{"id":45492,"date":"2023-04-17T08:33:41","date_gmt":"2023-03-11T10:47:26","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45492-2\/"},"modified":"2024-04-29T23:54:11","modified_gmt":"2024-04-29T15:54:11","slug":"45492-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45492-2\/","title":{"rendered":""},"content":{"rendered":"<h1>\u306f\u3058\u3081\u306b<\/h1>\n<p>\u666e\u6bb5\u306e\u304a\u4ed5\u4e8b\u3067\u306f JavaJava \u3057\u3066\u308b\u7b46\u8005\u3067\u3059\u3002<br \/>\nRust \u304c\u65ec\u3089\u3057\u3044\u306e\u3067\u3001\u8a66\u3057\u306b\u7c21\u5358\u306a GraphQL \u30b5\u30fc\u30d0\u30fc\u3092\u5efa\u3066\u3066\u307f\u307e\u3057\u305f\u3002<br \/>\n\u57fa\u672c\u7684\u306a\u6a5f\u80fd\u306f\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u983c\u308a\u307e\u3057\u305f\u304c\u3001Rust \u306e\u6587\u6cd5\u3092\u4e00\u901a\u308a\u78ba\u8a8d\u3059\u308b\u306b\u306f\u3061\u3087\u3046\u3069\u3044\u3044\u3088\u3046\u306b\u611f\u3058\u307e\u3057\u305f\u3002<br \/>\nGraphQL \u30b5\u30fc\u30d0\u30fc\u5efa\u3066\u305f\u3044\u3060\u3051\u306a\u3089\u4ed6\u306e\u8a00\u8a9e\u306e\u65b9\u304c\u3044\u3044\u3002<\/p>\n<p>\u6700\u7d42\u7684\u306a\u30b3\u30fc\u30c9\u306f\u3053\u3061\u3089\u3002<\/p>\n<h2>\u3053\u306e\u8a18\u4e8b\u306e\u5185\u5bb9<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u958b\u767a\u74b0\u5883\u69cb\u7bc9(Docker)<\/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\">\u958b\u767a\u4e2d\u306b\u5f15\u3063\u304b\u304b\u3063\u305f\u6587\u6cd5<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u4f7f\u3063\u3066\u307f\u305f\u6240\u611f<\/ul>\n<h2>\u958b\u767a\u74b0\u5883\u69cb\u7bc9(Docker)<\/h2>\n<p>\u30ed\u30fc\u30ab\u30eb\u6b7b\u3093\u3067\u3082\u6c5a\u3057\u305f\u304f\u306a\u3044\u30de\u30f3\u306a\u306e\u3067\u3001Docker \u3092\u4f7f\u3044\u307e\u3059\u3002\u3061\u306a\u307f\u306b\u7b46\u8005\u306f MacBook Pro \u3092\u305d\u306e\u307e\u307e\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002<br \/>\n\u666e\u901a\u306b\u30ed\u30fc\u30ab\u30eb\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u30de\u30a6\u30f3\u30c8\u3059\u308b\u3068\u3001\u30d3\u30eb\u30c9\u304c\u6b7b\u306c\u307b\u3069\u9045\u304f\u306a\u308a\u307e\u3059\u3002\u30d3\u30eb\u30c9\u6642\u306e\u30d5\u30a1\u30a4\u30eb\u540c\u671f\u51e6\u7406\u304c\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u306b\u306a\u3063\u3066\u3044\u308b\u3088\u3046\u3067\u3059\u3002<br \/>\nRust \u306e\u30d3\u30eb\u30c9\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a\u3060\u3068\u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u76f4\u4e0b\u306b\u7f6e\u304b\u308c\u307e\u3059\u3002\u5642\u306b\u3088\u308b\u3068Docker for Mac \u306e\u5834\u5408\u3001\u30de\u30a6\u30f3\u30c8\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u306e\u540c\u671f\u304c\u304b\u306a\u308a\u9045\u3044\u3093\u3060\u3068\u304b\u3002<\/p>\n<p>\u3068\u3044\u3046\u308f\u3051\u3067\u3001\u3053\u3061\u3089\u306e\u8a18\u4e8b\u3092\u53c2\u8003\u306b Dockerfile \u3092\u4f5c\u6210\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">FROM<\/span><span class=\"s\"> rust:1.41-buster<\/span>\r\n\r\n<span class=\"k\">WORKDIR<\/span><span class=\"s\"> \/usr\/src\/app<\/span>\r\n\r\n<span class=\"k\">RUN <\/span><span class=\"nv\">USER<\/span><span class=\"o\">=<\/span>root cargo init <span class=\"nt\">--bin<\/span>\r\n\r\n<span class=\"k\">ENV<\/span><span class=\"s\"> CARGO_TARGET_DIR=\/tmp\/target<\/span>\r\n\r\n<span class=\"k\">COPY<\/span><span class=\"s\"> .