{"id":45617,"date":"2023-11-23T16:52:49","date_gmt":"2023-04-26T20:10:40","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45617-2\/"},"modified":"2024-05-04T10:28:19","modified_gmt":"2024-05-04T02:28:19","slug":"45617-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45617-2\/","title":{"rendered":""},"content":{"rendered":"

\u6982\u8981<\/h2>\n

\u3053\u306e\u8a18\u4e8b\u3067\u306fRust\u521d\u5fc3\u8005\u304c\u9a5a\u3044\u305f\u308a\u6df7\u4e71\u3055\u305b\u3089\u308c\u305f\u308a\u3059\u308b\u3088\u3046\u306aRust\u306e\u6587\u6cd5\u309210\u9805\u76ee\u96c6\u3081\u3066\u307f\u307e\u3057\u305f\u3002
\n\u3053\u308c\u3089\u306e\u9805\u76ee\u306f\u77e5\u3089\u306a\u3044\u3068\u7406\u89e3\u3067\u304d\u306a\u304b\u3063\u305f\u308a\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u60a9\u307e\u3055\u308c\u305f\u308a\u3059\u308b\u4e00\u898b\u5384\u4ecb\u306a\u3082\u306e\u305f\u3061\u306a\u306e\u3067\u3059\u304c\u3001\u305d\u306e\u3088\u3046\u306a\u76f4\u611f\u7684\u3067\u306a\u3044\u6319\u52d5\u3092\u6562\u3048\u3066\u3055\u305b\u3066\u3044\u308b\u3068\u3053\u308d\u306b\u306f\u91cd\u8981\u306a\u610f\u5473\u304c\u8fbc\u3081\u3089\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002
\n\u305d\u306e\u305f\u3081\u3001\u3053\u308c\u3089\u306e\u9805\u76ee\u3092\u901a\u3057\u3066Rust\u304c\u76ee\u6307\u3057\u3066\u3044\u308b\u3082\u306e\u3084\u5b9f\u73fe\u3057\u305f\u3044\u6a5f\u80fd\u306e\u4e00\u90e8\u3092\u57a3\u9593\u898b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n

1. \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u4ee3\u5165\u304c\u30e0\u30fc\u30d6<\/h3>\n

Rust\u306e\u6700\u5927\u306e\u7279\u5fb4\u304c\u6240\u6709\u6a29\u306e\u6982\u5ff5\u3067\u3042\u308b\u3053\u3068\u306f\u6709\u540d\u3067\u3059\u304c\u3001\u305d\u308c\u3067\u3082\u306a\u304a\u521d\u5fc3\u8005\u6bba\u3057\u306b\u306a\u308b\u306e\u304c\u30e0\u30fc\u30d6\u3067\u3059\u3002
\n\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u304c\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u308b\u30e1\u30b8\u30e3\u30fc\u306a\u8a00\u8a9e\u306f\u73fe\u72b6Rust\u304f\u3089\u3044\u3057\u304b\u7121\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n

let<\/span> mut<\/span> a<\/span> =<\/span> vec!<\/span>[<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>];<\/span>\r\nlet<\/span> mut<\/span> b<\/span> =<\/span> a<\/span>;<\/span> \/\/ \u3053\u3053\u3067a\u306e\u6301\u3064\u30d9\u30af\u30bf\u306e\u6240\u6709\u6a29\u304cb\u306b\u30e0\u30fc\u30d6\u3055\u308c\u3001a\u306f\u7121\u52b9\u306b\uff01<\/span>\r\na<\/span>[<\/span>0<\/span>]<\/span> =<\/span> 2<\/span>;<\/span> \/\/ \u3053\u3053\u3067\u30a8\u30e9\u30fc -> error[E0382]: borrow of moved value: `a`<\/span>\r\n\/\/ \u30b3\u30d4\u30fc\u3057\u305f\u3044\u5834\u5408\u306f\u3001let mut b = a.clone();\u3068\u3059\u308c\u3070OK<\/span>\r\n<\/code><\/pre>\n
\u3053\u306e\u3088\u3046\u306a\u6240\u6709\u6a29\u306e\u30e0\u30fc\u30d6\u306e\u6982\u5ff5\u306fC++\u306b\u304a\u3044\u3066\u65e2\u306bunique_ptr\u3068\u3057\u3066\u5b9f\u88c5\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u304c\u3001\u6240\u6709\u6a29\u3092\u5931\u3063\u305f\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u3082\u30b3\u30f3\u30d1\u30a4\u30eb\u306e\u6bb5\u968e\u3067\u306f\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u305b\u3093\u3002
\n\u30e0\u30fc\u30d6\u306f\u7121\u99c4\u306a\u30e1\u30e2\u30ea\u30b3\u30d4\u30fc\u3092\u9632\u3050\u3060\u3051\u3067\u306a\u304f\u3001\u5358\u4e00\u30ea\u30bd\u30fc\u30b9\u306e\u7ba1\u7406\u3084\u30b9\u30ec\u30c3\u30c9\u7af6\u5408\u306e\u9632\u6b62\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002
\n\u305d\u306e\u305f\u3081\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u6240\u6709\u6a29\u304c\u6709\u52b9\u3067\u3042\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u3066\u304f\u308c\u308bRust\u3067\u306f\u3001\u305d\u306e\u3088\u3046\u306a\u30e0\u30fc\u30d6\u306e\u6069\u6075\u3092\u6700\u5927\u9650\u4eab\u53d7\u3059\u308b\u305f\u3081\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u4ee3\u5165\u64cd\u4f5c\u304c\u30e0\u30fc\u30d6\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002
\n\u3057\u304b\u3057\u6163\u308c\u306a\u3044\u3068\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u5f15\u3063\u304b\u304b\u308b\u3053\u3068\u304c\u591a\u3005\u3042\u308b\u3067\u3057\u3087\u3046\u3002
\n\u305f\u3068\u3048\u3070+\u6f14\u7b97\u5b50\u306b\u3088\u308b\u6587\u5b57\u5217\u9023\u7d50\u306e\u7b2c1\u30aa\u30da\u30e9\u30f3\u30c9\u3082\u30e0\u30fc\u30d6\u3055\u308c\u307e\u3059\u3002<\/p>\n
let<\/span> a<\/span> =<\/span> String<\/span>::<\/span>from<\/span>(<\/span>\"a\"<\/span>);<\/span>\r\nlet<\/span> b<\/span> =<\/span> a<\/span> +<\/span> \"b\"<\/span>;<\/span> \/\/ \u3053\u3053\u3067a\u306e\u6240\u6709\u3059\u308bString\u304cb\u306b\u30e0\u30fc\u30d6\u3055\u308c\u3001a\u306f\u7121\u52b9\u306b\uff01<\/span>\r\nprintln!<\/span>(<\/span>\"{}\"<\/span>,<\/span> a<\/span>);<\/span> \/\/ error[E0382]: borrow of moved value: `a`<\/span>\r\n\/\/ \u306a\u304a+\u6f14\u7b97\u5b50\u3067\u306f\u306a\u304flet b = format!(\"{}{}\", a, \"b\");\u3068\u3057\u3066\u304a\u3051\u3070\u3053\u306e\u554f\u984c\u306f\u8d77\u3053\u308a\u307e\u305b\u3093<\/span>\r\n<\/code><\/pre>\n
\u307e\u305f\u3001\u30e1\u30bd\u30c3\u30c9\u306eself\u306b&\u3092\u3064\u3051\u5fd8\u308c\u308b\u3068\u3053\u3093\u306a\u30a8\u30e9\u30fc\u3082\u3002<\/p>\n
struct<\/span> Foo<\/span> {}<\/span>\r\n\r\nimpl<\/span> Foo<\/span> {<\/span>\r\n    fn<\/span> foo<\/span>(<\/span>self<\/span>)<\/span> {<\/span> \/\/ &self\uff08\u53c2\u7167\uff09\u3068\u3059\u3079\u304d\u3068\u3053\u308d\u3092self\u3068\u3057\u305f\u305f\u3081\u30e0\u30fc\u30d6\u306b\uff01<\/span>\r\n        println!<\/span>(<\/span>\"foo\"<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> f<\/span> =<\/span> Foo<\/span> {};<\/span>\r\n    f<\/span>.foo<\/span>();<\/span> \/\/ \u3053\u3053\u3067f\u304cfoo(self)\u95a2\u6570\u5185\u306e\u30b9\u30b3\u30fc\u30d7\u306b\u30e0\u30fc\u30d6\u3055\u308c\u3066\u3057\u307e\u3046<\/span>\r\n    f<\/span>.foo<\/span>();<\/span> \/\/ error[E0382]: use of moved value: `f`<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
2. \u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u30b3\u30d4\u30fc\u3055\u308c\u308b\u3082\u306e\u3082\u3042\u308b\uff08Copy\u30c8\u30ec\u30a4\u30c8\uff09<\/h3>\n
\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u4ee3\u5165\u64cd\u4f5c\u304c\u30e0\u30fc\u30d6\u3067\u3042\u308b\u3053\u3068\u3092\u5b66\u3076\u3093\u3060\u3070\u304b\u308a\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u6b63\u5e38\u306b\u51e6\u7406\u3055\u308c\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u3089\u306a\u3044\u3053\u3068\u306b\u6df7\u4e71\u3059\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n
let<\/span> a<\/span> =<\/span> 1<\/span>;<\/span>\r\nlet<\/span> b<\/span> =<\/span> a<\/span>;<\/span> \/\/ \u3053\u3053\u306f\u30e0\u30fc\u30d6\u3067\u306f\u306a\u304f\u5024\u304c\u30b3\u30d4\u30fc\u3055\u308c\u3066\u3044\u308b<\/span>\r\nprintln!<\/span>(<\/span>\"{}\"<\/span>,<\/span> a<\/span>);<\/span> \/\/ \u3053\u308c\u306fOK<\/span>\r\nlet<\/span> tp<\/span> =<\/span> (<\/span>1<\/span>,<\/span> true<\/span>,<\/span> 'a'<\/span>);<\/span>\r\nlet<\/span> tp2<\/span> =<\/span> tp<\/span>;<\/span> \/\/ \u3053\u3053\u3082\u5024\u304c\u30b3\u30d4\u30fc\u3055\u308c\u3066\u3044\u308b<\/span>\r\nprintln!<\/span>(<\/span>\"{:?}\"<\/span>,<\/span> tp<\/span>);<\/span> \/\/ \u3053\u308c\u3082OK<\/span>\r\n<\/code><\/pre>\n
