{"id":45748,"date":"2023-12-09T12:34:10","date_gmt":"2023-11-17T10:11:50","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45748-2\/"},"modified":"2024-05-04T12:49:56","modified_gmt":"2024-05-04T04:49:56","slug":"45748-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45748-2\/","title":{"rendered":""},"content":{"rendered":"<p>\u65b0\u3057\u3044\u8a00\u8a9e\u3092\u52c9\u5f37\u3057\u305f\u304b\u3063\u305f\u306e\u3067\u3001Rust\u3092\u59cb\u3081\u3066\u307f\u308b\u3002<\/p>\n<h1>Rust\u3092\u9078\u3093\u3060\u7406\u7531<\/h1>\n<p>\u5019\u88dc\u8a00\u8a9e\u3068\u3057\u3066\u306f\u3001D, Go, Rust\u304c\u3042\u3063\u305f\u3002<br \/>\n\u305d\u306e\u3046\u3061\u3067Rust\u3092\u9078\u3093\u3060\u306e\u306f\u6b21\u306e\u3088\u3046\u306a\u7406\u7531\u304b\u3089\u3060\u3063\u305f\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u6f14\u7b97\u5b50\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u304c\u4f7f\u3044\u305f\u304b\u3063\u305f<\/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\">Go\u306b\u306f\u6f14\u7b97\u5b50\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u304c\u306a\u3044<\/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\">\u30b8\u30a7\u30cd\u30ea\u30af\u30b9(\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8?)\u304c\u6b32\u3057\u304b\u3063\u305f<\/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\">Go\u306b\u306f\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u304c\u306a\u3044\u3089\u3057\u3044<\/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\">\u30ac\u30fc\u30d9\u30c3\u30b8\u30b3\u30ec\u30af\u30bf(GC)\u304c\u6c17\u306b\u5165\u3089\u306a\u3044<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Go\u3082D\u3082GC\u3092\u30aa\u30d5\u306b\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u308b\u3089\u3057\u3044\u304c\u3001\u305f\u3076\u3093\u666e\u901a\u306e\u3053\u3068\u3067\u306f\u306a\u3044\u3060\u308d\u3046<\/ul>\n<p>\u5ff5\u306e\u70ba\u306b\u8a00\u3063\u3066\u304a\u304f\u3068\u3001Go\u3068D\u306b\u306f\u4f55\u306e\u975e\u3082\u306a\u3044\u3002<br \/>\n\u79c1\u304c\u5927\u304d\u306a\u5909\u5316\u306b\u3064\u3044\u3066\u3044\u3051\u306a\u3044\u3060\u3051\u306e\u3053\u3068\u3067\u3042\u308b\u3002<\/p>\n<h1>Rust\u306e\u30ea\u30ea\u30fc\u30b9\u306e\u7a2e\u985e<\/h1>\n<p>Nightly master\u30d6\u30e9\u30f3\u30c1\u306e\u65e5\u3054\u3068\u306e\u6700\u7d42\u6210\u529f\u30d3\u30eb\u30c9\u3001\u65b0\u6a5f\u80fd\u304c\u8ffd\u52a0\u3055\u308c\u308b\u3002<\/p>\n<p>Beta 6\u9031\u3054\u3068\u306bNightly\u304b\u3089\u6607\u683c\u3001Stable\u306b\u5411\u3051\u3066\u30d0\u30b0\u30d5\u30a3\u30c3\u30af\u30b9\u304c\u884c\u308f\u308c\u308b\u3002<\/p>\n<p>Stable 6\u9031\u7d4c\u3063\u305fBeta\u304c\u6607\u683c\u3002<\/p>\n<h1>macOS\u306b\u304a\u3051\u308bRust\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u65b9\u6cd5<\/h1>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>Homebrew\u3092\u4f7f\u3046 (stable\u306e\u307f)<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>brew install rust\u3067\u5165\u308c\u3089\u308c\u308b\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>rustup\u3092\u4f7f\u3046<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>curl https:\/\/sh.rustup.rs -sSf | sh\u3067\u5165\u308c\u3089\u308c\u308b\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>(URL\u304c\u5909\u308f\u3063\u3066\u3044\u308b\u53ef\u80fd\u6027\u3082\u3042\u308b\u306e\u3067www.rustup.rs\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068)<\/ol>\n<h1>Rust\u306e\u66f8\u304d\u65b9<\/h1>\n<h2>Rust\u306e\u8cc7\u6599<\/h2>\n<p>\u4ee5\u4e0b\u5168\u3066\u82f1\u8a9e\u3002\u65e5\u672c\u8a9e\u8a33\u3082\u63a2\u305b\u3070\u3042\u308b\u304b\u3082\u3002<\/p>\n<p>The Rust Programming Language(TRPL)<br \/>\nRust\u306e\u6559\u79d1\u66f8\u3002\u3053\u308c\u3092\u8aad\u3081\u3070\u307e\u3068\u3082\u306a\u30b3\u30fc\u30c9\u304c\u66f8\u3051\u308b\u3002<\/p>\n<p>Rust By Example(RBE)<br \/>\n\u8aac\u660e\u3088\u308a\u30b3\u30fc\u30c9\u3092\u8aad\u3080\u307b\u3046\u304c\u597d\u304d\u306a\u4eba\u306b\u3002TRPL\u306e\u304a\u4f9b\u306b\u3082\u3069\u3046\u305e\u3002<\/p>\n<p>Rust Cookbook<br \/>\n\u5177\u4f53\u7684\u306a\u51e6\u7406\u306e\u66f8\u304d\u65b9\u3092\u5b66\u3073\u305f\u3044\u65b9\u3078\u3002\u3042\u3093\u307e\u308a\u8aad\u3093\u3067\u306a\u3044\u3002<\/p>\n<p>The Rustnomicon<br \/>\nRust\u3092\u5b89\u5168\u6027\u306e\u8edb\u304b\u3089\u89e3\u304d\u653e\u3064unsafe\u306e\u3053\u3068\u3001\u307e\u305f\u30e1\u30e2\u30ea\u30ec\u30a4\u30a2\u30a6\u30c8\u3001FFI\u306e\u66f8\u304d\u65b9\u306a\u3069\u304c\u8f09\u3063\u3066\u3044\u308b\u306f\u305a\u3002\u8aad\u3093\u3067\u306a\u3044\u3002<\/p>\n<p>The Rust Reference<br \/>\nRust\u306e\u4ed5\u69d8\u66f8\u3092\u76ee\u6307\u3057\u3066\u66f8\u304b\u308c\u3066\u3044\u308b\u6587\u66f8\u3002\u8a00\u8a9e\u81ea\u4f53\u304c\u767a\u5c55\u9014\u4e0a\u306a\u306e\u3067\u3069\u3046\u3057\u3066\u3082\u5185\u5bb9\u306f\u53e4\u304f\u306a\u308a\u304c\u3061\u3060\u304c\u5f79\u306b\u7acb\u3064\u3002\u3061\u3087\u3063\u3068\u8aad\u3093\u3060\u3002<\/p>\n<p>Rust Language Cheat Sheet<br \/>\nRust\u306e\u6587\u6cd5\u306e\u30c1\u30fc\u30c8\u30b7\u30fc\u30c8\u3002\u4ed6\u8a00\u8a9e\u306b\u3059\u3067\u306b\u7fd2\u719f\u3057\u3066\u3044\u308b\u4eba\u304cRust\u3092\u5b66\u3076\u306a\u3089\u3053\u3061\u3089\u306b\u5148\u306b\u76ee\u3092\u901a\u3057\u305f\u307b\u3046\u304c\u3044\u3044\u304b\u3082\u3057\u308c\u306a\u3044<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u306f\u57fa\u672c\u7684\u306bTRPL\u306b\u6dfb\u3063\u3066\u3059\u3059\u3081\u308b\u3002<br \/>\n\u305f\u3060\u3057\u3001\u307e\u3068\u3081\u305f\u307b\u3046\u304c\u3044\u3044\u3068\u601d\u3063\u305f\u3082\u306e\u306f\u9069\u5f53\u306b\u518d\u69cb\u6210\u3059\u308b\u3002<\/p>\n<h2>\u30b3\u30e1\u30f3\u30c8<\/h2>\n<pre class=\"post-pre\"><code><span class=\"c\">\/\/ \u884c\u30b3\u30e1\u30f3\u30c8<\/span>\r\n\r\n<span class=\"cm\">\/* \r\n\u30d6\u30ed\u30c3\u30af\u30b3\u30e1\u30f3\u30c8\r\n    \/*\r\n    \u30cd\u30b9\u30c8\u3082\u53ef\r\n    *\/<\/span>\r\n<span class=\"o\">*\/<\/span>\r\n\r\n<span class=\"c\">\/\/\/ \u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u30b3\u30e1\u30f3\u30c8<\/span>\r\n<span class=\"c\">\/\/\/ \u5185\u90e8\u3067Markdown\u304c\u4f7f\u3048\u308b\u3089\u3057\u3044<\/span>\r\n\r\n<span class=\"c\">\/\/! \u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u30b3\u30e1\u30f3\u30c8\u305d\u306e2<\/span>\r\n<span class=\"c\">\/\/! \u3053\u3061\u3089\u306f\u500b\u3005\u306e\u95a2\u6570\u7b49\u3088\u308a\u306f\u3001\u30e2\u30b8\u30e5\u30fc\u30eb\u5168\u4f53\u306e\u8aac\u660e\u306a\u3069\u306b\u4f7f\u3046\u3089\u3057\u3044<\/span>\r\n<\/code><\/pre>\n<h2>\u5909\u6570\u306e\u578b<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30d6\u30fc\u30eb\u578b<\/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\">\u6574\u6570\u578b (u8,u16,u32,u64,i8,i32,i64)<\/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\">\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u578b (f32,f64)<\/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\">\u5b9f\u88c5\u4f9d\u5b58\u306e\u6574\u6570\u578b (usize,isize)<\/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\">(\u5927\u304d\u3055\u306f\u305d\u306e\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306e\u30dd\u30a4\u30f3\u30bf\u578b\u3068\u540c\u3058)<\/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\">32\u30d3\u30c3\u30c8\u6587\u5b57\u578b<\/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\">8\u30d3\u30c3\u30c8\u6587\u5b57\u5217\u578b<\/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\">\u30bf\u30d7\u30eb\u578b<\/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\">\u914d\u5217\u578b\u3068\u30b9\u30e9\u30a4\u30b9\u578b<\/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\">\u69cb\u9020\u4f53\u578b<\/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\">enum\u578b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u95a2\u6570\u30dd\u30a4\u30f3\u30bf\u578b<\/ul>\n<p>\u30ab\u30c3\u30b3\u5185\u306f\u30ea\u30c6\u30e9\u30eb\u306b\u4ed8\u3051\u3089\u308c\u308b\u63a5\u5c3e\u8f9e\u3002<\/p>\n<h2>\u5909\u6570\u5ba3\u8a00<\/h2>\n<p>Rust\u3067\u306f\u3001\u5909\u6570\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u4e0d\u5909(\u5b9a\u6570)\u3067\u3001\u5909\u66f4\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u306b\u306fmut\u3092\u3064\u3051\u308b\u3002<br \/>\n\u73fe\u4ee3\u306e\u8a00\u8a9e\u3089\u3057\u304f\u578b\u63a8\u8ad6\u3082\u3042\u308b\u306e\u3067\u3088\u3044\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>     <span class=\"c\">\/\/ \u5b9a\u6570<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">b<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">3<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/ \u5b9a\u6570\u3067\u306a\u3044<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">c<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/ \u578b\u6307\u5b9a<\/span>\r\n<\/code><\/pre>\n<p>\u5909\u6570\u306e\u5ba3\u8a00\u3068\u521d\u671f\u5316\u306f\u5206\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<br \/>\n\u5206\u3051\u305f\u5834\u5408\u3067\u3082\u578b\u63a8\u8ad6\u306f\u306f\u305f\u3089\u304f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">i<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/ \u5ba3\u8a00<\/span>\r\n<span class=\"n\">i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/ \u521d\u671f\u5316<\/span>\r\n\r\n<span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">j<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/ \u5ba3\u8a00(\u5909\u66f4\u53ef)<\/span>\r\n<span class=\"n\">j<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">3<\/span><span class=\"p\">;<\/span>     <span class=\"c\">\/\/ \u521d\u671f\u5316<\/span>\r\n<span class=\"n\">j<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">7<\/span><span class=\"p\">;<\/span>     <span class=\"c\">\/\/ \u5909\u66f4<\/span>\r\n<\/code><\/pre>\n<p>\u8907\u6570\u306e\u5909\u6570\u30921\u884c\u3067\u521d\u671f\u5316\u3059\u308b\u306b\u306f\u6b21\u306e\u3088\u3046\u306b\u3059\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"p\">(<\/span><span class=\"n\">t<\/span><span class=\"p\">,<\/span><span class=\"n\">u<\/span><span class=\"p\">,<\/span><span class=\"n\">v<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"s\">\"alpha\"<\/span><span class=\"p\">,<\/span><span class=\"s\">\"beta\"<\/span><span class=\"p\">,<\/span><span class=\"s\">\"charlie\"<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ t,u,v\u306f\u5b9a\u6570<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"p\">(<\/span><span class=\"k\">mut<\/span> <span class=\"n\">w<\/span><span class=\"p\">,<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">x<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"s\">\"delta\"<\/span><span class=\"p\">,<\/span><span class=\"s\">\"echo\"<\/span><span class=\"p\">);<\/span>    <span class=\"c\">\/\/ w,x\u306f\u5b9a\u6570\u3067\u306f\u306a\u3044<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"p\">(<\/span><span class=\"n\">y<\/span><span class=\"p\">,<\/span><span class=\"n\">z<\/span><span class=\"p\">):<\/span> <span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"nb\">str<\/span><span class=\"p\">,<\/span><span class=\"o\">&amp;<\/span><span class=\"nb\">str<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"s\">\"foxtrot\"<\/span><span class=\"p\">,<\/span><span class=\"s\">\"golf\"<\/span><span class=\"p\">)<\/span><span class=\"c\">\/\/ \u578b\u6307\u5b9a (thanks to @JunSuzukiJapan)<\/span>\r\n<\/code><\/pre>\n<p>C++\u306b\u306f\u306a\u3044\u6a5f\u80fd\u3068\u3057\u3066\u3001Rust\u3067\u306f\u5909\u6570\u306e\u5ba3\u8a00\u3092\u4e0a\u66f8\u304d\u3067\u304d\u308b\u3002<br \/>\n\u4e0a\u66f8\u304d\u3059\u308b\u306b\u306f\u73fe\u5728\u306e\u578b\u3068\u7570\u306a\u308b\u578b\u3067\u5ba3\u8a00\u3057\u306a\u304a\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">a<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i64<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/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\">a<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ =&gt; \"1\"<\/span>\r\n\r\n<span class=\"k\">let<\/span> <span class=\"n\">a<\/span><span class=\"p\">:<\/span> <span class=\"nb\">f64<\/span> <span class=\"o\">=<\/span> <span class=\"mf\">3.14<\/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\">a<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ =&gt; \"3.14\"<\/span>\r\n<\/code><\/pre>\n<p>TRPL\u306e&#8221;Guessing game&#8221;\u306b\u4f7f\u7528\u4f8b\u304c\u3042\u308b\u3002<\/p>\n<p>\u7279\u6b8a\u306a\u5909\u6570\u3068\u3057\u3066\u3001\u5272\u308a\u5f53\u3066\u3092\u7121\u8996\u3059\u308b\u305f\u3081\u306e_\u304c\u3042\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"mi\">_<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/ \u5272\u308a\u5f53\u3066\u3092\u6368\u3066\u308b<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"mi\">_<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">test<\/span><span class=\"p\">();<\/span> <span class=\"c\">\/\/ \u95a2\u6570\u306e\u623b\u308a\u5024\u3092\u6368\u3066\u308b<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u308c\u306f\u4e3b\u306b\u5f8c\u8ff0\u306edestructuring let\u3001\u30de\u30c3\u30c1\u3084\u30d1\u30bf\u30fc\u30f3\u3068\u4e00\u7dd2\u306b\u4f7f\u3046\u3002<br \/>\n\u307e\u305f\u3001\u623b\u308a\u5024\u3092\u304b\u306a\u3089\u305a\u4f7f\u3046\u3088\u3046\u6307\u5b9a\u3055\u308c\u3066\u3044\u308b(must_use)\u95a2\u6570\u306e\u623b\u308a\u5024\u3092\u6368\u3066\u308b\u305f\u3081\u306b\u4f7f\u308f\u308c\u308b\u3089\u3057\u3044\u3002<\/p>\n<h2>\u5909\u6570\u306e\u5c5e\u6027(const\u3068static)<\/h2>\n<p>Rust\u306b\u3082const\u3068static\u304c\u5b58\u5728\u3059\u308b\u3002<\/p>\n<p>const\u306fC++11\u4ee5\u964d\u306econstexpr\u306e\u3088\u3046\u306a\u3082\u306e\u3002<br \/>\n\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u5b9a\u6570\u3068\u3057\u3066\u6271\u308f\u308c\u3001\u30a4\u30f3\u30e9\u30a4\u30f3\u5316\u3055\u308c\u308b\u305f\u3081\u30e1\u30e2\u30ea\u4e0a\u306e\u30a2\u30c9\u30ec\u30b9\u306f\u4e0d\u5b9a\u3002<\/p>\n<p>static\u306f\u6982\u306dC++\u306e\u3082\u306e\u3068\u4e00\u7dd2\u3002<br \/>\n\u8d77\u52d5\u6642\u306b1\u5ea6\u3060\u3051\u521d\u671f\u5316\u3055\u308c\u3001\u305a\u3063\u3068\u540c\u3058\u30a2\u30c9\u30ec\u30b9\u306b\u3044\u308b\u3002<\/p>\n<p>\u3053\u308c\u30892\u3064\u306f\u5ba3\u8a00\u6642\u306b\u578b\u3092\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<br \/>\n\u307e\u305f\u3001\u3053\u308c\u3089\u306f\u30b0\u30ed\u30fc\u30d0\u30eb\u30b9\u30b3\u30fc\u30d7\u306b\u7f6e\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3002<br \/>\n\u305f\u3060\u3057\u3001\u3053\u308c\u3089\u306f\u5ba3\u8a00\u306e\u4e0a\u66f8\u304d\u3084\u5ba3\u8a00\u3068\u521d\u671f\u5316\u306e\u5206\u96e2\u304c\u3067\u304d\u306a\u3044\u3002<\/p>\n<p>\u547d\u540d\u306b\u95a2\u3057\u3066\u3001const,static\u306a\u5909\u6570\u306b\u306f\u5927\u6587\u5b57\u306e\u5909\u6570\u540d\u3092\u4f7f\u7528\u3059\u308b\u3068\u3044\u3046\u6697\u9ed9\u306e\u4e86\u89e3\u304c\u3042\u308b\u3088\u3046\u3060\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cm\">\/* \u30b0\u30ed\u30fc\u30d0\u30eb\u30b9\u30b3\u30fc\u30d7 *\/<\/span>\r\n<span class=\"k\">const<\/span> <span class=\"n\">C<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i64<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>   <span class=\"c\">\/\/ \u5b9a\u6570<\/span>\r\n<span class=\"k\">static<\/span> <span class=\"n\">S1<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i64<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/ \u5b9a\u6570<\/span>\r\n<span class=\"k\">static<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">S2<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i64<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">3<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/ \u5909\u66f4\u53ef<\/span>\r\n<\/code><\/pre>\n<h2>\u578b\u3078\u306e\u3053\u3060\u308f\u308a<\/h2>\n<p>Rust\u306f\u578b\u306b\u304b\u306a\u308a\u53b3\u3057\u3044\u3002<br \/>\n\u6697\u9ed9\u5909\u63db\u306f\u57fa\u672c\u7684\u306b\u5b58\u5728\u3057\u306a\u3044\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">i<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i64<\/span> <span class=\"o\">=<\/span> <span class=\"mf\">3.5<\/span><span class=\"p\">;<\/span>     <span class=\"c\">\/\/ \u30a8\u30e9\u30fc:\u5ba3\u8a00\u3068\u521d\u671f\u5316\u306e\u578b\u304c\u5408\u308f\u306a\u3044<\/span>\r\n<span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\"<\/span><span class=\"p\">,<\/span><span class=\"mi\">3<\/span><span class=\"o\">\/<\/span><span class=\"mi\">4<\/span>.<span class=\"p\">);<\/span> <span class=\"c\">\/\/ \u30a8\u30e9\u30fc:\u5272\u308a\u7b97\u306e\u30aa\u30da\u30e9\u30f3\u30c9\u306e\u578b\u304c\u4e00\u81f4\u3057\u306a\u3044<\/span>\r\n\r\n<span class=\"k\">let<\/span> <span class=\"n\">j<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">k<\/span><span class=\"p\">:<\/span> <span class=\"nb\">f64<\/span> <span class=\"o\">=<\/span> <span class=\"n\">j<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/ \u30a8\u30e9\u30fc:\u5ba3\u8a00\u3068\u521d\u671f\u5316\u306e\u578b\u304c\u5408\u308f\u306a\u3044<\/span>\r\n<\/code><\/pre>\n<p>\u3082\u3061\u308d\u3093\u30ad\u30e3\u30b9\u30c8\u306f\u3042\u308b(&#8220;one of the most dangerous features of Rust!&#8221;)\u3002<br \/>\n\u305f\u3060\u3057\u3001as\u306fstatic_cast\u76f8\u5f53\u306e\u30ad\u30e3\u30b9\u30c8\u306b\u3057\u304b\u4f7f\u3048\u305a\u3001C\u30e9\u30a4\u30af\u306a\u300c\u4f55\u3067\u3082\u30ad\u30e3\u30b9\u30c8\u300d\u3092\u3059\u308b\u306b\u306f\u5225\u306e\u65b9\u6cd5\u304c\u5fc5\u8981\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">l<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">m<\/span><span class=\"p\">:<\/span> <span class=\"nb\">f64<\/span> <span class=\"o\">=<\/span> <span class=\"n\">j<\/span> <span class=\"k\">as<\/span> <span class=\"nb\">f64<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/ j(\u6574\u6570)\u3092f64\u306b\u30ad\u30e3\u30b9\u30c8<\/span>\r\n<\/code><\/pre>\n<h2>\u95a2\u6570<\/h2>\n<p>\u623b\u308a\u5024\u306e\u578b\u3092\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u306f\u30e6\u30cb\u30c3\u30c8\u578b(\u7a7a\u306e\u30bf\u30d7\u30eb())\u304c\u623b\u308a\u5024\u306b\u306a\u308b\u3002<br \/>\n\u305d\u308c\u4ee5\u5916\u306e\u3082\u306e\u3092\u8fd4\u3057\u305f\u3044\u3068\u304d\u306f\u578b\u6307\u5b9a\u304c\u5fc5\u8981\u3002\u623b\u308a\u5024\u306e\u578b\u63a8\u8ad6\u306f\u306a\u3044\u3002<br \/>\n\u307e\u305f\u3001\u5f15\u6570\u306b\u306f\u578b\u6307\u5b9a\u304c\u5fc5\u8981\u3002<\/p>\n<p>i32\u540c\u58eb\u3092\u8db3\u3057\u7b97\u3059\u308b\u95a2\u6570\u3092\u66f8\u3044\u3066\u307f\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">add<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span><span class=\"p\">,<\/span> <span class=\"n\">y<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"nb\">i32<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">x<\/span> <span class=\"o\">+<\/span> <span class=\"n\">y<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u30bb\u30df\u30b3\u30ed\u30f3\u7121\u3057\u306e\u8868\u73fe\u304creturn\u306e\u5f79\u76ee\u3092\u679c\u305f\u3059\u3002<br \/>\n\u3082\u3061\u308d\u3093C++\u30b9\u30bf\u30a4\u30eb\u3067return\u3092\u66f8\u304f\u3053\u3068\u3082\u3067\u304d\u308b\u3002<\/p>\n<p>\u95a2\u6570\u5185\u95a2\u6570\u3092\u66f8\u304f\u3053\u3068\u3082\u3067\u304d\u308b\u3002<br \/>\n\u307e\u305f\u3001C++\u306e\u30e9\u30e0\u30c0\u5f0f\u306b\u3042\u305f\u308b\u30af\u30ed\u30fc\u30b8\u30e3\u3082\u3042\u308b\u3002<\/p>\n<h2>\u95a2\u6570\u30dd\u30a4\u30f3\u30bf<\/h2>\n<p>\u5148\u306efn add(x: i32, y: