{"id":44744,"date":"2023-05-05T03:18:27","date_gmt":"2023-10-07T05:06:30","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/44744-2\/"},"modified":"2024-04-30T02:40:47","modified_gmt":"2024-04-29T18:40:47","slug":"44744-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/44744-2\/","title":{"rendered":""},"content":{"rendered":"<h2>\u306f\u3058\u3081\u306b<\/h2>\n<p>\u30e1\u30eb\u30da\u30a4 \u30a8\u30ad\u30b9\u30d1\u30fc\u30c8\u30c1\u30fc\u30e0\u306e@tenntenn\u3067\u3059\u3002<br \/>\n\u3053\u306e\u8a18\u4e8b\u306f\u6280\u8853\u66f8\u51784\u3067\u9812\u5e03\u3057\u305f&#8221;\u3053\u3046\u3057\u3066\u50d5\u3089\u306f\u3001\u66f8\u7c4d\u3092\u58f2\u308b\u30a2\u30d7\u30ea\u3092\u4f5c\u3063\u305f 2.0.1&#8243;\u306e\u4e00\u90e8\u3092\u5c11\u3057\u6539\u5b9a\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>Google App Engine for Go \uff08GAE\/Go\uff09\u3067\u958b\u767a\u3059\u308b\u4e0a\u3067\u4ed8\u304d\u5408\u3063\u3066\u3044\u304b\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u554f\u984c\u3068\u3057\u3066\u3001GAE\u306eSDK\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3084\u305d\u3053\u3067\u4f7f\u7528\u3055\u308c\u308bGo\u81ea\u4f53\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002<br \/>\nGAE\/Go\u306f\u30af\u30e9\u30a6\u30c9\u30b5\u30fc\u30d3\u30b9\u3067\u3042\u308b\u305f\u3081\u3001SDK\u3084\u8a00\u8a9e\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u306f\u5fc5\u305a\u8ffd\u5f93\u3057\u3066\u884c\u304f\u5fc5\u8981\u306e\u3042\u308b\u554f\u984c\u3067\u3059\u3002<br \/>\n\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u3057\u306a\u304f\u3066\u3082\u3001\u4e00\u5b9a\u671f\u9593\u306f\u305d\u306e\u307e\u307e\u4f7f\u3048\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3057\u3087\u3046\u3002<br \/>\n\u3057\u304b\u3057\u3001\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u975e\u63a8\u5968\u306b\u306a\u308a\u3001\u305d\u306e\u5f8c\u4f7f\u3048\u306a\u304f\u306a\u308b\u53ef\u80fd\u6027\u3082\u3042\u308a\u5f97\u307e\u3059\u3002<br \/>\n\u305d\u306e\u305f\u3081\u3001\u7279\u306b\u5927\u304d\u306a\u554f\u984c\u304c\u306a\u3044\u5834\u5408\u306f\u7a4d\u6975\u7684\u306b\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u3092\u3057\u3066\u3044\u304f\u3068\u3088\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>Go\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u4e0a\u3052\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u6b21\u306e\u3088\u3046\u306a\u6069\u6075\u3092\u53d7\u3051\u308b\u3053\u3068\u304c\u671f\u5f85\u3067\u304d\u307e\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4f7f\u3048\u308b\u6a5f\u80fd\u3084\u30d1\u30c3\u30b1\u30fc\u30b8\u304c\u5897\u3048\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30e9\u30f3\u30bf\u30a4\u30e0\u306e\u6539\u5584\u306b\u3088\u308a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u4e0a\u304c\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30c4\u30fc\u30eb\u7fa4\u306e\u6539\u5584\u306b\u3088\u308a\u958b\u767a\u52b9\u7387\u304c\u4e0a\u304c\u308b<\/ul>\n<p>\u52a0\u3048\u3066\u3001Go\u306f\u30d0\u30fc\u30b8\u30e7\u30f31\u306e\u9593\u306f\u8a00\u8a9e\u306b\u3088\u308b\u5f8c\u65b9\u4e92\u63db\u6027\u304c\u62c5\u4fdd\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u8a00\u8a9e\u81ea\u4f53\u306e\u5f8c\u65b9\u4e92\u63db\u6027\u306f\u5fc3\u914d\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u4e00\u65b9\u3067\u3001\u8a00\u8a9e\u4ee5\u5916\u306e\u90e8\u5206\u3067\u6b21\u306e\u3088\u3046\u306a\u554f\u984c\u304c\u751f\u3058\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4f7f\u7528\u3057\u3066\u3044\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u4e92\u63db\u6027<\/ul>\n<\/li>\n<\/ul>\n<p>golang.org\/x\u4ee5\u4e0b\u3067\u7ba1\u7406\u3055\u308c\u3066\u3044\u308b\u6e96\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u304c\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u306b\u6607\u683c\u3057\u305f\u5834\u5408\u306e\u6271\u3044<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u3053\u306e\u3088\u3046\u306aGAE\/Go\u3092\u7528\u3044\u305f\u958b\u767a\u306e\u4e2d\u306b\u304a\u3051\u308b\u3001Go\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u306b\u307e\u3064\u308f\u308b\u8a71\u3092\u307e\u3068\u3081\u3066\u307f\u3088\u3046\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<h2>Google App Engine\u306eGo\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u6016\u3044\u8a71<\/h2>\n<h3>Google App Engine\u306eGo\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u6307\u5b9a<\/h3>\n<p>Go\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306f\u73fe\u5728\u534a\u5e74\u306b\u4e00\u5ea6\u306e\u30b5\u30a4\u30af\u30eb\u3067\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br \/>\nGoogle App Engine\u3082Go1.6\u307e\u3067\u306f\u305d\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u30b5\u30a4\u30af\u30eb\u306b\u591a\u5c11\u304a\u304f\u308c\u306a\u304c\u3089\u3082\u8ffd\u3044\u3064\u3044\u3066\u304d\u3066\u3044\u307e\u3057\u305f\u3002<br \/>\n\u3057\u304b\u3057\u3001Go1.7\u3067\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u306b\u5c0e\u5165\u3055\u308c\u305f\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u4e92\u63db\u6027\u306e\u554f\u984c\u306b\u3088\u308a\u3001Go1.7\u4ee5\u964d\u306f\u306a\u304b\u306a\u304bGoogle App Engine\u306b\u306fGo\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u304c\u3084\u3063\u3066\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n<p>Go1.8\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u3001Google Cloud Platform\u306e\u30e6\u30fc\u30b6\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u3067\u306fGoogle App Engine\u306eGo1.8\u306e\u8ffd\u5f93\u304c\u671f\u5f85\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u305d\u3057\u3066\u3064\u3044\u306b\u3001Go1.8\u306b\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3055\u308c\u308b\u3053\u3068\u304c\u6c7a\u5b9a\u3055\u308c\u3001\u7121\u4e8b\u30ea\u30ea\u30fc\u30b9\u306b\u81f3\u308a\u307e\u3057\u305f\u3002<\/p>\n<p>Go1.8\u5bfe\u5fdc\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305f\u969b\u306bGoogle App