\u3053\u308c\u306f\u6570\u5024\u578b\u3084bool\u578b\u3001char\u578b\u306b\u5bfe\u3057\u3066Copy\u30c8\u30ec\u30a4\u30c8\u304c\u9069\u7528\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3067\u3001\u3053\u308c\u3089Copy\u30c8\u30ec\u30a4\u30c8\u304c\u63d0\u4f9b\u3055\u308c\u3066\u3044\u308b\u578b\u3068\u305d\u308c\u3089\u306e\u578b\u306e\u307f\u3067\u69cb\u6210\u3055\u308c\u305f\u30bf\u30d7\u30eb\u578b\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u4ee3\u5165\u64cd\u4f5c\u304c\u30e0\u30fc\u30d6\u3067\u306f\u306a\u304f\u30b3\u30d4\u30fc\u3068\u306a\u308a\u307e\u3059\u3002
\n\u3053\u3046\u306a\u3063\u3066\u3044\u308b\u306e\u306f\u3001\u30b3\u30d4\u30fc\u3057\u3066\u3082\u30b3\u30b9\u30c8\u306b\u306a\u3089\u306a\u3044\u3057\u56f0\u3089\u306a\u3044\u57fa\u672c\u7684\u306a\u5024\u3092\u793a\u3059\u578b\u307e\u3067\u30e0\u30fc\u30d6\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u7121\u99c4\u306b\u30b3\u30fc\u30c9\u304c\u7169\u96d1\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u304b\u3089\u3067\u3057\u3087\u3046\u3002
\n\u3068\u306f\u3044\u3048\u3053\u306e\u3053\u3068\u3092\u77e5\u3089\u306a\u3044\u3068\u6df7\u4e71\u3057\u3066\u3057\u307e\u3046\u3053\u3068\u9593\u9055\u3044\u306a\u3057\u3067\u3059\u3002<\/p>\n
3. Hello, world\u3067\u3044\u304d\u306a\u308a\u51fa\u3066\u304f\u308b\u8b0e\u306e\u30d3\u30c3\u30af\u30ea\u30de\u30fc\u30af\uff08\u30de\u30af\u30ed\u547c\u3073\u51fa\u3057\uff09<\/h3>\n
\/\/ Rust\u306eHello, world<\/span>\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    println!<\/span>(<\/span>\"Hello, world\"<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u3053\u308c\u304b\u3089Rust\u3092\u5b66\u3073\u59cb\u3081\u3088\u3046\u3068\u6700\u521d\u306bprintln!(“Hello, world”)\u3092\u898b\u308b\u3068\u3001Rust\u3067\u306f\u95a2\u6570\u547c\u3073\u51fa\u3057\u306b\u30d3\u30c3\u30af\u30ea\u30de\u30fc\u30af\u3092\u3064\u3051\u308b\u5fc5\u8981\u304c\u3042\u308b\u306e\u304b\u3068\u52d8\u9055\u3044\u3057\u305d\u3046\u306b\u306a\u308a\u307e\u3059\u304c\u3001\u3053\u308c\u306f\u30de\u30af\u30ed\u547c\u3073\u51fa\u3057\u306e\u6587\u6cd5\u3067\u3059\u3002
\nprintln\u306f\u95a2\u6570\u3067\u306f\u306a\u304f\u30de\u30af\u30ed\u3067\u3042\u308a\u3001\u30de\u30af\u30ed\u3092\u547c\u3073\u51fa\u3059\u969b\u306b!\u3092\u3064\u3051\u308b\u3068\u3044\u3046\u30eb\u30fc\u30eb\u306a\u306e\u3067println!\u3068\u66f8\u304f\u306e\u3067\u3059\u3002
\nprintln\u306fprintln!(“({}, {})”, foo, bar);\u306e\u3088\u3046\u306b\u53ef\u5909\u500b\u306e\u5f15\u6570\u3092\u53d6\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3059\u304c\u3001Rust\u3067\u306f\u53ef\u5909\u500b\u306e\u5f15\u6570\u3092\u53d6\u308b\u95a2\u6570\u306f\u5b9a\u7fa9\u3067\u304d\u306a\u3044\u306e\u3067\u3001println\u304c\u30de\u30af\u30ed\u3060\u3068\u5206\u304b\u308a\u307e\u3059\u3002
\n\u4ed6\u306b\u3082\u30d9\u30af\u30bf\u3092\u4f5c\u308b\u3068\u304d\u306blet v = vec![1, 2, 3];\u306e\u3088\u3046\u306a\u66f8\u304d\u65b9\u3082\u51fa\u3066\u304d\u307e\u3059\u304c\u3001\u3053\u308c\u3082\u53ef\u5909\u500b\u306e\u5f15\u6570\u3092\u53d6\u308b\u30de\u30af\u30ed\u306e\u4f8b\u3060\u3068\u3044\u3048\u307e\u3059\u3002
\n\u30de\u30af\u30ed\u306f\u7c21\u5358\u306b\u8a00\u3046\u3068\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u8a18\u8f09\u3055\u308c\u305f\u624b\u7d9a\u304d\u306b\u5f93\u3063\u3066\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3092\u81ea\u52d5\u7684\u306b\u751f\u6210\u3059\u308b\u4ed5\u7d44\u307f\u306e\u3053\u3068\u3067\u3001\u30e1\u30bf\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3068\u547c\u3070\u308c\u307e\u3059\u3002
\n\u305f\u3068\u3048\u3070let v = vec![1, 2, 3];\u306e\u3088\u3046\u306b\u30de\u30af\u30ed\u547c\u3073\u51fa\u3057\u3092\u3057\u305f\u5834\u5408\u3001\u5225\u306e\u5834\u6240\uff08vec!\u306e\u5834\u5408\u306fRust\u306e\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u30bd\u30fc\u30b9\uff09\u306b\u8a18\u8ff0\u3055\u308c\u305fvec\u30de\u30af\u30ed\u306e\u5b9a\u7fa9\u306b\u3057\u305f\u304c\u3063\u3066{ let mut v = Vec::new(); v.push(1); v.push(2); v.push(3); v }\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\uff08\u5b9f\u969b\u306f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u305f\u3081\u3082\u3063\u3068\u8907\u96d1\u306a\u30b3\u30fc\u30c9\u306b\u306a\u308a\u307e\u3059\u304c\uff09\u3092\u751f\u6210\u3057\u307e\u3059\u3002
\n\u4ed6\u306b\u3082Rust\u3067\u306f\u53ef\u5909\u500b\u306e\u5f15\u6570\u3092\u53d6\u308b\u4fbf\u5229\u306a\u51e6\u7406\u304c\u30de\u30af\u30ed\u3067\u591a\u304f\u5b9f\u88c5\u3055\u308c\u3066\u304a\u308a\u3001\u521d\u5fc3\u8005\u3082\u3044\u304d\u306a\u308a\u591a\u304f\u306e\u30de\u30af\u30ed\u3092\u76ee\u306b\u3059\u308b\u3053\u3068\u306b\u306a\u308b\u306e\u3067\u6238\u60d1\u3046\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n
4. \u623b\u308a\u5024\u304c\u3042\u308b\u306e\u306breturn\u6587\u306e\u7121\u3044\u95a2\u6570<\/h3>\n
Rust\u3067\u306f\u623b\u308a\u5024\u304c\u3042\u308b\u306e\u306breturn\u6587\u306e\u7121\u3044\u95a2\u6570\u3092\u898b\u304b\u3051\u307e\u3059\u3002\u305d\u3057\u3066\u3088\u304f\u898b\u308b\u3068\u6587\u672b\u306b\u30bb\u30df\u30b3\u30ed\u30f3\u304c\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n
fn<\/span> foo<\/span>()<\/span> -><\/span> String<\/span> {<\/span>\r\n    String<\/span>::<\/span>from<\/span>(<\/span>\"foo!!\"<\/span>)<\/span> \/\/ <- \u6587\u672b\u3092\u793a\u3059\u30bb\u30df\u30b3\u30ed\u30f3\u304c\u7121\u3044<\/span>\r\n}<\/span>\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> foo<\/span>());<\/span> \/\/ foo!!<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u3053\u308c\u306f\u6700\u5f8c\u306e\u5f0f\u3067\u8a55\u4fa1\u3055\u308c\u305f\u5024\u304c\u623b\u308a\u5024\u306b\u306a\u308b\u3068\u3044\u3046Rust\u306e\u4ed5\u7d44\u307f\u306b\u3088\u308b\u3082\u306e\u3067\u3059\u3002
\n\u300c\u6700\u5f8c\u306e\u300d\u5f0f\u306a\u306e\u3067\u3001\u623b\u308a\u5024\u306b\u3059\u308b\u5834\u5408\u306f\u95a2\u6570\u306e\u672b\u5c3e\u306b\u66f8\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\n\u3067\u3059\u306e\u3067\u95a2\u6570\u306e\u672b\u5c3e\u4ee5\u5916\u3067\u5024\u3092\u8fd4\u3057\u305f\u3044\u5834\u5408\u306freturn\u6587\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002\uff08\u672b\u5c3e\u3067return\u6587\u3092\u4f7f\u3063\u3066\u3082OK\uff09<\/p>\n
\u3055\u3066\u3001\u3053\u3053\u3067Rust\u306b\u304a\u3044\u3066\u5f0f\u3068\u306f\u4f55\u304b\u306b\u3064\u3044\u3066\u3082\u8aac\u660e\u3057\u3066\u304a\u304d\u307e\u3059\u3002
\n\u5f0f\uff08expression\uff09\u306f\u7d50\u679c\u3068\u306a\u308b\u5024\u3092\u8fd4\u3059\u3082\u306e\u3067\u3001\u6587\uff08statement\uff09\u306f\u5024\u3092\u8fd4\u3057\u307e\u305b\u3093\u3002
\n\u5f0f\u306e\u672b\u5c3e\u306b\u30bb\u30df\u30b3\u30ed\u30f3\u3092\u52a0\u3048\u308b\u3068\u6587\u306b\u306a\u308b\u306e\u3067\u3001\u5f0f\u306b\u306f\u30bb\u30df\u30b3\u30ed\u30f3\u3092\u3064\u3051\u306a\u3044\u306e\u3067\u3059\u3002