i32) -&gt; i32\u306e\u95a2\u6570\u30dd\u30a4\u30f3\u30bf\u306f<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">x<\/span><span class=\"p\">:<\/span> <span class=\"k\">fn<\/span><span class=\"p\">(<\/span><span class=\"nb\">i32<\/span><span class=\"p\">,<\/span><span class=\"nb\">i32<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"nb\">i32<\/span> <span class=\"o\">=<\/span> <span class=\"n\">add<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u3068\u66f8\u3051\u308b\u3002<\/p>\n<h2>\u914d\u5217<\/h2>\n<p>\u5883\u754c\u30c1\u30a7\u30c3\u30af\u304c\u3042\u308a\u3001\u9818\u57df\u5916\u3092\u53c2\u7167\u3059\u308b\u3068\u7570\u5e38\u7d42\u4e86\u3002<br \/>\n\u30a2\u30af\u30bb\u30b9\u306e\u4ed5\u65b9\u306fC++\u3068\u540c\u3058\u3067\u3001\u6dfb\u5b57\u306f0\u30aa\u30ea\u30b8\u30f3\u3002<br \/>\n\u30a2\u30af\u30bb\u30b9\u6642\u306e\u6dfb\u5b57\u306fusize\u578b\u3067\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span><span class=\"mi\">4<\/span><span class=\"p\">,<\/span><span class=\"mi\">5<\/span><span class=\"p\">];<\/span> <span class=\"c\">\/\/ 5\u8981\u7d20\u306e\u914d\u5217<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">b<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">3<\/span><span class=\"p\">;<\/span><span class=\"mi\">5<\/span><span class=\"p\">];<\/span>       <span class=\"c\">\/\/ 5\u8981\u7d20\u306e\u914d\u5217\u3001\u5168\u8981\u7d20\u30923\u3067\u521d\u671f\u5316<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">c<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"nb\">i32<\/span><span class=\"p\">;<\/span><span class=\"mi\">10<\/span><span class=\"p\">];<\/span>      <span class=\"c\">\/\/ 10\u8981\u7d20\u306e\u914d\u5217\u3001\u8981\u7d20\u306e\u578b\u306fi32<\/span>\r\n<\/code><\/pre>\n<p>\u914d\u5217\u306f\u5f8c\u8ff0\u306e\u30b9\u30e9\u30a4\u30b9\u306b\u6697\u9ed9\u5909\u63db\u3067\u304d\u308b\u306e\u3067\u3001\u914d\u5217\u81ea\u4f53\u306f\u5927\u3057\u305f\u6a5f\u80fd\u3092\u6301\u3063\u3066\u3044\u306a\u3044\u3002<\/p>\n<h2>\u30b9\u30e9\u30a4\u30b9<\/h2>\n<p>\u914d\u5217\u306e\u4e00\u90e8\u5206\u306b\u5bfe\u3059\u308b\u53c2\u7167\u3002<br \/>\nC++\u306evalarray\u306b\u3042\u3063\u305f\u6c17\u304c\u3059\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span><span class=\"mi\">4<\/span><span class=\"p\">,<\/span><span class=\"mi\">5<\/span><span class=\"p\">];<\/span> <span class=\"c\">\/\/ \u914d\u5217<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">whole<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">a<\/span><span class=\"p\">[<\/span><span class=\"o\">..<\/span><span class=\"p\">];<\/span>  <span class=\"c\">\/\/ \u914d\u5217\u5168\u4f53\u3078\u306e\u53c2\u7167<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">part<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">a<\/span><span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"o\">..<\/span><span class=\"mi\">4<\/span><span class=\"p\">];<\/span>  <span class=\"c\">\/\/ \u7b2c1~3\u8981\u7d20\u3078\u306e\u53c2\u7167<\/span>\r\n<\/code><\/pre>\n<p>\u30b9\u30e9\u30a4\u30b9a\u306e\u30e1\u30bd\u30c3\u30c9\u306e\u3046\u3061\u3001\u4fbf\u5229\u305d\u3046\u306a\u3082\u306e\u3092\u6319\u3052\u3066\u304a\u304f\u3002<\/p>\n<div>\n<div class=\"post-table\">\u30e1\u30bd\u30c3\u30c9\u540d\u6a5f\u80fd<code>a.contains(x)<\/code><code>a<\/code>\u306b<code>x<\/code>\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3092\u8fd4\u3059<code>a.iter()<\/code><code>a<\/code>\u306e\u30a4\u30c6\u30ec\u30fc\u30bf(C++\u306e<code>const_iterator<\/code>\u306b\u76f8\u5f53)\u3092\u8fd4\u3059\u3002<code>a.iter_mut()<\/code><code>a<\/code>\u306e\u5909\u66f4\u53ef\u80fd\u306a\u30a4\u30c6\u30ec\u30fc\u30bf(C++\u306e<code>iterator<\/code>\u306b\u76f8\u5f53)\u3092\u8fd4\u3059\u3002<code>a.len()<\/code><code>a<\/code>\u306e\u8981\u7d20\u6570\u3092\u8fd4\u3059<code>a.reverse()<\/code><code>a<\/code>\u306e\u8981\u7d20\u306e\u9806\u756a\u3092\u9006\u8ee2\u3055\u305b\u308b<code>a.swap(x,y)<\/code><code>a<\/code>\u306e<code>x<\/code>\u756a\u76ee\u3068<code>y<\/code>\u756a\u76ee\u306e\u8981\u7d20\u3092\u4ea4\u63db\u3059\u308b<code>a.sort()<\/code><code>a<\/code>\u3092\u30bd\u30fc\u30c8\u3002(\u5b89\u5b9a\u3001$O(n\\log n)$)<\/div>\n<\/div>\n<h2>\u30bf\u30d7\u30eb<\/h2>\n<p>C++\u3068\u9055\u3044\u3001Rust\u3067\u306f\u7d44\u307f\u8fbc\u307f\u578b\u3002<br \/>\n\u8981\u7d20\u6570\u3068\u3059\u3079\u3066\u306e\u8981\u7d20\u306e\u578b\u304c\u540c\u3058\u306a\u3089\u4ee3\u5165\u3082\u3067\u304d\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"mi\">2<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ (i32,i32)\u306e\u30bf\u30d7\u30eb<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">b<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"mf\">4.0<\/span><span class=\"p\">,)<\/span> <span class=\"c\">\/\/ (f64)\u306e\u30bf\u30d7\u30eb <\/span>\r\n<\/code><\/pre>\n<p>\u8981\u7d20\u304c1\u500b\u306e\u30bf\u30d7\u30eb\u3092\u4f5c\u308b\u3068\u304d\u306f\u3001\u6700\u5f8c\u306e\u8981\u7d20\u306e\u5f8c\u308d\u306b\u30ab\u30f3\u30de\u304c\u5fc5\u8981\u3002<\/p>\n<p>\u30bf\u30d7\u30eb\u306e\u4e2d\u8eab\u3092\u53d6\u308a\u51fa\u3059\u306b\u306f2\u3064\u306e\u65b9\u6cd5\u304c\u3042\u308b\u3002<\/p>\n<h3>destructuring let<\/h3>\n<p>let\u6587\u3092\u4f7f\u3063\u3066\u65b0\u3057\u3044\u5909\u6570\u306b\u30bf\u30d7\u30eb\u306e\u4e2d\u8eab\u3092\u5272\u308a\u5f53\u3066\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<br \/>\n\u5f53\u7136\u5de6\u8fba\u3068\u53f3\u8fba\u3067\u8981\u7d20\u6570\u304c\u9055\u3063\u305f\u308a\u3059\u308b\u3068\u30a8\u30e9\u30fc\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">t1<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"mi\">2<\/span><span class=\"p\">);<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">t2<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span><span class=\"mi\">4<\/span><span class=\"p\">);<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"p\">(<\/span><span class=\"n\">x<\/span><span class=\"p\">,<\/span><span class=\"n\">y<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"n\">t1<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/ x=1, y=2\u3068\u306a\u308b<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"p\">(<\/span><span class=\"mi\">_<\/span><span class=\"p\">,<\/span><span class=\"n\">z<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"n\">t2<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/ z=4\u3068\u306a\u308b (_\u3067\u8981\u7d20\u3092\u7121\u8996\u3067\u304d\u308b)<\/span>\r\n<\/code><\/pre>\n<h3>\u6dfb\u3048\u5b57\u3067\u30a2\u30af\u30bb\u30b9<\/h3>\n<p>\u6dfb\u3048\u5b57\u3067\u8981\u7d20\u3092\u6307\u5b9a\u3067\u304d\u308b\u3002\u6dfb\u3048\u5b57\u306f0\u30b9\u30bf\u30fc\u30c8\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">t<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"mi\">10<\/span><span class=\"p\">,<\/span><span class=\"mi\">20<\/span><span class=\"p\">,<\/span><span class=\"mi\">30<\/span><span class=\"p\">);<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"n\">t<\/span><span class=\"na\">.0<\/span> <span class=\"c\">\/\/ a=10<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">b<\/span> <span class=\"o\">=<\/span> <span class=\"n\">t<\/span><span class=\"na\">.1<\/span> <span class=\"c\">\/\/ b=20<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">c<\/span> <span class=\"o\">=<\/span> <span class=\"n\">t<\/span><span class=\"na\">.3<\/span> <span class=\"c\">\/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc<\/span>\r\n<\/code><\/pre>\n<p>\u6dfb\u3048\u5b57\u306b\u5909\u6570\u306f\u4f7f\u7528\u3067\u304d\u306a\u3044\u3002out-of-bounds\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u30a8\u30e9\u30fc\u3068\u306a\u308b\u3002<\/p>\n<h2>if<\/h2>\n<p>\u6761\u4ef6\u5f0f\u3092\u56f2\u3046\u30ab\u30c3\u30b3\u304c\u3044\u3089\u306a\u3044\u3002<br \/>\n(TRPL\u304b\u3089\u5f15\u7528)<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">5<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">if<\/span> <span class=\"n\">x<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">5<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"x is five!\"<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>C++\u306eif\u306f\u6587(statement)\u3060\u304c\u3001Rust\u306eif\u306f\u5f0f(expression)\u3067\u3042\u308b\u3002(thanks to @moriturus)<br \/>\n\u5f0f\u306f\u5024\u3092\u8fd4\u3059\u306e\u3067\u3001\u4e09\u9805\u6f14\u7b97\u5b50\u7684\u306a\u4f7f\u3044\u65b9\u3082\u3067\u304d\u308b\u3002<br \/>\n(TRPL\u304b\u3089\u5f15\u7528)<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">5<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">let<\/span> <span class=\"n\">y<\/span> <span class=\"o\">=<\/span> <span class=\"k\">if<\/span> <span class=\"n\">x<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">5<\/span> <span class=\"p\">{<\/span> <span class=\"mi\">10<\/span> <span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span> <span class=\"mi\">15<\/span> <span class=\"p\">};<\/span> <span class=\"c\">\/\/ y = 10 \u3067\u521d\u671f\u5316<\/span>\r\n<\/code><\/pre>\n<h2>\u30eb\u30fc\u30d7<\/h2>\n<p>Rust\u306b\u306f\u7121\u9650\u30eb\u30fc\u30d7\u5c02\u7528\u306e\u69cb\u6587\u304c\u3042\u308b\u3002\u6700\u9069\u5316\u306e\u3057\u3084\u3059\u3055\u3092\u72d9\u3063\u3066\u306e\u3053\u3068\u3089\u3057\u3044\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">loop<\/span><span class=\"p\">{<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"infinity!\"<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ \u7121\u9650\u306e infinity!<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>while\u6587\u3082\u3042\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">5<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">while<\/span> <span class=\"n\">i<\/span> <span class=\"o\">&lt;<\/span> <span class=\"mi\">5<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"loop!