Engine\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8a2d\u5b9a\u3092\u884c\u3046app.yaml\u30d5\u30a1\u30a4\u30eb\u306e\u8a2d\u5b9a\u65b9\u6cd5\u306b\u3082\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n<p>\u305d\u308c\u307e\u3067\u306eapp.yaml\u30d5\u30a1\u30a4\u30eb\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306bapi_version\u306b\u306f\u5358\u306bgo1\u3068\u3060\u3051\u66f8\u3044\u3066\u3044\u307e\u3057\u305f\u3002<br \/>\n\u3053\u308c\u306fGo1\u306e\u9593\u306f\u5f8c\u65b9\u4e92\u63db\u304c\u4fdd\u305f\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u30de\u30a4\u30ca\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u6307\u5b9a\u306f\u4e0d\u8981\u3068\u3044\u3046\u7406\u7531\u304b\u3089\u3060\u3068\u63a8\u6e2c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"na\">api_version<\/span><span class=\"pi\">:<\/span> <span class=\"s\">go1<\/span>\r\n<\/code><\/pre>\n<p>\u4e00\u65b9\u3001\u65b0\u3057\u3044\u6307\u5b9a\u306e\u65b9\u6cd5\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3001\u30de\u30a4\u30ca\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u307e\u3067\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"na\">api_version<\/span><span class=\"pi\">:<\/span> <span class=\"s\">go1.8<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u308c\u306b\u3088\u308a\u3001Go\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u6307\u5b9a\u3057\u3066\u30e9\u30f3\u30bf\u30a4\u30e0\u3092\u5207\u308a\u66ff\u3048\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<h3>\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u8a73\u7d30\u306b\u6307\u5b9a\u3059\u3079\u304d\u7406\u7531<\/h3>\n<p>\u65b0\u3057\u3044Google App Engine\u306eSDK\u304b\u3089\u306f\u3001app.yaml\u30d5\u30a1\u30a4\u30eb\u306eapi_version\u306b\u30de\u30a4\u30ca\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3057\u305f\u3002<br \/>\n\u3057\u304b\u3057\u3001\u5f8c\u65b9\u4e92\u63db\u306e\u305f\u3081\u306b\u30de\u30a4\u30ca\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u6307\u5b9a\u3057\u306a\u304f\u3066\u3082api_version: go1\u306e\u3088\u3046\u306b\u6307\u5b9a\u3057\u3066\u3082Google App Engine\u306eSDK\u3067\u5b9a\u3081\u3089\u308c\u305f\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u4f7f\u308f\u308c\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u5909\u66f4\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305f\u5f53\u521d\u3067\u306f\u3001\u30de\u30a4\u30ca\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u306b\u306f\u3001Go1.6\u3068\u3057\u3066\u30c7\u30d7\u30ed\u30a4\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u3057\u304b\u3057\u3001\u305d\u306e\u5f8c\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u3067\u30c7\u30d5\u30a9\u30eb\u30c8\u304cGo1.8\u306b\u5909\u66f4\u306b\u306a\u3063\u305f\u306e\u3067\u3059\u3002<\/p>\n<p>\u305d\u306e\u305f\u3081\u3001\u30d7\u30ed\u30c0\u30af\u30c8\u3092\u958b\u767a\u3059\u308b\u4e0a\u3067\u30de\u30a4\u30ca\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u6307\u5b9a\u305b\u305a\u306b\u30c7\u30d7\u30ed\u30a4\u3057\u3066\u3044\u308b\u3068\u3001\u3042\u308b\u65e5\u7a81\u7136\u610f\u56f3\u3057\u306a\u3044\u30de\u30a4\u30ca\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u52d5\u4f5c\u3059\u308b\u3053\u3068\u304c\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>\u306a\u305cGo\u306e\u30e9\u30f3\u30bf\u30a4\u30e0\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u7a81\u7136\u5909\u308f\u308b\u3068\u554f\u984c\u306a\u306e\u3067\u3057\u3087\u3046\u304b\u3002<br \/>\n\u30d0\u30fc\u30b8\u30e7\u30f3\u3068build constraints\u306b\u307e\u3064\u308f\u308b\u3001\u73fe\u5b9f\u306b\u8d77\u304d\u3046\u308b\u8a71\u3092\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>\u30d0\u30fc\u30b8\u30e7\u30f3\u3068build constraints\u306b\u307e\u3064\u308f\u308b\u6016\u3044\u8a71<\/h3>\n<p>build constraints\u3068\u306f\u3001\u30d3\u30eb\u30c9\u30bf\u30b0\u3068\u3057\u3066\u77e5\u3089\u308c\u308bOS\u3084\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3001Go\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3088\u3063\u3066\u30d3\u30eb\u30c9\u5bfe\u8c61\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u5207\u308a\u66ff\u3048\u308b\u305f\u3081\u306e\u3057\u304f\u307f\u3067\u3059\u3002<br \/>\n\u4f8b\u3048\u3070\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u5148\u982d\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u6307\u5b9a\u3057\u3066\u66f8\u304f\u3068\u3001\u305d\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u4ee5\u964d\u306eGo\u306e\u30b3\u30f3\u30d1\u30a4\u30e9\u3067\u3057\u304b\u30d3\u30eb\u30c9\u5bfe\u8c61\u306b\u306a\u308a\u307e\u305b\u3093\u3002\u3064\u307e\u308a\u4ee5\u4e0b\u306e\u4f8b\u3067\u306f\u3001Go1.7\u4ee5\u4e0a\u3067\u3057\u304b\u30d3\u30eb\u30c9\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c\">\/\/ +build go1.7<\/span>\r\n<\/code><\/pre>\n<p>build constraints\u306f\u3001\u975e\u5e38\u306b\u4fbf\u5229\u3067\u591a\u304f\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u306a\u3069\u3067\u6d3b\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br \/>\n\u3057\u304b\u3057\u3001app.yaml\u30d5\u30a1\u30a4\u30eb\u3067\u30de\u30a4\u30ca\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u6307\u5b9a\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u306b\u975e\u5e38\u306b\u5384\u4ecb\u306a\u554f\u984c\u306b\u76f4\u9762\u3057\u307e\u3059\u3002<\/p>\n<p>api_version\u306bgo1\u3092\u6307\u5b9a\u3057\u3066\u3044\u305f\u5834\u5408\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306eGo\u306e\u30b3\u30f3\u30d1\u30a4\u30e9\u3067\u30d3\u30eb\u30c9\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u305d\u3057\u3066\u3001\u4f7f\u7528\u3057\u3066\u3044\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u5185\u3067build constraints\u3067\u30d3\u30eb\u30c9\u3092Go\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3088\u3063\u3066\u5206\u3051\u3066\u3044\u308b\u5834\u5408\u306b\u554f\u984c\u304c\u751f\u3058\u3066\u3057\u307e\u3046\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\uff12\u3064\u306e\u30b3\u30fc\u30c9\u306b\u3064\u3044\u3066\u8003\u3048\u3066\u307f\u307e\u3059\u3002<br \/>\n\u4e0a\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001build