\/Cargo.toml Cargo.toml<\/span>\r\n<span class=\"k\">COPY<\/span><span class=\"s\"> .\/Cargo.lock Cargo.lock<\/span>\r\n\r\n<span class=\"k\">RUN <\/span>cargo build <span class=\"se\">\\\r\n<\/span>  <span class=\"o\">&amp;&amp;<\/span> <span class=\"nb\">rm <\/span>src\/main.rs\r\n\r\n<span class=\"k\">EXPOSE<\/span><span class=\"s\"> 8000<\/span>\r\n<\/code><\/pre>\n<p>CARGO_TARGET_DIR\u3067\u30d3\u30eb\u30c9\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u30d5\u30a1\u30a4\u30eb\u540c\u671f\u3092\u884c\u308f\u306a\u3044\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u6307\u5b9a\u3057\u3066\u3042\u3052\u307e\u3057\u3087\u3046\u3002\u3053\u308c\u3060\u3051\u3067(\u5bfe\u7b56\u524d\u306b\u6bd4\u3079\u308b\u3068)\u304b\u306a\u308a\u30b5\u30af\u30b5\u30af\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\n\u4ed6\u306b\u3082\u3044\u308d\u3044\u308d\u66f8\u3044\u3066\u3044\u307e\u3059\u304c\u3001\u3060\u3044\u305f\u3044\u521d\u56de\u30d3\u30eb\u30c9\u3092\u884c\u3046\u305f\u3081\u306e\u3082\u306e\u3067\u3059\u3002\u521d\u56de\u30d3\u30eb\u30c9\u306f\u4f9d\u5b58\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u5f71\u97ff\u3067\u3069\u3046\u3057\u3066\u3082\u91cd\u304f\u306a\u308b\u306e\u3067\u3001\u5148\u306b\u3084\u3063\u3066\u304a\u3053\u3046\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u306d\u3002<\/p>\n<h2>\u958b\u767a\u4e2d\u306b\u5f15\u3063\u304b\u304b\u3063\u305f\u6587\u6cd5<\/h2>\n<p>TRPL\u3092\u3057\u3063\u304b\u308a\u8aad\u3093\u3067\u3044\u308c\u3070\u5f15\u3063\u304b\u304b\u308b\u3053\u3068\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<h3>\u30b5\u30a4\u30ba\u4e0d\u660e\u306a\u30c8\u30ec\u30a4\u30c8\u306f\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u306b\u683c\u7d0d\u3059\u308b<\/h3>\n<p>TRPL \u306e\u3053\u306e\u30da\u30fc\u30b8\u306b\u66f8\u304b\u308c\u3066\u3044\u308b\u5185\u5bb9\u3067\u3059\u3002<\/p>\n<p>Rust \u3067\u306f\u4e00\u90e8\u306e\u6587\u8108\u306b\u304a\u3044\u3066\u3001\u5bfe\u8c61\u306e\u30b5\u30a4\u30ba\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u7279\u5b9a\u3067\u304d\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n\u5177\u4f53\u7684\u306b\u8a00\u3046\u3068\u3001\u4ee5\u4e0b\u306e\u8a18\u8ff0\u306f\u6012\u3089\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">trait<\/span> <span class=\"n\">Shape<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">area<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">self<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"nb\">f32<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">print_area<\/span><span class=\"p\">(<\/span><span class=\"n\">s<\/span><span class=\"p\">:<\/span> <span class=\"n\">dyn<\/span> <span class=\"n\">Shape<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span> <span class=\"c\">\/\/ `s` doesn't have a size known at compile-time<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">s<\/span><span class=\"nf\">.area<\/span><span class=\"p\">());<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>Shape\u306f\u30c8\u30ec\u30a4\u30c8(Java \u3067\u3044\u3046\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u3088\u3046\u306a\u3082\u306e)\u306a\u306e\u3067\u3001\u5b9a\u7fa9\u3057\u305f\u6bb5\u968e\u3067\u306f\u305d\u306e\u30b5\u30a4\u30ba\u306f\u4e0d\u660e\u3067\u3059\u3002\u5e95\u8fba\u3068\u9ad8\u3055\u3092\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u6301\u3064\u4e09\u89d2\u5f62\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3057\u3001\u534a\u5f84\u306e\u307f\u3092\u6301\u3064\u5186\u5f62\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<br \/>\n\u305d\u306e\u305f\u3081\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u306f\u30b5\u30a4\u30ba\u304c\u5224\u65ad\u3067\u304d\u305a\u3001\u30a8\u30e9\u30fc\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3068\u3044\u3046\u308f\u3051\u3067\u3001Box\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">trait<\/span> <span class=\"n\">Shape<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">area<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">self<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"nb\">f32<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">print_area<\/span><span class=\"p\">(<\/span><span class=\"n\">s<\/span><span class=\"p\">:<\/span> <span class=\"nb\">Box<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">dyn<\/span> <span class=\"n\">Shape<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">s<\/span><span class=\"nf\">.area<\/span><span class=\"p\">());<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>Box \u306b\u683c\u7d0d\u3055\u308c\u305f\u30c7\u30fc\u30bf\u306f\u30d2\u30fc\u30d7\u306b\u914d\u7f6e\u3055\u308c\u307e\u3059\u3002Box \u81ea\u8eab\u306f\u30b7\u30f3\u30d7\u30eb\u306a\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u306a\u306e\u3067\u3001\u683c\u7d0d\u3059\u308b\u30c7\u30fc\u30bf\u306b\u5bc4\u3089\u305a\u3001\u30b5\u30a4\u30ba\u306f\u5e38\u306b\u4e00\u5b9a\u3067\u3059\u3002<br \/>\n\u307e\u305f\u3001Box \u306b\u306fDeref\u30c8\u30ec\u30a4\u30c8\u304c\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u666e\u901a\u306e\u53c2\u7167\u3068\u5909\u308f\u3089\u306a\u3044\u611f\u899a\u3067\u64cd\u4f5c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001\u30b5\u30a4\u30ba\u4e0d\u5b9a\u306a\u30c8\u30ec\u30a4\u30c8\u306f\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u306b\u683c\u7d0d\u3059\u308b\u3053\u3068\u3067\u7591\u4f3c\u7684\u306b\u30b5\u30a4\u30ba\u7279\u5b9a\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\nBox \u4ee5\u5916\u306b\u3082 Rc \u3084 Arc\u7b49\u304c\u3042\u308b\u305f\u3081\u3001\u305d\u3061\u3089\u3082\u30c1\u30a7\u30c3\u30af\u3057\u3066\u304a\u304f\u3068\u3044\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<h3>?\u6f14\u7b97\u5b50<\/h3>\n<p>TRPL \u306e\u3053\u306e\u30da\u30fc\u30b8\u306b\u66f8\u304b\u308c\u3066\u3044\u308b\u5185\u5bb9\u3067\u3059\u3002<\/p>\n<p>Rust \u306b\u306fResult \u578b\u304c\u3042\u308a\u307e\u3059\u3002\u4ed6\u306e\u8a00\u8a9e\u3067\u306f Either \u3068\u304b\u547c\u3070\u308c\u3066\u3044\u308b\u3084\u3064\u3067\u3059\u306d\u3002<br \/>\n\u5931\u6557\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u95a2\u6570\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u304d\u3001\u6b63\u5e38\u306a\u3089\u623b\u308a\u5024\u3092\u683c\u7d0d\u3057\u305fOk\u3092\u3001\u7570\u5e38\u306a\u3089\u30a8\u30e9\u30fc\u306a\u3069\u3092\u683c\u7d0d\u3057\u305fErr\u3092\u8fd4\u5374\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u3042\u3052\u308b\u3001\u7b49\u306e\u4f7f\u3044\u65b9\u3092\u3057\u307e\u3059\u3002<br \/>\n\u547c\u3073\u51fa\u3057\u5074\u306f Ok \u306e\u3068\u304d\u3068 Err \u306e\u3068\u304d\u306e 2 \u901a\u308a\u3092\u60f3\u5b9a\u3057\u3066\u3042\u3052\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u304c\u3042\u308b\u3068\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c\">\/\/ a \/ b<\/span>\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">div<\/span><span class=\"p\">(<\/span><span class=\"n\">a<\/span><span class=\"p\">:<\/span> <span class=\"nb\">f32<\/span><span class=\"p\">,<\/span> <span class=\"n\">b<\/span><span class=\"p\">:<\/span> <span class=\"nb\">f32<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">Result<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">f32<\/span><span class=\"p\">,<\/span> <span class=\"nb\">String<\/span><span class=\"o\">&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">match<\/span> <span class=\"n\">b<\/span> <span class=\"o\">!=<\/span> <span class=\"mf\">0.0<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">true<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nf\">Ok<\/span><span class=\"p\">(<\/span><span class=\"n\">a<\/span> <span class=\"o\">\/<\/span> <span class=\"n\">b<\/span><span class=\"p\">),<\/span>\r\n        <span class=\"k\">false<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nf\">Err<\/span><span class=\"p\">(<\/span><span class=\"nn\">String<\/span><span class=\"p\">::<\/span><span class=\"nf\">from<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Divided by zero.\"<\/span><span class=\"p\">)),<\/span> <span class=\"c\">\/\/ \u30bc\u30ed\u9664\u7b97\u306f\u30a8\u30e9\u30fc<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"c\">\/\/ (a \/ b) + c<\/span>\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">calculate<\/span><span class=\"p\">(<\/span><span class=\"n\">a<\/span><span class=\"p\">:<\/span> <span class=\"nb\">f32<\/span><span class=\"p\">,<\/span> <span class=\"n\">b<\/span><span class=\"p\">:<\/span> <span class=\"nb\">f32<\/span><span class=\"p\">,<\/span> <span class=\"n\">c<\/span><span class=\"p\">:<\/span> <span class=\"nb\">f32<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">Result<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">f32<\/span><span class=\"p\">,<\/span> <span class=\"nb\">String<\/span><span class=\"o\">&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">rd<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">div<\/span><span class=\"p\">(<\/span><span class=\"n\">a<\/span><span class=\"p\">,<\/span> <span class=\"n\">b<\/span><span class=\"p\">);<\/span>\r\n\r\n    <span class=\"k\">match<\/span> <span class=\"n\">rd<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nf\">Ok<\/span><span class=\"p\">(<\/span><span class=\"n\">d<\/span><span class=\"p\">)<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nf\">Ok<\/span><span class=\"p\">(<\/span><span class=\"n\">d<\/span> <span class=\"o\">+<\/span> <span class=\"n\">c<\/span><span class=\"p\">),<\/span>\r\n        <span class=\"nf\">Err<\/span><span