\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"n\">i<\/span> <span class=\"o\">-=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>for\u6587\u306f\u3001range-based for\u306e\u3088\u3046\u306a\u73fe\u4ee3\u7684\u306a\u611f\u3058\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">0<\/span><span class=\"p\">,<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span><span class=\"mi\">4<\/span><span class=\"p\">];<\/span>\r\n<span class=\"k\">for<\/span> <span class=\"n\">v<\/span> <span class=\"n\">in<\/span> <span class=\"n\">a<\/span><span class=\"nf\">.iter<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>   <span class=\"c\">\/\/ \u914d\u5217\u306f\u30a4\u30c6\u30ec\u30fc\u30bf\u306b\u5909\u63db\u3057\u3066\u4f7f\u3046<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\"<\/span><span class=\"p\">,<\/span><span class=\"n\">v<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ 0~4\u3092\u9806\u756a\u306b\u51fa\u529b<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6570\u5b57\u3092\u4f7f\u3044\u305f\u3044\u306a\u3089\u3053\u306e\u3088\u3046\u306b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">for<\/span> <span class=\"n\">i<\/span> <span class=\"n\">in<\/span> <span class=\"mi\">0<\/span><span class=\"o\">..<\/span><span class=\"mi\">5<\/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\">i<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ 0~4\u3092\u9806\u756a\u306b\u51fa\u529b<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>break,continue\u306fC++\u306e\u7528\u6cd5\u306b\u52a0\u3048\u3001\u30e9\u30d9\u30eb\u3068\u4f75\u7528\u3057\u3066\u591a\u91cd\u30eb\u30fc\u30d7\u3092\u4e0a\u624b\u306b\u6271\u3048\u308b\u3002<\/p>\n<p>(TRPL\u304b\u3089\u5f15\u7528)<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">'outer<\/span><span class=\"p\">:<\/span> <span class=\"k\">for<\/span> <span class=\"n\">x<\/span> <span class=\"n\">in<\/span> <span class=\"mi\">0<\/span><span class=\"o\">..<\/span><span class=\"mi\">10<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nv\">'inner<\/span><span class=\"p\">:<\/span> <span class=\"k\">for<\/span> <span class=\"n\">y<\/span> <span class=\"n\">in<\/span> <span class=\"mi\">0<\/span><span class=\"o\">..<\/span><span class=\"mi\">10<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"n\">x<\/span> <span class=\"o\">%<\/span> <span class=\"mi\">2<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span> <span class=\"p\">{<\/span> <span class=\"k\">continue<\/span> <span class=\"nv\">'outer<\/span><span class=\"p\">;<\/span> <span class=\"p\">}<\/span> <span class=\"c\">\/\/ continues the loop over x<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"n\">y<\/span> <span class=\"o\">%<\/span> <span class=\"mi\">2<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span> <span class=\"p\">{<\/span> <span class=\"k\">continue<\/span> <span class=\"nv\">'inner<\/span><span class=\"p\">;<\/span> <span class=\"p\">}<\/span> <span class=\"c\">\/\/ continues the loop over y<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"x: {}, y: {}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">x<\/span><span class=\"p\">,<\/span> <span class=\"n\">y<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>(RBE\u304b\u3089\u5f15\u7528)<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">'outer<\/span><span class=\"p\">:<\/span> <span class=\"k\">loop<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Entered the outer loop\"<\/span><span class=\"p\">);<\/span>\r\n\r\n    <span class=\"nv\">'inner<\/span><span class=\"p\">:<\/span> <span class=\"k\">loop<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Entered the inner loop\"<\/span><span class=\"p\">);<\/span>\r\n\r\n        <span class=\"c\">\/\/ This would break only the inner loop<\/span>\r\n        <span class=\"c\">\/\/break;<\/span>\r\n\r\n        <span class=\"c\">\/\/ This breaks the outer loop<\/span>\r\n        <span class=\"k\">break<\/span> <span class=\"nv\">'outer<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"This point will never be reached\"<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Exited the outer loop\"<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<h2>Vec<\/h2>\n<p>C++\u3067\u8a00\u3046vector\u3002<br \/>\n\u7d44\u307f\u8fbc\u307f\u578b\u3067\u3082\u4f55\u3067\u3082\u306a\u3044\u304c\u3001\u4fbf\u5229\u3060\u304b\u3089\u304bTRPL\u3067\u306f\u4ed6\u306e\u8a00\u8a9e\u6a5f\u80fd\u3068\u4e26\u3093\u3067\u7d39\u4ecb\u3055\u308c\u3066\u3044\u308b\u3002<br \/>\n\u914d\u5217\u3068\u540c\u69d8\u306b\u5883\u754c\u30c1\u30a7\u30c3\u30af\u3042\u308a\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">v1<\/span><span class=\"p\">:<\/span> <span class=\"nb\">Vec<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">u64<\/span><span class=\"o\">&gt;<\/span> <span class=\"o\">=<\/span> <span class=\"nd\">vec!<\/span><span class=\"p\">[];<\/span> <span class=\"c\">\/\/ \u7a7a\u306eVec\u751f\u6210<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">v2<\/span> <span class=\"o\">=<\/span> <span class=\"nd\">vec!<\/span><span class=\"p\">[<\/span><span class=\"mi\">0<\/span><span class=\"p\">;<\/span><span class=\"mi\">10<\/span><span class=\"p\">];<\/span>       <span class=\"c\">\/\/ 10\u500b\u306e 0 \u3092\u8981\u7d20\u3068\u3057\u3066\u751f\u6210<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">v3<\/span> <span class=\"o\">=<\/span> <span class=\"nd\">vec!<\/span><span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span><span class=\"mi\">4<\/span><span class=\"p\">,<\/span><span class=\"mi\">5<\/span><span class=\"p\">];<\/span>  <span class=\"c\">\/\/ \u8981\u7d20\u30ea\u30b9\u30c8\u304b\u3089\u751f\u6210<\/span>\r\n\r\n<span class=\"k\">for<\/span> <span class=\"n\">v<\/span> <span class=\"n\">in<\/span> <span class=\"n\">v3<\/span> <span class=\"p\">{<\/span> <span class=\"c\">\/\/for\u6587\u3067\u5168\u8981\u7d20\u3092\u5de1\u56de<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\"<\/span><span class=\"p\">,<\/span><span class=\"n\">v<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ 1~5\u3092\u9806\u306b\u8868\u793a<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u6240\u6709\u6a29<\/h2>\n<p>\u3088\u304f\u308f\u304b\u3089\u306a\u3044\u306e\u3067\u3001TRPL\u3092\u53c2\u8003\u306b\u3059\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">v<\/span> <span class=\"o\">=<\/span> <span class=\"nd\">vec!<\/span><span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"mi\">3<\/span><span class=\"p\">];<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">v2<\/span> <span class=\"o\">=<\/span> <span class=\"n\">v<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"v[0] is: {}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">v<\/span><span class=\"p\">[<\/span><span class=\"mi\">0<\/span><span class=\"p\">]);<\/span> <span class=\"c\">\/\/ \u30a8\u30e9\u30fc: v \u306f\u30e0\u30fc\u30d6\u6e08\u307f<\/span>\r\n<\/code><\/pre>\n<p>Rust\u3067\u306f\u3001\u57fa\u672c\u7684\u306b\u5909\u6570\u306e\u79fb\u52d5\u306f(\u30b3\u30d4\u30fc\u3067\u306a\u304f)\u30e0\u30fc\u30d6\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u3089\u3057\u3044\u3002<br \/>\n\u3053\u308c\u306f\u3001\u300c\u4e00\u3064\u306e\u30ea\u30bd\u30fc\u30b9\u306e\u6240\u6709\u6a29\u306f\u305f\u3060\u4e00\u3064\u306e\u5909\u6570\u306b\u675f\u7e1b\u3055\u308c\u308b\u300d\u3068\u3044\u3046\u539f\u5247\u306b\u3088\u308b\u3082\u306e\u3068\u306e\u3053\u3068\u3002<\/p>\n<p>\u305f\u3060\u3057\u3001\u540c\u3058\u3053\u3068\u3092u64\u578b\u3067\u884c\u3063\u3066\u3082\u3001\u6697\u9ed9\u7684\u306b\u30b3\u30d4\u30fc\u3055\u308c\u308b\u306e\u3067\u554f\u984c\u306f\u8d77\u304d\u306a\u3044\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">x<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u64<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">32<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">x2<\/span> <span class=\"o\">=<\/span> <span class=\"n\">x<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"x is: {}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">x<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ \u554f\u984c\u306a\u3057<\/span>\r\n<\/code><\/pre>\n<p>\u6697\u9ed9\u306e\u30b3\u30d4\u30fc\u304c\u8d77\u3053\u308b\u3088\u3046\u306b\u3059\u308b\u306b\u306f\u3001Copy\u3068\u3044\u3046Trait\u304c\u5fc5\u8981\u3089\u3057\u3044\u3002<br \/>\n\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u306f\u57fa\u672c\u7684\u306b1Copy\u3092\u6301\u3063\u3066\u3044\u308b\u3002<br \/>\nTrait\u306b\u3064\u3044\u3066\u306f\u5f8c\u8ff0\u3002<\/p>\n<h2>(\u4e0d\u5909\u306a)\u53c2\u7167\u3068\u501f\u7528<\/h2>\n<p>\u4e0a\u3067\u8ff0\u3079\u305f\u3088\u3046\u306b\u3001Rust\u3067\u306f\u30e0\u30fc\u30d6\u304c\u57fa\u672c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">print_all<\/span><span class=\"p\">(<\/span><span class=\"n\">v<\/span><span class=\"p\">:<\/span> <span class=\"nb\">Vec<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">u64<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">){<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"n\">val<\/span> <span class=\"n\">in<\/span> <span class=\"n\">v<\/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\">val<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">(){<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">v<\/span> <span class=\"o\">=<\/span> <span class=\"nd\">vec!