{"id":45356,"date":"2023-11-14T01:59:18","date_gmt":"2022-12-24T13:53:57","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45356-2\/"},"modified":"2024-05-04T08:54:36","modified_gmt":"2024-05-04T00:54:36","slug":"45356-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45356-2\/","title":{"rendered":""},"content":{"rendered":"<p>\u3075\u3068\u601d\u3044\u7acb\u3063\u3066 Rust \u3068\u3044\u3046\u8a00\u8a9e\u3067\u3042\u308b\u81ea\u5206\u7528\u306e\u30c4\u30fc\u30eb\u3092\u66f8\u3044\u305f\u3002\u5927\u5909\u6c17\u306b\u5165\u3063\u305f\u306e\u3067\u30e1\u30e2\u3092\u6b8b\u3059\u3002<\/p>\n<h2>\u57fa\u672c\u60c5\u5831<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8: https:\/\/www.rust-lang.org\/<\/ul>\n<\/li>\n<\/ul>\n<p>\u8272\u3093\u306a\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u65b9\u6cd5\u304c\u3042\u308b\u304c\u3001\u5468\u8fba\u30c4\u30fc\u30eb\u3092\u4f7f\u3044\u59cb\u3081\u308b\u3068\u7d50\u5c40\u672c\u5bb6\u304a\u85a6\u3081\u306e curl https:\/\/sh.rustup.rs -sSf | sh \u304c\u4e00\u756a\u826f\u304b\u3063\u305f\u3002<\/p>\n<p>\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb: https:\/\/doc.rust-lang.org\/book\/guessing-game.html<\/p>\n<p>Rust \u306e\u57fa\u672c\u304c\u66f8\u3044\u3066\u3042\u308b\u304c\u3001\u4e00\u756a\u9762\u767d\u3044\u53c2\u7167\u306b\u3064\u3044\u3066\u89e6\u308c\u3066\u306a\u3044\u3002<\/p>\n<p>\u53c2\u7167\u306b\u3064\u3044\u3066 https:\/\/doc.rust-lang.org\/book\/ownership.html<\/p>\n<p>Ownership, References and Borrowing, Lifetimes \u306e\u4e09\u7ae0\u3067 Rust \u306e Rust \u3089\u3057\u3044\u90e8\u5206\u304c\u89e3\u8aac\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n<h2>\u5f15\u3063\u304b\u304b\u3063\u305f\u6240<\/h2>\n<p>Rust \u306f\u3068\u3066\u3082\u7d20\u76f4\u306a\u6587\u6cd5\u3060\u3051\u3069\u3001\u8a18\u53f7\u3092\u4f7f\u3063\u3066\u3044\u3066\u691c\u7d22\u306b\u5f15\u3063\u304b\u304b\u308a\u3065\u3089\u304f\u5206\u304b\u308a\u306b\u304f\u3044\u6587\u6cd5\u304c\u3042\u3063\u305f\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5909\u6570\u540d\u306e\u30d3\u30c3\u30af\u30ea\u30de\u30fc\u30af ! \u306f\u30de\u30af\u30ed\u3092\u8868\u3059\u3002https:\/\/doc.rust-lang.org\/book\/macros.html<\/ul>\n<\/li>\n<\/ul>\n<p>\u6700\u521d\u306e Hello World \u304b\u3089 println! \u304c\u51fa\u3066\u6765\u308b\u304c\u3001\u3053\u308c\u306f\u30de\u30af\u30ed\u3002\u30de\u30af\u30ed\u304c\u3042\u308b\u3068\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u308f\u304b\u308a\u3065\u3089\u304f\u6ce8\u610f\u304c\u5fc5\u8981\u3002<\/p>\n<p>\u95a2\u6570\u9069\u7528\u5f8c\u306e\u306f\u3066\u306a\u30de\u30fc\u30af ? \u306f try! \u30de\u30af\u30ed https:\/\/m4rw3r.github.io\/rust-questionmark-operator<\/p>\n<p>API \u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e\u30b5\u30f3\u30d7\u30eb\u306b\u3088\u304f ? \u304c\u51fa\u3066\u6765\u308b\u3002\u3053\u308c\u306f\u95a2\u6570\u9069\u7528\u306e\u7d50\u679c\u304c\u30a8\u30e9\u30fc\u306e\u6642\u306b return \u3059\u308b\u30de\u30af\u30ed\u3002<br \/>\n\u30a8\u30e9\u30fc\u51e6\u7406\u3092\u4f8b\u5916\u3092\u4f7f\u308f\u305a\u7c21\u6f54\u306b\u8868\u73fe\u51fa\u6765\u308b\u3002<br \/>\n\u30ab\u30c3\u30b3\u9589\u3058\u5fd8\u308c\u7b49\u306e\u6587\u6cd5\u9593\u9055\u3044\u3067 std::ops::Carrier` is not satisfied \u3068\u3044\u3046\u8b0e\u306e\u30a8\u30e9\u30fc\u304c\u51fa\u308b\u306e\u3067\u6ce8\u610f\u304c\u5fc5\u8981\u3002<\/p>\n<p>\u95a2\u6570\u304b\u3089\u306e\u623b\u308a\u5024<\/p>\n<p>\u6700\u5f8c\u306e\u6587\u306b ; \u304c\u3042\u308b\u3068\u5024\u304c\u8fd4\u3089\u306a\u3044\u3002; \u304c\u7121\u3044\u3068\u305d\u306e\u5024\u304c\u8fd4\u308b\u3002<\/p>\n<p>\u30dd\u30a4\u30f3\u30bf\u6f14\u7b97\u5b50\u304c\u7121\u3044\u3002<\/p>\n<p>val \u304c Struct \u306e\u6642\u3001\u305d\u306e\u53c2\u7167\u3092 &amp;val \u3068\u66f8\u304f\u304c\u3001val.member \u3068 &amp;val.member \u306f\u540c\u3058\u3088\u3046\u306b Struct \u306e\u8981\u7d20\u3092\u6307\u3059\u3002<\/p>\n<h2>\u8272\u3005\u306a Struct \u306e\u8fd4\u3057\u65b9<\/h2>\n<p>Rust \u306e\u9762\u767d\u3044\u30e1\u30e2\u30ea\u7ba1\u7406\u306e\u4ed5\u7d44\u307f\u306f Ownership\u306b\u8a73\u3057\u304f\u66f8\u3044\u3066\u3042\u308b\u3051\u3069\u3001\u5b9f\u969b\u306b\u30b3\u30fc\u30c9\u3092\u66f8\u304b\u306a\u3044\u3068\u4f55\u306e\u305f\u3081\u306b\u3042\u308b\u306e\u304b\u308f\u304b\u308a\u3065\u3089\u3044\u3067\u3059\u3002\u305d\u3053\u3067\u3001\u3042\u308b Struct \u3092\u8272\u3093\u306a\u65b9\u6cd5\u3067\u95a2\u6570\u304b\u3089\u8fd4\u3057\u3066\u9055\u3044\u3092\u898b\u307e\u3059\u3002\u4ed5\u69d8\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u611f\u3058\u3067\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u3042\u308b\u95a2\u6570\u306f\u6587\u5b57\u5217\u306e\u7d44 (String, String) \u3092\u53d7\u3051\u53d6\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u3042\u308b\u95a2\u6570\u306f\u4e8c\u3064\u306e\u6587\u5b57\u5217\u304b\u3089\u51fa\u6765\u305f Struct \u3092\u8fd4\u3059\u3002<\/ul>\n<pre class=\"post-pre\"><code><span class=\"nd\">#[derive(Debug)]<\/span>\r\n<span class=\"k\">struct<\/span> <span class=\"n\">RealStruct<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">head<\/span><span class=\"p\">:<\/span> <span class=\"nb\">String<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"n\">tail<\/span><span class=\"p\">:<\/span> <span class=\"nb\">String<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h3>1. \u53c2\u7167\u3092\u501f\u308a\u3066\u5b9f\u4f53\u3092\u8fd4\u3059\u3002clone \u304c\u767a\u751f\u3059\u308b\u3002<\/h3>\n<p>\u307e\u305a\u6700\u521d\u306b\u601d\u3044\u3064\u3044\u305f rust \u30b3\u30f3\u30d1\u30a4\u30e9\u306b\u6012\u3089\u308c\u306a\u3044\u65b9\u6cd5\u306f\u3001\u6587\u5b57\u5217\u306e\u7d44\u306e\u53c2\u7167\u3092\u53d7\u3051\u53d6\u3063\u3066\u5404\u8981\u7d20\u3092\u30b3\u30d4\u30fc\u3057\u3001Struct \u3092\u4f5c\u3063\u3066\u8fd4\u3059\u3084\u308a\u65b9\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">real_from_ref<\/span><span class=\"p\">(<\/span><span class=\"n\">pair<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"p\">(<\/span><span class=\"nb\">String<\/span><span class=\"p\">,<\/span> <span class=\"nb\">String<\/span><span class=\"p\">))<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">RealStruct<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">RealStruct<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">head<\/span><span class=\"p\">:<\/span> <span class=\"n\">pair<\/span><span class=\"na\">.0<\/span><span class=\"nf\">.clone<\/span><span class=\"p\">(),<\/span> <span class=\"c\">\/\/ pair.0 \u3067\u5f15\u6570 pair \u306e\u6700\u521d\u306e\u8981\u7d20\u3092\u6307\u3059<\/span>\r\n        <span class=\"n\">tail<\/span><span class=\"p\">:<\/span> <span class=\"n\">pair<\/span><span class=\"na\">.1<\/span><span