u3059\u308b\u5834\u5408\u306f\u3001\u3053\u308c\u304c\u5fc5\u9808\u3068\u306a\u308a\u307e\u3057\u305f\u3002\r\nkotlin {\r\n    target {\r\n        useCommonJs()\r\n\r\n        produceExecutable()\r\n        \r\n        browser {}\r\n    }\r\n}\r\n\r\nKotlin\/JS\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u8a18\u8ff0\u3059\u308b\u5834\u5408\u306f\u3001produceExecutable() \u3092\u7701\u7565\u3067\u304d\u307e\u3059\u3002 \u65b0\u3057\u3044IR\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\uff08\u8a73\u7d30\u306f\u4ee5\u4e0b\u3067\u8aac\u660e\uff09\u3001\u3053\u306e\u8a2d\u5b9a\u3092\u7701\u7565\u3059\u308b\u3068\u3001\u5b9f\u884c\u53ef\u80fd\u306aJS\u30d5\u30a1\u30a4\u30eb\u306f\u751f\u6210\u3055\u308c\u307e\u305b\u3093\uff08\u305d\u306e\u305f\u3081\u3001\u30d3\u30eb\u30c9\u30d7\u30ed\u30bb\u30b9\u306e\u5b9f\u884c\u304c\u52a0\u901f\u5316\u3057\u307e\u3059\uff09\u3002 klib \u30d5\u30a1\u30a4\u30eb\u306f build\/libs \u30d5\u30a9\u30eb\u30c0\u306b\u751f\u6210\u3055\u308c\u308b\u305f\u3081\u3001\u307b\u304b\u306eKotlin\/JS\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u304b\u3089\u4f7f\u7528\u3059\u308b\u304b\u3001\u540c\u3058\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u4f9d\u5b58\u95a2\u4fc2\u3068\u3057\u3066\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002 produceExecutable() \u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u3001\u3053\u306e\u52d5\u4f5c\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u767a\u751f\u3057\u307e\u3059\u3002\r\n\r\nproduceExecutable() \u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u72ec\u81ea\u306e\u30a8\u30f3\u30c8\u30ea\u30dd\u30a4\u30f3\u30c8\u4ed8\u304d\u304bJavaScript\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u3057\u3066JavaScript\u30a8\u30b3\u30b7\u30b9\u30c6\u30e0\u304b\u3089\u5b9f\u884c\u53ef\u80fd\u306a\u30b3\u30fc\u30c9\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002 \u3053\u308c\u306b\u3088\u308a\u3001\u5b9f\u969b\u306eJavaScript\u30d5\u30a1\u30a4\u30eb\u304c\u751f\u6210\u3055\u308c\u3001\u305d\u308c\u3092\u30ce\u30fc\u30c9\u30fb\u30a4\u30f3\u30bf\u30d7\u30ea\u30bf\u3067\u5b9f\u884c\u3057\u305f\u308a\u3001HTML\u30da\u30fc\u30b8\u306b\u57cb\u3081\u8fbc\u3093\u3067\u30d6\u30e9\u30a6\u30b6\u3067\u5b9f\u884c\u3057\u305f\u308a\u3001JavaScript\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u4f9d\u5b58\u95a2\u4fc2\u3068\u3057\u3066\u4f7f\u7528\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\r\n\r\n\u65b0\u3057\u3044IR\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3092\u30bf\u30fc\u30b2\u30c3\u30c8\u3059\u308b\u5834\u5408\uff08\u8a73\u7d30\u306f\u4ee5\u4e0b\u3067\u8aac\u660e\uff09\u3001produceExecutable() \u306f\u5fc5\u305a1\u3064\u306e\u30b9\u30bf\u30f3\u30c9\u30a2\u30ed\u30f3 .js \u30d5\u30a1\u30a4\u30eb\u3092\u30bf\u30fc\u30b2\u30c3\u30c8\u3054\u3068\u306b\u751f\u6210\u3057\u307e\u3059\u3002 \u73fe\u5728\u3001\u91cd\u8907\u89e3\u9664\u3084\u3001\u8907\u6570\u306e\u751f\u6210\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u9593\u3067\u30b3\u30fc\u30c9\u3092\u5206\u5272\u3059\u308b\u3053\u3068\u306f\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002 produceExecutable() \u306e\u3053\u306e\u52d5\u4f5c\u306f\u3001\u4eca\u5f8c\u516c\u958b\u3055\u308c\u308b\u30de\u30a4\u30eb\u30b9\u30c8\u30fc\u30f3\u3067\u5909\u66f4\u3055\u308c\u308b\u4e88\u5b9a\u3067\u3059\u3002 \u3053\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u540d\u524d\u306b\u3064\u3044\u3066\u3082\u3001\u4eca\u5f8c\u5909\u66f4\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\r\n\u65b0\u3057\u3044\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\r\nKotlin 1.4-M1\u3067\u3001Kotlin\/JS\u30bf\u30fc\u30b2\u30c3\u30c8\u306e\u65b0\u3057\u3044IR\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u304c\u521d\u3081\u3066\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002 \u3053\u306e\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u306f\u3001\u6700\u9069\u5316\u306e\u5927\u5e45\u306a\u6539\u5584\u306e\u57fa\u76e4\u3067\u3042\u308a\u3001Kotlin\/JS\u304cJavaScript\u3084TypeScript\u3068\u5bfe\u8a71\u3059\u308b\u65b9\u6cd5\u3092\u4e00\u90e8\u5909\u66f4\u3059\u308b\u306a\u8981\u56e0\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002 \u4ee5\u4e0b\u306b\u30cf\u30a4\u30e9\u30a4\u30c8\u3059\u308b\u6a5f\u80fd\u306f\u3001\u3059\u3079\u3066\u65b0\u3057\u3044IR\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3092\u5bfe\u8c61\u3068\u3057\u3066\u3044\u307e\u3059\u3002 \u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u307e\u3060\u6709\u52b9\u5316\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u304c\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u8a66\u7528\u3057\u3001\u65b0\u3057\u3044\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u306b\u5408\u308f\u305b\u3066\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u6e96\u5099\u3092\u59cb\u3081\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002\u305d\u306e\u4e0a\u3067\u3001\u7686\u3055\u3093\u304b\u3089\u306e\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u3092\u304a\u5f85\u3061\u3057\u3066\u3044\u307e\u3059\u3002\u554f\u984c\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306b\u306f\u3001\u305c\u3072\u3001\u305d\u306e\u8ab2\u984c\u3092\u30ed\u30b0\u306b\u8a18\u9332\u3057\u3066\u304f\u3060\u3055\u3044\u3002\r\n\u65b0\u3057\u3044\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u306e\u4f7f\u7528\r\n\u65b0\u3057\u3044\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3092\u4f7f\u7528\u3057\u59cb\u3081\u308b\u306b\u306f\u3001gradle.properties \u30d5\u30a1\u30a4\u30eb\u306b\u6b21\u306e\u30d5\u30e9\u30b0\u3092\u8a2d\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002\r\nkotlin.js.compiler=ir\r\n\r\nIR\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3068\u30c7\u30d5\u30a9\u30eb\u30c8\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u7528\u306b\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u751f\u6210\u3059\u308b\u5834\u5408\u306f\u3001\u3053\u306e\u30d5\u30e9\u30b0\u3092 both \u306b\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u3053\u306e\u30d5\u30e9\u30b0\u306e\u5b9f\u969b\u306e\u4f5c\u7528\u306b\u3064\u3044\u3066\u306f\u3001\u3053\u306e\u30d6\u30ed\u30b0\u306e\u300c\u201cBoth-mode\u201d\u300d\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u3002 \u65b0\u3057\u3044\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3068\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u306b\u30d0\u30a4\u30ca\u30ea\u4e92\u63db\u6027\u304c\u306a\u3044\u305f\u3081\u3001\u3053\u306e\u30d5\u30e9\u30b0\u304c\u5fc5\u8981\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\r\n\u30d0\u30a4\u30ca\u30ea\u306e\u975e\u4e92\u63db\u6027\r\n\u65b0\u3057\u3044IR\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u306e\u5927\u304d\u306a\u5909\u66f4\u70b9\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3068\u306e\u30d0\u30a4\u30ca\u30ea\u4e92\u63db\u6027\u304c\u306a\u3044\u3068\u3053\u308d\u306b\u3042\u308a\u307e\u3059\u3002 Kotlin\/JS\u306e2\u3064\u306e\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3067\u305d\u306e\u3088\u3046\u306a\u4e92\u63db\u6027\u304c\u306a\u3044\u305f\u3081\u3001\u65b0\u3057\u3044IR\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3067\u4f5c\u6210\u3055\u308c\u305f\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u30c7\u30d5\u30a9\u30eb\u30c8\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3067\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002\u307e\u305f\u305d\u306e\u9006\u3082\u540c\u69d8\u3067\u3059\u3002\r\n\r\n\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306bIR\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u3001\u3059\u3079\u3066\u306eKotlin\u4f9d\u5b58\u95a2\u4fc2\u3092\u3001\u65b0\u3057\u3044\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u66f4\u65b0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 Kotlin\/JS\u3092\u30bf\u30fc\u30b2\u30c3\u30c8\u3068\u3057\u3066Kotlin 1.4-M1\u5411\u3051\u306bJetBrains\u304c\u516c\u958b\u3057\u305f\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u306f\u3001\u3059\u3067\u306b\u3001\u65b0\u3057\u3044IR\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3067\u306e\u4f7f\u7528\u306b\u5fc5\u8981\u306a\u3059\u3079\u3066\u306e\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002 \u3053\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001Gradle\u306b\u3088\u3063\u3066\u6b63\u3057\u3044\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u304c\u81ea\u52d5\u7684\u306b\u9078\u629e\u3055\u308c\u308b\u305f\u3081\u3001IR\u56fa\u6709\u306e\u7ba1\u7406\u3092\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002 kotlin-wrappers \u306a\u3069\u306e\u4e00\u90e8\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u56fa\u6709\u306e\u7279\u6027\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u65b0\u3057\u3044IR\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3067\u306f\u554f\u984c\u3068\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u306e\u3067\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002 \u3053\u306e\u8ab2\u984c\u306e\u5b58\u5728\u306f\u3059\u3067\u306b\u5831\u544a\u6e08\u307f\u3067\u3042\u308a\u3001\u4eca\u5f8c\u306e\u6a5f\u80fd\u6539\u5584\u306b\u52aa\u3081\u3066\u3044\u307e\u3059\u3002\r\n\r\n\u73fe\u5728\u306e\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3060\u3051\u3067\u306a\u304f\u3001\u65b0\u3057\u3044IR\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3068\u306e\u4e92\u63db\u6027\u306e\u63d0\u4f9b\u3092\u8003\u3048\u3066\u3044\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u4f5c\u6210\u8005\u306f\u3001\u3053\u306e\u30d6\u30ed\u30b0\u8a18\u4e8b\u306e\u300cBoth-mode\u300d\u3082\u5408\u308f\u305b\u3066\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002\r\n\r\n\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u65b0\u3057\u3044\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u30e1\u30ea\u30c3\u30c8\u3068\u5909\u66f4\u70b9\u3092\u3088\u308a\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059\u3002\r\n\u6700\u9069\u5316\u3055\u308c\u305fDCE\uff08Dead Code Elimination:\u30c7\u30c3\u30c9\u30b3\u30fc\u30c9\u306e\u524a\u9664\uff09\r\n\u65b0\u3057\u3044IR\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u306b\u6bd4\u3079\u3066\u3088\u308a\u7a4d\u6975\u7684\u306a\u6700\u9069\u5316\u3092\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002 \u751f\u6210\u3055\u308c\u305f\u30b3\u30fc\u30c9\u306fStatic Analyzer\u3068\u3088\u308a\u3046\u307e\u304f\u9023\u643a\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u305d\u308c\u3092Google\u306eClosure Compiler\u3092\u901a\u3058\u3066\u65b0\u3057\u3044IR\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u304b\u3089\u5b9f\u884c\u3057\u305f\u308a\u3001Advanced\u30e2\u30fc\u30c9\u306e\u6700\u9069\u5316\u6a5f\u80fd\u3092\u4f7f\u7528\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\uff08\u305f\u3060\u3057\u3001\u6700\u9069\u5316\u6a5f\u80fd\u306e\u4f7f\u7528\u306f\u3001Kotlin\/JS Gradle\u30d7\u30e9\u30b0\u30a4\u30f3\u3067\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u305f\u6a5f\u80fd\u3067\u306f\u3042\u308a\u307e\u305b\u3093\uff09\u3002\r\n\r\n\u4e00\u756a\u308f\u304b\u308a\u3084\u3059\u3044\u5909\u66f4\u70b9\u306f\u3001\u751f\u6210\u3055\u308c\u305f\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u306e\u30b3\u30fc\u30c9\u30b5\u30a4\u30ba\u306b\u3042\u308a\u307e\u3059\u3002 \u30c7\u30c3\u30c9\u30b3\u30fc\u30c9\u3092\u524a\u9664\u3059\u308b\u65b9\u6cd5\u304c\u6539\u5584\u3055\u308c\u3001\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u3092\u5927\u5e45\u306b\u7e2e\u5c0f\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u3068\u3053\u308d\u3067\u3059\u3002 \u305f\u3068\u3048\u3070\u3001\u3053\u306e\u6539\u5584\u306b\u3088\u308a\u3001\u201cHello, World!\u201d Kotlin\/JS\u30d7\u30ed\u30b0\u30e9\u30e0\u306f1.7 KiB\u672a\u6e80\u306b\u7e2e\u5c0f\u3055\u308c\u307e\u3059\u3002 kotlinx.coroutines \u3092\u4f7f\u7528\u3057\u305f\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u3088\u3046\u306b\u3088\u308a\u8907\u96d1\u306a\uff08\u30c7\u30e2\uff09\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u5834\u5408\u306f\u3001\u6b21\u306b\u793a\u3055\u308c\u308b\u3088\u3046\u306b\u6570\u5b57\u3082\u5927\u5e45\u306b\u5909\u5316\u3057\u307e\u3059\u3002\r\n\r\n\r\n\r\n\r\n\u30c7\u30d5\u30a9\u30eb\u30c8\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\r\nIR\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\r\n\r\n\r\n\r\n\r\n\u30b3\u30f3\u30d1\u30a4\u30eb\u5f8c\r\n3.9 