<\/span><span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span><span class=\"mi\">4<\/span><span class=\"p\">,<\/span><span class=\"mi\">5<\/span><span class=\"p\">];<\/span>\r\n    <span class=\"nf\">print_all<\/span><span class=\"p\">(<\/span><span class=\"n\">v<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ \u554f\u984c\u306a\u3057<\/span>\r\n    <span class=\"nf\">print_all<\/span><span class=\"p\">(<\/span><span class=\"n\">v<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ \u30a8\u30e9\u30fc: v \u306f\u30e0\u30fc\u30d6\u6e08\u307f<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5f15\u6570\u3068\u3057\u3066\u6e21\u3059\u3068\u304d\u3082\u3001\u30e0\u30fc\u30d6\u3067\u6e21\u3055\u308c\u3066\u3057\u307e\u3046\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">v<\/span> <span class=\"o\">=<\/span> <span class=\"nd\">vec!<\/span><span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span><span class=\"mi\">4<\/span><span class=\"p\">,<\/span><span class=\"mi\">5<\/span><span class=\"p\">];<\/span>\r\n<span class=\"k\">for<\/span> <span class=\"n\">val<\/span> <span class=\"n\">in<\/span> <span class=\"n\">v<\/span> <span class=\"p\">{<\/span> <span class=\"c\">\/\/ \u554f\u984c\u306a\u3057<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\"<\/span><span class=\"p\">,<\/span><span class=\"n\">val<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">for<\/span> <span class=\"n\">val<\/span> <span class=\"n\">in<\/span> <span class=\"n\">v<\/span> <span class=\"p\">{<\/span> <span class=\"c\">\/\/ \u30a8\u30e9\u30fc:v\u306f\u30e0\u30fc\u30d6\u6e08\u307f<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\"<\/span><span class=\"p\">,<\/span><span class=\"n\">val<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>for\u6587\u306b\u6e21\u3057\u3066\u3082\u30e0\u30fc\u30d6\u3055\u308c\u308b\u3002<\/p>\n<p>\u7121\u8ad6\u3001\u3053\u306e\u30b7\u30c1\u30e5\u30a8\u30fc\u30b7\u30e7\u30f3\u3092\u5207\u308a\u629c\u3051\u308b\u305f\u3081\u306e\u7b56\u306f\u3042\u308b\u3002<br \/>\nRust\u3067\u306f(\u4e0d\u5909\u306a)\u53c2\u7167\u306f\u3044\u304f\u3064\u4f5c\u3063\u3066\u3082\u826f\u3044\u3053\u3068\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u3067\u3001\u305d\u308c\u3092\u4f7f\u3046\u3002<br \/>\n(\u53b3\u5bc6\u306b\u306f\u3001&amp;T\u304cCopy\u3092\u6301\u3064\u306e\u3067\u5f15\u6570\u3068\u3057\u3066\u6e21\u3055\u308c\u308b\u3068\u304d\u306b\u30b3\u30d4\u30fc\u3055\u308c\u3066\u3044\u308b\u3001\u3064\u307e\u308a\u300c\u53c2\u7167\u3092\u30b3\u30d4\u30fc\u3057\u3066\u6e21\u3059\u300d\u3068\u3044\u3046\u3053\u3068\u3089\u3057\u3044)<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">print_all<\/span><span class=\"p\">(<\/span><span class=\"n\">v<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nb\">Vec<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">u64<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">){<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"n\">val<\/span> <span class=\"n\">in<\/span> <span class=\"n\">v<\/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\">val<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">(){<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">v<\/span> <span class=\"o\">=<\/span> <span class=\"nd\">vec!<\/span><span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span><span class=\"mi\">4<\/span><span class=\"p\">,<\/span><span class=\"mi\">5<\/span><span class=\"p\">];<\/span>\r\n    <span class=\"nf\">print_all<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">v<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ \u554f\u984c\u306a\u3057<\/span>\r\n    <span class=\"nf\">print_all<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">v<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ \u554f\u984c\u306a\u3057<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">v<\/span> <span class=\"o\">=<\/span> <span class=\"nd\">vec!<\/span><span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span><span class=\"mi\">4<\/span><span class=\"p\">,<\/span><span class=\"mi\">5<\/span><span class=\"p\">];<\/span>\r\n<span class=\"k\">for<\/span> <span class=\"n\">val<\/span> <span class=\"n\">in<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">v<\/span> <span class=\"p\">{<\/span> <span class=\"c\">\/\/ \u554f\u984c\u306a\u3057<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\"<\/span><span class=\"p\">,<\/span><span class=\"n\">val<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">for<\/span> <span class=\"n\">val<\/span> <span class=\"n\">in<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">v<\/span> <span class=\"p\">{<\/span> <span class=\"c\">\/\/ \u554f\u984c\u306a\u3057<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\"<\/span><span class=\"p\">,<\/span><span class=\"n\">val<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>Rust\u3067\u306f\u3001\u3053\u306e\u3088\u3046\u306b\u53c2\u7167\u3092\u901a\u3058\u3066\u6240\u6709\u6a29\u3092\u501f\u7528(borrow)\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<h2>\u5909\u66f4\u53ef\u80fd\u306a\u53c2\u7167<\/h2>\n<p>\u4e0d\u5909\u306a\u53c2\u7167\u3060\u3051\u3067\u306f\u4e16\u306e\u4e2d\u3092\u6e21\u308a\u6b69\u3051\u306a\u3044\u3002<br \/>\n\u305d\u3053\u3067\u3001\u5909\u66f4\u53ef\u80fd\u306a\u53c2\u7167&amp;mut\u3092\u4f7f\u3046\u3002<br \/>\n\u5909\u66f4\u53ef\u80fd\u306a\u53c2\u7167\u3092\u901a\u3058\u3066\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u306b\u306f\u3001*\u304c\u5fc5\u8981\u3002<\/p>\n<p>(TRPL\u304b\u3089\u5f15\u7528)<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">5<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">y<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"n\">x<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"o\">*<\/span><span class=\"n\">y<\/span> <span class=\"o\">+=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>\r\n<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\">x<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>\u5909\u66f4\u53ef\u80fd\u306a\u53c2\u7167\u306f\u4e00\u6642\u7684\u306b\u6240\u6709\u6a29\u3092\u79fb\u52d5\u3059\u308b\u306e\u3068\u540c\u7fa9\u3067\u3042\u308b\u3002<br \/>\n\u3057\u305f\u304c\u3063\u3066\u3001\u4e00\u5ea6\u306b\u4e00\u3064\u3057\u304b\u5b58\u5728\u3067\u304d\u306a\u3044\u3002<br \/>\n(\u30e0\u30fc\u30d6\u306f\u3067\u304d\u308b\u304c\u30b3\u30d4\u30fc\u306f\u3067\u304d\u306a\u3044)<br \/>\n\u307e\u305f\u53c2\u7167\u304c\u5b58\u5728\u3059\u308b\u9593\u306f\u5143\u306e\u5909\u6570\u306f\u4f7f\u7528\u3067\u304d\u306a\u3044\u3002<\/p>\n<p>\u4e0a\u306e\u4f8b\u3067\u306f\u3001\u53c2\u7167\u306e\u30b9\u30b3\u30fc\u30d7\u3092\u629c\u3051\u3066\u304b\u3089println\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u3002<br \/>\n\u30b9\u30b3\u30fc\u30d7\u3092\u8868\u3059\u6ce2\u62ec\u5f27\u3092\u53d6\u308a\u9664\u304f\u3068\u3001\u30a8\u30e9\u30fc\u304c\u8d77\u3053\u308b\u3002<\/p>\n<h2>\u751f\u5b58\u671f\u9593(lifetime)<\/h2>\n<p>(\u65e5\u672c\u8a9e\u540d\u306f\u62d9\u8a33)<br \/>\n\u3088\u304f\u308f\u304b\u3089\u306a\u3044\u306e\u3067\u3001TRPL\u3092\u53c2\u8003\u306b\u3059\u308b\u3002<\/p>\n<p>\u6b21\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u8003\u3048\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">r<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"n\">r<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">i<\/span><span class=\"p\">;<\/span>\r\n<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\">r<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>r\u306b\u675f\u7e1b\u3055\u308c\u305f\u53c2\u7167\u304cprintln\u3067\u4f7f\u308f\u308c\u308b\u6642\u306b\u306f\u3001\u3059\u3067\u306b\u5143\u306e\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u3092\u629c\u3051\u3066\u3044\u308b\u306e\u3067\u4f55\u304c\u8d77\u3053\u308b\u304b\u308f\u304b\u3089\u306a\u3044\u3002<br \/>\n(C++\u3067\u540c\u3058\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3068\u672a\u5b9a\u7fa9?)<\/p>\n<p>Rust\u3067\u306f\u3053\u306e\u30b3\u30fc\u30c9\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u3092\u901a\u3089\u306a\u3044\u3002<br \/>\n\u3053\u308c\u3060\u3051\u306a\u3089\u3001\u300c\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u30b9\u30b3\u30fc\u30d7\u30c1\u30a7\u30c3\u30af\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u300d\u3060\u3051\u3067\u3042\u308b\u3002<\/p>\n<p>\u3053\u3053\u304b\u3089\u304c\u3001TRPL\u3092\u3057\u3066\u300cRust\u306e\u6700\u3082\u72ec\u7279\u304b\u3064\u5c0a\u91cd\u3059\u3079\u304d\u6a5f\u80fd\u3067\u3042\u308a\u3001Rust\u3092\u5229\u7528\u3059\u308b\u958b\u767a\u8005\u304c\u719f\u77e5\u3059\u3079\u304d\u3082\u306e\u300d\u3068\u8a00\u308f\u3057\u3081\u308b\u3068\u3053\u308d\u3067\u3042\u308b\u3002<\/p>\n<p>\u6b21\u306e\u30b3\u30fc\u30c9\u3092\u898b\u3066\u307f\u3088\u3046\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">skip_prefix<\/span><span class=\"p\">(<\/span><span class=\"n\">line<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nb\">str<\/span><span class=\"p\">,<\/span> <span class=\"n\">prefix<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nb\">str<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"o\">&amp;<\/span><span class=\"nb\">str<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ ...<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">let<\/span> <span class=\"n\">line<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"lang:en=Hello World!\"<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">lang<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"en\"<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">let<\/span> <span class=\"n\">v<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">p<\/span> <span class=\"o\">=<\/span> <span class=\"nd\">format!