\nRust\u306b\u306f\u5f0f\u3068\u306a\u308b\u3082\u306e\u304c\u591a\u304f\u3042\u308a\u3001\u5f0f\u306e\u8a55\u4fa1\u5024\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5909\u6570\u306b\u4ee3\u5165\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\/\/ \u30d6\u30ed\u30c3\u30af\u3082\u5f0f\u306a\u306e\u3067\u3001x\u306b4\u304c\u4ee3\u5165\u3055\u308c\u307e\u3059<\/span>\r\nlet<\/span> x<\/span> =<\/span> {<\/span>\r\n    let<\/span> a<\/span> =<\/span> 2<\/span>;<\/span>\r\n    a<\/span> *<\/span> a<\/span>\r\n}<\/span>\r\n\r\n\/\/ if\u3082\u5168\u4f53\u3068\u3057\u3066\u5f0f\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u3067\u3001n\u307e\u305f\u306f-n\u304c\u623b\u308a\u5024\u3068\u3057\u3066\u8fd4\u3055\u308c\u307e\u3059<\/span>\r\nfn<\/span> abs<\/span>(<\/span>n<\/span>:<\/span> i32<\/span>)<\/span> -><\/span> i32<\/span> {<\/span>\r\n    if<\/span> n<\/span> >=<\/span> 0<\/span> {<\/span>\r\n        n<\/span>\r\n    }<\/span> else<\/span> {<\/span>\r\n        -<\/span>n<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\n\/\/ if\u5f0f\u3092\u4e09\u9805\u6f14\u7b97\u5b50\u306e\u3088\u3046\u306b\u4f7f\u3046\u3053\u3068\u3082\u3067\u304d\u307e\u3059\uff08Rust\u306b\u5c02\u7528\u306e\u4e09\u9805\u6f14\u7b97\u5b50\u306f\u3042\u308a\u307e\u305b\u3093\uff09<\/span>\r\nlet<\/span> n<\/span> =<\/span> if<\/span> n<\/span> >=<\/span> 0<\/span> {<\/span> n<\/span> }<\/span> else<\/span> {<\/span> -<\/span>n<\/span> };<\/span>\r\n\r\n\/\/ loop\u5f0f\u306f\u7279\u6b8a\u3067\u3001break\u306b\u6e21\u3057\u305f\u6570\u5024\u3092\u8fd4\u3057\u307e\u3059<\/span>\r\nlet<\/span> a<\/span> =<\/span> loop<\/span> {<\/span>\r\n    break<\/span> 3<\/span>;<\/span>\r\n};<\/span>\r\n\r\n\/\/ match\u3082\u5f0f\u3068\u3057\u3066\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002<\/span>\r\nlet<\/span> n<\/span> =<\/span> 1<\/span>;<\/span>\r\nlet<\/span> x<\/span> =<\/span> match<\/span> n<\/span> {<\/span>\r\n    0<\/span> =><\/span> 1<\/span>,<\/span>\r\n    _<\/span> =><\/span> 0<\/span>,<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
\u3053\u306e\u3088\u3046\u306b\u5f0f\u3068\u6587\u3092\u533a\u5225\u3057\u3001\u69d8\u3005\u306a\u3082\u306e\u304c\u5f0f\u3068\u306a\u308bRust\u306f\u5f0f\u6307\u5411\u8a00\u8a9e\u3068\u3082\u547c\u3070\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
5. \u304a\u307e\u3058\u306a\u3044\u6271\u3044\u3055\u308c\u308bunwrap<\/h3>\n
\u6a19\u6e96\u5165\u529b\u3092\u53d7\u3051\u4ed8\u3051\u308b\u30b3\u30fc\u30c9\u3092\u66f8\u3053\u3046\u3068\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u63a2\u3059\u3068unwrap\u3068\u3044\u3046\u30e1\u30bd\u30c3\u30c9\u306b\u51fa\u304f\u308f\u3059\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n
let<\/span> mut<\/span> line<\/span> =<\/span> String<\/span>::<\/span>new<\/span>();<\/span>\r\nstd<\/span>::<\/span>io<\/span>::<\/span>stdin<\/span>()<\/span>.read_line<\/span>(<\/span>&<\/span>mut<\/span> line<\/span>)<\/span>.unwrap<\/span>();<\/span>\r\nlet<\/span> n<\/span>:<\/span> i64<\/span> =<\/span> line<\/span>.trim<\/span>()<\/span>.parse<\/span>()<\/span>.unwrap<\/span>();<\/span>\r\n<\/code><\/pre>\n
\u3053\u308c\u306f\u6a19\u6e96\u5165\u529b\u3067\u5165\u529b\u3055\u308c\u305f\u6587\u5b57\u5217\u3092\u6570\u5024\u3068\u3057\u3066\u89e3\u91c8\u3059\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u3059\u3002
\n\u3072\u3068\u307e\u305a\u304a\u307e\u3058\u306a\u3044\u3068\u3057\u3066unwrap\u95a2\u6570\u3092\u547c\u3073\u51fa\u3057\u3066\u304a\u3051\u3070\u3046\u307e\u304f\u3044\u304f\u306e\u3067\u3059\u304c\u3001\u306a\u305c\u3053\u308c\u304c\u5fc5\u8981\u306a\u306e\u3067\u3057\u3087\u3046\u304b\uff1f
\n\u305d\u308c\u306fread_line\u3084parse\u304c\u3001\u672c\u6765\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u5fc5\u8981\u3068\u3059\u308b\u95a2\u6570\u3060\u304b\u3089\u3067\u3059\u3002
\nread_line\u3067\u306f\u6a19\u6e96\u5165\u529b\u306e\u53d7\u3051\u53d6\u308a\u306b\u5931\u6557\u3059\u308b\u53ef\u80fd\u6027\u3001\u305d\u3057\u3066parse\u3067\u306f\u5165\u529b\u3055\u308c\u305f\u5024\u304c\u6570\u5024\u306b\u5909\u63db\u3067\u304d\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002
\n\u305d\u306e\u305f\u3081read_line\u95a2\u6570\u3082parse\u95a2\u6570\u3082\u3001\u6210\u529f\u3057\u305f\u5834\u5408\u306f\u305d\u306e\u5024\u3092\u3001\u5931\u6557\u3057\u305f\u5834\u5408\u306f\u30a8\u30e9\u30fc\u5185\u5bb9\u3092\u8fd4\u3059\u306e\u3067\u3059\u3002\uff08\u5177\u4f53\u7684\u306b\u306fResult\u578b\u3068\u3044\u3046enum\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002\uff09
\n\u3057\u305f\u304c\u3063\u3066\u3072\u3068\u307e\u305a\u6210\u529f\u3059\u308b\u5834\u5408\u3060\u3051\u3092\u60f3\u5b9a\u3057\u3001\u30a8\u30e9\u30fc\u51e6\u7406\u306f\u7701\u7565\u3057\u305f\u3044\u3068\u3044\u3046\u5834\u5408\u306bunwrap\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002
\nunwrap\u95a2\u6570\u306f\u6b63\u5e38\u306a\u5834\u5408\u306f\u305d\u306e\u5024\u3092\u8fd4\u3057\u3001\u30a8\u30e9\u30fc\u3060\u3063\u305f\u5834\u5408\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5f37\u5236\u7d42\u4e86\u3059\u308b\u3068\u3044\u3046\u95a2\u6570\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002
\nResult\u578b\u3068unwrap\u95a2\u6570\u306e\u4e2d\u8eab\u306f\uff08\u5b9f\u8cea\u7684\u306b\u306f\uff09\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3067\u8868\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n
pub<\/span> enum<\/span> Result<\/span><<\/span>T<\/span>,<\/span> E<\/span>><\/span> {<\/span>\r\n    Ok<\/span>(<\/span>T<\/span>),<\/span>\r\n    Err<\/span>(<\/span>E<\/span>),<\/span>\r\n}<\/span>\r\n\r\nimpl<\/span><<\/span>T<\/span>,<\/span> E<\/span>:<\/span> fmt<\/span>::<\/span>Debug<\/span>><\/span> Result<\/span><<\/span>T<\/span>,<\/span> E<\/span>><\/span> {<\/span>\r\n    pub<\/span> fn<\/span> unwrap<\/span>(<\/span>self<\/span>)<\/span> -><\/span> T<\/span> {<\/span>\r\n        match<\/span> self<\/span> {<\/span>\r\n            Ok<\/span>(<\/span>t<\/span>)<\/span> =><\/span> t<\/span>,<\/span>\r\n            Err<\/span>(<\/span>e<\/span>)<\/span> =><\/span> panic!<\/span>(<\/span>\u203b\u3053\u3053\u306be<\/span>\u3092\u542b\u3080\u30e1\u30c3\u30bb\u30fc\u30b8),<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u3061\u306a\u307f\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306aOption\u578b\u306b\u3082unwrap\u95a2\u6570\u304c\u3042\u308a\u3001None\u304c\u8fd4\u3055\u308c\u305f\u3089panic\u3001\u6b63\u5e38\u306a\u5024\u304c\u8fd4\u3055\u308c\u305f\u3089\u305d\u306e\u5024\u3092\u8fd4\u3059\u3068\u3044\u3046\u3001\u540c\u3058\u3088\u3046\u306a\u52d5\u4f5c\u3092\u3057\u307e\u3059\u3002<\/p>\n
pub<\/span> enum<\/span> Option<\/span><<\/span>T<\/span>><\/span> {<\/span>\r\n    None<\/span>,<\/span>\r\n    Some<\/span>(<\/span>T<\/span>),<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u3082\u3061\u308d\u3093\u30d7\u30ed\u30c0\u30af\u30b7\u30e7\u30f3\u306b\u30ea\u30ea\u30fc\u30b9\u3059\u308b\u30b3\u30fc\u30c9\u3067\u5b9f\u884c\u6642\u30a8\u30e9\u30fc\u3092\u7121\u8996\u3067\u304d\u306a\u3044\u5834\u5408\u306f\u3001unwrap\u95a2\u6570\u306f\u4f7f\u308f\u305a\u306b\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u5b9f\u88c5\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\n\u203b\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u66f8\u304d\u65b9\u306b\u3064\u3044\u3066\u306f\u4ee5\u4e0b\u306e\u8a18\u4e8b\u304c\u5206\u304b\u308a\u3084\u3059\u3044\u3067\u3059\u3002\uff08\u3053\u3053\u3067\u306f\u89e6\u308c\u3066\u307e\u305b\u3093\u304c\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3067\u4fbf\u5229\u306a?\u6f14\u7b97\u5b50\u306b\u3064\u3044\u3066\u3082\u8aac\u660e\u3055\u308c\u3066\u3044\u307e\u3059\u3002\uff09
\n“Rust \u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306f\u30b7\u30f3\u30bf\u30c3\u30af\u30b9\u30b7\u30e5\u30ac\u30fc\u304c\u8c4a\u5bcc\u3067\u5b8c\u5168\u306b\u521d\u898b\u6bba\u3057\u306a\u306e\u3067\u81ea\u4fe1\u3092\u6301\u3063\u3066\u4f7f\u3048\u308b\u3088\u3046\u306b\u6574\u7406\u3057\u3066\u307f\u305f\u3089\u5b8c\u5168\u306b\u7406\u89e3\u3057\u305f”<\/p>\n
\u3057\u304b\u3057\u306a\u305cRust\u306f\u3053\u306e\u3088\u3046\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u8981\u6c42\u3059\u308b\u306e\u3067\u3057\u3087\u3046\u304b\uff1f
\n\u305d\u308c\u306fRust\u304c\u4f8b\u5916\u3082null\u3082\u6301\u305f\u306a\u3044\u304b\u3089\u3067\u3059\u3002
\nJava\u3092\u4f7f\u3063\u305f\u3053\u3068\u306e\u3042\u308b\u4eba\u3067\u3042\u308c\u3070\u3001null\u5024\u304b\u3089\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u3092\u884c\u3063\u3066\u610f\u56f3\u3057\u306a\u3044NullPointerException\u304c\u767a\u751f\u3057\u305f\u308a\u3001\u4f8b\u5916\u306ecatch\u304c\u6f0f\u308c\u3066\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u843d\u3061\u3066\u3057\u307e\u3063\u305f\u308a\u3057\u305f\u7d4c\u9a13\u304c\u3042\u308b\u3068\u601d\u3044\u307e\u3059\u3002