constraints\u306b\u3088\u3063\u3066Go1.6\u4ee5\u4e0b\u306e\u30b3\u30f3\u30d1\u30a4\u30e9\u3067\u3057\u304b\u30d3\u30eb\u30c9\u3067\u304d\u306a\u3044\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u4e00\u65b9\u3067\u3001\u4e0b\u306e\u30b3\u30fc\u30c9\u3067\u306fGo1.7\u4ee5\u4e0a\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3055\u308c\u308b\u3088\u3046\u306b\u6307\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br \/>\n\u3069\u3061\u3089\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u3082Hello\u95a2\u6570\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u304a\u308a\u3001Go\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3088\u3063\u3066\u6319\u52d5\u304c\u7570\u306a\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\n\u3053\u308c\u307e\u3067Go1.6\u3092\u4f7f\u3063\u3066\u30d3\u30eb\u30c9\u3055\u308c\u3066\u3044\u305f\u5834\u5408\u306b\u3001\u3042\u308b\u65e5\u7a81\u7136Go1.8\u3067\u30c7\u30d7\u30ed\u30a4\u3055\u308c\u305f\u3068\u3059\u308b\u3068\u3001\u305d\u308c\u4ee5\u964dHello\u95a2\u6570\u304cpanic\u3092\u8d77\u3053\u3057\u59cb\u3081\u307e\u3059\u3002<br \/>\n\u30d3\u30eb\u30c9\u6642\u306b\u306f\u7279\u306b\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u308b\u8a33\u3067\u306f\u306a\u3044\u305f\u3081\u3001\u30c7\u30d7\u30ed\u30a4\u3057\u3066\u5b9f\u969b\u306b\u52d5\u304b\u3059\u307e\u3067\u7570\u5e38\u306b\u6c17\u304c\u3064\u304f\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c\">\/\/ +build !go1.7<\/span>\r\n\r\n<span class=\"k\">package<\/span> <span class=\"n\">hello<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">Hello<\/span><span class=\"p\">()<\/span> <span class=\"kt\">string<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"s\">\"Hello\"<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"c\">\/\/ +build go1.7<\/span>\r\n\r\n<span class=\"k\">package<\/span> <span class=\"n\">hello<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">Hello<\/span><span class=\"p\">()<\/span> <span class=\"kt\">string<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nb\">panic<\/span><span class=\"p\">(<\/span><span class=\"s\">\"error\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"s\">\"\"<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u3053\u3067\u898b\u305f\u4f8b\u306f\u975e\u5e38\u306b\u6975\u7aef\u3067\u3059\u304c\u3001\u4f3c\u305f\u3088\u3046\u306a\u554f\u984c\u304c\u751f\u3058\u308b\u3053\u3068\u306f\u5341\u5206\u306b\u8003\u3048\u3089\u308c\u307e\u3059\u3002<br \/>\n\u5b9f\u969b\u306b\u3001\u4e00\u90e8\u306eWeb\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u53d6\u308a\u56de\u3057\u3092Go\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3088\u3063\u3066\u5206\u3051\u3066\u3044\u308b\u4e8b\u4f8b\u304c\u3042\u308a\u307e\u3057\u305f\u3002<br \/>\n\u5b89\u5168\u306b\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u5c0e\u5165\u3059\u308b\u306b\u306f\u3001\u5c0e\u5165\u306e\u969b\u306bbuild constraints\u3092\u3057\u3066\u3044\u308b\u304b\u8abf\u3079\u3001\u73fe\u5728\u4f7f\u7528\u3057\u3066\u3044\u308b\u30d0\u30fc\u30b8\u30e7\u30f3\u4ee5\u5916\u3067\u3069\u3046\u306e\u3088\u3046\u306a\u6319\u52d5\u3092\u3059\u308b\u304b\u3092\u5341\u5206\u306b\u691c\u8a3c\u3059\u308b\u3053\u3068\u3067\u3059\u3002<br \/>\n\u3057\u304b\u3057\u3001\u73fe\u5b9f\u7684\u306b\u306f\u6700\u4f4e\u9650\u30e9\u30f3\u30bf\u30a4\u30e0\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u4e0a\u3052\u308b\u969b\u306b\u691c\u8a3c\u3059\u308b\u3053\u3068\u3092\u30aa\u30b9\u30b9\u30e1\u3057\u307e\u3059\u3002<br \/>\n\u307e\u305f\u305d\u308c\u4ee5\u524d\u306b\u3001api_version\u306e\u6307\u5b9a\u306fgo1.8\u306e\u3088\u3046\u306b\u3001\u30de\u30a4\u30ca\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u3082\u542b\u3081\u3066\u30d0\u30fc\u30b8\u30e7\u30f3\u6307\u5b9a\u3092\u884c\u3046\u3088\u3046\u306b\u3059\u308b\u3068\u3088\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<h2>\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u6b74\u53f2\u306b\u307e\u3064\u308f\u308b\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306e\u4e92\u63db\u6027\u3068\u578b\u30a8\u30a4\u30ea\u30a2\u30b9<\/h2>\n<h3>\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u904d\u6b74\u3068Go\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7<\/h3>\n<p>Google App Engine\u4e0a\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304b\u3089Google Cloud Platform\u304c\u63d0\u4f9b\u3059\u308b\u6a5f\u80fd\u3092\u7528\u3044\u308b\u306b\u306f\u3001\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3068\u3044\u3046\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\n\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306f\u591a\u304f\u306e\u5834\u5408\u306b\u95a2\u6570\u3084\u30e1\u30bd\u30c3\u30c9\u306e\u7b2c1\u5f15\u6570\u306b\u53d6\u308a\u307e\u3059\u3002<br \/>\n\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u30b3\u30fc\u30c9\u306fCloud Datastore\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308bGet\u95a2\u6570\u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u307e\u3059\u3002\u305d\u3057\u3066\u3001\u7b2c1\u5f15\u6570\u306ectx\u306f\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">var<\/span> <span class=\"n\">data<\/span> <span class=\"n\">Data<\/span>\r\n<span class=\"k\">if<\/span> <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">datastore<\/span><span class=\"o\">.<\/span><span class=\"n\">Get<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span><span class=\"p\">,<\/span> <span class=\"n\">key<\/span><span class=\"p\">,<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">data<\/span><span class=\"p\">);<\/span> <span class=\"n\">err<\/span> <span class=\"o\">!