{"id":45187,"date":"2023-08-14T09:52:01","date_gmt":"2022-12-03T13:07:57","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45187-2\/"},"modified":"2024-04-30T18:29:59","modified_gmt":"2024-04-30T10:29:59","slug":"45187-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45187-2\/","title":{"rendered":""},"content":{"rendered":"

\u4eca\u56de\u306fRust\u306e\u8a00\u8a9e\u4ed5\u69d8\u306b\u3064\u3044\u3066\u66f8\u3044\u3066\u3044\u304d\u307e\u3059\u3002
\n\u8a00\u8a9e\u4ed5\u69d8\u306b\u3064\u3044\u3066\u5168\u3066\u3092\u66f8\u304f\u3068\u306a\u308b\u3068\u5927\u5909\u306a\u3053\u3068\u306b\u306a\u308b\u305f\u3081\u3001\u500b\u4eba\u7684\u306b\u91cd\u8981\u3060\u3068\u601d\u3046\u7b87\u6240\u3092\u30d4\u30c3\u30af\u30a2\u30c3\u30d7\u3057\u3066\u66f8\u3044\u3066\u3044\u304d\u307e\u3059\u3002
\n\u3082\u3063\u3068\u8a73\u3057\u3044\u4ed5\u69d8\u3092\u77e5\u308a\u305f\u3044\u3068\u3044\u3046\u65b9\u306f\u4e0b\u8a18\u30da\u30fc\u30b8\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002
\nhttps:\/\/doc.rust-jp.rs\/book-ja\/<\/p>\n

\u56e0\u307f\u306b\u3001\u4eca\u56de\u66f8\u304d\u305f\u304b\u3063\u305f\u5185\u5bb9\u306b\u95a2\u3057\u3066\u306ftrait\u4ee5\u964d\u306e\u90e8\u5206\u3067\u3059\u306e\u3067\u3001\u4ed5\u69d8\u306b\u95a2\u3057\u3066\u7406\u89e3\u3057\u3066\u3044\u308b\u3068\u3044\u3046\u65b9\u306ftrait\u4ee5\u964d\u306e\u90e8\u5206\u3092\u8aad\u3093\u3067\u9802\u3051\u308b\u3068\u3042\u308a\u304c\u305f\u3044\u3067\u3059\u3002<\/p>\n

\u69cb\u9020\u4f53<\/h2>\n

Rust\u306b\u306f\u30af\u30e9\u30b9\u304c\u5b58\u5728\u3057\u307e\u305b\u3093\u3002
\n\u4ed6\u8a00\u8a9e\u306e\u30af\u30e9\u30b9\u3068\u540c\u69d8\u306e\u3053\u3068\u3092\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u69cb\u9020\u4f53\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002
\n\u4f8b\u3068\u3057\u3066\u3001C#\u3068\u6bd4\u8f03\u3059\u308b\u3068\u4e0b\u8a18\u306e\u69d8\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

class<\/span> Program<\/span> {<\/span>\r\n    static<\/span> void<\/span> Main<\/span>()<\/span> {<\/span>\r\n        A<\/span> a_class<\/span> =<\/span> new<\/span> A<\/span>();<\/span>\r\n        a_class<\/span>.<\/span>set_i<\/span>(<\/span>9<\/span>);<\/span>\r\n        Console<\/span>.<\/span>WriteLine<\/span>(<\/span>a_class<\/span>.<\/span>get_i<\/span>());<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nclass<\/span> A<\/span> {<\/span>\r\n    private<\/span> int<\/span> i<\/span>;<\/span>\r\n    public<\/span> int<\/span> get_i<\/span>()<\/span> {<\/span>\r\n        return<\/span> i<\/span>;<\/span>\r\n    }<\/span>\r\n    public<\/span> void<\/span> set_i<\/span>(<\/span>int<\/span> a1<\/span>)<\/span> {<\/span>\r\n        i<\/span> =<\/span> a1<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
