{"id":363388,"date":"2022-02-26T14:15:37","date_gmt":"2022-02-26T06:15:37","guid":{"rendered":"https:\/\/www.idc.net\/help\/363388\/"},"modified":"2022-02-26T14:15:37","modified_gmt":"2022-02-26T06:15:37","slug":"rust-%e8%af%ad%e8%a8%80%e6%8a%80%e5%b7%a7%e5%92%8c%e7%aa%8d%e9%97%a8","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/363388\/","title":{"rendered":"Rust \u8bed\u8a00\u6280\u5de7\u548c\u7a8d\u95e8"},"content":{"rendered":"<p>Rust\u662f\u4e00\u79cd\u5168\u65b0\u7cfb\u7edf\u7f16\u7a0b\u8bed\u8a00\uff0cRust\u8bed\u8a00\u7acb\u8db3\u4e8e\u7f16\u8bd1\u65f6\u5b89\u5168\uff0c\u7531\u4e8e\u6ca1\u6709\u5176\u4ed6\u8bed\u8a00GC\u9644\u5e26\uff0cRust\u4e5f\u662f\u4e00\u95e8\u9ad8\u6027\u80fd\u8bed\u8a00\uff0c\u6027\u80fd\u582a\u6bd4C\u3002\u6700\u8fd1\u51e0\u5e74\u5185\uff0cRust\u88ab\u5f00\u53d1\u4eba\u5458\u5e7f\u4e3a\u91c7\u7eb3\uff0c\u662f\u597d\u591a\u5e74\u5e74\u5ea6\u6700\u53d7\u6b22\u8fce\u8bed\u8a00\u548c\u5f00\u53d1\u8005\u6700\u60f3\u5b66\u4e60\u7684\u8bed\u8a00\u3002Rust\u662f\u6700\u6709\u524d\u9014\u53ef\u4ee5\u66ff\u4ee3C\/C++\u7684\u8bed\u8a00\u4e4b\u4e00\u3002<\/p>\n<p style=\"text-align: center\"><span>[[333734]]<\/span><\/p>\n<p>&nbsp;<\/p>\n<p>\u5f53\u7136Rust\u4e5f\u6709\u7f3a\u70b9\u5c31\u662f\u5b66\u4e60\u66f2\u7ebf\u6bd4\u8f83\u66f2\u6298\uff0c\u5bf9\u521d\u5b66\u8005\u4e0d\u662f\u90a3\u4e48\u53cb\u597d\u3002\u672c\u6587\u866b\u866b\u7ed9\u5927\u5bb6\u5206\u4eab\u4e00\u4e0bRust\u8bed\u8a00\u7684\u4e00\u4e9b\u9488\u5bf9\u521d\u5b66\u8005\u7684\u7f16\u7a0b\u6280\u5de7\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n<p><strong>Racer,Clippy,rustfmt\u548cfix<\/strong><\/p>\n<p>\u8fd9\u662f\u975e\u5e38\u597d\u7528\u7684\u4e00\u7ec4\u5de5\u5177\u3002<\/p>\n<p>Racer\u7528\u6765\u5e2e\u52a9\u4f60\u5bf9rust\u4ee3\u7801\u8fdb\u884c\u8865\u5168\u3002<\/p>\n<p>\u53ef\u4ee5\u4f7f\u7528cargo\u5b89\u88c5racer\u4f7f\u7528\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>cargo&nbsp;install&nbsp;racer&nbsp;<\/span><\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p>racer\u9700\u8981\u5148\u83b7\u53d6Rust\u6e90\u7801\u8def\u5f84\uff0c\u53ef\u4ee5\u901a\u8fc7rustup\u83b7\u53d6\u6e90\u7801\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>rustup&nbsp;component&nbsp;<\/span><span>add<\/span><span>&nbsp;rust-src&nbsp;<\/span><\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p>rustup update\u53ef\u4ee5\u968f\u65f6\u83b7\u53d6\u6700\u65b0\u4ee3\u7801<\/p>\n<p>Clippy\u53ef\u4ee5\u5728\u4ee3\u7801\u4e2d\u6355\u83b7\u5404\u79cdlints\uff0c\u5e76\u68c0\u67e5\u4ee3\u7801\u662f\u5426\u7b26\u5408rust\u60ef\u7528\u5199\u6cd5\uff0c\u5730\u9053\u4e0d\u5730\u9053\u3001\u9ad8\u6548\u4e0d\u9ad8\u6548?