\nRust\u306f\u3053\u306e\u3088\u3046\u306a\u4e0d\u5177\u5408\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u9632\u6b62\u3059\u308b\u305f\u3081\u3001Result\u578b\u3084Option\u578b\u3092\u7528\u610f\u3057\u3066\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u5f37\u5236\u3057\u3066\u3044\u308b\u306e\u3067\u3059\u3002
\n\u305d\u306e\u305f\u3081unwrap\u306f\u672c\u6765\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u7121\u8996\u3057\u3066\u30a8\u30e9\u30fc\u304c\u8d77\u304d\u305f\u3089\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5f37\u5236\u7d42\u4e86\u3059\u308b\u3068\u3044\u3046\u30ea\u30b9\u30af\u306e\u3042\u308b\u66f8\u304d\u65b9\u306a\u306e\u3067\u3059\u304c\u3001unwrap\u3068\u3044\u3046\u95a2\u6570\u547c\u3073\u51fa\u3057\u304c\u3042\u308b\u3053\u3068\u3067\u305d\u306e\u30ea\u30b9\u30af\u3092\u660e\u793a\u3057\u3066\u3044\u308b\u3068\u3044\u3048\u307e\u3059\u3002
\n\u305d\u3057\u3066unwrap\u306e\u610f\u5473\u3092\u7406\u89e3\u3057unwrap\u3092\u4f7f\u308f\u306a\u3044\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u66f8\u304f\u306b\u306f\u4ee5\u4e0b\u306b\u7d9a\u304f2\u9805\u76ee\u306b\u3064\u3044\u3066\u306e\u7406\u89e3\u304c\u8981\u6c42\u3055\u308c\u308b\u305f\u3081\u3001\u521d\u5fc3\u8005\u306b\u5411\u3051\u305f\u60c5\u5831\u3067\u306funwrap\u306f\u304a\u307e\u3058\u306a\u3044\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002<\/p>\n
6. \u8907\u6570\u306e\u578b\u3092\u6301\u3064enum<\/h3>\n
Rust\u306eenum\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u305d\u308c\u305e\u308c\u306e\u5217\u6319\u5b50\u304c\u7570\u306a\u308b\u578b\u306e\u5024\u3092\u6301\u3064\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
#[derive(Debug)]<\/span> \/\/ println\u30de\u30af\u30ed\u3067\u30c7\u30d0\u30c3\u30b0\u51fa\u529b\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u30a2\u30c8\u30ea\u30d3\u30e5\u30fc\u30c8<\/span>\r\nenum<\/span> Foo<\/span> {<\/span>\r\n    A<\/span>(<\/span>i32<\/span>),<\/span>\r\n    B<\/span>(<\/span>String<\/span>),<\/span>\r\n    C<\/span>(<\/span>Vec<\/span><<\/span>i32<\/span>><\/span>),<\/span>\r\n    D<\/span> {<\/span> x<\/span>:<\/span> f64<\/span>,<\/span> y<\/span>:<\/span> f64<\/span> }<\/span>\r\n}<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> a<\/span> =<\/span> Foo<\/span>::<\/span>A<\/span>(<\/span>10<\/span>);<\/span>\r\n    let<\/span> b<\/span> =<\/span> Foo<\/span>::<\/span>B<\/span>(<\/span>String<\/span>::<\/span>from<\/span>(<\/span>\"foo\"<\/span>));<\/span>\r\n    let<\/span> c<\/span> =<\/span> Foo<\/span>::<\/span>C<\/span>(<\/span>vec!<\/span>[<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>]);<\/span>\r\n    let<\/span> d<\/span> =<\/span> Foo<\/span>::<\/span>D<\/span> {<\/span>x<\/span>:<\/span> 0.1<\/span>,<\/span> y<\/span>:<\/span> 0.2<\/span>};<\/span>\r\n    println!<\/span>(<\/span>\"{:?}\"<\/span>,<\/span> a<\/span>);<\/span> \/\/ A(10)<\/span>\r\n    println!<\/span>(<\/span>\"{:?}\"<\/span>,<\/span> b<\/span>);<\/span> \/\/ B(\"foo\")<\/span>\r\n    println!<\/span>(<\/span>\"{:?}\"<\/span>,<\/span> c<\/span>);<\/span> \/\/ C([1, 2, 3])<\/span>\r\n    println!<\/span>(<\/span>\"{:?}\"<\/span>,<\/span> d<\/span>);<\/span> \/\/ D { x: 0.1, y: 0.2 }<\/span>\r\n    let<\/span> v<\/span> =<\/span> vec!<\/span>[<\/span>a<\/span>,<\/span> b<\/span>,<\/span> c<\/span>,<\/span> d<\/span>];<\/span> \/\/ Vec<Foo>\u3068\u3057\u3066\u683c\u7d0d\u3067\u304d\u308b<\/span>\r\n    println!<\/span>(<\/span>\"{:?}\"<\/span>,<\/span> v<\/span>);<\/span> \/\/ [A(10), B(\"foo\"), C([1, 2, 3]), D { x: 0.1, y: 0.2 }]<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u3053\u308c\u306f\u6700\u521d\u898b\u305f\u3068\u304d\u306b\u304b\u306a\u308a\u9a5a\u304f\u3068\u601d\u3044\u307e\u3059\u3002
\n\u3057\u304b\u3082\u7570\u306a\u308b\u578b\u306e\u5024\u3092\u6301\u3064\u5217\u6319\u5b50\u306f\u307e\u3068\u3081\u3066\u30d9\u30af\u30bf\u306b\u683c\u7d0d\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002
\n\u305f\u3060\u3057\u3001enum\u306e\u5024\u306f\u3069\u306e\u5217\u6319\u5b50\u3092\u4fdd\u6301\u3057\u3066\u3044\u308b\u304b\u306etag\u9818\u57df\u306b8\u30d0\u30a4\u30c8\u4f7f\u7528\u3059\u308b\u4e0a\u3001\u30c7\u30fc\u30bf\u9818\u57df\u306f\u5217\u6319\u5b50\u306e\u3046\u3061\u6700\u3082\u5927\u304d\u3044\u578b\u306b\u5408\u308f\u305b\u3089\u308c\u308b\u305f\u3081\u3001\u30e1\u30e2\u30ea\u6d88\u8cbb\u306f\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u3002
\n\u305f\u3060\u3001\u7570\u306a\u308b\u578b\u306e\u5024\u3092\u4e00\u7dd2\u306b\u6271\u3048\u308b\u3068\u3044\u3046\u5229\u4fbf\u6027\u306f\u5927\u304d\u3044\u3067\u3059\u306d\u3002
\n\u5148\u307b\u3069\u306e\u9805\u76ee\u3067\u767b\u5834\u3057\u305fResult\u3084Option\u3082\u305d\u306e\u6700\u305f\u308b\u4f8b\u3060\u3068\u3044\u3048\u307e\u3059\u3002<\/p>\n
7. \u4f55\u304c\u8d77\u304d\u3066\u3044\u308b\u306e\u304b\u5206\u304b\u308a\u3065\u3089\u3044if let<\/h3>\n
\u5148\u307b\u3069\u751f\u6210\u3057\u305fenum\u306e\u5024\u3092\u53d6\u308a\u51fa\u3057\u305f\u3044\u6642\u3001\u3069\u306e\u3088\u3046\u306b\u3059\u308c\u3070\u826f\u3044\u3067\u3057\u3087\u3046\u304b\uff1f
\n\u4ee5\u4e0b\u306e\u3088\u3046\u306bif let\u3092\u4f7f\u3046\u3068\u7c21\u5358\u3067\u3059\u304c\u3001\u521d\u898b\u3067\u306f\u7406\u89e3\u3057\u3065\u3089\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n
let<\/span> a<\/span> =<\/span> Foo<\/span>::<\/span>A<\/span>(<\/span>10<\/span>);<\/span>\r\nlet<\/span> b<\/span> =<\/span> Foo<\/span>::<\/span>B<\/span>(<\/span>String<\/span>::<\/span>from<\/span>(<\/span>\"foo\"<\/span>));<\/span>\r\nlet<\/span> c<\/span> =<\/span> Foo<\/span>::<\/span>C<\/span>(<\/span>vec!<\/span>[<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>]);<\/span>\r\nlet<\/span> d<\/span> =<\/span> Foo<\/span>::<\/span>D<\/span> {<\/span>x<\/span>:<\/span> 0.1<\/span>,<\/span> y<\/span>:<\/span> 0.2<\/span>};<\/span>\r\n\r\nif<\/span> let<\/span> Foo<\/span>::<\/span>A<\/span>(<\/span>n<\/span>)<\/span> =<\/span> a<\/span> {<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> n<\/span>);<\/span> \/\/ 10<\/span>\r\n}<\/span>\r\nif<\/span> let<\/span> Foo<\/span>::<\/span>B<\/span>(<\/span>s<\/span>)<\/span> =<\/span> b<\/span> {<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> s<\/span>);<\/span> \/\/ foo<\/span>\r\n}<\/span>\r\nif<\/span> let<\/span> Foo<\/span>::<\/span>C<\/span>(<\/span>v<\/span>)<\/span> =<\/span> c<\/span> {<\/span>\r\n    println!<\/span>(<\/span>\"{}, {}, {}\"<\/span>,<\/span> v<\/span>[<\/span>0<\/span>],<\/span> v<\/span>[<\/span>1<\/span>],<\/span> v<\/span>[<\/span>2<\/span>]);<\/span> \/\/ 1, 2, 3<\/span>\r\n}<\/span>\r\nif<\/span> let<\/span> Foo<\/span>::<\/span>D<\/span> {<\/span>x<\/span>,<\/span> y<\/span>}<\/span> =<\/span> d<\/span> {<\/span> \/\/ {x, y}\u306f{x: x, y: y}\u306e\u7701\u7565\u8a18\u6cd5<\/span>\r\n    println!<\/span>(<\/span>\"{}, {}\"<\/span>,<\/span> x<\/span>,<\/span> y<\/span>);<\/span> \/\/ 0.1, 0.2<\/span>\r\n}<\/span>\r\nif<\/span> let<\/span> Foo<\/span>::<\/span>A<\/span>(<\/span>n<\/span>)<\/span> =<\/span> d<\/span> {<\/span> \/\/ d\u306fFoo::D\u306a\u306e\u3067Foo::A\u306b\u306f\u30de\u30c3\u30c1\u3057\u306a\u3044<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> n<\/span>);<\/span> \/\/ \u3053\u308c\u306fif\u6587\u304c\u6210\u7acb\u305b\u305a\u3001\u5b9f\u884c\u3055\u308c\u306a\u3044<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4e00\u756a\u4e0a\u306eif let\u306f\u5909\u6570n\u3092\u5ba3\u8a00\u3057\u3066a\u306e\u5024\u3067\u521d\u671f\u5316\u3057\u3066\u3044\u307e\u3059\u3002