fn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> mut<\/span> a<\/span> =<\/span> A<\/span>::<\/span>new<\/span>();<\/span>\r\n    \/\/ \u2191 let mut a = A { i: 0 };<\/span>\r\n    a<\/span>.set_i<\/span>(<\/span>9<\/span>);<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> a<\/span>.get_i<\/span>());<\/span>\r\n}<\/span>\r\n\r\nstruct<\/span> A<\/span> {<\/span>\r\n    i<\/span>:<\/span> i32<\/span>,<\/span>\r\n}<\/span>\r\nimpl<\/span> A<\/span> {<\/span>\r\n    pub<\/span> fn<\/span> new<\/span>()<\/span> -><\/span> Self<\/span> {<\/span>\r\n        Self<\/span> {<\/span> i<\/span>:<\/span> 0<\/span> }<\/span>\r\n    }<\/span>\r\n    pub<\/span> fn<\/span> get_i<\/span>(<\/span>&<\/span>self<\/span>)<\/span> -><\/span> i32<\/span> {<\/span>\r\n        self<\/span>.i<\/span>\r\n    }<\/span>\r\n    pub<\/span> fn<\/span> set_i<\/span>(<\/span>&<\/span>mut<\/span> self<\/span>,<\/span> a1<\/span>:<\/span> i32<\/span>)<\/span> {<\/span>\r\n        self<\/span>.i<\/span> =<\/span> a1<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
C# \u2192 Rust\u3067\u6bd4\u8f03\u3059\u308b\u3068\u3001
\nclass\u2192struct+impl
\nint\u2192i32
\npublic\u2192pub
\nprivate\u2192 (\u7121\u8a18\u5165)
\nvoid\u2192fn
\nint\u578b\u306e\u95a2\u6570\u2192fn \u95a2\u6570\u540d()->i32
\n\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
Rust\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3059\u308b\u5834\u5408\u3001new()\u95a2\u6570\u3092\u81ea\u8eab\u3067\u4f5c\u6210\u3059\u308b\u304b\u3001\u69cb\u9020\u4f53\u306e\u751f\u6210\u6642\u306b\u5185\u90e8\u5909\u6570\uff08Rust\u3067\u306f\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u3044\u3044\u307e\u3059\uff09\u306b\u5bfe\u3057\u3066\u521d\u671f\u5024\u3092\u5165\u308c\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\n\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u3055\u308c\u3066\u3044\u308blet a = A { i: 0 };\u304c\u69cb\u9020\u4f53\u751f\u6210\u306e\u4e00\u822c\u7684\u306a\u65b9\u6cd5\u3067\u3059\u3002
\n\uff08#[derive(Default)]\u3092\u69cb\u9020\u4f53\u306b\u4ed8\u4e0e\u3057\u3066A::default()\u3067\u751f\u6210\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\uff09<\/p>\n
impl\u3068\u3044\u3046\u4ed6\u8a00\u8a9e\u3067\u306f\u898b\u6163\u308c\u306a\u3044\u6587\u8a00\u304c\u3042\u308a\u307e\u3059\u304c\u3001impl\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u69cb\u9020\u4f53\u306b\u5bfe\u3057\u3066\u95a2\u6570\u3001\u30e1\u30bd\u30c3\u30c9\u3092\u4ed8\u4e0e\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002
\n\u69cb\u9020\u4f53\u306b\u95a2\u6570\u3001\u30e1\u30bd\u30c3\u30c9\u3092\u4ed8\u4e0e\u3059\u308b\u5834\u5408\u306f\u3001struct\u306e\u540d\u79f0\u3067impl\u3092\u4f5c\u6210\u3057\u3001\u305d\u306e\u4e2d\u306b\u95a2\u6570\u3001\u30e1\u30bd\u30c3\u30c9\u3092\u8a18\u5165\u3057\u307e\u3059\u3002
\n\u56e0\u307f\u306b\u3001\u95a2\u6570\u304b\u30e1\u30bd\u30c3\u30c9\u304b\u306e\u5224\u5225\u306f\u3001\u5f15\u6570\u306b(&self)\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3067\u3059\u3002