MiB\r\n1.1 MiB\r\n\r\n\r\nJS DCE\u5f8c\r\n713 KiB\r\n430 KiB\r\n\r\n\r\n\u30d0\u30f3\u30c9\u30eb\u5f8c\r\n329 KiB\r\n184 KiB\r\n\r\n\r\nZIP\u5f8c\r\n74 KiB\r\n40 KiB\r\n\r\n\r\n\r\n\u3044\u307e\u3044\u3061\u7d0d\u5f97\u304c\u3044\u304b\u306a\u3044\u65b9\u306f\u3001\u81ea\u5206\u3067\u8a66\u3057\u3066\u307f\u308b\u3068\u3088\u3044\u3067\u3057\u3087\u3046\u3002 Kotlin 1.4-M1\u3067\u306f\u3001\u4e21\u65b9\u306e\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3067DCE\u3068\u30d0\u30f3\u30c9\u30eb\u5316\u304c\u6709\u52b9\u5316\u3055\u308c\u3066\u3044\u307e\u3059\uff01\r\nJavaScript\u3078\u306e\u5ba3\u8a00\u306e\u30a8\u30af\u30b9\u30dd\u30fc\u30c8\r\nIR\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3092\u4f7f\u3046\u3068\u3001public\u306b\u30de\u30fc\u30af\u3055\u308c\u305f\u5ba3\u8a00\u306f\u81ea\u52d5\u7684\u306b\u30a8\u30af\u30b9\u30dd\u30fc\u30c8\u3055\u308c\u306a\u304f\u306a\u308a\u307e\u3057\u305f\u3002 \u3053\u308c\u306f\u3001IR\u30b3\u30f3\u30d1\u30a4\u30e9\u306e closed-world \u30e2\u30c7\u30eb\u304c\u3001\u30a8\u30af\u30b9\u30dd\u30fc\u30c8\u3055\u308c\u305f\u5ba3\u8a00\u304c\u5177\u4f53\u7684\u306b\u6ce8\u91c8\u4ed8\u3051\u3055\u308c\u3066\u3044\u308b\u3068\u307f\u306a\u3059\u305f\u3081\u3067\u3059\u3002\u5177\u4f53\u7684\u306a\u6ce8\u91c8\u306f\u3001\u4e0a\u306b\u793a\u3057\u305f\u3088\u3046\u306a\u6700\u9069\u5316\u3092\u884c\u3046\u305f\u3081\u306e\u4e00\u8981\u56e0\u3067\u3059\u3002\r\n\r\n\u30c8\u30c3\u30d7\u30ec\u30d9\u30eb\u306e\u5ba3\u8a00\u3092JavaScript\u3084TypeScript\u3067\u5229\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u306b\u306f\u3001@JsExport \u6ce8\u91c8\u3092\u4f7f\u7528\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002 \u6b21\u306e\u4f8b\u3067\u306f\u3001KotlinGreeter (\u3068\u305d\u306e\u30e1\u30bd\u30c3\u30c9\uff09\u3068 farewell() \u3092JavaScript\u3067\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u3068\u540c\u6642\u306b\u3001 secretGreeting() \u3092Kotlin\u9650\u5b9a\u306b\u3057\u3066\u3044\u307e\u3059\u3002\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!\" \/\/ Kotlin\u9650\u5b9a\u30a2\u30af\u30bb\u30b9\uff01\r\n\r\n\u30d7\u30ec\u30d3\u30e5\u30fc: TypeScript\u306e\u5b9a\u7fa9\r\n\u65b0\u3057\u3044Kotlin\/JS IR\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u3082\u30461\u3064\u306e\u6a5f\u80fd\u3068\u3057\u3066\u516c\u958b\u3059\u308b\u306e\u3092\u697d\u3057\u307f\u306b\u3057\u3066\u3044\u308b\u306e\u306f\u3001Kotlin\u30b3\u30fc\u30c9\u304b\u3089TypeScript\u5b9a\u7fa9\u3092\u751f\u6210\u3059\u308b\u6a5f\u80fd\u3067\u3059\u3002 \u3053\u308c\u3089\u306e\u5b9a\u7fa9\u306f\u3001\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9\u30a2\u30d7\u30ea\u3092\u5236\u4f5c\u3059\u308b\u969b\u306bJavaScript\u30c4\u30fc\u30eb\u3068IDE\u3067\u4f7f\u7528\u3067\u304d\u308b\u3082\u306e\u3067\u3001\u81ea\u52d5\u88dc\u5b8c\u6a5f\u80fd\u306e\u63d0\u4f9b\u3001Static Analyzer\u306e\u30b5\u30dd\u30fc\u30c8\u3001JS\u304a\u3088\u3073TS\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3078\u306eKotlin\u30b3\u30fc\u30c9\u7d44\u307f\u8fbc\u307f\u306e\u7c21\u5358\u5316\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002\r\n\r\nproduceExecutable() \u3092\u4f7f\u7528\u3059\u308b\u3088\u3046\u306b\u69cb\u6210\u3055\u308c\u305f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u304a\u3044\u3066 @JsExport \u3067\u30de\u30fc\u30af\u3055\u308c\u305f\u30c8\u30c3\u30d7\u30ec\u30d9\u30eb\u306e\u5ba3\u8a00\u306b\u3064\u3044\u3066\u306f\uff08\u4e0a\u8a18\u53c2\u7167\uff09\u3001TypeScript\u5b9a\u7fa9\u3092\u542b\u3080 .d.ts \u30d5\u30a1\u30a4\u30eb\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002 \u4e0a\u306e\u30b9\u30cb\u30da\u30c3\u30c8\u3067\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\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\r\nKotlin 1.4-M1\u3067\u306f\u3001\u3053\u308c\u308c\u3089\u306e\u5ba3\u8a00\u306f\u3001\u5bfe\u5fdc\u3059\u308bwebpack\u3055\u308c\u3066\u3044\u306a\u3044JavaScript\u30b3\u30fc\u30c9\u3068\u3068\u3082\u306b\u3001build\/js\/packages\/<package_name>\/kotlin \u306b\u3042\u308a\u307e\u3059\u3002 \u305f\u3060\u3057\u3001\u3053\u308c\u306f\u30d7\u30ec\u30d3\u30e5\u30fc\u6a5f\u80fd\u3067\u3042\u308b\u305f\u3081\u3001\u4eca\u306e\u3068\u3053\u308d\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f distributions \u30d5\u30a9\u30eb\u30c0\u306b\u8ffd\u52a0\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002 \u3053\u306e\u52d5\u4f5c\u306f\u3001\u4eca\u5f8c\u5909\u66f4\u3055\u308c\u308b\u4e88\u5b9a\u3067\u3059\u3002\r\nBoth-mode\r\n\u65b0\u3057\u3044IR\u30b3\u30f3\u30d1\u30a4\u30e9\u30fb\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u306b\u79fb\u884c\u3059\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u7ba1\u7406\u8005\u306e\u4f5c\u696d\u3092\u7c21\u7565\u5316\u3067\u304d\u308b\u3088\u3046\u306b\u3001gradle.properties \u5185\u306b kotlin.js.compiler \u30d5\u30e9\u30b0\u306e\u8a2d\u5b9a\u304c\u8ffd\u52a0\u3055\u308c\u3066\u3044\u307e\u3059\u3002\r\nkotlin.js.compiler=both\r\n\r\nboth \u30e2\u30fc\u30c9\u304c\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u30bd\u30fc\u30b9\u304b\u3089\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u30d3\u30eb\u30c9\u3059\u308b\u969b\u306bIR\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3068\u30c7\u30d5\u30a9\u30eb\u30c8\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u306e\u4e21\u65b9\u304c\u4f7f\u7528\u3055\u308c\u307e\u3059\uff08\u3053\u308c\u304c\u540d\u524d\u306e\u7531\u6765\u3067\u3059\uff09\u3002 \u3064\u307e\u308a\u3001\u751f\u6210\u3055\u308c\u308b\u306e\u306f\u3001Kotlin IR\u3092\u4f7f\u3046 klib \u30d5\u30a1\u30a4\u30eb\u3068\u30c7\u30d5\u30a9\u30eb\u30c8\u30b3\u30f3\u30d1\u30a4\u30e9\u7528\u306e js \u30d5\u30a1\u30a4\u30eb\u306e2\u3064\u3067\u3059\u3002 \u540c\u4e00\u306eMaven\u30b3\u30fc\u30c7\u30a3\u30cd\u30fc\u30c8\u3067\u516c\u958b\u3055\u308c\u308b\u3068\u3001Gradle\u306f\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u3092\u81ea\u52d5\u7684\u306b\u9078\u629e\u3057\u3001\u4ee5\u524d\u306e\u30b3\u30f3\u30d1\u30a4\u30e9\u3067\u3042\u308c\u3070 js\u3001\u65b0\u3057\u3044\u30b3\u30f3\u30d1\u30a4\u30e9\u3067\u3042\u308c\u3070 klib \u3092\u9078\u629e\u3059\u308b\u305f\u3081\u3001 Kotlin 1.4-M1\u306b\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u6e08\u307f\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3068\u3001\u3044\u305a\u308c\u304b\u306e\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3057\u3001\u65b0\u3057\u3044IR\u30b3\u30f3\u30d1\u30a4\u30e9\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3092\u4f7f\u3063\u3066\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3066\u516c\u958b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u304c1.4-M1\u306b\u66f4\u65b0\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3042\u308c\u3070\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u306e\u958b\u767a\u4f53\u9a13\u3092\u4e2d\u65ad\u3057\u306a\u304f\u3066\u3088\u3044\u306e\u3067\u5f79\u306b\u7acb\u3061\u307e\u3059\u3002\r\n\r\n\u4f9d\u5b58\u95a2\u4fc2\u304a\u3088\u3073\u73fe\u5728\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u304c both \u30e2\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001IDE\u304c\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u53c2\u7167\u3092\u9069\u5207\u306b\u89e3\u6c7a\u3067\u304d\u306a\u304f\u306a\u308b\u8ab2\u984c\u304c\u73fe\u5728\u3082\u6b8b\u3063\u3066\u3044\u307e\u3059\u3002 \u3053\u306e\u554f\u984c\u306f\u5831\u544a\u6e08\u307f\u3067\u3001\u8fd1\u65e5\u4fee\u6b63\u3055\u308c\u308b\u4e88\u5b9a\u3067\u3059\u3002\r\nKotlin\/Native\r\nObjective-C\u306e\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u3092\u30c7\u30d5\u30a9\u30eb\u30c8\u30b5\u30dd\u30fc\u30c8\r\n\u4ee5\u524d\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306eKotlin\u3067\u3001Objective-C\u306e\u76f8\u4e92\u904b\u7528\u6027\u306b\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u306e\u5b9f\u9a13\u7684\u30b5\u30dd\u30fc\u30c8\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002 Kotlin\u30b3\u30fc\u30c9\u304b\u3089\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u3092\u4f7f\u3063\u3066\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u30d8\u30c3\u30c0\u30fc\u3092\u751f\u6210\u3059\u308b\u306b\u306f\u3001-Xobjc-generics \u30b3\u30f3\u30d1\u30a4\u30e9\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3057\u305f\u3002 1.4-M1\u3067\u306f\u3001\u3053\u308c\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u52d5\u4f5c\u3067\u3059\u3002 \u4e00\u90e8\u306e\u30b1\u30fc\u30b9\u3067\u306f\u3001\u3053\u308c\u306b\u3088\u3063\u3066Kotlin\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3092\u547c\u3073\u51fa\u3059\u65e2\u5b58\u306eObjective-C\u307e\u305f\u306fSwift\u30b3\u30fc\u30c9\u304c\u58ca\u308c\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u306e\u3067\u3001 \u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u3092\u4f7f\u7528\u305b\u305a\u306b\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u30fb\u30d8\u30c3\u30c0\u30fc\u3092\u8a18\u8ff0\u3059\u308b\u5834\u5408\u306f\u3001-Xno-objc-generics \u30b3\u30f3\u30d1\u30a4\u30e9\u30fb\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u8ffd\u52a0\u3057\u3066\u304f\u3060\u3055\u3044\u3002\r\nbinaries.framework {\r\n     freeCompilerArgs += \"-Xno-objc-generics\"\r\n}\r\n\r\n\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u8a18\u8f09\u3055\u308c\u3066\u3044\u308b\u3059\u3079\u3066\u306e\u6307\u5b9a\u5b50\u3068\u5236\u9650\u306f\u3001\u73fe\u5728\u3082\u9069\u7528\u3055\u308c\u307e\u3059\u3002\r\nObjective-C\/Swift\u76f8\u4e92\u904b\u7528\u6027\u306b\u304a\u3051\u308b\u4f8b\u5916\u51e6\u7406\u306e\u5909\u66f4\r\n1.4\u3067\u306f\u3001\u4f8b\u5916\u304c\u89e3\u91c8\u3055\u308c\u308b\u65b9\u6cd5\u306b\u95a2\u3057\u3001Kotlin\u304b\u3089\u751f\u6210\u3055\u308c\u308bSwift API\u304c\u308f\u305a\u304b\u306b\u5909\u66f4\u3055\u308c\u308b\u4e88\u5b9a\u3067\u3059\u3002 Kotlin\u3068Swift\u3067\u306f\u3001\u30a8\u30e9\u30fc\u306e\u51e6\u7406\u306e\u4ed5\u65b9\u304c\u6839\u672c\u7684\u306b\u7570\u306a\u308a\u307e\u3059\u3002 \u3059\u3079\u3066\u306eKotlin\u4f8b\u5916\u306f\u30c1\u30a7\u30c3\u30af\u5bfe\u8c61\u5916\u3067\u3042\u308a\u3001Swift\u306f\u30a8\u30e9\u30fc\u306e\u307f\u3092\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u3002 \u305d\u306e\u305f\u3081\u3001\u671f\u5f85\u3055\u308c\u308b\u4f8b\u5916\u3092Swift\u30b3\u30fc\u30c9\u306b\u77e5\u3089\u305b\u308b\u306b\u306f\u3001Kotlin\u95a2\u6570\u3092 @Throws \u6ce8\u91c8\u3067\u30de\u30fc\u30af\u3057\u3001\u6f5c\u5728\u7684\u306a\u4f8b\u5916\u30af\u30e9\u30b9\u306e\u30ea\u30b9\u30c8\u3092\u6307\u5b9a\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\r\nSwift\u307e\u305f\u306fObjective-C\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306b\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u969b\u3001@Throws \u6ce8\u91c8\u3092\u6301\u3064\u95a2\u6570\u3084\u305d\u308c\u3092\u7d99\u627f\u3059\u308b\u95a2\u6570\u306f\u3001Objective-C\u3067\u306f NSError* \u304c\u751f\u6210\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u3001Swift\u3067\u306f throws \u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u8868\u3055\u308c\u307e\u3059\u3002\r\n\u4ee5\u524d\u306f\u3001RuntimeException \u3068 Error \u3092\u9664\u304f\u3059\u3079\u3066\u306e\u4f8b\u5916\u306f\u3001NSError \u3068\u3057\u3066\u4f1d\u642c\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002 1.4-M1\u3067\u306f\u3053\u306e\u52d5\u4f5c\u304c\u5909\u66f4\u3055\u308c\u3001 NSError \u306f\u3001\u4f8b\u5916\u304c @Throws \u6ce8\u91c8\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u6307\u5b9a\u3055\u308c\u305f\u30af\u30e9\u30b9\uff08\u307e\u305f\u306f\u305d\u306e\u30b5\u30d6\u30af\u30e9\u30b9\uff09\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u3042\u308b\u5834\u5408\u306b\u306e\u307f\u6295\u3052\u3089\u308c\u307e\u3059\u3002 Swift\/Objective-C\u306b\u5c4a\u304f\u305d\u306e\u4ed6\u306eKotlin\u4f8b\u5916\u306f\u3001\u672a\u51e6\u7406\u3068\u306a\u308a\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u7d42\u4e86\u3059\u308b\u539f\u56e0\u3068\u306a\u308a\u307e\u3059\u3002\r\n\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6539\u5584\r\nKotlin\/Native\u30b3\u30f3\u30d1\u30a4\u30eb\u3068\u5b9f\u884c\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5168\u4f53\u7684\u306b\u6539\u5584\u3067\u304d\u308b\u3088\u3046\u306b\u3001\u5f15\u304d\u7d9a\u304d\u52aa\u3081\u3066\u3044\u307e\u3059\u3002 