=<\/span> <span class=\"no\">nil<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ \u30a8\u30e9\u30fc\u51e6\u7406<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u306e\u3088\u3046\u306bGoogle App Engine\u3067\u306f\u3001\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3092\u591a\u7528\u3059\u308b\u306e\u3067\u3059\u304c\u3001\u6b74\u53f2\u7684\u7d4c\u7def\u304b\u3089\u4eca\u307e\u3067\u6b21\u306e3\u7a2e\u985e\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u304c\u5b58\u5728\u3057\u307e\u3057\u305f\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">appengine.Context<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">golang.org\/x\/net\/context.Context<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">context.Context<\/ul>\n<p>appengine.Context\u306f\u6700\u3082\u53e4\u3044\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u3059\u3002<br \/>\n\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3068\u3044\u3046\u6982\u5ff5\u304cGo\u306e\u6a19\u6e96\u306b\u5165\u308b\u524d\u304b\u3089\u5b58\u5728\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>golang.org\/x\/net\/context.Context\u306fGo1.6\u307e\u3067\u5229\u7528\u3055\u308c\u3066\u3044\u305f\u6e96\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u3068\u3057\u3066\u63d0\u4f9b\u3055\u308c\u3066\u3044\u305f\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u3059\u3002Google App Engine\u306e\u30e9\u30f3\u30bf\u30a4\u30e0\u304cGo1.8\u3078\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u3055\u308c\u308b\u6bb5\u968e\u3067context.Context\u304c\u5229\u7528\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<p>context.Context\u306fGo1.7\u4ee5\u964d\u306b\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u306b\u5c0e\u5165\u3055\u308c\u305f\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u3001\u4e2d\u8eab\u306fGo1.6\u4ee5\u524d\u306egolang.org\/x\/net\/context.Context\u3068\u540c\u3058\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u305f\u3081\u3001\u30e9\u30f3\u30bf\u30a4\u30e0\u304cGo1.6\u304b\u3089Go1.8\u306b\u5909\u308f\u308b\u969b\u306b\u3001\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u4e92\u63db\u6027\u306b\u3064\u3044\u3066\u8b70\u8ad6\u304c\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u305d\u3057\u3066\u3001Go1.9\u3078\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3055\u308c\u308b\u969b\u306b\u578b\u30a8\u30a4\u30ea\u30a2\u30b9\u306e\u767b\u5834\u306b\u3088\u3063\u3066\u3001\u3055\u3089\u306b\u72b6\u6cc1\u304c\u5909\u308f\u3063\u3066\u304d\u307e\u3057\u305f\u3002\u3053\u3053\u3067\u306f\u3001Go1.6\u304b\u3089Go1.8\u3001\u305d\u3057\u3066Go1.9\u306b\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3055\u308c\u3066\u3044\u304f\u4e2d\u3067\u3001\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u4e92\u63db\u6027\u304c\u3069\u306e\u3088\u3046\u306b\u5909\u5316\u3057\u3066\u3044\u3063\u305f\u306e\u304b\u3068\u3044\u3046\u70b9\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u305d\u3057\u3066\u3001\u305d\u306e\u4e2d\u3067\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306e\u4e92\u63db\u6027\u3068\u578b\u30a8\u30a4\u30ea\u30a2\u30b9\u306e\u5b58\u5728\u610f\u7fa9\u306b\u3064\u3044\u3066\u8b70\u8ad6\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h3>Go\u306e\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9<\/h3>\n<p>Go\u306e\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306b\u3064\u3044\u3066\u8a73\u3057\u3044\u89e3\u8aac\u306f&#8221;\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3&#8221;\u3068\u3044\u3046\u8a18\u4e8b\u306b\u66f8\u3044\u3066\u3044\u307e\u3059\u306e\u3067\u305d\u3061\u3089\u3092\u53c2\u7167\u3057\u3066\u4e0b\u3055\u3044\u3002\u3053\u3053\u3067\u306f\u7c21\u5358\u306b\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306e\u89e3\u8aac\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n<p>\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u30ea\u30b9\u30c8\u3067\u3059\u3002\u3042\u308b\u578b\u304c\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u3068\u3044\u3046\u3053\u3068\u306f\u3001\u305d\u306e\u578b\u304c\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3067\u5b9a\u7fa9\u3057\u3066\u3044\u308b\u30e1\u30bd\u30c3\u30c9\u3092\u3059\u3079\u3066\u6301\u3063\u3066\u3044\u308b\u3068\u3044\u3046\u72b6\u614b\u3092\u6307\u3057\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u3088\u3046\u306a\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3092\u8003\u3048\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">InterfaceA<\/span> <span class=\"k\">interface<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"n\">M<\/span><span class=\"p\">()<\/span> <span class=\"kt\">string<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>InterfaceA\u306fM() string\u3068\u3044\u3046\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3061\u307e\u3059\u3002<br \/>\n\u3064\u307e\u308a\u3001\u3053\u306e\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30e1\u30bd\u30c3\u30c9M\u3092\u6301\u3064\u578b\u3092\u5b9a\u7fa9\u3057\u3066\u3084\u308c\u3070\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">Str<\/span> <span class=\"kt\">string<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"p\">(<\/span><span class=\"n\">s<\/span> <span class=\"n\">Str<\/span><span class=\"p\">)<\/span> <span class=\"n\">M<\/span><span class=\"p\">()<\/span> <span class=\"kt\">string<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">return<\/span> <span class=\"kt\">string<\/span><span class=\"p\">(<\/span><span class=\"n\">s<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3069\u306e\u3088\u3046\u306a\u578b\u3067\u3082\u69cb\u3044\u307e\u305b\u3093\u304c\u3001\u3068\u306b\u304b\u304f\u30e1\u30bd\u30c3\u30c9M\u3092\u540c\u3058\u30b7\u30b0\u30cb\u30c1\u30e3\u3067\u5b9a\u7fa9\u3057\u3066\u3044\u308c\u3070\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002<br \/>\n\u3053\u306e\u3068\u304d\u3001Str\u578b\u306e\u5b9a\u7fa9\u306b\u306f\u3001implements\u306e\u3088\u3046\u306b\u660e\u793a\u7684\u306bInterfaceA\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3092\u8868\u3059\u8a18\u8ff0\u306f\u5fc5\u8981\u3042\u308a\u307e\u305b\u3093\u3002\u5358\u306b\u30e1\u30bd\u30c3\u30c9\u3092\u7528\u610f\u3059\u308b\u3060\u3051\u3067\u3001\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3057\u305f\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3055\u3066\u3001\u3053\u306eGo\u306e\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306e\u7279\u5fb4\u3092\u8e0f\u307e\u3048\u3066\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3068\u578b\u30a8\u30a4\u30ea\u30a2\u30b9\u306e\u8b70\u8ad6\u3092\u9032\u3081\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u540c\u58eb\u306e\u4e92\u63db<\/h3>\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3001\u540c\u3058\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u30642\u3064\u306e\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">InterfaceA<\/span> <span