\n&self\u306f\u81ea\u8eab\u306e\u69cb\u9020\u4f53\u3092\u6307\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u30e1\u30bd\u30c3\u30c9\u5185\u3067\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092\u53c2\u7167\u3057\u305f\u3044\u5834\u5408\u306b\u306fself.~\u3068\u66f8\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\n\u3053\u306e\u5834\u5408\u3001\u5f15\u6570\u306b&self\u3092\u542b\u307e\u306a\u3044\u95a2\u6570\u3068\u547c\u3070\u308c\u308b\u3082\u306e\u306fstatic\u3068\u540c\u69d8\u306e\u6271\u3044\u306b\u306a\u308b\u305f\u3081\u3001\u69cb\u9020\u4f53\u3092\u751f\u6210\u305b\u305a\u3068\u3082\u69cb\u9020\u4f53\u540d::\u95a2\u6570\u540d\u3067\u547c\u3073\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\uff08::new()\u306f\u305d\u308c\u3068\u540c\u69d8\u306e\u610f\u5473\u306b\u306a\u308a\u307e\u3059\u3002\uff09
\n\u307e\u305f\u3001\u69cb\u9020\u4f53\u306b\u5b9a\u6570\u3092\u6301\u305f\u305b\u305f\u3044\u5834\u5408\u3082\u3001impl\u5185\u306b\u66f8\u304d\u8fbc\u307f\u307e\u3059\u3002<\/p>\n
Rust\u306e\u95a2\u6570\u3067\u306f\u3001\u623b\u308a\u5024\u306breturn\u3092\u4ed8\u3051\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u305b\u3093\u3002return\u3092\u7701\u7565\u3059\u308b\u5834\u5408\u306f\u3001;\u3082\u7701\u7565\u3057\u3066\u66f8\u304d\u307e\u3059\u3002<\/p>\n
Rust\u306e\u30b3\u30fc\u30c9\u3067mut\u306e\u6587\u8a00\u304c\u66f8\u304b\u308c\u3066\u3044\u308b\u304b\u3068\u601d\u3044\u307e\u3059\u304c\u3001mut\u306f\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\uff08\u53ef\u5909\u306a\u5909\u6570\uff09\u306e\u610f\u5473\u306b\u306a\u308a\u307e\u3059\u3002
\nRust\u3067\u5ba3\u8a00\u3055\u308c\u308b\u5909\u6570\u306f\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\uff08\u4e0d\u5909\u306a\u5909\u6570\uff09\u306b\u306a\u3063\u3066\u3044\u308b\u305f\u3081\u3001\u5909\u6570\u3092\u4e0a\u66f8\u304d\u3057\u305f\u3068\u3044\u3046\u5834\u5408\u306f\u3001\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u3067\u5ba3\u8a00\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
Rust\u3067\u5909\u6570\u3092\u5ba3\u8a00\u3059\u308b\u3068\u304d\u306f\u3001\u57fa\u672c\u7684\u306b\u6697\u9ed9\u7684\u306a\u578b\u5909\u63db\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002
\n\u660e\u793a\u7684\u306b\u3057\u305f\u3044\u5834\u5408\u306flet a:i32;\u3068\u3059\u308c\u3070a\u304ci32\u306b\u306a\u308a\u307e\u3059\u3002
\n\u578b\u3092\u660e\u8a18\u3057\u306a\u304f\u3068\u3082\u3001\u30d3\u30eb\u30c9\u6642\u306b\u5909\u6570\u306e\u578b\u304c\u6697\u9ed9\u7684\u306b\u56fa\u5b9a\u306b\u306a\u308b\u305f\u3081\u3001\u4e00\u3064\u306e\u5909\u6570\u306b\u5bfe\u3057\u3066\u8907\u6570\u306e\u578b\u306e\u5024\u3092\u5165\u308c\u3088\u3046\u3068\u3059\u308b\u3068\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002
\n\uff08Visual Studio Code\u3067\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3059\u308b\u5834\u5408\u306f\u3001rust-analyzer\u3092\u4f7f\u7528\u3059\u308b\u3068\u30a8\u30e9\u30fc\u304c\u308f\u304b\u308a\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002\uff09<\/p>\n
\u5909\u6570\u306e\u6240\u6709\u6a29\uff08\u501f\u7528\u30fb\u53c2\u7167\u30fbmove\uff09<\/h2>\n