\n\u306a\u305cif\u304c\u3064\u3044\u3066\u3044\u308b\u306e\u304b\u3068\u3044\u3046\u3068\u3001a\u304cFoo::A(n)\u3068\u3044\u3046\u30d1\u30bf\u30fc\u30f3\u306b\u5408\u81f4\u3059\u308b\u5834\u5408\u306e\u307f\u5909\u6570n\u304c\u6709\u52b9\u3068\u306a\u308b\u304b\u3089\u3067\u3059\u3002
\n\u4e00\u756a\u6700\u5f8c\u306eif let\u306fd\u304cFoo::D\u306a\u306e\u3067Foo::A\u306b\u306f\u30de\u30c3\u30c1\u305b\u305a\u3001\u3053\u306eif\u5f0f\u306f\u5b9f\u884c\u3055\u308c\u307e\u305b\u3093\u3002
\n\u3055\u3066\u3001\u305d\u3082\u305d\u3082let Foo::A(n) = a\u3068\u3044\u3046\u8a18\u8ff0\u304c\u521d\u898b\u3067\u306f\u5909\u6570n\u306e\u521d\u671f\u5316\u306b\u306f\u898b\u3048\u306a\u3044\u3068\u601d\u3044\u307e\u3059\u3002
\n\u3053\u308c\u306fRust\u306e\u30c7\u30b9\u30c8\u30e9\u30af\u30c8\uff08destructuring\uff09\u3068\u3044\u3046\u6a5f\u80fd\u3067\u3059\u3002
\n\u5b9f\u306fRust\u3067\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5909\u6570\u3092\u521d\u671f\u5316\uff08\u5909\u6570\u306b\u5024\u3092\u675f\u7e1b\uff09\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
struct<\/span> Buzz<\/span> {<\/span> t<\/span>:<\/span> f64<\/span>,<\/span> u<\/span>:<\/span> f64<\/span> }<\/span>\r\nstruct<\/span> Bar<\/span> {<\/span> x<\/span>:<\/span> f64<\/span>,<\/span> y<\/span>:<\/span> Buzz<\/span> }<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> [<\/span>a<\/span>,<\/span> b<\/span>,<\/span> c<\/span>]<\/span> =<\/span> [<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>];<\/span> \/\/ \u30c7\u30b9\u30c8\u30e9\u30af\u30c8\uff08destructuring\uff09<\/span>\r\n    println!<\/span>(<\/span>\"{}, {}, {}\"<\/span>,<\/span> a<\/span>,<\/span> b<\/span>,<\/span> c<\/span>);<\/span> \/\/ 1, 2, 3<\/span>\r\n\r\n    let<\/span> (<\/span>n<\/span>,<\/span> s<\/span>)<\/span> =<\/span> (<\/span>10<\/span>,<\/span> \"foo\"<\/span>);<\/span> \/\/ \u30c7\u30b9\u30c8\u30e9\u30af\u30c8\uff08destructuring\uff09<\/span>\r\n    println!<\/span>(<\/span>\"{}, {}\"<\/span>,<\/span> n<\/span>,<\/span> s<\/span>);<\/span> \/\/ 10, foo<\/span>\r\n\r\n    let<\/span> bar<\/span> =<\/span> Bar<\/span> {<\/span> x<\/span>:<\/span> 0.1<\/span>,<\/span> y<\/span>:<\/span> Buzz<\/span> {<\/span>t<\/span>:<\/span> 0.2<\/span>,<\/span> u<\/span>:<\/span> 0.3<\/span>}<\/span> };<\/span>\r\n    let<\/span> Bar<\/span> {<\/span> x<\/span>,<\/span> y<\/span>:<\/span> Buzz<\/span> {<\/span> t<\/span>,<\/span> u<\/span> }<\/span> }<\/span> =<\/span> bar<\/span>;<\/span> \/\/ \u30c7\u30b9\u30c8\u30e9\u30af\u30c8\uff08destructuring\uff09<\/span>\r\n    println!<\/span>(<\/span>\"{}, {}, {}\"<\/span>,<\/span> x<\/span>,<\/span> t<\/span>,<\/span> u<\/span>);<\/span> \/\/ 0.1, 0.2, 0.3<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u3053\u308c\u306f\u5909\u6570\u306b\u5024\u3092\u675f\u7e1b\u3059\u308b\u6642\u306b\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u3092\u4f7f\u7528\u3067\u304d\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002
\n\u305d\u3057\u3066Rust\u3067\u306f\u3053\u306e\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u306b\u3088\u308b\u5909\u6570\u306e\u675f\u7e1b\u3092match\u3084\u5404\u7a2e\u30eb\u30fc\u30d7\u3001\u95a2\u6570\u5f15\u6570\u306a\u3069\u69d8\u3005\u306a\u7b87\u6240\u3067\u5229\u7528\u3067\u304d\u307e\u3059\u3002
\n\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u306b\u3064\u3044\u3066\u306f”Rust\u306e\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u3092\u5b8c\u5168\u306b\u7406\u89e3\u3057\u305f”\u3068\u3044\u3046\u8a18\u4e8b\u304c\u5206\u304b\u308a\u3084\u3059\u3044\u3067\u3059\u3002<\/p>\n
\u6700\u5f8c\u306b\u3001if let\u306fOption\u578b\u3084Result\u578b\u3092\u4f7f\u7528\u3057\u305f\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3067\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002
\nenum\u3068if let\u3092\u7406\u89e3\u3057\u306a\u3044\u3068unwrap\u3092\u4f7f\u308f\u306a\u3044\u30d1\u30bf\u30fc\u30f3\u3092\u66f8\u3051\u306a\u3044\u306e\u306f\u521d\u5fc3\u8005\u306b\u306f\u3057\u3093\u3069\u3044\u3067\u3059\u306d\u3002\uff08unwrap\u304c\u304a\u307e\u3058\u306a\u3044\u5316\u3057\u3066\u3057\u307e\u3046\u539f\u56e0\u3067\u3059\uff09<\/p>\n
fn<\/span> foo<\/span>()<\/span> {<\/span>\r\n    let<\/span> mut<\/span> line<\/span> =<\/span> String<\/span>::<\/span>new<\/span>();<\/span>\r\n    let<\/span> result<\/span> =<\/span> std<\/span>::<\/span>io<\/span>::<\/span>stdin<\/span>()<\/span>.read_line<\/span>(<\/span>&<\/span>mut<\/span> line<\/span>);<\/span>\r\n    if<\/span> let<\/span> Err<\/span>(<\/span>e<\/span>)<\/span> =<\/span> result<\/span> {<\/span>\r\n        println!<\/span>(<\/span>\"{:?}\"<\/span>,<\/span> e<\/span>);<\/span>\r\n        return<\/span>;<\/span>\r\n    }<\/span>\r\n    if<\/span> let<\/span> Ok<\/span>(<\/span>n<\/span>)<\/span> =<\/span> line<\/span>.trim<\/span>()<\/span>.parse<\/span>::<\/span><<\/span>i64<\/span>><\/span>()<\/span> {<\/span>\r\n        println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> n<\/span>);<\/span>\r\n    }<\/span> else<\/span> {<\/span>\r\n        println!<\/span>(<\/span>\"Please input an integer\"<\/span>)<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
8. \u5148\u982d\u306b\u3042\u308b\u4e0d\u601d\u8b70\u306a\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\uff08\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u6ce8\u91c8\u8a18\u6cd5\uff09<\/h3>\n
Rust\u3067\u306f’a\u3084’static\u306e\u3088\u3046\u306b\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\u3067\u59cb\u307e\u308b\u8a18\u6cd5\u3092\u3088\u304f\u898b\u304b\u3051\u308b\u306e\u3067\u3059\u304c\u3001\u666e\u901a\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\u306f\u6587\u5b57\u5217\u3092\u56f2\u3046\u3088\u3046\u306b2\u3064\u30bb\u30c3\u30c8\u3067\u4f7f\u3046\u306e\u3067\u9055\u548c\u611f\u3092\u611f\u3058\u308b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n
\/\/ 2\u3064\u306e\u6587\u5b57\u5217\u306e\u3046\u3061\u9577\u3044\u65b9\u3092\u8fd4\u3059\u95a2\u6570<\/span>\r\nfn<\/span> longest<\/span><<\/span>'a<\/span>><\/span>(<\/span>x<\/span>:<\/span> &<\/span>'a<\/span> str<\/span>,<\/span> y<\/span>:<\/span> &<\/span>'a<\/span> str<\/span>)<\/span> -><\/span> &<\/span>'a<\/span> str<\/span> {<\/span>\r\n    if<\/span> x<\/span>.len<\/span>()<\/span> ><\/span> y<\/span>.len<\/span>()<\/span> {<\/span>\r\n        x<\/span>\r\n    }<\/span> else<\/span> {<\/span>\r\n        y<\/span>\r\n    }<\/span>\r\n}<\/span> \/\/ The Rust Programming Language\u3088\u308a\u5f15\u7528<\/span>\r\n<\/code><\/pre>\n
\u3057\u304b\u3057\u3053\u306e\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\u306f\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u6ce8\u91c8\u3068\u3044\u3063\u3066Rust\u3067\u306f\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u3066\u3044\u308b\u6587\u6cd5\u306a\u306e\u3067\u3059\u3002
\n\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u3068\u306f\u540d\u524d\u304b\u3089\u60f3\u50cf\u3055\u308c\u308b\u901a\u308a\u3001\u5909\u6570\u306e\u5bff\u547d\uff08\u6b63\u78ba\u306b\u306f\u305d\u306e\u53c2\u7167\u304c\u6709\u52b9\u306b\u306a\u308b\u30b9\u30b3\u30fc\u30d7\u306e\u3053\u3068\uff09\u3092\u8868\u3057\u307e\u3059\u3002
\n\u305d\u3057\u3066Rust\u3067\u306f\u5bff\u547d\u304c\u5c3d\u304d\u3066\u3057\u307e\u3063\u305f\u5909\u6570\u3078\u306e\u53c2\u7167\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u691c\u51fa\u3059\u308b\u305f\u3081\u3001\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u3068\u3044\u3046\u6982\u5ff5\u304c\u5b58\u5728\u3057\u307e\u3059\u3002