class=\"k\">interface<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"n\">M<\/span><span class=\"p\">()<\/span> <span class=\"kt\">string<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">type<\/span> <span class=\"n\">InterfaceB<\/span> <span class=\"k\">interface<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"n\">M<\/span><span class=\"p\">()<\/span> <span class=\"kt\">string<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>InterfaceA\u3068InterfaceB\u306f\u540c\u3058\u30b7\u30b0\u30cb\u30c1\u30e3\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3061\u307e\u3059\u3002<br \/>\n\u305d\u306e\u305f\u3081\u3001InterfaceA\u3092\u5b9f\u88c5\u3057\u3066\u3044\u308c\u3070\u3001\u81ea\u305a\u3068InterfaceB\u3082\u5b9f\u88c5\u3057\u3066\u3044\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3064\u307e\u308a\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u660e\u793a\u7684\u306b\u578b\u5909\u63db\u3092\u884c\u308f\u305a\u306b\u3001\u305d\u308c\u305e\u308c\u306e\u578b\u306e\u5909\u6570\u3092\u4ee3\u5165\u3057\u3042\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">InterfaceA<\/span> <span class=\"k\">interface<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"n\">M<\/span><span class=\"p\">()<\/span> <span class=\"kt\">string<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">type<\/span> <span class=\"n\">InterfaceB<\/span> <span class=\"k\">interface<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"n\">M<\/span><span class=\"p\">()<\/span> <span class=\"kt\">string<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">var<\/span> <span class=\"n\">a<\/span> <span class=\"n\">InterfaceA<\/span>\r\n<span class=\"k\">var<\/span> <span class=\"n\">b<\/span> <span class=\"n\">InterfaceB<\/span>\r\n\r\n<span class=\"n\">a<\/span><span class=\"p\">,<\/span> <span class=\"n\">b<\/span> <span class=\"o\">=<\/span> <span class=\"n\">b<\/span><span class=\"p\">,<\/span> <span class=\"n\">a<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u3053\u3067\u6700\u521d\u306b\u51fa\u3066\u304d\u305f\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u8a71\u984c\u306b\u623b\u308a\u307e\u3057\u3087\u3046\u3002<br \/>\ngolang.org\/x\/net\/context.Context\u578b\u306fGo1.8\u307e\u3067\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">Context<\/span> <span class=\"k\">interface<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"n\">Deadline<\/span><span class=\"p\">()<\/span> <span class=\"p\">(<\/span><span class=\"n\">deadline<\/span> <span class=\"n\">time<\/span><span class=\"o\">.<\/span><span class=\"n\">Time<\/span><span class=\"p\">,<\/span> <span class=\"n\">ok<\/span> <span class=\"kt\">bool<\/span><span class=\"p\">)<\/span>\r\n  <span class=\"n\">Done<\/span><span class=\"p\">()<\/span> <span class=\"o\">&lt;-<\/span><span class=\"k\">chan<\/span> <span class=\"k\">struct<\/span><span class=\"p\">{}<\/span>\r\n  <span class=\"n\">Err<\/span><span class=\"p\">()<\/span> <span class=\"kt\">error<\/span>\r\n  <span class=\"n\">Value<\/span><span class=\"p\">(<\/span><span class=\"n\">key<\/span> <span class=\"k\">interface<\/span><span class=\"p\">{})<\/span> <span class=\"k\">interface<\/span><span class=\"p\">{}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4e00\u65b9\u3001Go1.7\u304b\u3089\u63d0\u4f9b\u3055\u308c\u3066\u3044\u308b\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u306econtext.Context\u578b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">Context<\/span> <span class=\"k\">interface<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"n\">Deadline<\/span><span class=\"p\">()<\/span> <span class=\"p\">(<\/span><span class=\"n\">deadline<\/span> <span class=\"n\">time<\/span><span class=\"o\">.<\/span><span class=\"n\">Time<\/span><span class=\"p\">,<\/span> <span class=\"n\">ok<\/span> <span class=\"kt\">bool<\/span><span class=\"p\">)<\/span>\r\n  <span class=\"n\">Done<\/span><span class=\"p\">()<\/span> <span class=\"o\">&lt;-<\/span><span class=\"k\">chan<\/span> <span class=\"k\">struct<\/span><span class=\"p\">{}<\/span>\r\n  <span class=\"n\">Err<\/span><span class=\"p\">()<\/span> <span class=\"kt\">error<\/span>\r\n  <span class=\"n\">Value<\/span><span class=\"p\">(<\/span><span class=\"n\">key<\/span> <span class=\"k\">interface<\/span><span class=\"p\">{})<\/span> <span class=\"k\">interface<\/span><span class=\"p\">{}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5404\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u898b\u308b\u3068\u3001\u3059\u3079\u3066\u306e\u30e1\u30bd\u30c3\u30c9\u306e\u30b7\u30b0\u30cb\u30c1\u30e3\u304c\u4e00\u81f4\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<br \/>\n\u3064\u307e\u308a\u3001golang.org\/x\/net\/context.Context\u3092\u5b9f\u88c5\u3059\u308b\u578b\u306f\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u306econtext.Context\u3082\u5b9f\u88c5\u3057\u3066\u3044\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\n\u305d\u306e\u305f\u3081\u3001\u5f15\u6570\u3067golang.org\/x\/net\/context.Context\u578b\u3068\u3057\u3066\u6e21\u3055\u308c\u3066\u304d\u305f\u5024\u306f\u3001\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u306econtext.Contextx\u3092\u5f15\u6570\u306b\u53d6\u308b\u95a2\u6570\u306b\u3001\u7279\u306b\u306a\u306b\u3082\u305b\u305a\u305d\u306e\u307e\u307e\u6e21\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u3088\u3046\u306aGo\u306e\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306e\u7279\u5fb4\u304b\u3089Google App Engine\u306b\u304a\u3044\u3066\u3082\u3001Go1.6\u304b\u3089Go1.8\u306b\u79fb\u884c\u3059\u308b\u969b\u306b\u3001\u5927\u304d\u306a\u554f\u984c\u304c\u8d77\u304d\u305a\u306bimport\u3092golang.org\/x\/net\/context\u304b\u3089context\u306b\u5909\u66f4\u3059\u308b\u3060\u3051\u3067\u5927\u90e8\u5206\u306f\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u306econtext.Context\u306b\u79fb\u884c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n<p>\u3057\u304b\u3057\u3001\u3044\u304f\u3064\u304b\u79fb\u884c\u306e\u969b\u306b\u554f\u984c\u304c\u751f\u3058\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3092\u5f15\u6570\u3068\u3057\u3066\u53d6\u308b\u3088\u3046\u306a\u95a2\u6570\u3092\u8003\u3048\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">InterfaceA<\/span> <span class=\"k\">interface<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"n\">M<\/span><span class=\"p\">()<\/span> <span class=\"kt\">string<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">callM<\/span><span class=\"p\">(<\/span><span class=\"n\">a<\/span> <span class=\"n\">InterfaceA<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"n\">a<\/span><span class=\"o\">.