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"lang:{}=\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">lang<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"n\">v<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">skip_prefix<\/span><span class=\"p\">(<\/span><span class=\"n\">line<\/span><span class=\"p\">,<\/span> <span class=\"n\">p<\/span><span class=\"nf\">.as_str<\/span><span class=\"p\">());<\/span>\r\n<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\">v<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u306f\u6b21\u306e\u3088\u3046\u306a\u30a8\u30e9\u30fc\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3092\u901a\u3089\u306a\u3044\u3002<\/p>\n<pre class=\"post-pre\"><code>error[E0106]: missing lifetime specifier\r\n --&gt; test.rs:1:45\r\n  |\r\n1 | fn skip_prefix(line: &amp;str, prefix: &amp;str) -&gt; &amp;str {\r\n  |                                             ^ expected lifetime parameter\r\n  |\r\n  = help: this function's return type contains a borrowed value, but the signature does not say whether it is borrowed from `line` or `prefix`\r\n<\/code><\/pre>\n<p>\u53c2\u7167\u3092\u8fd4\u3059\u969b\u306b\u306f&#8221;lifetime parameter&#8221;\u306a\u308b\u3082\u306e\u304c\u5fc5\u8981\u3089\u3057\u3044\u3002<\/p>\n<p>skip_prefix\u3092\u76f4\u3059\u3068\u6b21\u306e\u3088\u3046\u306b\u306a\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"n\">skip_prefix<\/span><span class=\"o\">&lt;<\/span><span class=\"nv\">'a<\/span><span class=\"p\">,<\/span> <span class=\"nv\">'b<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">(<\/span><span class=\"n\">line<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nv\">'a<\/span> <span class=\"nb\">str<\/span><span class=\"p\">,<\/span> <span class=\"n\">prefix<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nv\">'b<\/span> <span class=\"nb\">str<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"o\">&amp;<\/span><span class=\"nv\">'a<\/span> <span class=\"nb\">str<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ ...<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>&#8216;a,&#8217;b\u304c&#8221;lifetime parameter&#8221;(\u751f\u5b58\u671f\u9593\u30d1\u30e9\u30e1\u30fc\u30bf)\u3067\u3042\u308b\u3002<br \/>\n&#8216;a\u304cline\u306e\u3001&#8217;b\u304cprefix\u306e\u751f\u5b58\u671f\u9593\u3092\u8868\u3059\u3002<\/p>\n<p>\u8fd4\u5024\u306e&amp;&#8217;a str\u306f\u3001\u300c\u751f\u5b58\u671f\u9593\u3092line\u3068\u540c\u3058\u306b\u3059\u308b\u300d\u3068\u3044\u3046\u8a2d\u5b9a\u306b\u306a\u3063\u305f\u306e\u3067\u3042\u308b\u3002<br \/>\nline\u306fmain\u95a2\u6570\u5185\u3067\u306f\u751f\u304d\u3064\u3065\u3051\u308b\u306e\u3067\u3001\u8fd4\u5024\u3082\u304a\u306a\u3058\u751f\u5b58\u671f\u9593\u306b\u306a\u3063\u305f\u3053\u3068\u3067println!\u3067\u554f\u984c\u306a\u304f\u4f7f\u7528\u3067\u304d\u308b\u3002<\/p>\n<p>\u7279\u6b8a\u306a\u751f\u5b58\u671f\u9593\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u3001&#8217;static\u304c\u3042\u308b\u3002<br \/>\n\u540d\u524d\u306e\u901a\u308a\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u958b\u59cb\u304b\u3089\u7d42\u4e86\u307e\u3067\u751f\u304d\u7d9a\u3051\u308b\u3002<\/p>\n<p>\u3061\u306a\u307f\u306b\u3001\u3059\u3079\u3066\u306e\u53c2\u7167\u5f15\u6570\u306b\u751f\u5b58\u671f\u9593\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u5fc5\u8981\u306a\u308f\u3051\u3067\u306f\u306a\u3044\u306e\u3067\u3001\u4e0a\u306e\u95a2\u6570\u306f\u6b21\u306e\u3088\u3046\u306b\u3082\u66f8\u3051\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"n\">skip_prefix<\/span><span class=\"o\">&lt;<\/span><span class=\"nv\">'a<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">(<\/span><span class=\"n\">line<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nv\">'a<\/span> <span class=\"nb\">str<\/span><span class=\"p\">,<\/span> <span class=\"n\">prefix<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nb\">str<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"o\">&amp;<\/span><span class=\"nv\">'a<\/span> <span class=\"nb\">str<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ ...<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>(&#8216;b\u306f\u95a2\u6570\u5185\u3067\u4f7f\u7528\u3055\u308c\u3066\u3044\u306a\u3044\u306e\u3067\u7701\u7565\u3067\u304d\u308b)<\/p>\n<h2>\u69cb\u9020\u4f53<\/h2>\n<p>C++\u3068\u3060\u3044\u305f\u3044\u4e00\u7dd2\u3002<br \/>\n\u30e1\u30f3\u30d0\u5ba3\u8a00\u306f\u3001&lt;\u30e1\u30f3\u30d0\u540d&gt;:&lt;\u578b&gt;\u306e\u5f62\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">struct<\/span> <span class=\"n\">Foo<\/span><span class=\"p\">{<\/span>\r\n    <span class=\"n\">m1<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u64<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"n\">m2<\/span><span class=\"p\">:<\/span> <span class=\"nb\">f32<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>C++\u3068\u9055\u3044\u3001const\u3001static\u30e1\u30f3\u30d0\u306f\u4f5c\u308c\u306a\u3044\u3002<br \/>\n(const\u30e1\u30f3\u30d0\u306b\u3064\u3044\u3066\u306f\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u629c\u3051\u7a74\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u308b\u3088\u3046\u3060\u304c)<\/p>\n<p>\u307e\u305f\u3001\u30e1\u30f3\u30d0\u30ec\u30d9\u30eb\u3067\u306e\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u3092\u3059\u308b\u306b\u306f\u3001\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u5207\u308a\u5206\u3051\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n<p>\u53c2\u7167\u3092\u30e1\u30f3\u30d0\u3068\u3057\u3066\u53d6\u308b\u3053\u3068\u3082\u3067\u304d\u308b\u304c\u3001\u305d\u306e\u969b\u306b\u306f\u751f\u5b58\u671f\u9593\u306e\u6307\u5b9a\u304c\u5fc5\u8981\u306b\u306a\u308b\u3002<br \/>\n(\u300c\u69cb\u9020\u4f53\u304c\u53c2\u7167\u3088\u308a\u3082\u9577\u751f\u304d\u3057\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u300d\u3089\u3057\u3044)<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">struct<\/span> <span class=\"n\">Foo<\/span><span class=\"o\">&lt;<\/span><span class=\"nv\">'a<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">{<\/span>\r\n   <span class=\"n\">m<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nv\">'a<\/span> <span class=\"nb\">i32<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u69cb\u9020\u4f53\u306e\u521d\u671f\u5316<\/h2>\n<pre class=\"post-pre\"><code><span class=\"k\">struct<\/span> <span class=\"n\">Foo<\/span><span class=\"p\">{<\/span>\r\n    <span class=\"n\">m1<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"n\">m2<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"n\">m3<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3092\u521d\u671f\u5316\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u3059\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">f<\/span> <span class=\"o\">=<\/span> <span class=\"n\">Foo<\/span><span class=\"p\">{<\/span><span class=\"n\">m1<\/span><span class=\"p\">:<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"n\">m2<\/span><span class=\"p\">:<\/span> <span class=\"mi\">3<\/span><span class=\"p\">,<\/span> <span class=\"n\">m3<\/span><span class=\"p\">:<\/span> <span class=\"mi\">5<\/span><span class=\"p\">};<\/span>\r\n<\/code><\/pre>\n<p>\u69cb\u6587\u3068\u3057\u3066\u306f\u3001&lt;\u69cb\u9020\u4f53\u540d&gt; { &lt;\u30e1\u30f3\u30d0\u540d&gt; : &lt;\u30e1\u30f3\u30d0\u306e\u5024&gt;, &#8230; }\u3068\u306a\u308b\u3002<br \/>\n\u3053\u306e\u3068\u304d\u3001\u30e1\u30f3\u30d0\u306e\u9806\u756a\u306f\u3069\u3046\u3067\u3082\u3088\u3044\u304c\u3001\u5fc5\u305a\u3059\u3079\u3066\u306e\u30e1\u30f3\u30d0\u3092\u521d\u671f\u5316\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<\/p>\n<p>\u307e\u305f\u3001\u65e2\u5b58\u306e\u69cb\u9020\u4f53\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u5024\u3092\u4e00\u90e8\u3060\u3051\u5909\u66f4\u3057\u3066\u30b3\u30d4\u30fc\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">f1<\/span> <span class=\"o\">=<\/span> <span class=\"n\">Foo<\/span><span class=\"p\">{<\/span><span class=\"n\">m1<\/span><span class=\"p\">:<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"n\">m2<\/span><span class=\"p\">:<\/span> <span class=\"mi\">3<\/span><span class=\"p\">,<\/span> <span class=\"n\">m3<\/span><span class=\"p\">:<\/span> <span class=\"mi\">5<\/span><span class=\"p\">};<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">f2<\/span> <span class=\"o\">=<\/span> <span class=\"n\">Foo<\/span><span class=\"p\">{<\/span><span class=\"n\">m1<\/span><span class=\"p\">:<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"n\">m3<\/span><span class=\"p\">:<\/span> <span class=\"mi\">7<\/span><span class=\"p\">,<\/span> <span class=\"o\">..<\/span> <span class=\"n\">f1<\/span><span class=\"p\">};<\/span> <span class=\"c\">\/\/ m1: 0, m2: 3, m3: 7<\/span>\r\n<\/code><\/pre>\n<h2>\u30bf\u30d7\u30eb\u69cb\u9020\u4f53<\/h2>\n<p>Rust\u3067\u306f\u30bf\u30d7\u30eb\u306b\u540d\u524d\u3092\u3064\u3051\u3066\u65b0\u305f\u306a\u578b\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">struct<\/span> <span class=\"nf\">A<\/span><span class=\"p\">(<\/span><span class=\"nb\">u64<\/span><span class=\"p\">);<\/span>\r\n<span class=\"k\">struct<\/span> <span class=\"nf\">B<\/span><span class=\"p\">(<\/span><span class=\"nb\">u64<\/span><span class=\"p\">);<\/span>\r\n\r\n<span class=\"k\">let<\/span> <span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">A<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">);<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">b<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">B<\/span><span class=\"p\">(<\/span><span class=\"mi\">2<\/span><span class=\"p\">);<\/span>\r\n<span class=\"c\">\/\/ b = a \u306f\u4e0d\u53ef\u80fd(A\u3068B\u306f\u9055\u3046\u578b)<\/span>\r\n<\/code><\/pre>\n<p>\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u304d\u306f\u3001\u666e\u901a\u306e\u30bf\u30d7\u30eb\u540c\u69d8\u306b\u6dfb\u3048\u5b57\u30a2\u30af\u30bb\u30b9\u304c\u3067\u304d\u308b\u3002<br \/>\n\u307e\u305f\u3001destructuring let\u3082\u3059\u3053\u3057\u66f8\u304d\u65b9\u304c\u9055\u3046\u304c\u53ef\u80fd\u3067\u3042\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">struct<\/span> <span class=\"nf\">Test<\/span><span