\n\u30b3\u30fc\u30c9\u4f8b\u306b\u304a\u3051\u308b’a\u306f\u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u306a\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u5f15\u6570\u3067\u3001\u4e0e\u3048\u3089\u308c\u305f2\u3064\u306e\u5f15\u6570x, y\u306e\u3046\u3061\u77ed\u3044\u65b9\u306e\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u3092\u8868\u3057\u3001\u623b\u308a\u5024\u306f\u305d\u306e\u77ed\u3044\u65b9\u306e\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u3092\u6301\u3064\u3053\u3068\u3092\u793a\u3057\u307e\u3059\u3002
\n\u305d\u306e\u305f\u3081\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u306f\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002\uff08result\u306fstring2\u3088\u308a\u3082\u9577\u3044\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u3092\u6301\u3063\u3066\u3057\u307e\u3063\u3066\u3044\u308b\u305f\u3081\uff09<\/p>\n
let<\/span> string1<\/span> =<\/span> String<\/span>::<\/span>from<\/span>(<\/span>\"long string is long\"<\/span>);<\/span>\r\nlet<\/span> result<\/span>;<\/span>\r\n{<\/span>\r\n    let<\/span> string2<\/span> =<\/span> String<\/span>::<\/span>from<\/span>(<\/span>\"xyz\"<\/span>);<\/span>\r\n    \/\/ error[E0597]: `string2` does not live long enough<\/span>\r\n    result<\/span> =<\/span> longest<\/span>(<\/span>string1<\/span>.as_str<\/span>(),<\/span> string2<\/span>.as_str<\/span>());<\/span> \/\/ \u30a8\u30e9\u30fc\uff01\uff01<\/span>\r\n}<\/span>\r\nprintln!<\/span>(<\/span>\"The longest string is {}\"<\/span>,<\/span> result<\/span>);<\/span>\r\n\/\/ The Rust Programming Language\u3088\u308a\u5f15\u7528<\/span>\r\n<\/code><\/pre>\n
C++\u3067\u306f\u4e0a\u8a18\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u3082\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306f\u306a\u3089\u305a\u3001\u4eba\u9593\u304c\u6c17\u3065\u304b\u306a\u3044\u9650\u308a\u5b9f\u884c\u6642\u307e\u3067\u554f\u984c\u304c\u308f\u304b\u308a\u307e\u305b\u3093\u3002
\n\u305d\u306e\u4e0a\u3001\u6b63\u78ba\u306b\u306f\u672a\u5b9a\u7fa9\u52d5\u4f5c\u306a\u306e\u3067\u5fc5\u305a\u3057\u3082\u5b9f\u884c\u6642\u306b\uff08segmentation fault\u3067\uff09\u843d\u3061\u308b\u3068\u306f\u9650\u3089\u305a\u3001\u4f55\u3082\u8d77\u3053\u3089\u306a\u3044\u304b\u3082\u3057\u308c\u306a\u3044\u3057\u3001\u4f55\u304c\u8d77\u3053\u3063\u3066\u3082\u304a\u304b\u3057\u304f\u306a\u3044\u3068\u3044\u3046\u5384\u4ecb\u306a\u72b6\u6cc1\u306b\u306a\u308a\u307e\u3059\u3002
\n\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u6ce8\u91c8\u306f\u4e00\u898b\u9762\u5012\u306b\u898b\u3048\u307e\u3059\u3057\u3001\u5b9f\u969b\u8907\u96d1\u306a\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u304f\u3068\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u6ce8\u91c8\u5468\u308a\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u3076\u3064\u304b\u308a\u307e\u304f\u308b\u306e\u3067\u3059\u304c\u3001\u305d\u308c\u3067\u3082C++\u3067\u767a\u751f\u3059\u308b\u5b9f\u884c\u6642\u306e\u554f\u984c\u306e\u51f6\u60aa\u3055\u306b\u6bd4\u3079\u308c\u3070\u591a\u5c11\u9762\u5012\u306a\u66f8\u304d\u65b9\u306b\u306a\u3063\u3066\u3082\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3067\u77ef\u6b63\u3057\u3066\u304f\u308c\u308b\u65b9\u304c\u30de\u30b7\u3068\u3044\u3046\u8003\u3048\u65b9\u3067\u3059\u3002
\n\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u6ce8\u91c8\u306b\u3064\u3044\u3066\u306fC++\u7d4c\u9a13\u8005\u306a\u3089\u305d\u306e\u3042\u308a\u304c\u305f\u307f\u304c\u5206\u304b\u308b\u306e\u3067\u3059\u304c\u3001\u305d\u3046\u3067\u306a\u3044\u4eba\u306b\u3068\u3063\u3066\u306f\u3053\u306e\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u6ce8\u91c8\u304cRust\u5b66\u7fd2\u4e0a\u306e\u6700\u3082\u5927\u304d\u306a\u30cf\u30fc\u30c9\u30eb\u306b\u306a\u308b\u3068\u3044\u3063\u3066\u3082\u904e\u8a00\u3067\u306f\u306a\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n
\u6700\u5f8c\u306b’static\u3068\u3044\u3046\u6700\u9577\u306e\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u6ce8\u91c8\u306b\u89e6\u308c\u3066\u304a\u304d\u307e\u3059\u3002
\n\u305f\u3068\u3048\u3070let s = “foo”;\u3068\u3057\u305f\u3068\u304d\u306es\u306e\u578b\u306f\u3001\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u6ce8\u91c8\u3092\u7701\u7565\u3059\u308b\u3068&str\u3068\u306a\u308b\u306e\u3067\u3059\u304c\u3001\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u3092\u660e\u8a18\u3059\u308b\u3068&’static str\u3068\u306a\u308a\u307e\u3059\u3002
\n\u3053\u308c\u306f”foo”\u3068\u3044\u3046\u6587\u5b57\u5217\u30ea\u30c6\u30e9\u30eb\u3067\u751f\u6210\u3055\u308c\u305f\u5909\u6570s\u304c’static\u3068\u3044\u3046\u6700\u9577\u306e\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u3092\u6301\u3063\u3066\u3044\u308b\u305f\u3081\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u958b\u59cb\u6642\u304b\u3089\u7d42\u4e86\u6642\u307e\u3067\u305a\u3063\u3068\u751f\u304d\u7d9a\u3051\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002
\n\u3053\u306e\u3088\u3046\u306b\u6587\u5b57\u5217\u30ea\u30c6\u30e9\u30eb\u304c\u7834\u68c4\u3055\u308c\u305a\u306b\u305a\u3063\u3068\u751f\u304d\u7d9a\u3051\u308b\u3053\u3068\u306fC++\u3068\u5171\u901a\u3057\u3066\u3044\u308b\u70b9\u3067\u3059\u3002<\/p>\n
9. \u3044\u308d\u3044\u308d\u306a\u5834\u6240\u306b\u767b\u5834\u3059\u308b\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\uff08\u30a2\u30f3\u30c0\u30fc\u30d0\u30fc\uff09<\/h3>\n
Rust\u306b\u304a\u3044\u3066\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\u306f\u4f55\u304b\u3057\u3089\u306e\u3082\u306e\u3092\u7701\u7565\u3057\u305f\u308a\u3001\u7121\u8996\u3057\u305f\u308a\u3059\u308b\u610f\u5473\u3092\u6301\u3063\u3066\u304a\u308a\u3001\u69d8\u3005\u306a\u5229\u7528\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002
\n\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3067\u305d\u306e\u4e3b\u8981\u306a\u4f8b\u3092\u5217\u6319\u3057\u307e\u3059\u3002<\/p>\n
\/\/ \u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\u3067\u59cb\u307e\u308b\u5909\u6570\u306f\u4f7f\u7528\u3057\u306a\u304f\u3066\u3082\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306ewarning\u304c\u51fa\u306a\u304f\u306a\u308b<\/span>\r\nlet<\/span> _<\/span>a<\/span> =<\/span> \"a\"<\/span>;<\/span>\r\n\r\n\/\/ \u578b\u306e\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9<\/span>\r\n\/\/ let v = (1..4).collect(); \/\/ error[E0282]: type annotations needed<\/span>\r\nlet<\/span> v<\/span> =<\/span> (<\/span>1<\/span>..<\/span>4<\/span>)<\/span>.collect<\/span>::<\/span><<\/span>Vec<\/span><<\/span>_<\/span>>><\/span>();<\/span> \/\/ 1..4\u306fi32\u306a\u306e\u3067Vec\u3060\u3051\u6307\u5b9a\u3057\u305f\u3089OK<\/span>\r\nprintln!<\/span>(<\/span>\"{:?}\"<\/span>,<\/span> v<\/span>);<\/span>\r\n\r\n\/\/ match\u306e\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9<\/span>\r\nlet<\/span> a<\/span> =<\/span> 1<\/span>;<\/span>\r\nmatch<\/span> a<\/span> {<\/span>\r\n    0<\/span> =><\/span> println!<\/span>(<\/span>\"zero!\"<\/span>),<\/span>\r\n    _<\/span> =><\/span> println!<\/span>(<\/span>\"non zero!\"<\/span>)<\/span> \/\/ _\u306f0\u4ee5\u5916\u306e\u5168\u3066\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u6307\u3059<\/span>\r\n}<\/span>\r\nlet<\/span> b<\/span> =<\/span> (<\/span>1<\/span>,<\/span> 2<\/span>);<\/span>\r\nmatch<\/span> b<\/span> {<\/span>\r\n    (<\/span>_<\/span>,<\/span> n<\/span>)<\/span> =><\/span> println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> n<\/span>)<\/span> \/\/ \u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u306f\u90e8\u5206\u7684\u306b\u4f7f\u3046\u3053\u3068\u3082\u53ef\u80fd<\/span>\r\n}<\/span>\r\nlet<\/span> (<\/span>_<\/span>,<\/span> n<\/span>)<\/span> =<\/span> b<\/span>;<\/span> \/\/ \uff08match\u3068\u540c\u3058\u304f\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u306a\u306e\u3067\uff09\u30c7\u30b9\u30c8\u30e9\u30af\u30c8\u3059\u308b\u969b\u306b\u3082\u4f7f\u7528\u53ef\u80fd<\/span>\r\nprintln!