<\/span><span class=\"n\">M<\/span><span class=\"p\">()<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u95a2\u6570callM\u306f\u5f15\u6570\u3068\u3057\u3066InterfaceA\u578b\u306e\u5024\u3092\u53d6\u308a\u307e\u3059\u3002<br \/>\n\u3055\u3066\u3001\u3053\u3053\u3067\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u95a2\u6570callM\u3092\u5909\u6570\u306b\u3044\u308c\u308b\u3053\u3068\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">var<\/span> <span class=\"n\">f<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">InterfaceA<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"n\">callM<\/span>\r\n<\/code><\/pre>\n<p>\u6b21\u306b\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306bInterfaceB\u578b\u306e\u5024\u3092\u5f15\u6570\u3068\u3057\u3066\u53d6\u308b\u95a2\u6570\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">InterfaceB<\/span> <span class=\"k\">interface<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"n\">M<\/span><span class=\"p\">()<\/span> <span class=\"kt\">string<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">callM2<\/span><span class=\"p\">(<\/span><span class=\"n\">b<\/span> <span class=\"n\">InterfaceB<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"n\">b<\/span><span class=\"o\">.<\/span><span class=\"n\">M<\/span><span class=\"p\">()<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3055\u3066\u3001\u95a2\u6570callM2\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306bfunc(InterfaceA)\u578b\u306e\u5909\u6570f\u306b\u4ee3\u5165\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">var<\/span> <span class=\"n\">f<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">InterfaceA<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"n\">callM2<\/span>\r\n<\/code><\/pre>\n<p>\u7b54\u3048\u306f\u3067\u304d\u307e\u305b\u3093\u3002<br \/>\n\u5909\u6570f\u306e\u578b\u306ffunc(InterfaceA)\u3067\u3059\u3002<br \/>\n\u5f15\u6570\u306e\u578b\u304cInterfaceA\u3067\u3042\u308b\u70b9\u304ccallM2\u3068\u7570\u306a\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\n\u305f\u3068\u3048InterfaceA\u3068InterfaceB\u304c\u6301\u3064\u30e1\u30bd\u30c3\u30c9\u30ea\u30b9\u30c8\u304c\u540c\u3058\u3067\u3042\u3063\u3066\u3082\u3001\u578b\u3068\u3057\u3066\u306f\u5225\u3082\u306e\u3067\u3042\u308b\u305f\u3081\u3001\u4ee3\u5165\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<p>\u305d\u306e\u305f\u3081\u3001golang.org\/x\/net\/context.Context\u3092\u5f15\u6570\u306b\u53d6\u308b\u95a2\u6570\u3068context.Context\u3092\u5f15\u6570\u306b\u3068\u308b\u95a2\u6570\u306f\u5225\u306e\u578b\u3068\u3044\u3046\u6271\u3044\u306b\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<br \/>\n\u4f8b\u3048\u3070\u3001Cloud Datastore\u3092\u6271\u3046\u305f\u3081\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u3067\u3042\u308bgoogle.golang.org\/appengine\/datastore\u30d1\u30c3\u30b1\u30fc\u30b8\u306eRunInTransaction\u3067\u306f\u5f15\u6570\u306bfunc(context.Context) error\u578b\u306e\u95a2\u6570\u3092\u53d6\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u95a2\u6570\u306e\u7b2c1\u5f15\u6570\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306f\u3001\u57f7\u7b46\u6642\u306f\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u306econtext.Context\u3067\u306f\u306a\u304f\u3001golang.org\/x\/net\/context.Context\u3067\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u3044\u305f\u3068\u3057\u307e\u3059\u3002<br \/>\n\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306f\u3001Go1.6\u307e\u3067\u4f7f\u7528\u3055\u308c\u3066\u3044\u305f\u6e96\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u306egolang.org\/x\/net\/context.Context\u3092\u7528\u3044\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"s\">\"golang.org\/x\/net\/context\"<\/span>\r\n<span class=\"c\">\/\/ ...\u7565<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">doSomething<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"c\">\/\/ ...\u7565<\/span>\r\n  <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">datastore<\/span><span class=\"o\">.<\/span><span class=\"n\">RunInTransaction<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span><span class=\"p\">,<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">)<\/span> <span class=\"kt\">error<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ \u4f55\u304b\u51e6\u7406<\/span>\r\n  <span class=\"p\">},<\/span> <span class=\"no\">nil<\/span><span class=\"p\">)<\/span>\r\n  <span class=\"c\">\/\/ ...\u7565<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u306econtext.Context\u3092\u7528\u3044\u308b\u3088\u3046\u306b\u4fee\u6b63\u3059\u308b\u3053\u3068\u3092\u8003\u3048\u307e\u3059\u3002<br \/>\nimport\u306e\u90e8\u5206\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u304d\u63db\u3048\u308c\u3070\u3088\u3046\u3055\u305d\u3046\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"s\">\"context\"<\/span>\r\n<span class=\"c\">\/\/ ...\u7565<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">doSomething<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"c\">\/\/ ...\u7565<\/span>\r\n  <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">datastore<\/span><span class=\"o\">.<\/span><span class=\"n\">RunInTransaction<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span><span class=\"p\">,<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">)<\/span> <span class=\"kt\">error<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ \u4f55\u304b\u51e6\u7406<\/span>\r\n  <span class=\"p\">},<\/span> <span class=\"no\">nil<\/span><span class=\"p\">)<\/span>\r\n  <span class=\"c\">\/\/ ...