\u3002<\/p>\n<p>\u8981\u5b89\u88c5Clippy\uff0c\u8bf7\u8fd0\u884crustup component add clippy<\/p>\n<p>\u7136\u540e\u5728\u5de5\u4f5c\u533a\u4e2d\u8fd0\u884cClippy\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>cargo&nbsp;clippy&nbsp;<\/span><span>--tests&nbsp;--&nbsp;-W&nbsp;clippy::cargo<\/span><span>&nbsp;<\/span><\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u53ef\u4ee5\u901a\u8fc7\u6267\u884c\u547d\u4ee4\u884c\u53c2\u6570\u6216\u8005clippy.toml\u914d\u7f6e\u6587\u6863\u6765\u5236\u5b9aclippy\u7684\u68c0\u67e5\u4e8b\u9879\uff1a<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>rustfmt\u662f\u4e00\u79cd\u6839\u636e\u98ce\u683c\u6837\u5f0f\u6765\u683c\u5f0f\u5316Rust\u4ee3\u7801\u7684\u5de5\u5177\u3002<\/p>\n<p>\u5b89\u88c5rustfmt\uff0c\u4f7f\u7528\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>rustup&nbsp;component&nbsp;<\/span><span>add<\/span><span>&nbsp;rustfmt&nbsp;<\/span><\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u7136\u540e\u5de5\u4f5c\u533a\u4e2d\u8fd0\u884crustfmt\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>cargo&nbsp;fmt\u3002&nbsp;<\/span><\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u540c\u6837\u7684\u53ef\u4ee5\u7528rustfmt.toml\u6765\u914d\u7f6erustfmt\u7684\u98ce\u683c\uff1a<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>cargo fix\u5de5\u5177\u53ef\u4ee5\u81ea\u52a8\u4fee\u590d\u7f16\u8bd1\u5668\u4e2d\u8b66\u544a\u9879\u3002<\/p>\n<p><strong>\u540c\u540d\u5b8f\uff0c\u51fd\u6570\u548c\u7c7b\u578b<\/strong><\/p>\n<p>\u719f\u6089Rust\u7684\u540c\u5b66\u53ef\u80fd\u77e5\u9053\uff0cRust\u6700\u5f3a\u5927\u7684\u529f\u80fd\u4e4b\u4e00\u5c31\u662f\u5b8f\uff0c\u6bd4\u5982Hello\uff0cChongchong\u8303\u4f8b\u4e2d\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>fn&nbsp;main()&nbsp;{&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>println!(<span>\"Hello\uff0cChongchong\"<\/span><span>);&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>}&nbsp;<\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p>println!()\u5c31\u662f\u4e00\u4e2a\u5b8f\u3002<\/p>\n<p>\u5728Rust\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u76f8\u540c\u7684\u540d\u79f0\u58f0\u660e\u4e00\u4e2a\u5b8f\uff0c\u4e00\u4e2a\u51fd\u6570\u548c\u4e00\u4e2a\u7c7b\u578b\uff0c\u7136\u540e\u53ef\u4ee5\u7528\u4e00\u6761import\u8bed\u53e5\u5c06\u4ed6\u4eec\u5f15\u5165\u5176\u4ed6\u6587\u4ef6\u3002<\/p>\n<p><strong>dbg!\u5b8f<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>DBG\u5b8f\u53ef\u7528\u4e8e\u663e\u793a\u8868\u8fbe\u5f0f\u548c\u503c\u7684\u8ba1\u7b97\u8fc7\u7a0b\uff0c\u53ef\u4ee5\u7528\u6765\u5feb\u6377\u8c03\u8bd5\u90e8\u5206\u4ee3\u7801\u8868\u8fbe\u5f0f\u3002\u6bd4\u5982\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>let&nbsp;a&nbsp;=&nbsp;2;&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>et&nbsp;b&nbsp;=&nbsp;dbg!((a+3)&nbsp;*&nbsp;2)&nbsp;+&nbsp;1;&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>assert_eq!