class=\"p\">(<\/span><span class=\"nb\">u64<\/span><span class=\"p\">,<\/span><span class=\"nb\">u64<\/span><span class=\"p\">,<\/span><span class=\"nb\">u64<\/span><span class=\"p\">);<\/span>\r\n\r\n<span class=\"k\">let<\/span> <span class=\"n\">t<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">Test<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span><span class=\"mi\">3<\/span><span class=\"p\">);<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"nf\">Test<\/span><span class=\"p\">(<\/span><span class=\"mi\">_<\/span><span class=\"p\">,<\/span><span class=\"n\">i<\/span><span class=\"p\">,<\/span><span class=\"n\">j<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"n\">t<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/ i=2, j=3<\/span>\r\n<\/code><\/pre>\n<h2>\u7a7a\u306e\u69cb\u9020\u4f53 (Unit-like struct)<\/h2>\n<p>Rust\u3067\u3082\u8981\u7d20\u306e\u306a\u3044\u69cb\u9020\u4f53\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">struct<\/span> <span class=\"n\">Empty1<\/span><span class=\"p\">{}<\/span>  <span class=\"c\">\/\/\u8981\u7d20\u306e\u306a\u3044\u901a\u5e38\u306e\u69cb\u9020\u4f53<\/span>\r\n<span class=\"k\">struct<\/span> <span class=\"n\">Empty2<\/span><span class=\"p\">;<\/span>   <span class=\"c\">\/\/\u8981\u7d20\u306e\u306a\u3044\u69cb\u9020\u4f53(\u7279\u5225\u306a\u8a18\u6cd5)<\/span>\r\n<span class=\"k\">struct<\/span> <span class=\"nf\">Empty3<\/span><span class=\"p\">();<\/span> <span class=\"c\">\/\/\u8981\u7d20\u306e\u306a\u3044\u30bf\u30d7\u30eb\u69cb\u9020\u4f53<\/span>\r\n\r\n<span class=\"cm\">\/* \u751f\u6210\u65b9\u6cd5 *\/<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">e1<\/span> <span class=\"o\">=<\/span> <span class=\"n\">Empty1<\/span><span class=\"p\">{};<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">e2<\/span> <span class=\"o\">=<\/span> <span class=\"n\">Empty2<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">e3<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">Empty3<\/span><span class=\"p\">();<\/span>\r\n<\/code><\/pre>\n<h2>\u5217\u6319\u578b(enum)<\/h2>\n<p>C++\u306eenum\u3068\u306f\u9055\u3063\u3066\u3001\u6574\u6570\u578b\u4ee5\u5916\u306e\u578b\u3082\u6271\u3048\u308b\u3002<br \/>\n\u3082\u3063\u3068\u8a00\u3048\u3070\u3001\u5404\u8981\u7d20\u304c\u7570\u306a\u308b\u578b\u3067\u3042\u3063\u3066\u3082\u826f\u3044\u3002<br \/>\n\u3044\u308f\u3086\u308b\u30bf\u30b0\u4ed8\u304d\u5171\u7528\u4f53\u306e\u3088\u3046\u306a\u3082\u306e\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">enum<\/span> <span class=\"n\">Test<\/span><span class=\"p\">{<\/span>\r\n  <span class=\"n\">A<\/span><span class=\"p\">,<\/span>       <span class=\"c\">\/\/ \u7a7a\u306e\u69cb\u9020\u4f53<\/span>\r\n  <span class=\"nf\">B<\/span><span class=\"p\">(<\/span><span class=\"nb\">i32<\/span><span class=\"p\">),<\/span>  <span class=\"c\">\/\/ (i32)\u306e\u30bf\u30d7\u30eb<\/span>\r\n  <span class=\"n\">C<\/span><span class=\"p\">{<\/span><span class=\"n\">x<\/span><span class=\"p\">:<\/span> <span class=\"nb\">f64<\/span><span class=\"p\">}<\/span> <span class=\"c\">\/\/ \u69cb\u9020\u4f53<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">let<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">Test<\/span><span class=\"p\">::<\/span><span class=\"n\">A<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">y<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">Test<\/span><span class=\"p\">::<\/span><span class=\"nf\">B<\/span><span class=\"p\">(<\/span><span class=\"mi\">16<\/span><span class=\"p\">);<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">z<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">Test<\/span><span class=\"p\">::<\/span><span class=\"n\">C<\/span><span class=\"p\">{<\/span><span class=\"n\">x<\/span><span class=\"p\">:<\/span> <span class=\"mf\">3.14<\/span><span class=\"p\">};<\/span>\r\n<\/code><\/pre>\n<h2>\u69cb\u9020\u4f53\u306a\u3069\u306e\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u88c5<\/h2>\n<p>\u69cb\u9020\u4f53Foo\u3092\u6b21\u306e\u3088\u3046\u306b\u5b9a\u7fa9\u3059\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">struct<\/span> <span class=\"n\">Foo<\/span><span class=\"p\">{<\/span>\r\n    <span class=\"n\">m<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u69cb\u9020\u4f53Foo\u306b\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u88c5\u3059\u308b\u306b\u306f\u3001impl\u30d6\u30ed\u30c3\u30af\u3092\u4f7f\u3046\u3002<br \/>\nC++\u306econst\u3084static\u306b\u3042\u305f\u308b\u30e1\u30bd\u30c3\u30c9\u3082\u5b9f\u88c5\u3067\u304d\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">impl<\/span> <span class=\"n\">Foo<\/span><span class=\"p\">{<\/span>\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">answer<\/span><span class=\"p\">()<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"nb\">i32<\/span> <span class=\"p\">{<\/span> <span class=\"c\">\/\/ static\u30e1\u30bd\u30c3\u30c9<\/span>\r\n        <span class=\"mi\">42<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">get_m<\/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\">i32<\/span> <span class=\"p\">{<\/span> <span class=\"c\">\/\/ const\u30e1\u30bd\u30c3\u30c9<\/span>\r\n        <span class=\"k\">self<\/span><span class=\"py\">.m<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">set_m<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">,<\/span> <span class=\"n\">m_new<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span><span class=\"p\">){<\/span> <span class=\"c\">\/\/ \u30e1\u30f3\u30d0\u3092\u5909\u66f4\u3059\u308b\u30e1\u30bd\u30c3\u30c9<\/span>\r\n        <span class=\"k\">self<\/span><span class=\"py\">.m<\/span> <span class=\"o\">=<\/span> <span class=\"n\">m_new<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>C++\u3068\u306e\u9055\u3044\u3068\u3057\u3066\u3001static\u3067\u306a\u3044\u30e1\u30bd\u30c3\u30c9\u306f\u5f15\u6570\u3067self(\u3042\u308b\u3044\u306f\u305d\u306e\u53c2\u7167)\u3092\u53d6\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<br \/>\nself\u3082\u5f15\u6570\u3067\u3057\u304b\u7121\u3044\u306e\u3067\u3001\u30e1\u30f3\u30d0\u3092\u5229\u7528\u3059\u308b\u969b\u306b\u306fself.\u3067\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3057\u3001self\u3092\u53c2\u7167\u3067\u53d6\u3089\u306a\u3044\u3068\u30e0\u30fc\u30d6\u3055\u308c\u3066\u3057\u307e\u3044\u3084\u3084\u3053\u3057\u3044\u3053\u3068\u306b\u306a\u308b\u3002<br \/>\n(\u300c\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u306a\u3089\u3053\u306e\u69cb\u9020\u4f53\u306e\u5f79\u76ee\u306f\u7d42\u308f\u308a\u300d\u3068\u3044\u3046\u3053\u3068\u3067\u3042\u3048\u3066\u30e0\u30fc\u30d6\u3057\u3066\u3057\u307e\u3046\u3053\u3068\u3082\u3042\u308b\u3088\u3046\u3060\u304c)<\/p>\n<p>\u751f\u5b58\u671f\u9593\u4ed8\u304d\u306e\u69cb\u9020\u4f53\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u304d\u306f\u3001impl\u30d6\u30ed\u30c3\u30af\u306b\u3082\u751f\u5b58\u671f\u9593\u3092\u66f8\u304b\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">impl<\/span><span class=\"o\">&lt;<\/span><span class=\"nv\">'a<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">Foo<\/span><span class=\"o\">&lt;<\/span><span class=\"nv\">'a<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ ...<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u306a\u304a\u3001\u30bf\u30d7\u30eb\u69cb\u9020\u4f53\u3084\u5217\u6319\u578b\u306b\u3064\u3044\u3066\u3082\u540c\u69d8\u306b\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3067\u304d\u308b\u3002<\/p>\n<h2>\u30de\u30c3\u30c1<\/h2>\n<h3>\u30de\u30c3\u30c1\u306e\u57fa\u672c<\/h3>\n<p>match\u306fC++\u306eswitch\u306e\u3088\u3046\u306a\u3082\u306e\u3002<\/p>\n<p>(TRPL\u304b\u3089\u5f15\u7528)<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">match<\/span> <span class=\"n\">x<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"mi\">1<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"one\"<\/span><span class=\"p\">),<\/span>\r\n    <span class=\"mi\">2<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"two\"<\/span><span class=\"p\">),<\/span>\r\n    <span class=\"mi\">3<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"three\"<\/span><span class=\"p\">),<\/span>\r\n    <span class=\"mi\">_<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"anything\"<\/span><span class=\"p\">),<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u307e\u305f\u3001enum\u306b\u30de\u30c3\u30c1\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u308b\u3002<br \/>\n(\u3064\u3044\u3067\u306b\u4fbf\u5229\u306a\u66f8\u304d\u65b9\u3082\u7d39\u4ecb)<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">enum<\/span> <span class=\"n\">Test<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">A<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"n\">B<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"n\">C<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"n\">D<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">};<\/span>\r\n\r\n<span class=\"k\">let<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">Test<\/span><span class=\"p\">::<\/span><span class=\"n\">A<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">match<\/span> <span class=\"n\">x<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nn\">Test<\/span><span class=\"p\">::<\/span><span class=\"n\">A<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"A\"<\/span><span class=\"p\">),<\/span>\r\n    <span class=\"nn\">Test<\/span><span class=\"p\">::<\/span><span class=\"n\">B<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"B\"<\/span><span class=\"p\">),<\/span>\r\n    <span class=\"nn\">Test<\/span><span class=\"p\">::<\/span><span class=\"n\">C<\/span> <span class=\"p\">|<\/span> <span class=\"nn\">Test<\/span><span class=\"p\">::<\/span><span class=\"n\">D<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"C