Rust\u306f\u5909\u6570\u306b\u5bfe\u3057\u3066\u5909\u6570\u3092\u4ee3\u5165\u3059\u308b\u3068\u3001\u5909\u6570\u304c\u79fb\u52d5\uff08move\uff09\u3057\u307e\u3059\u3002
\nRust\u306e\u4ed5\u69d8\u3067\u3001\u30e1\u30e2\u30ea\u306e\u4f7f\u7528\u3092\u6291\u3048\u308b\u305f\u3081\u306e\u4ed5\u7d44\u307f\u3068\u3044\u3048\u3070\u826f\u3044\u3067\u3057\u3087\u3046\u304b\uff1f
\n\u30d2\u30fc\u30d7\u3068\u30b9\u30bf\u30c3\u30af\u304c\u95a2\u4fc2\u3057\u3066\u304f\u308b\u306e\u3067\u3059\u304c\u3001\u3053\u3053\u3067\u5168\u3066\u66f8\u304f\u3068\u306a\u308b\u3068\u3001\u30ad\u30ea\u304c\u306a\u3044\u305f\u3081\u3001\u6c17\u306b\u306a\u308b\u65b9\u306f\u4e0b\u8a18\u30da\u30fc\u30b8\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002
\nhttps:\/\/doc.rust-jp.rs\/book-ja\/ch04-01-what-is-ownership.html<\/p>\n
\u5909\u6570\u306e\u79fb\u52d5\u3067\u3069\u306e\u3088\u3046\u306a\u4e8b\u614b\u304c\u767a\u751f\u3059\u308b\u304b\u3068\u3044\u3046\u3068\u3001\u4e0b\u8a18\u306e\u69d8\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u5b9f\u884c\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n
fn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> a<\/span> =<\/span> A<\/span> {<\/span> i<\/span>:<\/span> 7.<\/span> };<\/span>\r\n    let<\/span> b<\/span> =<\/span> a<\/span>;<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> a<\/span>.i<\/span>);<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> b<\/span>.i<\/span>);<\/span>\r\n}<\/span>\r\nstruct<\/span> A<\/span> {<\/span>\r\n    i<\/span>:<\/span> f64<\/span>,<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u30d3\u30eb\u30c9\u3092\u304b\u3051\u305f\u6642\u306e\u30a8\u30e9\u30fc\u306f\u4e0b\u8a18\u306e\u901a\u308a\u3067\u3059\u3002\uff08\u30d3\u30eb\u30c9\u306e\u305f\u3081\u306e\u30b3\u30de\u30f3\u30c9\u306fcargo build\uff09<\/p>\n
error[E0382]: borrow of moved value: `a`\r\n --> src\\main.rs:6:20\r\n  |\r\n4 |     let a = A { i: 7. };\r\n  |         - move occurs because `a` has type `A`, which does not implement the `Copy` trait\r\n5 |     let b = a;\r\n  |             - value moved here\r\n6 |     println!(\"{}\", a.i);\r\n  |                    ^^^ value borrowed here after move\r\n<\/code><\/pre>\n
\u30a8\u30e9\u30fc\u306b\u306f\u3001a.i\u306fb = a\u3092\u884c\u3063\u305f\u30bf\u30a4\u30df\u30f3\u30b0\u3067move\u3057\u3066\u3044\u308b\u305f\u3081\u3001a.i\u3092\u501f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u304b\u3063\u305f\u3068\u51fa\u307e\u3059\u3002
\n\u3053\u308c\u304c\u5909\u6570\u306e\u79fb\u52d5(move)\u3067\u3059\u3002
\n\u3053\u306e\u30a8\u30e9\u30fc\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u306b\u306f\u3069\u306e\u3088\u3046\u306b\u3059\u308c\u3070\u3088\u3044\u306e\u304b\uff1f\u3068\u3044\u3046\u8a71\u306b\u306a\u308b\u306e\u3067\u3059\u304c\u3001\u305d\u306e\u305f\u3081\u306b\u306f\u53c2\u7167\u3092\u884c\u3044\u307e\u3059\u3002