1.4-M1\u3067\u306f\u3001\u4e00\u90e8\u306e\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u306b\u5bfe\u3057\u6700\u59272\u500d\u306e\u901f\u5ea6\u3067\u52d5\u4f5c\u3059\u308b\u65b0\u3057\u3044\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30a2\u30ed\u30b1\u30fc\u30bf\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002 \u73fe\u5728\u306e\u3068\u3053\u308d\u3001\u65b0\u3057\u3044\u30a2\u30ed\u30b1\u30fc\u30bf\u306f\u5b9f\u9a13\u7684\u3067\u3042\u308a\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002-Xallocator=mimalloc \u30b3\u30f3\u30d1\u30a4\u30e9\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u305d\u306e\u30a2\u30ed\u30b1\u30fc\u30bf\u306b\u5207\u308a\u66ff\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\r\n\u4e92\u63db\u6027\r\n\u4e00\u90e8\u306e\u30b3\u30fc\u30ca\u30fc\u30b1\u30fc\u30b9\u306b\u304a\u3044\u3066\u3001Kotlin 1.4\u306b\u306f1.3\u3068\u306e\u4e0b\u4f4d\u4e92\u63db\u6027\u306f\u3042\u308a\u307e\u305b\u3093\u3002 Kotlin\u8a00\u8a9e\u59d4\u54e1\u4f1a\u306f\u305d\u3046\u3044\u3063\u305f\u30b1\u30fc\u30b9\u3092\u6ce8\u610f\u6df1\u304f\u30ec\u30d3\u30e5\u30fc\u3057\u3001\u300c\u4e92\u63db\u6027\u30ac\u30a4\u30c9\u300d\uff08\u3053\u308c\u306b\u4f3c\u305f\u69d8\u5f0f\uff09\u3068\u3057\u3066\u63b2\u8f09\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002 \u73fe\u6642\u70b9\u3067\u306f\u3001YouTrack\u3067\u3053\u306e\u30ea\u30b9\u30c8\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002\r\n\r\n\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306e\u89e3\u6c7a\u30eb\u30fc\u30eb\u304c\u308f\u305a\u304b\u306b\u5909\u66f4\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 \u540c\u3058\u540d\u524d\u3067\u7570\u306a\u308b\u30b7\u30b0\u30cd\u30c1\u30e3\u30fc\u3092\u6301\u3064\u95a2\u6570\u304c\u8907\u6570\u3042\u308b\u5834\u5408\u3001Kotlin 1.4\u306b\u8aad\u307f\u8fbc\u307e\u308c\u308b\u95a2\u6570\u3068Kotlin 1.3\u3067\u9078\u629e\u3055\u308c\u305f\u95a2\u6570\u304c\u7570\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u3053\u306e\u6319\u52d5\u306f\u3001\u4e00\u90e8\u306e\u30b3\u30fc\u30ca\u30fc\u30b1\u30fc\u30b9\u3067\u306e\u307f\u767a\u751f\u3059\u308b\u3082\u306e\u3067\u3001\u975e\u5e38\u306b\u307e\u308c\u306a\u30b1\u30fc\u30b9\u3067\u3042\u308b\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u307e\u305f\u3001\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3057\u305f\u95a2\u6570\u306f\u540c\u69d8\u306e\u6319\u52d5\u3092\u898b\u305b\u3001\u6700\u7d42\u7684\u306b\u4e92\u3044\u3092\u547c\u3073\u51fa\u3059\u305f\u3081\u3001\u3053\u308c\u3089\u306e\u5909\u66f4\u3057\u305f\u3068\u3053\u308d\u3067\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u52d5\u4f5c\u306b\u306f\u5f71\u97ff\u3057\u306a\u3044\u3068\u3082\u8003\u3048\u3066\u3044\u307e\u3059\u3002 \u69d8\u3005\u306a\u30ec\u30d9\u30eb\u3067\u30b8\u30a7\u30cd\u30c6\u30a3\u30af\u30b9\u3084\u591a\u6570\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3092\u4f7f\u3063\u305f\u624b\u306e\u8fbc\u3093\u3060\u30b3\u30fc\u30c9\u3092\u8a18\u8ff0\u3059\u308b\u5834\u5408\u306f\u3001\u305d\u306e\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002 \u3053\u306e\u3088\u3046\u306a\u3059\u3079\u3066\u306e\u30b1\u30fc\u30b9\u306f\u3001\u4e0a\u3067\u8a00\u53ca\u3057\u305f\u4e92\u63db\u6027\u30ac\u30a4\u30c9\u306b\u8a18\u8f09\u3055\u308c\u308b\u4e88\u5b9a\u3067\u3059\u3002\r\n\u30d7\u30ec\u30ea\u30ea\u30fc\u30b9\u306b\u95a2\u3059\u308b\u6ce8\u610f\u4e8b\u9805\r\n\u4e0b\u4f4d\u4e92\u63db\u6027\u4fdd\u8a3c\u306f\u3001\u30d7\u30ec\u30ea\u30ea\u30fc\u30b9\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u306f\u9069\u7528\u3055\u308c\u307e\u305b\u3093\u3002 \u6a5f\u80fd\u3084API\u306f\u3001\u5f8c\u7d9a\u306e\u30ea\u30ea\u30fc\u30b9\u3067\u5909\u66f4\u3059\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002 \u6700\u7d42RC\u306b\u9054\u3059\u308b\u3068\u3001\u30d7\u30ec\u30ea\u30ea\u30fc\u30b9\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u751f\u6210\u3057\u305f\u3059\u3079\u3066\u306e\u30d0\u30a4\u30ca\u30ea\u306f\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u306b\u3088\u3063\u3066\u4f7f\u7528\u7981\u6b62\u3068\u306a\u308a\u307e\u3059\u3002\u305d\u306e\u5834\u5408\u30011.4-Mx\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u305f\u3059\u3079\u3066\u306e\u3082\u306e\u3092\u518d\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\r\n\u8a66\u7528\u65b9\u6cd5\r\n\u3044\u3064\u3082\u306e\u3088\u3046\u306b\u3001play.kotl.in\u3067Kotlin\u3092\u30aa\u30f3\u30e9\u30a4\u30f3\u3067\u8a66\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\r\n\r\nIntelliJ IDEA\u3068Android Studio\u5185\u3067\u3001Kotlin\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u30d0\u30fc\u30b8\u30e7\u30f31.4-M1\u306b\u66f4\u65b0\u3067\u304d\u307e\u3059\u3002 \u305d\u306e\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306f\u3053\u308c\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002\r\n\r\n\u30d7\u30ec\u30ea\u30ea\u30fc\u30b9\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u524d\u306b\u4f5c\u6210\u3055\u308c\u305f\u65e2\u5b58\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001Gradle\u307e\u305f\u306fMaven\u3067\u30d7\u30ec\u30d3\u30e5\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u7528\u306b\u30d3\u30eb\u30c9\u3092\u69cb\u6210\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\r\n\r\n\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30b3\u30f3\u30d1\u30a4\u30e9\u306f\u3001GitHub\u30ea\u30ea\u30fc\u30b9\u30da\u30fc\u30b8\u304b\u3089\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3067\u304d\u307e\u3059\u3002\r\n\r\n\u3053\u306e\u30ea\u30ea\u30fc\u30b9\u3068\u3068\u3082\u306b\u516c\u958b\u3055\u308c\u305f\u6b21\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\r\n\r\n\tkotlinx.atomicfu 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\u3059\u3079\u3066\u306e\u91cd\u8981\u306a\u8ab2\u984c\u306b\u3064\u3044\u3066\u306f\u3001\u6b21\u306eKotlin\u30ea\u30ea\u30fc\u30b9\u307e\u3067\u8ab2\u984c\u89e3\u6c7a\u3092\u5ef6\u671f\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u6700\u7d42\u30ea\u30ea\u30fc\u30b9\u524d\u306b\u4fee\u6b63\u3057\u305f\u3044\u3068\u601d\u3063\u3066\u3044\u307e\u3059\u3002\r\n\r\n\u3054\u8cea\u554f\u304c\u3042\u308b\u5834\u5408\u3084\u30c7\u30a3\u30b9\u30ab\u30c3\u30b7\u30e7\u30f3\u3078\u306e\u53c2\u52a0\u3092\u3054\u5e0c\u671b\u306e\u5834\u5408\u306f\u3001Kotlin Slack\u306e#eap\u30c1\u30e3\u30f3\u30cd\u30eb\u3092\u304a\u6c17\u8efd\u306b\u8997\u3044\u3066\u304f\u3060\u3055\u3044\uff08\u62db\u5f85\u72b6\u30ea\u30af\u30a8\u30b9\u30c8\u306f\u3053\u3061\u3089\u304b\u3089\uff09\u3002 \u3053\u306e\u30c1\u30e3\u30f3\u30cd\u30eb\u3067\u306f\u3001\u65b0\u3057\u3044\u30d7\u30ec\u30d3\u30e5\u30fc\u30d3\u30eb\u30c9\u306b\u95a2\u3059\u308b\u901a\u77e5\u3092\u53d7\u3051\u53d6\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\r\n\r\nLet\u2019s Kotlin!\r\n\u3054\u5354\u529b\u3044\u305f\u3060\u3044\u305f\u5916\u90e8\u8ca2\u732e\u8005\r\nkotlin-reflect \u306b ProGuard\u69cb\u6210\u3092\u7d44\u307f\u8fbc\u3093\u3067\u3044\u305f\u3060\u3044\u305f\u00a0Zac Sweers\u00a0\u306b\u3001\u7279\u5225\u306b\u611f\u8b1d\u306e\u610f\u3092\u8868\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002\r\n\r\n\u307e\u305f\u3001\u3053\u306e\u30ea\u30ea\u30fc\u30b9\u306b\u542b\u3081\u3089\u308c\u305fPull\u30ea\u30af\u30a8\u30b9\u30c8\u306f\u3001\u6b21\u306e\u5916\u90e8\u8ca2\u732e\u8005\u304b\u3089\u3044\u305f\u3060\u3044\u305f\u3082\u306e\u3067\u3059\u3002\u3054\u5354\u529b\u3044\u305f\u3060\u304d\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3057\u305f\u3002\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]\u00a0Original post\u00a0in English is written by\u00a0Sebastian Aigner","protected":false},"excerpt":{"rendered":"\u3053\u3061\u3089\u306f2020\u5e743\u670823\u65e5\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305fKotlin 1.4-M1 Released\u306e\u65e5\u672c\u8a9e\u8a33\u3067\u3059\u3002\u65b0\u3057\u3044\u30e1\u30b8\u30e3\u30fc\u30ea\u30ea\u30fc\u30b9\u306e\u6700\u521d\u306e\u30d7\u30ec\u30d3\u30e5\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u300cKotlin 1.4-M1\u300d\u304c\u5229\u7528\u53ef\u80fd\u3067\u3059\u3002Kotlin 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