class=\"nf\">.clone<\/span><span class=\"p\">(),<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5165\u529b\u306f\u53c2\u7167\u306a\u306e\u3067\u8efd\u3044\u3067\u3059\u304c\u3001Struct \u3092\u4f5c\u308b\u306b\u3042\u305f\u3063\u3066\u6587\u5b57\u5217\u3092 clone() \u3057\u3066\u3044\u307e\u3059\u3002rust \u306f\u3053\u306e clone() \u304c\u7121\u3044\u3068\u30b3\u30f3\u30d1\u30a4\u30eb\u3092\u901a\u3057\u307e\u305b\u3093\u3002\u4f55\u6545\u304b\u3068\u8a00\u3046\u3068\u3001rust \u3067\u306f\u30d2\u30fc\u30d7\u5185\u306e\u30c7\u30fc\u30bf(\u3053\u306e\u5834\u5408 String)\u306e\u6301\u3061\u4e3b(\u5b9f\u4f53\u3092\u5272\u308a\u5f53\u3066\u3089\u308c\u305f\u5909\u6570)\u306e\u30b9\u30b3\u30fc\u30d7\u306e\u5916\u3067\u30c7\u30fc\u30bf\u3092\u53c2\u7167\u51fa\u6765\u306a\u3044\u3068\u3044\u3046\u5236\u9650\u304c\u3042\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n<p>Rust \u306e\u753b\u671f\u7684\u306a\u6240\u306f\u3001\u30b9\u30bf\u30c3\u30af\u4e0a\u306e\u30c7\u30fc\u30bf\u3068\u540c\u3058\u3088\u3046\u306b\u30d2\u30fc\u30d7\u4e0a\u306e\u30c7\u30fc\u30bf\u3082\u30b9\u30b3\u30fc\u30d7\u304b\u3089\u629c\u3051\u308b\u3068\u81ea\u52d5\u7684\u306b\u89e3\u653e\u3059\u308b\u6240\u3067\u3059\u3002\u3053\u306e\u304a\u9670\u3067 GC \u304c\u7121\u304f\u3066\u3082\u5b89\u5168\u306b\u30e1\u30e2\u30ea\u3092\u4f7f\u3046\u4e8b\u304c\u51fa\u6765\u307e\u3059\u3002\u30d2\u30fc\u30d7\u5185\u306e\u30c7\u30fc\u30bf\u306b\u306f\u5fc5\u305a\u4e00\u4eba\u6301\u3061\u4e3b\u304c\u3044\u307e\u3059\u3002\u305d\u306e\u6301\u3061\u4e3b\u304c\u30b9\u30b3\u30fc\u30d7\u304b\u3089\u629c\u3051\u308b\u6642\u306b\u30d2\u30fc\u30d7\u5185\u306e\u30c7\u30fc\u30bf\u3082\u89e3\u653e\u3055\u308c\u307e\u3059\u3002\u4e0a\u306e real_from_ref \u3067\u3082\u3057\u3082 clone() \u3057\u306a\u3044\u3068\u3001\u540c\u3058\u6587\u5b57\u5217\u3092\u53c2\u7167\u3059\u308b\u5225\u306e\u5909\u6570\u304c\u51fa\u6765\u3066\u3057\u307e\u3046\u306e\u3067 Rust \u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3092\u51fa\u3057\u307e\u3059\u3002\u5b9f\u969b\u306b real_from_ref \u3092\u547c\u3073\u51fa\u3059\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>    <span class=\"k\">let<\/span> <span class=\"n\">dst<\/span><span class=\"p\">:<\/span> <span class=\"n\">RealStruct<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">{<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">src<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"s\">\"Hello\"<\/span><span class=\"nf\">.to_string<\/span><span class=\"p\">(),<\/span> <span class=\"s\">\"world\"<\/span><span class=\"nf\">.to_string<\/span><span class=\"p\">());<\/span> <span class=\"c\">\/\/ to_string() \u306f\u6587\u5b57\u5217\u30ea\u30c6\u30e9\u30eb\u304b\u3089 String \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u308b\u3002<\/span>\r\n        <span class=\"n\">dst<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">real_from_ref<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">src<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"inside dst: {:?}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">dst<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ \u3061\u3083\u3093\u3068\u4f5c\u308c\u305f\u3002<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"src: {:?}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">src<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ \u5143\u30c7\u30fc\u30bf\u3082\u8aad\u3081\u308b\u3002<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"outside dst: {:?