\u7565<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3057\u304b\u3057\u3001\u3053\u306e\u307e\u307e\u3060\u3068\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<br \/>\ndatastore.RunInTransaction\u95a2\u6570\u306e\u7b2c1\u5f15\u6570\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u578b\u306fgolang.org\/x\/net\/context.Context\u578b\u306a\u306e\u3067\u3001\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u306econtext.Context\u578b\u306e\u5024\u3092\u6e21\u3057\u3066\u3082\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306f\u306a\u308a\u307e\u305b\u3093\u3002<br \/>\n\u4e00\u65b9\u3067\u3001\u7b2c2\u5f15\u6570\u306b\u53d6\u308b\u95a2\u6570\u306e\u578b\u306ffunc(context.Context) error\u3067\u3059\u3002<br \/>\n\u3053\u306e\u95a2\u6570\u304c\u5f15\u6570\u306b\u53d6\u3063\u3066\u3044\u308b\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306f\u3001golang.org\/x\/net\/context.Context\u578b\u3067\u3059\u3002<br \/>\n\u305d\u306e\u305f\u3081\u3001\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u306econtext.Context\u3092\u5f15\u6570\u306b\u53d6\u308b\u95a2\u6570\u3092\u6e21\u3057\u3066\u3057\u307e\u3046\u3068\u578b\u304c\u7570\u306a\u308b\u305f\u3081\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u95a2\u6570\u3092\u30e9\u30c3\u30d7\u3057\u3066\u578b\u3092\u5909\u63db\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"s\">\"context\"<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"n\">netctx<\/span> <span class=\"s\">\"golang.org\/x\/net\/context\"<\/span>\r\n<span class=\"c\">\/\/ ...\u7565<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">wrap<\/span><span class=\"p\">(<\/span><span class=\"n\">f<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">)<\/span> <span class=\"kt\">error<\/span><span class=\"p\">)<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">netctx<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">)<\/span> <span class=\"kt\">error<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">return<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">nctx<\/span> <span class=\"n\">netctx<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">)<\/span> <span class=\"kt\">error<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">f<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span><span class=\"p\">)<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">doSomething<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"c\">\/\/ ...\u7565<\/span>\r\n  <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">datastore<\/span><span class=\"o\">.<\/span><span class=\"n\">RunInTransaction<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span><span class=\"p\">,<\/span> <span class=\"n\">wrap<\/span><span class=\"p\">(<\/span><span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">)<\/span> <span class=\"kt\">error<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ \u4f55\u304b\u51e6\u7406<\/span>\r\n  <span class=\"p\">}),<\/span> <span class=\"no\">nil<\/span><span class=\"p\">)<\/span>\r\n  <span class=\"c\">\/\/ ...\u7565<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001\u540c\u3058\u30e1\u30bd\u30c3\u30c9\u30ea\u30b9\u30c8\u3092\u6301\u3064\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u540c\u58eb\u306f\u3001\u4e00\u898b\u3001\u4e92\u63db\u6027\u304c\u3042\u308b\u3088\u3046\u306b\u898b\u3048\u307e\u3059\u3002<br \/>\n\u3057\u304b\u3057\u3001\u5b9f\u969b\u306b\u306f\u578b\u304c\u7570\u306a\u308b\u305f\u3081\u5b8c\u5168\u306a\u4e92\u63db\u6027\u3068\u3044\u3046\u3082\u306e\u306f\u3042\u308a\u307e\u305b\u3093\u3002<br \/>\n\u305d\u306e\u305f\u3081\u3001Go1.8\u307e\u3067\u306f\u6e96\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u306egolang.org\/x\/net\/context.Context\u578b\u304b\u3089\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u306econtext.Context\u578b\u306b\u79fb\u884c\u3059\u308b\u305f\u3081\u306b\u306f\u4e00\u7b4b\u7e04\u3067\u306f\u3044\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002<br \/>\n\u3053\u306e\u3088\u3046\u306a\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b\u3001Go1.9\u3067\u306f\u578b\u30a8\u30a4\u30ea\u30a2\u30b9\u3068\u3044\u3046\u6a5f\u80fd\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002<br \/>\n\u6b21\u306b\u578b\u30a8\u30a4\u30ea\u30a2\u30b9\u3068\u305d\u308c\u304cGoogle App Engine\u306b\u304a\u3044\u3066\u3001\u3069\u306e\u3088\u3046\u306a\u6069\u6075\u3092\u4e0e\u3048\u308b\u304b\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h3>\u578b\u30a8\u30a4\u30ea\u30a2\u30b9\u3068Google App Engine\u306b\u304a\u3051\u308b\u6069\u6075<\/h3>\n<p>\u578b\u30a8\u30a4\u30ea\u30a2\u30b9\u306fGo1.9\u3067\u5c0e\u5165\u3055\u308c\u305f\u6982\u5ff5\u3067\u3059\u3002<br \/>\n\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5b9a\u7fa9\u304c\u3042\u3063\u305f\u5834\u5408\u3001Bar\u578b\u306fFoo\u578b\u306e\u578b\u30a8\u30a4\u30ea\u30a2\u30b9\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">Foo<\/span> <span class=\"k\">struct<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"n\">S<\/span> <span class=\"kt\">string<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">type<\/span> <span class=\"n\">Bar<\/span> <span class=\"o\">=<\/span> <span class=\"n\">Foo<\/span>\r\n<\/code><\/pre>\n<p>Bar\u578b\u306f\u3001Foo\u578b\u3092\u57fa\u306b\u3057\u305f\u65b0\u3057\u3044\u578b\u3067\u306f\u306a\u304f\u3001\u5b8c\u5168\u306b\u540c\u3058\u578b\u3067\u3059\u3002<br \/>\n\u578b\u30a8\u30a4\u30ea\u30a2\u30b9\u3067\u5b9a\u7fa9\u3057\u305f\u578b\u306b\u306f\u3001\u65b0\u3057\u304f\u30e1\u30bd\u30c3\u30c9\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3001int\u578b\u3092\u57fa\u306b\u3057\u305f\u578b\u3068int\u578b\u306e\u30a8\u30a4\u30ea\u30a2\u30b9\u578b\u306e\u540d\u524d\u3092\u8868\u793a\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<br \/>\n\u306a\u304a\u3001\u578b\u540d\u306e\u8868\u793a\u3059\u308b\u305f\u3081\u306b\u306f\u3001fmt.Printf\u95a2\u6570\u3067\u66f8\u5f0f\u3092%T\u3092\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">N<\/span> <span class=\"kt\">int<\/span>\r\n<span class=\"k\">type<\/span> <span class=\"n\">M<\/span> <span class=\"o\">=<\/span> <span class=\"kt\">int<\/span>\r\n<span class=\"k\">var<\/span> <span class=\"n\">n<\/span> <span class=\"n\">N<\/span> <span class=\"o\">=<\/span> <span class=\"m\">10<\/span>\r\n<span class=\"k\">var<\/span> <span class=\"n\">m<\/span> <span class=\"n\">M<\/span> <span