\n\u5909\u6570\u306b\u5bfe\u3057\u3066&\u3092\u4ed8\u4e0e\u3059\u308b\u3053\u3068\u3067\u3001\u5909\u6570\u3092\u79fb\u52d5\u3055\u305b\u305a\u306b\u53c2\u7167\u3059\u308b\u3068\u3044\u3046\u6271\u3044\u306b\u306a\u308a\u3001a.i\u306e\u5024\u3092\u501f\u7528\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002
\n\u4e0b\u8a18\u304c\u53c2\u7167\u3092\u4f7f\u3063\u305f\u66f8\u304d\u65b9\u3067\u3059\u3002<\/p>\n
fn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> a<\/span> =<\/span> A<\/span> {<\/span> i<\/span>:<\/span> 7.<\/span> };<\/span>\r\n    let<\/span> b<\/span>:<\/span>&<\/span>A<\/span> =<\/span> &<\/span>a<\/span>;<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> a<\/span>.i<\/span>);<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> b<\/span>.i<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u53c2\u7167\u3092\u884c\u3063\u305f\u5834\u5408\u306e\u6ce8\u610f\u70b9\u3067\u3059\u304c\u3001\u4e0a\u8a18\u30b3\u30fc\u30c9\u3067\u660e\u8a18\u3057\u305f\u901a\u308a\u3001\u53c2\u7167\u6642\u306e\u5909\u6570\u306e\u578b\u304c&A\u3068\u306a\u308a\u3001A\u3068\u306f\u5225\u306e\u578b\u3068\u3044\u3046\u6271\u3044\u306b\u306a\u308a\u307e\u3059\u3002
\n\u307e\u305f\u3001\u53c2\u7167\u5024\u306b\u306f\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u3068\u3044\u3046\u3082\u306e\u304c\u4ed5\u7d44\u307e\u308c\u3066\u304a\u308a\u3001\u30b9\u30b3\u30fc\u30d7\u306e\u5916\u306b\u51fa\u308b\u3068\u305d\u306e\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u304c\u5207\u308c\u3066\u5909\u6570\u3092\u53c2\u7167\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3059\u3002\uff08\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u304c\u5207\u308c\u306a\u3044&’static\u3068\u3044\u3046\u3082\u306e\u3082\u3042\u308a\u307e\u3059\uff09
\n\u4e0a\u8a18\u306e\u554f\u984c\u304c\u89e3\u6d88\u3067\u304d\u306a\u3044\u3068\u3044\u3046\u5834\u5408\u306f.clone()\u3092\u4f7f\u7528\u3057\u3066\u30b3\u30d4\u30fc\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002
\n\u5f53\u7136\u3067\u3059\u304c\u3001\u30b3\u30d4\u30fc\u3092\u4f5c\u6210\u3057\u3066\u3044\u308b\u3060\u3051\u306a\u306e\u3067\u3001\u5143\u306e\u5024\u3068\u306f\u5225\u306e\u5024\u3068\u3057\u3066\u6271\u3046\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002
\n\u3053\u306e\u8fba\u308a\u306f\u3001\u4ed6\u306e\u8a00\u8a9e\u3068\u6bd4\u8f03\u3059\u308b\u3068\u304b\u306a\u308a\u5384\u4ecb\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002
\n\uff08\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u653e\u68c4\u3057\u3066\u30e1\u30e2\u30ea\u7ba1\u7406\u3092\u884c\u3046\u3053\u3068\u3092\u8003\u3048\u308b\u3068\u5f53\u7136\u306e\u4ed5\u69d8\u304b\u3068\u3082\u601d\u3048\u307e\u3059\u304c\uff09<\/p>\n
trait<\/h2>\n
\u3053\u306e\u8fba\u308a\u304b\u3089\u3001\u4eca\u56de\u66f8\u304d\u305f\u304b\u3063\u305f\u5185\u5bb9\u3067\u3059\u3002\uff08\u305f\u3069\u308a\u7740\u304f\u307e\u3067\u304c\u9577\u3044\u7b11\uff09