}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">dst<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ \u30b9\u30b3\u30fc\u30d7\u3092\u629c\u3051\u3066\u3082\u4f7f\u3048\u308b\u3002<\/span>\r\n<\/code><\/pre>\n<p>clone() \u306e\u5206\u3060\u3051\u624b\u9593\u3067\u3059\u304c\u3001\u304a\u9670\u3067 src \u306e\u30b9\u30b3\u30fc\u30d7\u3092\u629c\u3051\u305f\u5f8c\u3067\u3082 dst \u306f\u4f7f\u3048\u307e\u3059\u3002<\/p>\n<h3>2. \u5b9f\u4f53\u3092\u53d7\u3051\u53d6\u308a\u5b9f\u4f53\u3092\u8fd4\u3059\u3002\u53d7\u3051\u53d6\u3063\u305f\u30c7\u30fc\u30bf\u3092\u305d\u306e\u307e\u307e\u8981\u7d20\u3068\u3057\u3066\u4f7f\u3046\u3002<\/h3>\n<p>\u6b21\u306b\u5b9f\u4f53\u3092\u53d7\u3051\u53d6\u308a\u5b9f\u4f53\u3092\u305d\u306e\u307e\u307e\u8fd4\u3057\u3066\u307f\u307e\u3059\u3002\u53d7\u3051\u53d6\u3063\u305f\u30c7\u30fc\u30bf\u3092\u305d\u306e\u307e\u307e clone() \u305b\u305a\u8981\u7d20\u3068\u3057\u3066\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>fn real_from_real(pair: (String, String)) -&gt; RealStruct {\r\n    RealStruct {\r\n        head: pair.0,\r\n        tail: pair.1,\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u666e\u901a\u306e\u8a00\u8a9e\u3063\u307d\u3044\u66f8\u304d\u65b9\u3067\u3059\u304c\u3001\u3053\u306e\u5834\u5408\u547c\u3073\u51fa\u3057\u5074\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>    <span class=\"k\">let<\/span> <span class=\"n\">dst<\/span><span class=\"p\">:<\/span> <span class=\"n\">RealStruct<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">{<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">src<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"s\">\"Hello\"<\/span><span class=\"nf\">.to_string<\/span><span class=\"p\">(),<\/span> <span class=\"s\">\"world\"<\/span><span class=\"nf\">.to_string<\/span><span class=\"p\">());<\/span>\r\n        <span class=\"n\">dst<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">real_from_real<\/span><span class=\"p\">(<\/span><span class=\"n\">src<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"inside dst: {:?}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">dst<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ \u3061\u3083\u3093\u3068\u4f5c\u308c\u305f\u3002<\/span>\r\n        <span class=\"c\">\/\/ println!(\"src: {:?}\", src); \/\/ \u5143\u30c7\u30fc\u30bf\u306f\u79fb\u52d5\u3057\u3066\u3057\u307e\u3063\u305f\u306e\u3067\u8aad\u3081\u306a\u3044!!!<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"outside dst: {:?}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">dst<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ \u30b9\u30b3\u30fc\u30d7\u3092\u629c\u3051\u3066\u3082\u4f7f\u3048\u308b\u3002<\/span>\r\n<\/code><\/pre>\n<p>Rust \u3067\u306f\u3001\u30d2\u30fc\u30d7\u5185\u306e\u30c7\u30fc\u30bf\u306e\u6301\u3061\u4e3b\u306f\u4e00\u4eba\u3068\u6c7a\u307e\u3063\u3066\u3044\u307e\u3059\u3002dst = real_from_real(src); \u3067 src \u306b\u3042\u3063\u305f\u30c7\u30fc\u30bf\u306e\u6240\u6709\u6a29\u3092\u95a2\u6570\u306b\u6e21\u3057\u3066\u3057\u307e\u3063\u305f\u306e\u3067\u3001\u305d\u306e\u5f8c src \u3092\u4f7f\u3046\u3053\u3068\u306f\u51fa\u6765\u307e\u305b\u3093\u3002\u3053\u306e\u3088\u3046\u306b\u5b9f\u4f53\u304b\u3089 