class=\"p\">(<\/span><span class=\"n\">e<\/span><span class=\"p\">)<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nf\">Err<\/span><span class=\"p\">(<\/span><span class=\"n\">e<\/span><span class=\"p\">),<\/span> <span class=\"c\">\/\/ \u30bc\u30ed\u9664\u7b97\u306b\u3088\u308b\u30a8\u30e9\u30fc\u306f\u305d\u306e\u307e\u307e\u547c\u3073\u51fa\u3057\u5143\u306b\u6e21\u3059<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>div\u306f\u5931\u6557\u3059\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u95a2\u6570\u3067\u3042\u308b\u305f\u3081\u3001\u7d50\u679c\u306b\u5fdc\u3058\u3066\u51e6\u7406\u3092\u5206\u5c90\u3055\u305b\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n\u5fc5\u8981\u306a\u51e6\u7406\u3067\u306f\u3042\u308a\u307e\u3059\u304c\u3001\u5197\u9577\u306b\u611f\u3058\u307e\u3059\u306d\u3002<\/p>\n<p>\u3053\u3053\u3067?\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u3066\u3042\u3052\u307e\u3057\u3087\u3046\u3002calculate\u306b\u6ce8\u76ee\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c\">\/\/ a \/ b<\/span>\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">div<\/span><span class=\"p\">(<\/span><span class=\"n\">a<\/span><span class=\"p\">:<\/span> <span class=\"nb\">f32<\/span><span class=\"p\">,<\/span> <span class=\"n\">b<\/span><span class=\"p\">:<\/span> <span class=\"nb\">f32<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">Result<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">f32<\/span><span class=\"p\">,<\/span> <span class=\"nb\">String<\/span><span class=\"o\">&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">match<\/span> <span class=\"n\">b<\/span> <span class=\"o\">!=<\/span> <span class=\"mf\">0.0<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">true<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nf\">Ok<\/span><span class=\"p\">(<\/span><span class=\"n\">a<\/span> <span class=\"o\">\/<\/span> <span class=\"n\">b<\/span><span class=\"p\">),<\/span>\r\n        <span class=\"k\">false<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nf\">Err<\/span><span class=\"p\">(<\/span><span class=\"nn\">String<\/span><span class=\"p\">::<\/span><span class=\"nf\">from<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Divided by zero.\"<\/span><span class=\"p\">)),<\/span> <span class=\"c\">\/\/ \u30bc\u30ed\u9664\u7b97\u306f\u30a8\u30e9\u30fc<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"c\">\/\/ (a \/ b) + c<\/span>\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">calculate<\/span><span class=\"p\">(<\/span><span class=\"n\">a<\/span><span class=\"p\">:<\/span> <span class=\"nb\">f32<\/span><span class=\"p\">,<\/span> <span class=\"n\">b<\/span><span class=\"p\">:<\/span> <span class=\"nb\">f32<\/span><span class=\"p\">,<\/span> <span class=\"n\">c<\/span><span class=\"p\">:<\/span> <span class=\"nb\">f32<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">Result<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">f32<\/span><span class=\"p\">,<\/span> <span class=\"nb\">String<\/span><span class=\"o\">&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">d<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">div<\/span><span class=\"p\">(<\/span><span class=\"n\">a<\/span><span class=\"p\">,<\/span> <span class=\"n\">b<\/span><span class=\"p\">)<\/span><span class=\"o\">?