or D\"<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ \u8907\u6570\u306e\u72b6\u6cc1\u306b\u30de\u30c3\u30c1\u3067\u304d\u308b<\/span>\r\n    <span class=\"mi\">_<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"p\">{},<\/span> <span class=\"c\">\/\/ \u4f55\u3082\u3057\u306a\u3044<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>_\u306fC++\u3067\u8a00\u3046default\u306e\u5f79\u5272\u3092\u679c\u305f\u3057\u3066\u3044\u308b\u3002<br \/>\n(\u6839\u5e95\u306b\u306f\u3082\u3046\u5c11\u3057\u3084\u3084\u3053\u3057\u3044\u4ed5\u7d44\u307f\u304c\u3042\u308b\u3001\u5f8c\u8ff0)<\/p>\n<p>Rust\u306ematch\u306f\u3001\u5bfe\u8c61\u3068\u306a\u308b\u5909\u6570\u304c(\u578b\u3068\u3057\u3066)\u53d6\u308a\u3046\u308b\u5024\u5168\u3066\u306b\u3064\u3044\u3066\u51e6\u7406\u3092\u66f8\u304b\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u3002<br \/>\n\u7279\u5b9a\u306e\u5024\u306b\u3064\u3044\u3066\u306e\u307f\u51e6\u7406\u3092\u66f8\u304d\u305f\u3044\u306a\u3089\u3001\u6b8b\u308a\u306f_\u3067\u51e6\u7406\u3059\u308c\u3070\u826f\u3044\u3002<\/p>\n<h3>\u30de\u30c3\u30c1\u306f\u300c\u5f0f\u300d<\/h3>\n<p>if\u304c\u5f0f\u3067\u3042\u3063\u305f\u3088\u3046\u306b\u3001match\u3082\u5f0f\u306a\u306e\u3067\u5024\u3092\u8fd4\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3002<br \/>\nif\u306e\u7bc0\u3067\u66f8\u3044\u305f\u5f0f\u3068\u540c\u3058\u3082\u306e\u3092match\u3067\u66f8\u3044\u3066\u307f\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">5<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">let<\/span> <span class=\"n\">y<\/span> <span class=\"o\">=<\/span> <span class=\"k\">match<\/span> <span class=\"n\">x<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"mi\">5<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"mi\">10<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"mi\">_<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"mi\">15<\/span>\r\n<span class=\"p\">}<\/span> <span class=\"c\">\/\/ y = 10 \u3067\u521d\u671f\u5316<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u306e\u4f8b\u3060\u3068if\u5f0f\u3067\u66f8\u3044\u305f\u65b9\u304c\u307e\u3057\u3060\u304c\u3001\u5f8c\u3005enum\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u7b49\u3067\u672c\u9818\u304c\u767a\u63ee\u3055\u308c\u308b\u3002<\/p>\n<h3>Destructuring<\/h3>\n<p>match\u5f0f\u306e\u4e2d\u3067\u3082destructuring let\u306e\u3088\u3046\u306bstruct\u3084tuple\u306e\u4e2d\u8eab\u3092\u53d6\u308a\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">struct<\/span> <span class=\"n\">Point<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">x<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"n\">y<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">let<\/span> <span class=\"n\">origin<\/span> <span class=\"o\">=<\/span> <span class=\"n\">Point<\/span> <span class=\"p\">{<\/span> <span class=\"n\">x<\/span><span class=\"p\">:<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"n\">y<\/span><span class=\"p\">:<\/span> <span class=\"mi\">0<\/span> <span class=\"p\">};<\/span>\r\n\r\n<span class=\"k\">match<\/span> <span class=\"n\">origin<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">Point<\/span> <span class=\"p\">{<\/span> <span class=\"n\">x<\/span><span class=\"p\">,<\/span> <span class=\"n\">y<\/span> <span class=\"p\">}<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"({},{})\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">x<\/span><span class=\"p\">,<\/span> <span class=\"n\">y<\/span><span class=\"p\">),<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u30ac\u30fc\u30c9<\/h3>\n<h1>\u307e\u3060\u8a18\u4e8b\u306b\u66f8\u3044\u3066\u306a\u3044C++\u3068\u306e\u9055\u3044<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u95a2\u6570\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u304c\u306a\u3044(\u6f14\u7b97\u5b50\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306f\u3067\u304d\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\">\u30c7\u30d5\u30a9\u30eb\u30c8\u5f15\u6570\u304c\u306a\u3044<\/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\">\u69cb\u9020\u4f53\u540c\u58eb\u306e\u7d99\u627f\u306f\u3067\u304d\u306a\u3044(Trait\u540c\u58eb\u306e\u7d99\u627f\u306f\u3067\u304d\u308b)<\/ul>\n<\/li>\n<\/ul>\n<p>constexpr\u95a2\u6570\u304c\u5f31\u3044<\/p>\n<h1>\u307e\u3060\u307e\u3060\u3042\u308b\u3051\u3069<\/h1>\n<p>\u7d9a\u304d\u306f\u968f\u6642\u8ffd\u8a18\u3057\u3066\u3044\u304d\u307e\u3059<\/p>\n<h1>\u6700\u5f8c\u306b<\/h1>\n<p>Rust\u30e6\u30fc\u30b6\u30fc\u306e\u65b9\u306e\u30c4\u30c3\u30b3\u30df\u304a\u5f85\u3061\u3057\u3066\u304a\u308a\u307e\u3059\u3002<\/p>\n<div>\n<p>\u914d\u5217\u3001\u30b9\u30e9\u30a4\u30b9\u306fCopy\u3092\u6301\u305f\u305a\u3001\u30bf\u30d7\u30eb\u306f\u5168\u8981\u7d20\u304cCopy\u3092\u6301\u3064\u578b\u3067\u3042\u308b\u3068\u304d\u306e\u307f\u30bf\u30d7\u30eb\u81ea\u8eab\u304cCopy\u3092\u6301\u3064\u00a0\u21a9<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u65b0\u3057\u3044\u8a00\u8a9e\u3092\u52c9\u5f37\u3057\u305f\u304b\u3063\u305f\u306e\u3067\u3001Rust\u3092\u59cb\u3081\u3066\u307f\u308b\u3002 Rust\u3092\u9078\u3093\u3060\u7406\u7531 \u5019\u88dc\u8a00\u8a9e\u3068\u3057\u3066\u306f\u3001D, Go,  [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45748","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\/45748-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u65b0\u3057\u3044\u8a00\u8a9e\u3092\u52c9\u5f37\u3057\u305f\u304b\u3063\u305f\u306e\u3067\u3001Rust\u3092\u59cb\u3081\u3066\u307f\u308b\u3002 Rust\u3092\u9078\u3093\u3060\u7406\u7531 \u5019\u88dc\u8a00\u8a9e\u3068\u3057\u3066\u306f\u3001D, Go, [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45748-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-11-17T10:11:50+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-04T04:49:56+00:00\" \/>\n<meta name=\"author\" content=\"\u79d1, \u9896\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u79d1, \u9896\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/45748-2\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/45748-2\/\",\"name\":\"- Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\"},\"datePublished\":\"2023-11-17T10:11:50+00:00\",\"dateModified\":\"2024-05-04T04:49:56+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/8ca01ba7f7362ad4edb7da206a12f29e\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/zh\/blog\/45748-2\/\"]}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/\",\"name\":\"Blog - Silicon Cloud\",\"description\":\"\",\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/8ca01ba7f7362ad4edb7da206a12f29e\",\"name\":\"\u79d1, \u9896\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/8a6fb3cc7ba2f69d2189ba532aec4633ea7ed75ac0af162ec367cb3abc0fb2af?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/8a6fb3cc7ba2f69d2189ba532aec4633ea7ed75ac0af162ec367cb3abc0fb2af?s=96&d=mm&r=g\",\"caption\":\"\u79d1, \u9896\"},\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/author\/keying\/\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/45748-2\/#local-main-organization-logo\",\"url\":\"\",\"contentUrl\":\"\",\"caption\":\"Blog - Silicon Cloud\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"- Blog - Silicon Cloud","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/zh\/blog\/45748-2\/","og_locale":"zh_CN","og_type":"article","og_description":"\u65b0\u3057\u3044\u8a00\u8a9e\u3092\u52c9\u5f37\u3057\u305f\u304b\u3063\u305f\u306e\u3067\u3001Rust\u3092\u59cb\u3081\u3066\u307f\u308b\u3002 Rust\u3092\u9078\u3093\u3060\u7406\u7531 \u5019\u88dc\u8a00\u8a9e\u3068\u3057\u3066\u306f\u3001D, Go, [&hellip;]","og_url":"https:\/\/www.silicloud.com\/zh\/blog\/45748-2\/","og_site_name":"Blog - Silicon Cloud","article_published_time":"2023-11-17T10:11:50+00:00","article_modified_time":"2024-05-04T04:49:56+00:00","author":"\u79d1, \u9896","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"\u79d1, \u9896","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"6 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/zh\/blog\/45748-2\/","url":"https:\/\/www.silicloud.com\/zh\/blog\/45748-2\/","name":"- Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website"},"datePublished":"2023-11-17T10:11:50+00:00","dateModified":"2024-05-04T04:49:56+00:00","author":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/8ca01ba7f7362ad4edb7da206a12f29e"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/zh\/blog\/45748-2\/"]}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website","url":"https:\/\/www.silicloud.com\/zh\/blog\/","name":"Blog - Silicon Cloud","description":"","inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/8ca01ba7f7362ad4edb7da206a12f29e","name":"\u79d1, \u9896","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/8a6fb3cc7ba2f69d2189ba532aec4633ea7ed75ac0af162ec367cb3abc0fb2af?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/8a6fb3cc7ba2f69d2189ba532aec4633ea7ed75ac0af162ec367cb3abc0fb2af?s=96&d=mm&r=g","caption":"\u79d1, \u9896"},"url":"https:\/\/www.silicloud.com\/zh\/blog\/author\/keying\/"},{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/45748-2\/#local-main-organization-logo","url":"","contentUrl":"","caption":"Blog - Silicon Cloud"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/45748","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/comments?post=45748"}],"version-history":[{"count":2,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/45748\/revisions"}],"predecessor-version":[{"id":98418,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/45748\/revisions\/98418"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/media?parent=45748"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/categories?post=45748"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/tags?post=45748"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}