\ntrait\u3068\u306f\u4f55\u306a\u306e\u304b\u3068\u3044\u3046\u8a71\u3067\u3059\u304c\u3001\u4ed6\u8a00\u8a9e\u3067\u8a00\u3046\u3068\u3053\u308d\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u3059\u3002
\ntrait\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u69cb\u9020\u4f53\u306b\u5bfe\u3057\u3066\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u88c5\u3092\u5f37\u5236\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002
\n\u30b5\u30f3\u30d7\u30eb\u306f\u4e0b\u8a18\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n
trait<\/span> TraitA<\/span> {<\/span>\r\n    fn<\/span> b<\/span>(<\/span>&<\/span>self<\/span>)<\/span> -><\/span> f64<\/span>;<\/span>\r\n}<\/span>\r\n\r\nstruct<\/span> StructA<\/span> {<\/span>\r\n    i<\/span>:<\/span> i32<\/span>,<\/span>\r\n}<\/span>\r\nimpl<\/span> StructA<\/span> {<\/span>\r\n    fn<\/span> get_i<\/span>(<\/span>&<\/span>self<\/span>)<\/span> -><\/span> i32<\/span> {<\/span>\r\n        self<\/span>.i<\/span>\r\n    }<\/span>\r\n}<\/span>\r\nimpl<\/span> TraitA<\/span> for<\/span> StructA<\/span> {<\/span>\r\n    fn<\/span> b<\/span>(<\/span>&<\/span>self<\/span>)<\/span> -><\/span> f64<\/span> {<\/span>\r\n        \/\/ i\u3092f64\u306b\u5909\u63db\u3057\u3066\u30019.9\u3068\u8db3\u3059<\/span>\r\n        self<\/span>.i<\/span> as<\/span> f64<\/span> +<\/span> 9.9<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u4e0a\u8a18\u306e\u66f8\u304d\u65b9\u3092\u3059\u308b\u3068\u3001StructA\u306b\u5bfe\u3057\u3066TraitA \u306efn b()\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002
\nimpl TraitA for StructA {} \u306b\u5bfe\u3057\u3066\u306f TraitA\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308bfn b()\u3057\u304b\u5b9a\u7fa9\u3067\u304d\u306a\u3044\u305f\u3081\u3001StructA\u306b\u5bfe\u3057\u3066\u30e1\u30bd\u30c3\u30c9\u3092\u8ffd\u52a0\u3057\u305f\u3044\u5834\u5408\u306f\u5225\u3067impl StructA\u3092\u4f5c\u6210\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u7d99\u627f\uff08\u306e\u3088\u3046\u306a\u3082\u306e\uff09<\/h2>\n
Rust\u306b\u306f\u7d99\u627f\u306f\u5b58\u5728\u3057\u307e\u305b\u3093\u3002
\n\u3067\u3059\u304c\u3001\u5148\u307b\u3069\u306etrait\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u7d99\u627f\u306e\u69d8\u306a\u3082\u306e\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u3059\u3002<\/p>\n
trait<\/span> TraitA<\/span> {<\/span>\r\n    fn<\/span> b<\/span>(<\/span>&<\/span>self<\/span>)<\/span> -><\/span> i32<\/span> {<\/span>\r\n        self<\/span>.get_a<\/span>()<\/span>\r\n    }<\/span>\r\n    fn<\/span> get_a<\/span>(<\/span>&<\/span>self<\/span>)<\/span> -><\/span> i32<\/span>;<\/span>\r\n}<\/span>\r\n\r\nstruct<\/span> StructA<\/span> {<\/span>\r\n    a<\/span>:<\/span> i32<\/span>,<\/span>\r\n}<\/span>\r\nimpl<\/span> TraitA<\/span> for<\/span> StructA<\/span> {<\/span>\r\n    fn<\/span> get_a<\/span>(<\/span>&<\/span>self<\/span>)<\/span> -><\/span> i32<\/span> {<\/span>\r\n        self<\/span>.a<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nstruct<\/span> StructB<\/span> {<\/span>\r\n    a<\/span>:<\/span> i32<\/span>,<\/span>\r\n}<\/span>\r\nimpl<\/span> TraitA<\/span> for<\/span> StructB<\/span> {<\/span>\r\n    fn<\/span> get_a<\/span>(<\/span>&<\/span>self<\/span>)<\/span> -><\/span> i32<\/span> {<\/span>\r\n        self<\/span>.a<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