<\/span>(<\/span>\"{}\"<\/span>,<\/span> n<\/span>);<\/span> \/\/ 2<\/span>\r\n\r\n\/\/ \u6570\u5024\u306e\u533a\u5207\u308a\u6587\u5b57<\/span>\r\nlet<\/span> n1<\/span> =<\/span> 1_000_000<\/span>;<\/span> \/\/ _\u306f\u5358\u306b\u898b\u305f\u76ee\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u3059\u308b\u305f\u3081\u306e\u533a\u5207\u308a\u3067\u7121\u8996\u3055\u308c\u308b<\/span>\r\nlet<\/span> n2<\/span> =<\/span> 0b1000_0010<\/span>;<\/span> \/\/ 0b\u306f2\u9032\u6570\u306e\u63a5\u982d\u8f9e\u3067\u30014bit\u6bce\u306b\u533a\u5207\u3063\u3066\u898b\u3084\u3059\u304f\u3057\u3066\u3044\u308b<\/span>\r\nprintln!<\/span>(<\/span>\"{}, {}\"<\/span>,<\/span> n1<\/span>,<\/span> n2<\/span>);<\/span> \/\/ 1000000, 130<\/span>\r\n\r\n\/\/ for\u30eb\u30fc\u30d7\u3067map\u306e\u5024\u306e\u307f\u3092\u4f7f\u3046<\/span>\r\nuse<\/span> std<\/span>::<\/span>collections<\/span>::<\/span>HashMap<\/span>;<\/span>\r\nlet<\/span> mut<\/span> map<\/span>:<\/span> HashMap<\/span><<\/span>String<\/span>,<\/span> String<\/span>><\/span> =<\/span> HashMap<\/span>::<\/span>new<\/span>();<\/span>\r\nmap<\/span>.insert<\/span>(<\/span>String<\/span>::<\/span>from<\/span>(<\/span>\"key\"<\/span>),<\/span> String<\/span>::<\/span>from<\/span>(<\/span>\"value\"<\/span>));<\/span>\r\nfor<\/span> (<\/span>_<\/span>,<\/span> value<\/span>)<\/span> in<\/span> map<\/span> {<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> value<\/span>);<\/span>\r\n}<\/span>\r\n\r\n\/\/ as\u3067\u578b\u63a8\u5b9a\u306b\u4efb\u305b\u308b<\/span>\r\nlet<\/span> f<\/span> =<\/span> 0.1<\/span>;<\/span> \/\/ f64<\/span>\r\nlet<\/span> mut<\/span> n<\/span> =<\/span> 0<\/span>;<\/span> \/\/ i32<\/span>\r\n\/\/ n = f; \/\/ error[E0308]: mismatched types<\/span>\r\nn<\/span> =<\/span> f<\/span> as<\/span> _<\/span>;<\/span> \/\/ n = f as i32;\u3068\u578b\u63a8\u5b9a\u3057\u3066\u304f\u308c\u308b<\/span>\r\nprintln!<\/span>(<\/span>\"{}\"<\/span>,<\/span> n<\/span>);<\/span> \/\/ 1<\/span>\r\n<\/code><\/pre>\n
\u6700\u5f8c\u306b\u3001\u533f\u540d\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u3068\u3044\u3046\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002
\n\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u306e\u8a18\u8ff0\u3092\u7c21\u7d20\u5316\u3057\u305f\u308a\u3001\u53c2\u7167\u306e\u5b58\u5728\u3092\u660e\u78ba\u5316\u3059\u308b\u306a\u3069\u306e\u5f79\u5272\u3092\u6301\u3061\u307e\u3059\u3002<\/p>\n
struct<\/span> Foo<\/span><<\/span>'a<\/span>><\/span> {<\/span>\r\n    message<\/span>:<\/span> &<\/span>'a<\/span> str<\/span>\r\n}<\/span>\r\n\r\n\/\/ impl<'a> Foo<'a>\u306e\u7701\u7565\u5f62\u3002\u3053\u306eimpl\u30d6\u30ed\u30c3\u30af\u5185\u3067'a\u3092\u4e00\u5207\u4f7f\u308f\u306a\u3044\u5834\u5408\u306f\u697d<\/span>\r\nimpl<\/span> Foo<\/span><<\/span>'_<\/span>><\/span> {<\/span>\r\n    fn<\/span> foo<\/span>(<\/span>&<\/span>self<\/span>){<\/span>\r\n        println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> self<\/span>.message<\/span>);<\/span>\r\n    }<\/span>\r\n    \/\/ <'_>\u306b\u3088\u3063\u3066\u623b\u308a\u5024\u306eFoo\u69cb\u9020\u4f53\u304c\u4f55\u3089\u304b\u306e\u53c2\u7167\u3092\u6301\u3064\u3053\u3068\u3092\u660e\u793a\u3057\u3066\u3044\u308b\uff08Rust 2018\u3088\u308a\u63a8\u5968\u306e\u8a18\u6cd5\uff09<\/span>\r\n    fn<\/span> create<\/span>(<\/span>message<\/span>:<\/span> &<\/span>str<\/span>)<\/span> -><\/span> Foo<\/span><<\/span>'_<\/span>><\/span> {<\/span>\r\n        Foo<\/span> {<\/span> message<\/span> }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u533f\u540d\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u306b\u3064\u3044\u3066\u306e\u3088\u308a\u8a73\u3057\u3044\u5185\u5bb9\u306f\u4ee5\u4e0b\u306e\u8a18\u4e8b\u304c\u53c2\u8003\u306b\u306a\u308a\u307e\u3059\u3002
\n“\u3042\u306e\u65e5\u898b\u305f\u533f\u540d\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0”<\/p>\n
10. \u6df7\u4e71\u3059\u308b\u81ea\u52d5\u53c2\u7167\u3068\u53c2\u7167\u5916\u3057<\/h3>\n
Rust\u3067\u306f\u53c2\u7167\u306e\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u3092\u610f\u8b58\u3057\u306a\u304c\u3089\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u5fc5\u8981\u304c\u3042\u308b\u306e\u3067\u3001\u53c2\u7167\u3067\u3042\u308b\u3053\u3068\u3092\u660e\u8a18\u3059\u308b\u6587\u6cd5\u304c\u591a\u3044\u3067\u3059\u3002
\n\u305f\u3068\u3048\u3070C++\u3067\u306f\u95a2\u6570\u5f15\u6570\u304c\u53c2\u7167\u3067\u3042\u308b\u5834\u5408\u3067\u3082\u5909\u6570\u3092\u305d\u306e\u307e\u307e\u6e21\u305b\u307e\u3057\u305f\u304c\u3001Rust\u3067\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b&\u3092\u3064\u3051\u305f\u308a\u3001\u53c2\u7167\u3092\u5916\u3059\u305f\u3081\u306b*\u3092\u3064\u3051\u308b\u3053\u3068\u304c\u5fc5\u8981\u306b\u306a\u3063\u305f\u308a\u3057\u307e\u3059\u3002<\/p>\n
fn<\/span> foo<\/span>(<\/span>n<\/span>:<\/span> &<\/span>i32<\/span>)<\/span> {<\/span>\r\n    if<\/span> (<\/span>*<\/span>n<\/span> ==<\/span> 1<\/span>)<\/span> {<\/span> \/\/ n\u306f\u53c2\u7167\u306a\u306e\u3067*\u3067\u53c2\u7167\u5916\u3057\u3092\u3057\u3066i32\u578b\u306e\u5024\u3092\u53d6\u5f97\u3059\u308b<\/span>\r\n        println!<\/span>(<\/span>\"one!\"<\/span>);<\/span>\r\n    }<\/span> else<\/span> {<\/span>\r\n        println!<\/span>(<\/span>\"not one!\"<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> n<\/span> =<\/span> 1<\/span>;<\/span>\r\n    foo<\/span>(<\/span>&<\/span>n<\/span>);<\/span> \/\/ \u53c2\u7167\u6e21\u3057\u3092\u3059\u308b\u305f\u3081\u306b&\u3092\u3064\u3051\u308b<\/span>\r\n    foo<\/span>(<\/span>&<\/span>2<\/span>);<\/span> \/\/ \u540c\u4e0a<\/span>\r\n    let<\/span> mut<\/span> v<\/span> =<\/span> vec!<\/span>[<\/span>0<\/span>,<\/span> 1<\/span>,<\/span> 2<\/span>];<\/span>\r\n    for<\/span> i<\/span> in<\/span> &<\/span>mut<\/span> v<\/span> {<\/span>\r\n        *<\/span>i<\/span> +=<\/span> 1<\/span>;<\/span> \/\/ \u53ef\u5909\u53c2\u7167\u306b\u5bfe\u3059\u308b\u52a0\u7b97\u4ee3\u5165\u306b\u306f\u53c2\u7167\u5916\u3057\u304c\u5fc5\u8981<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u305f\u3060\u3057\u3001\u3055\u3059\u304c\u306b\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u306b\u307e\u3067\u3044\u3061\u3044\u3061&\u3092\u3064\u3051\u308b\u306e\u306f\u7169\u308f\u3057\u3044\u305f\u3081\u3001\u81ea\u52d5\u53c2\u7167\u3068\u3044\u3046\u6a5f\u80fd\u3067\u6697\u9ed9\u7684\u306b\u53c2\u7167\u3068\u3057\u3066\u6271\u3063\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n
struct<\/span> Foo<\/span> {}<\/span>\r\nimpl<\/span> Foo<\/span> {<\/span>\r\n    fn<\/span> foo<\/span>(<\/span>&<\/span>self<\/span>)<\/span> {<\/span>\r\n        println!<\/span>(<\/span>\"foo!\"<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> f<\/span> =<\/span> Foo<\/span> {};<\/span>\r\n    (<\/span>&<\/span>f<\/span>)<\/span>.foo<\/span>();<\/span> \/\/ foo\u306e\u5f15\u6570\u3067\u3042\u308bself\u304c\u53c2\u7167\u3067\u3042\u308b\u3053\u3068\u3092\u660e\u8a18\u3059\u308b\u66f8\u304d\u65b9<\/span>\r\n    f<\/span>.foo<\/span>();<\/span> \/\/ \u81ea\u52d5\u53c2\u7167\u6a5f\u80fd\u306b\u3088\u308b\u7701\u7565\u8a18\u6cd5\uff08\u666e\u901a\u306f\u3053\u3061\u3089\u306e\u66f8\u304d\u65b9\u3092\u63a1\u7528\uff09<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u9006\u306b\u3001\u5024\u3068\u53c2\u7167\u306e\u4e21\u65b9\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\u95a2\u6570\u3084\u6f14\u7b97\u5b50\u3067\u306f\u6697\u9ed9\u7684\u306b\u53c2\u7167\u304c\u5916\u3055\u308c\u308b\u3088\u3046\u306b\u898b\u3048\u307e\u3059\u3002<\/p>\n