(b,&nbsp;11);&nbsp;<\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u4e0a\u9762\u7684\u4ee3\u7801\u5c06\u6253\u5370\u51fa\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>[dbg.rs:3]&nbsp;(a&nbsp;+&nbsp;3)&nbsp;*&nbsp;2&nbsp;=&nbsp;10&nbsp;<\/span><\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p><strong>\u9519\u8bef\u7c7b\u578b\u8f6c\u6362<\/strong><\/p>\n<p>\u76f4\u63a5\u4f7f\u7528rust\u7684\u9519\u8bef\u5904\u7406\u53ef\u80fd\u4e0d\u591f\u7075\u6d3b\uff0c\u4f7f\u7528unwrap()\uff0c\u5f53\u51fa\u73b0\u9519\u8bef\u65f6\u5019\u5c31\u4f1a\u89e6\u53d1panic\uff0c\u5bfc\u81f4\u7a0b\u5e8f\u6302\u6389\uff0c\u5f88\u591a\u65f6\u5019\u8fd9\u4e0d\u662f\u6211\u4eec\u6240\u671f\u671b\u7684\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u4f8b\u5b50\uff0c<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>fn&nbsp;main()&nbsp;{&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>let&nbsp;path&nbsp;=&nbsp;<span>\"\/tmp\/example\"<\/span><span>;&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>println!(<span>\"{}\"<\/span><span>,&nbsp;read_file(path));&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>}&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>fn&nbsp;read_file(path:&nbsp;&amp;str)&nbsp;-&gt;&nbsp;String&nbsp;{&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>std::fs::read_to_string(path).unwrap()&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>}&nbsp;<\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u5982\u679c\/tmp\/example\uff0c\u4e0d\u5b58\u5728\u5c31\u4f1a\u89e6\u53d1panic\u9519\u8bef\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>thread&nbsp;<\/span><span>'main'<\/span><span>&nbsp;panicked&nbsp;<\/span><span>at<\/span><span>&nbsp;<\/span><span>'called&nbsp;`Result::unwrap()`&nbsp;on&nbsp;an&nbsp;`Err`&nbsp;value:&nbsp;Os&nbsp;{&nbsp;code:&nbsp;2,&nbsp;kind:&nbsp;NotFound,&nbsp;message:&nbsp;\"No&nbsp;such&nbsp;file&nbsp;or&nbsp;directory\"&nbsp;}'<\/span><span>,&nbsp;ok.rs:7:5&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>note:&nbsp;run&nbsp;<span>with<\/span><span>&nbsp;`RUST_BACKTRACE=1`&nbsp;environment&nbsp;variable&nbsp;<\/span><span>to<\/span><span>&nbsp;display&nbsp;a&nbsp;backtrace&nbsp;<\/span><\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u597d\u5728\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528?\uff0c\u901a\u8fc7?\u8fd0\u7b97\u7b26\u53ef\u4ee5\u5c06\u9519\u8bef\u8fd4\u56de\u8f6c\u5316\u4e3a\u4e86Err(From::from(err))\u548cOk(ok)\u5206\u652f\u5904\u7406\uff0c\u8fd9\u6837\u9519\u8bef\u53ef\u4ee5\u8f6c\u6362\u4e3a\u81ea\u52a8\u7c7b\u578b\u3002\u90e8\u5206\u4ee3\u7801\u5982\u4e0b\uff0c\u53ef\u4ee5\u81ea\u5b9a\u4e49\u9519\u8bef\u6d88\u606fCustomError\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>fn&nbsp;main()&nbsp;-&gt;&nbsp;std::result::Result&lt;(),CustomError&gt;{&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>let&nbsp;path&nbsp;=&nbsp;<span>\"\/tmp\/example&nbsp;\"<\/span><span>;&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>let&nbsp;v&nbsp;=&nbsp;read_file(path)?;&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>Ok(())&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>}&nbsp;<\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u6a21\u5757\u5316\u6d4b\u8bd5<\/p>\n<p>\u8bd5\u60f3\uff0c\u4f60\u9879\u76ee\u6d4b\u8bd5\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>tests\/&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>aaa.rs&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