TraitA\u306b\u5bfe\u3057\u3066a\u306egetter\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3067\u3001StructA\u3068StructB\u306b\u5bfe\u3057\u3066fn b()\u306e\u5171\u901a\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4ed8\u4e0e\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002
\n\u305f\u3060\u3001\u3053\u306e\u66f8\u304d\u65b9\u3060\u3068\u5927\u3057\u3066\u30b3\u30fc\u30c9\u306e\u91cf\u304c\u6e1b\u3089\u306a\u3044\u306e\u3067\u3001\u3053\u306e\u5f62\u3067\u5b9f\u88c5\u3059\u308b\u30e1\u30ea\u30c3\u30c8\u306f\u3042\u307e\u308a\u306a\u3044\u3067\u3059\u3002<\/p>\n
Getter<\/h2>\n
\u3053\u3053\u304b\u3089\u306f\u3042\u307e\u308a\u8a00\u8a9e\u4ed5\u69d8\u3068\u95a2\u4fc2\u304c\u306a\u3044\u3067\u3059\u3002
\nRust\u306b\u306fcrate\u3068\u3044\u3046\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002
\n\u4ed6\u8a00\u8a9e\u3044\u3046\u3068\u3053\u308d\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3001crate\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3067\u6a5f\u80fd\u3092\u62e1\u5f35\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002
\ncrate\u3092\u8ffd\u52a0\u3059\u308b\u305f\u3081\u306b\u306f\u3001Cargo.toml\u30d5\u30a1\u30a4\u30eb\u306b\u5bfe\u3057\u3066\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\n\uff08\u4ee5\u524d\u3001wasm \u306e\u8a18\u4e8b\u3067\u540c\u69d8\u306e\u3053\u3068\u3092\u66f8\u3044\u305f\u304b\u3068\u601d\u3046\u306e\u3067\u3001\u8aac\u660e\u306f\u7701\u304d\u307e\u3059\uff09
\n\u56e0\u307f\u306b\u3001lib.rs \u306b\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3068crate\u3068\u3057\u3066\u306e\u6271\u3044\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
crate\u3067derive-getters\u3068\u3044\u3046crate\u304c\u3042\u308b\u306e\u3067\u3059\u304c\u3001derive-getters\u3092\u4f7f\u7528\u3059\u308b\u3068\u69cb\u9020\u4f53\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306egetter\u3092\u81ea\u52d5\u3067\u751f\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002
\n\u30b5\u30f3\u30d7\u30eb\u306eRust\u5074\u306e\u30b3\u30fc\u30c9\u306f\u4e0b\u8a18\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n
use<\/span> derive_getters<\/span>::<\/span>Getters<\/span>;<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> a<\/span> =<\/span> A<\/span> {<\/span> i<\/span>:<\/span> 7.<\/span> };<\/span>\r\n    print!<\/span>(<\/span>\"{}\"<\/span>,<\/span> a<\/span>.i<\/span>())<\/span>\r\n}<\/span>\r\n\r\n#[derive(Getters,<\/span> Default,<\/span> Clone)]<\/span>\r\nstruct<\/span> A<\/span> {<\/span>\r\n    i<\/span>:<\/span> f64<\/span>,<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001#[derive(Getters)]\u3092struct A\u306b\u5bfe\u3057\u3066\u4ed8\u4e0e\u3059\u308b\u3053\u3068\u3067\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u306ei\u306egetter\u3092\u81ea\u52d5\u751f\u6210\u3057\u3066\u3044\u307e\u3059\u3002\uff08getter\u306ei()\u306e\u623b\u308a\u5024\u306f&f64\u306b\u306a\u308a\u307e\u3059\uff09