fn<\/span> plus_one<\/span>(<\/span>n<\/span>:<\/span> &<\/span>i32<\/span>)<\/span> {<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> n<\/span> +<\/span> 1<\/span>);<\/span> \/\/ i32\u578b\u306e\u52a0\u7b97\u306f\u53c2\u7167\u5916\u3057\u306e\u5fc5\u8981\u7121\u3057<\/span>\r\n}<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> mut<\/span> v1<\/span> =<\/span> vec!<\/span>[<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>];<\/span>\r\n    let<\/span> mut<\/span> v2<\/span> =<\/span> vec!<\/span>[<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>];<\/span>\r\n    let<\/span> v1_ref<\/span> =<\/span> &<\/span>v1<\/span>;<\/span>\r\n    let<\/span> v2_ref<\/span> =<\/span> &<\/span>v2<\/span>;<\/span>\r\n    \/\/ \u30d9\u30af\u30bf\u306e\u7b49\u4fa1\u6bd4\u8f03\u6f14\u7b97\u5b50\u3067\u306f\u52dd\u624b\u306b\u53c2\u7167\u3092\u5916\u3057\u3066\u4e2d\u306e\u5024\u3092\u6bd4\u3079\u3066\u304f\u308c\u308b<\/span>\r\n    let<\/span> result<\/span> =<\/span> if<\/span> v1_ref<\/span> ==<\/span> v2_ref<\/span> {<\/span> \"equal\"<\/span> }<\/span> else<\/span> {<\/span> \"not equal\"<\/span> };<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> result<\/span>);<\/span> \/\/ equal<\/span>\r\n    \/\/ \u305f\u3060\u3057\u7247\u65b9\u3060\u3051\u53c2\u7167\u306e\u5834\u5408\u306f\u53c2\u7167\u5916\u3057\u304c\u5fc5\u8981<\/span>\r\n    let<\/span> result<\/span> =<\/span> if<\/span> *<\/span>v1_ref<\/span> ==<\/span> v2<\/span> {<\/span> \"equal\"<\/span> }<\/span> else<\/span> {<\/span> \"not equal\"<\/span> };<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> result<\/span>);<\/span> \/\/ equal<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u3053\u3053\u3089\u8fba\u306f\u5206\u304b\u308a\u3084\u3059\u3055\u3068\u5229\u4fbf\u6027\u306e\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\u304c\u3042\u3063\u3066\u6700\u521d\u306f\u6df7\u4e71\u3057\u307e\u3059\u306d\u3002
\n\u4ed6\u306b\u3082\u53c2\u7167\u5916\u3057\u578b\u5f37\u5236\u3068\u3044\u3046\u6a5f\u80fd\u304c\u3042\u3063\u305f\u308a\u3057\u307e\u3059\u304c\u3001\u521d\u5fc3\u8005\u306e\u67a0\u3092\u306f\u307f\u51fa\u3066\u3044\u308b\u306e\u3067\u7701\u7565\u3057\u307e\u3059\u3002<\/p>\n
\u304a\u307e\u3051\uff08Rust\u306b\u306f\u7121\u3044\u6a5f\u80fd\uff09<\/h2>\n
Rust\u306b\u306f\u4ee5\u4e0b\u306e\u6a5f\u80fd\u304c\u7121\u3044\u3053\u3068\u306b\u3082\u521d\u5fc3\u8005\u306f\u9a5a\u304f\u3053\u3068\u304c\u591a\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n
    \n
  • \n
      \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u7121\u3044<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \n
      • \n
          \u95a2\u6570\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u304c\u7121\u3044<\/ul>\n<\/li>\n<\/ul>\n
           <\/p>\n
            \n
          • \n
              \u95a2\u6570\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5f15\u6570\u304c\u7121\u3044<\/ul>\n<\/li>\n<\/ul>\n
               <\/p>\n
                \n
              • \n
                  \u53ef\u5909\u9577\u5f15\u6570\u95a2\u6570\u306e\u6a5f\u80fd\u304c\u7121\u3044<\/ul>\n<\/li>\n<\/ul>\n
                   <\/p>\n
                    \n
                  • \n
                      \u4f8b\u5916\uff08Exception\uff09\u6a5f\u69cb\u304c\u7121\u3044<\/ul>\n<\/li>\n<\/ul>\n
                       <\/p>\n
                        struct\u306e\u7d99\u627f\u304c\u7121\u3044<\/ul>\n
                        \u305f\u3060\u3001\u3053\u308c\u3089\u306fRust\u958b\u767a\u8005\u304c\u610f\u56f3\u7684\u306b\u7701\u3044\u3066\u3044\u308b\u3082\u306e\u304c\u307b\u3068\u3093\u3069\u3067\u3059\u3002
                        \n\u7279\u306b\u4f8b\u5916\uff08Exception\uff09\u3092\u7701\u3044\u3066\u3044\u308b\u3053\u3068\u306f\u305d\u306e\u6700\u305f\u308b\u4f8b\u3067\u3059\u3002\uff08unwrap\u306e\u9805\u76ee\u3067\u66f8\u3044\u305f\u901a\u308a\u5b9f\u884c\u6642\u5b89\u5168\u6027\u306e\u305f\u3081\uff09
                        \n\u307e\u305f\u3001\u95a2\u6570\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306b\u3064\u3044\u3066\u306f\u4ee5\u524d\u306b\u66f8\u3044\u305f\u8a18\u4e8b\u3067\u8a73\u3057\u304f\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u3002
                        \n“Rust\u3067\u95a2\u6570\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306f\u9811\u5f35\u308c\u308b\u306e\u304b”
                        \nstruct\u306e\u7d99\u627f\u304c\u7121\u3044\u3053\u3068\u3078\u306e\u5bfe\u51e6\u6cd5\u306b\u3064\u3044\u3066\u3082\u5225\u8a18\u4e8b\u3092\u66f8\u304d\u307e\u3057\u305f\u3002
                        \n“Rust\u3067\u7d99\u627f\u3092\u4f7f\u3044\u305f\u3044\u4eba\u3078\u306e\u51e6\u65b9\u7b8b”<\/p>\n
                        \u611f\u60f3<\/h2>\n
                        Rust\u3067\u521d\u5fc3\u8005\u6bba\u3057\u3060\u3068\u611f\u3058\u305f\u7b87\u6240\u306f\u8abf\u3079\u308b\u3068\u672c\u5f53\u306b\u5965\u304c\u6df1\u304f\u3001\u5b66\u7fd2\u30cf\u30fc\u30c9\u30eb\u306e\u9ad8\u3055\u3092\u3072\u3057\u3072\u3057\u3068\u611f\u3058\u307e\u3059\u3002
                        \n\u305f\u3060\u3001\u305d\u308c\u3060\u3051\u5b9f\u884c\u6642\u306e\u5b89\u5168\u6027\u306fC++\u3068\u6bd4\u3079\u3066\u98db\u8e8d\u7684\u306b\u9ad8\u307e\u3063\u3066\u304a\u308a\u3001\u305d\u3057\u3066\u5b9f\u884c\u6642\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306f\uff08C\/C++\u3092\u9664\u304f\uff09\u4ed6\u8a00\u8a9e\u306e\u8ffd\u968f\u3092\u8a31\u3055\u306a\u3044\u305f\u3081\u3001\u3068\u306b\u304b\u304f\u30b3\u30f3\u30d1\u30a4\u30eb\u304c\u901a\u308b\u30b3\u30fc\u30c9\u3092\u66f8\u304d\u304d\u308a\u3055\u3048\u3059\u308c\u3070\u3001\u4ed6\u306e\u8a00\u8a9e\u3067\u306f\u5f97\u3089\u308c\u306a\u3044\u54c1\u8cea\u3092\u4f53\u9a13\u3067\u304d\u308b\u306e\u304b\u306a\u3068\u601d\u3044\u307e\u3059\u3002
                        \n\u3068\u306b\u304b\u304f\u30e1\u30e2\u30ea\u5b89\u5168\u6027\u3084\u30bc\u30ed\u30b3\u30b9\u30c8\u62bd\u8c61\u5316\u306a\u3069\u306e\u5b9f\u5229\u7684\u306a\u6a5f\u80fd\u3092\u8ffd\u6c42\u3057\u3064\u3064\u3001\u3067\u304d\u308b\u3060\u3051\u305d\u308c\u3089\u9ad8\u5ea6\u306a\u6a5f\u80fd\u3092\u7c21\u6f54\u306b\u66f8\u3051\u308b\u3088\u3046\u306b\u5de5\u592b\u3055\u308c\u305f\u7d50\u679c\u3001\u72ec\u7279\u306a\u8a18\u6cd5\u304c\u305f\u304f\u3055\u3093\u751f\u3058\u3066\u3044\u308b\u3088\u3046\u306b\u611f\u3058\u307e\u3059\u3002
                        \n\u305d\u3057\u3066\u305d\u306e\u3088\u3046\u306b\u5b9f\u5229\u7684\u306a\u30e1\u30ea\u30c3\u30c8\u3092\u63d0\u4f9b\u3057\u3066\u3044\u308b\u70b9\u3067Rust\u306b\u9b45\u529b\u3092\u611f\u3058\u308b\u4eba\u306f\u591a\u3044\u306e\u3067\u306f\u306a\u3044\u304b\u306a\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                        \u6982\u8981 \u3053\u306e\u8a18\u4e8b\u3067\u306fRust\u521d\u5fc3\u8005\u304c\u9a5a\u3044\u305f\u308a\u6df7\u4e71\u3055\u305b\u3089\u308c\u305f\u308a\u3059\u308b\u3088\u3046\u306aRust\u306e\u6587\u6cd5\u309210\u9805\u76ee\u96c6\u3081\u3066\u307f\u307e\u3057\u305f\u3002  […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45617","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n- 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\/45617-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u6982\u8981 \u3053\u306e\u8a18\u4e8b\u3067\u306fRust\u521d\u5fc3\u8005\u304c\u9a5a\u3044\u305f\u308a\u6df7\u4e71\u3055\u305b\u3089\u308c\u305f\u308a\u3059\u308b\u3088\u3046\u306aRust\u306e\u6587\u6cd5\u309210\u9805\u76ee\u96c6\u3081\u3066\u307f\u307e\u3057\u305f\u3002 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45617-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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