>bbb.rs&nbsp;<\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u6d4b\u8bd5\u65f6\uff0c\u8fd9\u4e9b\u6bcf\u4e2a\u90fd\u4f1a\u88ab\u7f16\u8bd1\u4e3a\u5355\u72ec\u7684\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u8fd9\u4f1a\u82b1\u8d39\u5927\u91cf\u7f16\u8bd1\u65f6\u95f4\u548c\u7a7a\u95f4\u3002\u53ef\u4ee5\u5c06\u8fd9\u4e9b\u6d4b\u8bd5\u6587\u4ef6\u4f5c\u4e3a\u6a21\u5757\u6dfb\u52a0\u5230\u4e00\u4e2a\u6d4b\u8bd5\u4e2d\uff0c\u8fd9\u6837\u5c31\u53ea\u751f\u6210\u4e00\u4e2a\u4e8c\u8fdb\u5236\u6587\u4ef6\u3002\u65b0\u6d4b\u8bd5\u7ed3\u6784\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>tests\/&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span><span>all<\/span><span>\/&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>mod.rs&nbsp;\/\/&nbsp;mod&nbsp;aaa;&nbsp;mod&nbsp;bbb;&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>aaa.rs&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>bbb.rs&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>mod.rs&nbsp;\/\/&nbsp;mod&nbsp;<span>all<\/span><span>;&nbsp;<\/span><\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u4f7f\u7528\u8be5\u6280\u5de7\uff0c\u80fd\u591f\u5927\u5927\u51cf\u5c11\u7f16\u8bd1\u65f6\u95f4\uff0c\u8282\u7701\u65f6\u95f4\u548c\u7a7a\u95f4\u63d0\u9ad8\u6548\u7387\u3002<\/p>\n<p>\u5f53\u7136\u5b83\u4e5f\u6709\u7f3a\u70b9\u90a3\u5c31\u662f\u4e0d\u80fd\u5bf9\u5355\u4e2a\u6587\u4ef6\u8fdb\u884c\u6d4b\u8bd5\uff0c\u800c\u53ea\u80fd\u7edf\u4e00\u7f16\u8bd1\u8be5\u6587\u4ef6\u3002\u5373\u4f7f\u53ea\u66f4\u6539\u4e86\u4e00\u4e2a\u6d4b\u8bd5\u6587\u4ef6\uff0c\u5b83\u4e5f\u8981\u7f16\u8bd1\u5b8c\u6574\u9879\u76ee\u6587\u4ef6\u3002<\/p>\n<p><strong>\u7f16\u8bd1\u5668\u7f13\u5b58<\/strong><\/p>\n<p>Rust\u7f16\u8bd1\u5668cargo\u53ea\u652f\u6301\u5de5\u4f5c\u533a\u5185\u90e8\u9879\u76ee\u95f4\u7684\u7f16\u8bd1\u7f13\u5b58\uff0c\u4e0d\u652f\u6301\u5de5\u4f5c\u533a\u4e4b\u95f4\u7684\u7f13\u5b58\u3002\u5bf9\u4e8e\u591a\u4e2a\u5de5\u4f5c\u533a\u7684\u591a\u4e2a\u9879\u76ee\u4f7f\u7528\u76f8\u540c\u7684\u4f9d\u8d56\u5173\u7cfb\uff0c\u5c31\u8981\u989d\u5916\u82b1\u8d39\u65f6\u95f4\u5404\u81ea\u7f16\u8bd1\u3002\u6211\u4eec\u53ef\u4ee5\u501f\u52a9cargo\u7f13\u5b58\u5de5\u5177sccahe\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n<p>sccache\u662f\u7c7b\u4f3c\u4e8eccache\u7684cargo\u7684\u7f16\u8bd1\u5668\u7f13\u5b58\uff0c\u7f16\u8bd1\u8be5\u4f9d\u8d56\u5173\u7cfb\u4e00\u6b21\uff0c\u7136\u540e\u5728\u6240\u6709\u9879\u76ee\u4e2d\u5c31\u53ef\u4ee5\u91cd\u590d\u4f7f\u7528\u3002\u53ef\u4ee5\u5927\u5927\u8282\u7701\u7f16\u8bd1\u65f6\u95f4\u548c\u78c1\u76d8\u7a7a\u95f4\u3002sccache\u9664\u4e86\u53ef\u4ee5\u628a\u7f16\u8bd1\u6784\u5efa\u5b58\u5728\u672c\u5730\u5916\uff0c\u4e5f\u652f\u6301\u5b58\u5728\u4e91\u7aef\uff0c\u6bd4\u5982AWS S3\u6216\u8005GCS\u7b49\u3002<\/p>\n<p>\u53ef\u4ee5\u4f7f\u7528\u64cd\u4f5c\u7cfb\u7edf\u5305\u7ba1\u7406\u5668\u6216\u8005cargo\u6765\u5b89\u88c5sccache\uff1a<\/p>\n<p>cargo install