<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/ \u30a8\u30e9\u30fc\u306e\u5834\u5408\u306f\u3053\u3053\u3067\u51e6\u7406\u3092\u7d42\u4e86\u3057\u3001\u547c\u3073\u51fa\u3057\u5143\u306b\u6e21\u3059<\/span>\r\n    <span class=\"nf\">Ok<\/span><span class=\"p\">(<\/span><span class=\"n\">d<\/span> <span class=\"o\">+<\/span> <span class=\"n\">c<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4e00\u6c17\u306b\u7c21\u5358\u306b\u306a\u308a\u307e\u3057\u305f\u306d\u3002<br \/>\n?\u6f14\u7b97\u5b50\u306f Result \u578b\u304c\u8fd4\u308a\u5024\u3067\u3042\u308b\u95a2\u6570\u3092\u547c\u3073\u51fa\u3059\u969b\u306b\u4f7f\u3048\u307e\u3059\u3002<br \/>\n\u547c\u3073\u51fa\u3057\u305f\u95a2\u6570\u306e\u623b\u308a\u5024\u304c\u30a8\u30e9\u30fc\u3060\u3063\u305f\u5834\u5408\u3001\u547c\u3073\u51fa\u3057\u5143\u306b\u8fd4\u3057\u3066\u304f\u308c\u307e\u3059\u3002\u6b63\u5e38\u3060\u3063\u305f\u5834\u5408\u306fResult\u578b\u3092\u53d6\u3063\u6255\u3063\u3066\u304f\u308c\u307e\u3059\u3002<br \/>\n\u30a8\u30e9\u30fc\u306e\u3082\u3064\u578b\u3068\u8fd4\u5374\u3059\u3079\u304d\u578b\u304c\u7570\u306a\u308b\u5834\u5408\u306f\u3001from\u30c8\u30ec\u30a4\u30c8\u304c\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306b\u9650\u308a\u81ea\u52d5\u3067\u5909\u63db\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u901a\u308a\u3001\u5931\u6557\u3059\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u95a2\u6570\u3092\u9023\u7d9a\u3057\u3066\u547c\u3073\u51fa\u3059\u3068\u304d\u306b\u306f\u975e\u5e38\u306b\u4fbf\u5229\u3067\u3059\u3002<br \/>\n\u30a8\u30e9\u30fc\u6642\u306b\u5185\u5305\u3059\u308b\u578b\u306fstd::error:Error\u30c8\u30ec\u30a4\u30c8\u3067\u3042\u308b\u5834\u5408\u304c\u591a\u3044\u3067\u3059\u3002<br \/>\n\u30c8\u30ec\u30a4\u30c8\u306e\u307e\u307e\u3067\u306f\u6271\u3044\u306b\u304f\u3044\u306e\u3067 Box \u306b\u683c\u7d0d\u3057\u307e\u3059(Result&lt;Any, Box&gt;)\u3002\u304c\u3001Error -&gt; Box\u306ffrom\u30c8\u30ec\u30a4\u30c8\u304c\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u81ea\u52d5\u3067\u884c\u308f\u308c\u307e\u3059\u3002\u8d85\u4fbf\u5229\u3002<\/p>\n<h2>\u4f7f\u3063\u3066\u307f\u305f\u6240\u611f<\/h2>\n<h3>\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u53b3\u683c<\/h3>\n<p>Rust \u306e\u958b\u767a\u3067\u306f\u3082\u306e\u3059\u3054\u304f\u30b3\u30f3\u30d1\u30a4\u30e9\u306b\u6012\u3089\u308c\u307e\u3059\u3002\u3084\u308c\u6240\u6709\u6a29\u304c\u304a\u304b\u3057\u3044\u3060\u306e\u30b5\u30a4\u30ba\u304c\u308f\u304b\u3089\u3093\u3060\u306edyn\u3064\u3051\u5fd8\u308c\u3066\u308b\u3060\u306e\u2026\u2026<br \/>\n\u4e00\u65b9\u3067\u3001\u5b9f\u884c\u6642\u30a8\u30e9\u30fc\u306f\u3042\u307e\u308a\u8d77\u304d\u307e\u305b\u3093\u3067\u3057\u305f\uff08\u7121\u3044\u308f\u3051\u3067\u306f\u306a\u3044\uff09\u3002<br \/>\n\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u53b3\u683c\u306a\u5206\u3001\u5b9f\u884c\u304c\u30b9\u30e0\u30fc\u30ba\u306b\u3044\u304f\u306e\u306f\u3042\u308a\u304c\u305f\u3044\u3067\u3059\u306d\u3002\u7b46\u8005\u306e\u3088\u3046\u306b\u30b3\u30f3\u30d1\u30a4\u30e9\u3068\u6bb4\u308a\u3042\u3046\u306e\u304c\u697d\u3057\u3044\u30a8\u30f3\u30b8\u30cb\u30a2\u306b\u306f\u5411\u3044\u3066\u3044\u308b\u304b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<h3>\u57fa\u672c\u7684\u306a\u30c4\u30fc\u30eb\u304c\u305d\u308d\u3063\u3066\u3044\u308b<\/h3>\n<p>Option\u578b\u3084Result\u578b\u304c\u57fa\u672c\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u3057\u3066\u5b9f\u88c5\u3055\u308c\u3066\u304a\u308a\u3001\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u6a5f\u80fd\u3082\u5099\u308f\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\n\u307e\u305f\u3001\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u306b\u3064\u3044\u3066\u3082\u8ffd\u52a0\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u7121\u3057\u306b\u5b9f\u884c\u3067\u304d\u308b\u305f\u3081\u3001\u3044\u3061\u3044\u3061\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u9078\u5b9a\u3084\u7ba1\u7406\u306a\u3069\u306b\u982d\u3092\u4f7f\u308f\u305a\u306b\u6e08\u307f\u307e\u3059\u3002<br \/>\n\u5fc5\u8981\u306a\u3082\u306e\u306f\u6700\u521d\u304b\u3089\u5165\u3063\u3066\u3044\u308b\u306e\u304c\u3068\u3066\u3082\u4fbf\u5229\u306b\u611f\u3058\u307e\u3059\u3002<\/p>\n<h3>\u30de\u30af\u30ed\u306f\u3055\u3063\u3071\u308a\u308f\u304b\u3089\u306a\u3044<\/h3>\n<p>Rust \u306b\u306f\u30de\u30af\u30ed\u306e\u6a5f\u80fd\u304c\u3042\u308a\u307e\u3059\u3002\u4eca\u56de\u5229\u7528\u3057\u305factix-web\u3084juniper\u306a\u3069\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3082\u5229\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u306d\u3002<br \/>\n\u3053\u306e\u30de\u30af\u30ed\u3067\u3059\u304c\u3001\u4e2d\u3067\u4f55\u3092\u3084\u3063\u3066\u3044\u308b\u306e\u304b\u975e\u5e38\u306b\u308f\u304b\u308a\u306b\u304f\u304f\u611f\u3058\u307e\u3057\u305f\u3002<\/p>\n<p>\u4f8b\u3048\u3070juniper::graphql_object\u30de\u30af\u30ed\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<details>juniper::graphql_objectmacro_rules! graphql_object {<br \/>\n(<br \/>\n@generate,<br \/>\nmeta = {<br \/>\nlifetimes = [$($lifetimes:tt,)*],<br \/>\nname = $name: ty,<br \/>\nctx = $ctx: ty,<br \/>\nmain_self = $main_self: ident,<br \/>\noutname = {$($outname: tt)*},<br \/>\nscalar = {$($scalar:tt)*},<br \/>\n$(description = $desciption: expr,)*<br \/>\n$(additional = {<br \/>\n$(interfaces = [$($interface:ty,)*],)*<br \/>\n},)*<br \/>\n},<br \/>\nitems = [$({<br \/>\nname = $fn_name: ident,<br \/>\nbody = $body: block,<br \/>\nreturn_ty = $return_ty: ty,<br \/>\nargs = [$({<br \/>\narg_name = $arg_name : ident,<br \/>\narg_ty = $arg_ty: ty,<br \/>\n$(arg_default = $arg_default: expr,)*<br \/>\n$(arg_description = $arg_description: expr,)*<br \/>\n$(arg_docstring = $arg_docstring: expr,)*<br \/>\n},)*],<br \/>\n$(decs = $fn_description: expr,)*<br \/>\n$(docstring = $docstring: expr,)*<br \/>\n$(deprecated = $deprecated: expr,)*<br \/>\n$(executor_var = $executor: ident,)*<br \/>\n},)*],<br \/>\n) =&gt; { &#8230; };<br \/>\n(<br \/>\n@parse_interfaces,<br \/>\nsuccess_callback = $success_callback: ident,<br \/>\nadditional_parser = {$($additional:tt)*},<br \/>\nmeta = {<br \/>\nlifetimes = [$($lifetime:tt,)*],<br \/>\nname = $name:ty,<br \/>\nctx = $ctxt: ty,<br \/>\nmain_self = $mainself: ident,<br \/>\noutname = {$($outname:tt)*},<br \/>\nscalar = {$($scalar:tt)*},<br \/>\n$(description = $desciption: tt,)*<br \/>\n$(additional = {<br \/>\n$(interfaces = [$($_interface:ty,)*],)*<br \/>\n},)*<\/p>\n<p>},<br \/>\nitems = [$({$($items: tt)*},)*],<br \/>\nrest = [$($interface: ty),+] $($rest:tt)*<br \/>\n) =&gt; { &#8230; };<br \/>\n(<br \/>\n@parse_interfaces,<br \/>\nsuccess_callback = $success_callback: ident,<br \/>\nadditional_parser = {$($additional:tt)*},<br \/>\nmeta = { $($meta:tt)* },<br \/>\nitems = [$({$($items: tt)*},)*],<br \/>\nrest = interfaces: $($rest:tt)*<br \/>\n) =&gt; { &#8230; };<br \/>\n(<br \/>\n@parse,<br \/>\nmeta = {$($meta:tt)*},<br \/>\nrest = $($rest:tt)*<br \/>\n) =&gt; { &#8230; };<br \/>\n(@$($stuff:tt)*) =&gt; { &#8230; };<br \/>\n(<br \/>\n$($rest:tt)*<br \/>\n) =&gt; { &#8230; };<br \/>\n}<\/p>\n<p>\u3048\u3063\u3068\u2026\u2026\u4f55\u3053\u306e\u2026\u2026\u306a\u306b\uff1f<\/p>\n<\/details>\n<p>\u7b46\u8005\u306e\u30de\u30af\u30ed\u77e5\u8b58\u304c\u3072\u3088\u3053\u672a\u6e80\u306a\u306e\u304c\u4e3b\u539f\u56e0\u3067\u3059\u304c\u3001\u96e3\u89e3\u3067\u3059\u306d\u3002<br \/>\n\u3068\u306f\u3044\u3048\u3001vec!\u3092\u306f\u3058\u3081\u3068\u3057\u3066\u4e0a\u624b\u304f\u30de\u30af\u30ed\u3092\u4f7f\u3048\u308c\u3070\u4fbf\u5229\u306a\u3053\u3068\u306f\u9593\u9055\u3044\u306a\u3044\u3088\u3046\u3067\u3059\u3002<\/p>\n<h2>\u304a\u308f\u308a\u306b<\/h2>\n<p>Rust \u3092\u89e6\u3063\u305f\u3053\u3068\u3067\u3001\u30dd\u30a4\u30f3\u30bf\u3084\u30b9\u30bf\u30c3\u30af\u30fb\u30d2\u30fc\u30d7\u306b\u3064\u3044\u3066\u610f\u8b58\u3059\u308b\u6a5f\u4f1a\u304c\u3067\u304d\u3001\u52c9\u5f37\u306b\u306a\u308a\u307e\u3057\u305f\u3002<br \/>\n\u307e\u305f\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u3068\u6bb4\u308a\u5408\u3046\u306e\u306f\u697d\u3057\u3044\u3068\u518d\u8a8d\u8b58\u3067\u304d\u307e\u3057\u305f\u3002\u305f\u307e\u306b\u5fc3\u6298\u308c\u308b\u3051\u3069\u3002<\/p>\n<h2>\u53c2\u8003\u8cc7\u6599<\/h2>\n<p>The Rust Programming Language<br \/>\n[Rust] docker \u30b3\u30f3\u30c6\u30ca\u306b\u30de\u30a6\u30f3\u30c8\u3057\u305f\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3067 build \u3059\u308b\u3068\u9045\u304b\u3063\u305f\u8a71\u3057<br \/>\nDX \u3092\u5927\u5e45\u306b\u4f4e\u4e0b\u3055\u305b\u308b Docker for Mac \u3092\u6368\u3066\u3066 Mac \u6700\u901f\u306e Docker \u74b0\u5883\u3092\u624b\u306b\u5165\u308c\u308b<br \/>\nRust \u3067 DI(\u4f9d\u5b58\u6ce8\u5165)\u3059\u308b<br \/>\nRust \u306e\u6240\u6709\u6a29\u307e\u308f\u308a\u306e\u57fa\u790e\u307e\u3068\u3081<br \/>\nRust \u30c1\u30fc\u30c8\u30b7\u30fc\u30c8<br \/>\nRust \u306e\u30a8\u30e9\u30fc\u307e\u308f\u308a\u306e\u5909\u9077<br \/>\nRust \u3067 Option \u5024\u3084 Result \u5024\u3092\u4e0a\u624b\u306b\u6271\u3046<br \/>\nRust \u306e?\u6f14\u7b97\u5b50<br \/>\nRust \u306e Arc \u3092\u8aad\u3080(1): Arc\/Rc \u306e\u57fa\u672c<br \/>\nRust \u306e\u30de\u30af\u30ed\u3092\u899a\u3048\u308b<br \/>\n\u5b9f\u8df5\u30af\u30ea\u30fc\u30f3\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u306f\u3058\u3081\u306b \u666e\u6bb5\u306e\u304a\u4ed5\u4e8b\u3067\u306f JavaJava \u3057\u3066\u308b\u7b46\u8005\u3067\u3059\u3002 Rust \u304c\u65ec\u3089\u3057\u3044\u306e\u3067\u3001\u8a66\u3057\u306b\u7c21\u5358\u306a Gra [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45492","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\" 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