class=\"o\">=<\/span> <span class=\"m\">10<\/span>\r\n<span class=\"c\">\/\/ main.N, int<\/span>\r\n<span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"%T, %T<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">n<\/span><span class=\"p\">,<\/span> <span class=\"n\">m<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u30b3\u30e1\u30f3\u30c8\u3067\u66f8\u3044\u3066\u3044\u308b\u3088\u3046\u306b\u3001main.N, int\u3068\u8868\u793a\u3055\u308c\u307e\u3059\u3002<br \/>\n\u5909\u6570n\u306e\u578b\u540d\u306f\u3001main.N\u3001\u5909\u6570m\u306fint\u3068\u306a\u308a\u307e\u3059\u3002<br \/>\n\u5909\u6570n\u306e\u578b\u306f\u3001int\u578b\u3092\u57fa\u306b\u3057\u3066\u65b0\u3057\u3044\u578b\u3068\u3057\u3066\u5b9a\u7fa9\u3057\u305fN\u578b\u3067\u3042\u308b\u305f\u3081\u3001\u305d\u306e\u578b\u540d\u304c\u8868\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br \/>\n\u4e00\u65b9\u3067M\u578b\u306f\u3001int\u578b\u306e\u30a8\u30a4\u30ea\u30a2\u30b9\u578b\u3067\u3042\u308b\u305f\u3081\u3001int\u3068\u8868\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001\u578b\u30a8\u30a4\u30ea\u30a2\u30b9\u306f\u65e2\u5b58\u306e\u578b\u306b\u65b0\u3057\u304f\u540d\u524d\u3092\u3064\u3051\u3001\u540c\u3058\u578b\u3068\u3057\u3066\u632f\u308b\u821e\u3063\u3066\u307b\u3057\u3044\u5834\u5408\u306b\u7528\u3044\u307e\u3059\u3002<br \/>\n\u3055\u3066\u3001\u3053\u306e\u578b\u30a8\u30a4\u30ea\u30a2\u30b9\u306f\u5b9f\u969b\u306e\u958b\u767a\u306e\u73fe\u5834\u3067\u3001\u3069\u306e\u3088\u3046\u306b\u4f7f\u3046\u3082\u306e\u306a\u306e\u3067\u3057\u3087\u3046\u304b\uff1f<br \/>\nGo\u30c1\u30fc\u30e0\u306eRuss Cox\u6c0f\u306e\u66f8\u3044\u305f&#8221;Codebase Refactoring (with help from Go)&#8221;\u3068\u3044\u3046\u8a18\u4e8b\u306b\u3088\u308b\u3068\u3001\u578b\u30a8\u30a4\u30ea\u30a2\u30b9\u306f\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306e\u305f\u3081\u306b\u958b\u767a\u3055\u308c\u305f\u3068\u8ff0\u3079\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u3001Google App Engine\u306b\u304a\u3051\u308b\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u904d\u6b74\u3092\u601d\u3044\u51fa\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<br \/>\n\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u578b\u306f\u6b21\u306e\u3088\u3046\u306b\u79fb\u308a\u5909\u308f\u3063\u3066\u304d\u307e\u3057\u305f\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">appengine.Context<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">golang.org\/x\/net\/context.Context<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">context.Context<\/ul>\n<p>\u305d\u3057\u3066\u3001\u6e96\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u306egolang.org\/x\/net\/context.Context\u578b\u304b\u3089\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u306econtext.Context\u578b\u306b\u79fb\u308a\u5909\u308f\u308b\u969b\u306b\u306f\u3001\u524d\u8ff0\u3057\u305f\u3088\u3046\u306a\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306e\u4e92\u63db\u6027\u304c\u554f\u984c\u306b\u306a\u308b\u5834\u5408\u304c\u3042\u308b\u3068\u8ff0\u3079\u307e\u3057\u305f\u3002<\/p>\n<p>\u3053\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b\u3001Go1.9\u306egolang.org\/x\/net\/context.Context\u578b\u306e\u5b9f\u88c5\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u306econtext.Context\u578b\u30a8\u30a4\u30ea\u30a2\u30b9\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">Context<\/span> <span class=\"o\">=<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span>\r\n<\/code><\/pre>\n<p>\u578b\u30a8\u30a4\u30ea\u30a2\u30b9\u3068\u3057\u3066\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3067\u3001\u578b\u306e\u4e92\u63db\u6027\u306e\u554f\u984c\u306f\u5b8c\u5168\u306b\u89e3\u6c7a\u3057\u307e\u3059\u3002<br \/>\nGo1.9\u4ee5\u964d\u3067\u306f\u3001golang.org\/x\/net\/context.Context\u578b\u306f\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u306econtext.Context\u3068\u5b8c\u5168\u306b\u4e00\u81f4\u3057\u307e\u3059\u3002<br \/>\n\u305d\u306e\u305f\u3081\u3001golang.org\/x\/net\/context\u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u4ee3\u308f\u308a\u306b\u3001\u6a19\u6e96\u306econtext\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\u3060\u3051\u3067\u79fb\u884c\u304c\u5b8c\u4e86\u3057\u307e\u3059\u3002<\/p>\n<p>\u57f7\u7b46\u6642\uff082018\u5e744\u6708\uff09\u306e\u6700\u65b0\u7248\u306eGoogle App Engine\u306eSDK\u3067\u306f\u3001Go1.9\u304c\u30d9\u30fc\u30bf\u7248\u3068\u3057\u3066\u5229\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\napp.yaml\u30d5\u30a1\u30a4\u30eb\u306eapi_version\u306bgo1.9\u3092\u6307\u5b9a\u3059\u308c\u3070\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>Go1.9\u304cGoogle App Engine\u3067\u5229\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u969b\u306b\u306f\u3001\u305c\u3072\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u79fb\u884c\u3092\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>\u304a\u308f\u308a\u306b<\/h2>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001Google App Engine\u306eGo\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u306b\u307e\u3064\u308f\u308b\u8a71\u3092Go\u306ebuild constraints\u3084\u578b\u30a8\u30a4\u30ea\u30a2\u30b9\u306a\u3069\u306e\u8a00\u8a9e\u6a5f\u80fd\u306e\u5074\u9762\u304b\u3089\u8b70\u8ad6\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\u3053\u3053\u3067\u8ff0\u3079\u305f\u4e8b\u304c\u8aad\u8005\u306e\u7686\u69d8\u304c\u3054\u81ea\u8eab\u306e\u74b0\u5883\u3067\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u3059\u308b\u969b\u306b\u304a\u5f79\u306b\u7acb\u3066\u3070\u5e78\u3044\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u306f\u3058\u3081\u306b \u30e1\u30eb\u30da\u30a4 \u30a8\u30ad\u30b9\u30d1\u30fc\u30c8\u30c1\u30fc\u30e0\u306e@tenntenn\u3067\u3059\u3002 \u3053\u306e\u8a18\u4e8b\u306f\u6280\u8853\u66f8\u51784\u3067\u9812\u5e03\u3057\u305f&#8221; [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44744","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>- Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/44744-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u306f\u3058\u3081\u306b \u30e1\u30eb\u30da\u30a4 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