\n\u56e0\u307f\u306b\u3001\u8a71\u306e\u4e2d\u3067\u6642\u3005\u51fa\u3066\u3044\u305f#[derive(~)]\u306e\u66f8\u304d\u65b9\u306f\u4e0a\u8a18\u306e\u30b5\u30f3\u30d7\u30eb\u3068\u540c\u69d8\u306b\u66f8\u304d\u307e\u3059\u3002<\/p>\n
\u304a\u308f\u308a\u306b<\/h2>\n
\u4eca\u56de\u3001\u9577\u3005\u3068\u66f8\u3044\u3066\u3001\u4f55\u3092\u66f8\u304d\u305f\u304b\u3063\u305f\u304b\u3068\u3044\u3046\u3068\u3001getter\u3092\u81ea\u52d5\u751f\u6210\u3059\u308c\u3070trait\u3092\u7d4c\u7531\u3057\u3066\u7d99\u627f\u3067\u304d\u308b\u306e\u3067\u306f\uff1f\u3068\u601d\u3063\u305f\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002
\n\u51b7\u9759\u306b\u8003\u3048\u308c\u3070\u4e0d\u53ef\u80fd\u3067\u3059\u304c\uff08\u7b11\uff09
\nGetters\u3067\u81ea\u52d5\u751f\u6210\u3055\u308c\u308bgetter\u30e1\u30bd\u30c3\u30c9\u3068\u3001\u540c\u69d8\u306e\u30e1\u30bd\u30c3\u30c9\u3092tarit\u306b\u5bfe\u3057\u3066\u5b9a\u7fa9\u3057\u305f\u3068\u3057\u3066\u3082\u3001\u81ea\u52d5\u751f\u6210\u3055\u308c\u308bgetter\u306fimpl \u69cb\u9020\u4f53\u540d{}\u306b\u5bfe\u3057\u3066\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u3057\u304b\u306a\u304f\u3001impl trait\u540d for \u69cb\u9020\u4f53\u540d{}\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u306f\u6210\u308a\u3048\u306a\u3044\u305f\u3081\u3067\u3059\u3002
\n\u306a\u305c\u3001\u7d99\u627f\u306f\u3067\u304d\u306a\u3044\u306e\u3067\u3057\u3087\u3046\u304b\u2026
\n\u307e\u3042\u3001\u5b9f\u88c5\u3059\u308b\u3068\u4e0d\u90fd\u5408\u304c\u767a\u751f\u3059\u308b\u304b\u3089\u3060\u3068\u601d\u308f\u308c\u307e\u3059\u304c\u3001\u3044\u305a\u308cRust\u306b\u3082\u7d99\u627f\u304c\u5b9f\u88c5\u3055\u308c\u308b\u3068\u826f\u3044\u3067\u3059\u306d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4eca\u56de\u306fRust\u306e\u8a00\u8a9e\u4ed5\u69d8\u306b\u3064\u3044\u3066\u66f8\u3044\u3066\u3044\u304d\u307e\u3059\u3002 \u8a00\u8a9e\u4ed5\u69d8\u306b\u3064\u3044\u3066\u5168\u3066\u3092\u66f8\u304f\u3068\u306a\u308b\u3068\u5927\u5909\u306a\u3053\u3068\u306b\u306a\u308b\u305f\u3081\u3001\u500b\u4eba […]<\/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-45187","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\/45187-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u4eca\u56de\u306fRust\u306e\u8a00\u8a9e\u4ed5\u69d8\u306b\u3064\u3044\u3066\u66f8\u3044\u3066\u3044\u304d\u307e\u3059\u3002 \u8a00\u8a9e\u4ed5\u69d8\u306b\u3064\u3044\u3066\u5168\u3066\u3092\u66f8\u304f\u3068\u306a\u308b\u3068\u5927\u5909\u306a\u3053\u3068\u306b\u306a\u308b\u305f\u3081\u3001\u500b\u4eba […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45187-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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