clone() \u7121\u3057\u3067\u5b9f\u4f53\u3092\u4f5c\u308b\u3068\u5143\u306e\u5909\u6570\u3092\u4f7f\u3048\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u3063\u3066\u5b89\u5168\u306b\u30bc\u30ed\u30b3\u30d4\u30fc\u306a\u51e6\u7406\u3092\u66f8\u304f\u4e8b\u304c\u51fa\u6765\u307e\u3059\u3002<\/p>\n<h3>3. \u53c2\u7167\u3092\u53d7\u3051\u53d6\u308a\u53c2\u7167\u5165\u308a\u306e\u69cb\u9020\u3092\u8fd4\u3059\u3002<\/h3>\n<p>\u4eca\u5ea6\u306f\u3061\u3087\u3063\u3068\u8da3\u5411\u3092\u5909\u3048\u3066\u3001Struct \u306b\u53c2\u7167\u3092\u5165\u308c\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nd\">#[derive(Debug)]<\/span>\r\n<span class=\"k\">struct<\/span> <span class=\"n\">RefStruct<\/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\">head<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nv\">'a<\/span> <span class=\"nb\">str<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"n\">tail<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"nv\">'a<\/span> <span class=\"nb\">str<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>&#8216;a \u306f lifetime parameter \u3068\u3044\u3046\u7269\u3067\u3059\u304c\u3001\u307e\u3060\u79c1\u306f\u8aac\u660e\u51fa\u6765\u307e\u305b\u3093\u3002\u3002\u3002\u514e\u306b\u89d2\u53c2\u7167\u3092\u4f7f\u3063\u305f\u69cb\u9020\u3092\u8fd4\u3057\u3066\u307f\u307e\u3059\u3002\u3053\u308c\u3060\u3068 clone() \u3082\u305b\u305a\u3001\u6240\u6709\u6a29\u3082\u79fb\u52d5\u3057\u306a\u3044\u306e\u3067\u4e00\u756a\u3088\u3055\u3052\u306b\u898b\u3048\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">ref_from_ref<\/span><span class=\"p\">(<\/span><span class=\"n\">pair<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"p\">(<\/span><span class=\"nb\">String<\/span><span class=\"p\">,<\/span> <span class=\"nb\">String<\/span><span class=\"p\">))<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">RefStruct<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">RefStruct<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">head<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">pair<\/span><span class=\"na\">.0<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">tail<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">pair<\/span><span class=\"na\">.1<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6b8b\u5ff5\u306a\u304c\u3089\u3053\u308c\u3082\u547c\u3073\u51fa\u3057\u5074\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>    <span class=\"p\">{<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">src<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"s\">\"Hello\"<\/span><span class=\"nf\">.to_string<\/span><span class=\"p\">(),<\/span> <span class=\"s\">\"world\"<\/span><span class=\"nf\">.to_string<\/span><span class=\"p\">());<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">dst<\/span><span class=\"p\">:<\/span> <span class=\"n\">RefStruct<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/ dst \u306f src \u306e\u5f8c\u3067\u5ba3\u8a00\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002\u30b9\u30b3\u30fc\u30d7\u3092\u51fa\u308b\u6642\u5ba3\u8a00\u306e\u9006\u9806\u3067\u7834\u68c4\u3059\u308b\u306e\u3067\u3001src \u3088\u308a\u9577\u751f\u304d\u3057\u3066\u306f\u306a\u3089\u306a\u3044\u3002<\/span>\r\n        <span class=\"n\">dst<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">ref_from_ref<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">src<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"inside dst: {:?}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">dst<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ \u3061\u3083\u3093\u3068\u4f5c\u308c\u305f\u3002<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"src: {:?}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">src<\/span><span class=\"p\">);<\/span> <span class=\"c\">\/\/ \u5143\u30c7\u30fc\u30bf\u3082\u8aad\u3081\u308b\u3002<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u6240\u6709\u6a29\u306e\u79fb\u52d5\u3082\u30b3\u30d4\u30fc\u3082\u7121\u3044\u306e\u3067\u3001dst \u306b\u69cb\u9020\u304c\u6e21\u3055\u308c\u305f\u5f8c\u3067\u3082\u30c7\u30fc\u30bf\u306e\u6240\u6709\u6a29\u306f src \u306b\u3042\u308a\u307e\u3059\u3002\u3068\u3044\u3046\u4e8b\u306f\u3001src \u306e\u30b9\u30b3\u30fc\u30d7\u3092\u5916\u308c\u308b\u3068 dst \u3092\u4f7f\u3046\u4e8b\u306f\u51fa\u6765\u307e\u305b\u3093\u3002Rust \u30b3\u30f3\u30d1\u30a4\u30e9\u306f\u30c7\u30fc\u30bf\u306e\u6240\u6709\u8005\u306e\u30b9\u30b3\u30fc\u30d7\u5916\u3067\u30c7\u30fc\u30bf\u3092\u53c2\u7167\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3061\u3083\u3093\u3068\u30a8\u30e9\u30fc\u3092\u691c\u51fa\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n<h3>\u307e\u3068\u3081<\/h3>\n<div>\n<div class=\"post-table\">\n\u5229\u70b9\u6b20\u70b9\u53c2\u7167\u3092\u501f\u308a\u3066 clone() \u3057\u3066\u5b9f\u4f53\u3092\u8fd4\u3059\u5f15\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u304b\u3089\u5916\u308c\u3066\u3082\u4f7f\u3048\u308bclone() \u304c\u5fc5\u8981\u5b9f\u4f53\u3092\u53d7\u3051\u53d6\u308a\u8981\u7d20\u306b\u5165\u308c\u3066\u8fd4\u3059\u5f15\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u304b\u3089\u5916\u308c\u3066\u3082\u4f7f\u3048\u308b\u5143\u30c7\u30fc\u30bf\u304c\u4f7f\u3048\u306a\u304f\u306a\u308b\u53c2\u7167\u3092\u53d7\u3051\u53d6\u308a\u8981\u7d20\u306e\u53c2\u7167\u306b\u3057\u3066\u8fd4\u3059\u9069\u7528\u5f8c\u3082\u5f15\u6570\u306e\u30c7\u30fc\u30bf\u3092\u4f7f\u3048\u308b\u5143\u30c7\u30fc\u30bf\u304c\u30b9\u30b3\u30fc\u30d7\u304b\u3089\u5916\u308c\u308b\u3068\u4f5c\u3063\u305f\u30c7\u30fc\u30bf\u3082\u4f7f\u3048\u306a\u3044<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u3075\u3068\u601d\u3044\u7acb\u3063\u3066 Rust \u3068\u3044\u3046\u8a00\u8a9e\u3067\u3042\u308b\u81ea\u5206\u7528\u306e\u30c4\u30fc\u30eb\u3092\u66f8\u3044\u305f\u3002\u5927\u5909\u6c17\u306b\u5165\u3063\u305f\u306e\u3067\u30e1\u30e2\u3092\u6b8b\u3059\u3002 \u57fa\u672c\u60c5\u5831 \u30a6 [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45356","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\/45356-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u3075\u3068\u601d\u3044\u7acb\u3063\u3066 Rust \u3068\u3044\u3046\u8a00\u8a9e\u3067\u3042\u308b\u81ea\u5206\u7528\u306e\u30c4\u30fc\u30eb\u3092\u66f8\u3044\u305f\u3002\u5927\u5909\u6c17\u306b\u5165\u3063\u305f\u306e\u3067\u30e1\u30e2\u3092\u6b8b\u3059\u3002 \u57fa\u672c\u60c5\u5831 \u30a6 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45356-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2022-12-24T13:53:57+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-04T00:54:36+00:00\" \/>\n<meta name=\"author\" content=\"\u9038, \u79d1\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u9038, \u79d1\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\" \/>\n<script 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