sccache\u3002<\/p>\n<p>windows\u4e0b\u53ef\u4ee5\u4f7f\u7528<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>scoop&nbsp;install&nbsp;sccache&nbsp;<\/span><\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u8981\u4f7f\u7528sccache\u7f13\u5b58rust\u7f16\u8bd1\uff0c\u9700\u8981\u5728cargo\u914d\u7f6e\u6587\u4ef6(~\/.cargo\/config)\u4e2d\u5b9a\u4e49build.rustc-wrapper\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>[build]&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>rustc-wrapper&nbsp;=&nbsp;<span>\"\/path\/to\/sccache\"<\/span><span>&nbsp;<\/span><\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u4e5f\u53ef\u4ee5\u5728\u7f16\u8bd1\u65f6\u5019\u76f4\u63a5\u8bbe\u7f6eRUSTC_WRAPPER\u73af\u5883\u53d8\u91cf\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>RUSTC_WRAPPER=\/path\/<\/span><span>to<\/span><span>\/sccache&nbsp;cargo&nbsp;build&nbsp;<\/span><\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u514b\u9686<\/p>\n<p>\u5728rust\u4e2d\u5bf9\u53d8\u91cf\u8c03\u7528.clone()\u4f1a\u4e3a\u5176\u521b\u5efa\u6570\u636e\u7684\u526f\u672c\u3002\u521b\u5efa\u6570\u636e\u526f\u672c\u9700\u8981\u6d88\u8017\u5f88\u591a\u5185\u5b58\u8d44\u6e90\uff0c\u56e0\u6b64\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u4f1a\u5f71\u54cd\u7a0b\u5e8f\u7684\u6027\u80fd\uff0c\u5e94\u907f\u514d\u4f7f\u7528\u3002\u901a\u5e38\uff0c\u53ef\u4ee5\u5c06\u4f7f\u7528\u5e94\u7528\u5f15\u7528\u800c\u975e\u521b\u5efaclone\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>fn&nbsp;main()&nbsp;{&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>let&nbsp;x&nbsp;=&nbsp;Foo::new();&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>func(x.clone());&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>func(x.clone());&nbsp;\/\/&nbsp;\u8be5\u514b\u9686\u662f\u975e\u5fc5\u987b\u7684&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>fn&nbsp;main()&nbsp;{&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>let&nbsp;x&nbsp;=&nbsp;Foo::new();&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>func(x.clone());&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>func(x);&nbsp;\/\/&nbsp;This&nbsp;will&nbsp;<span>work<\/span><span>&nbsp;fine&nbsp;because&nbsp;you&nbsp;do&nbsp;<\/span><span>not<\/span><span>&nbsp;need&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>\/\/&nbsp;<span>to<\/span><span>&nbsp;use&nbsp;x&nbsp;<\/span><span>after<\/span><span>&nbsp;this&nbsp;call&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>}&nbsp;<\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u4f7f\u7528\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>fn&nbsp;main()&nbsp;{&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>let&nbsp;x&nbsp;=&nbsp;Foo::new();&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>func(&amp;x);&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>func(&amp;x);&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>}&nbsp;<\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p><strong>\u679a\u4e3e\u5927\u5c0f\u53d7\u6700\u5927\u6210\u5458\u9650\u5236<\/strong><\/p>\n<p>\u679a\u4e3e\u7684\u5927\u5c0f\u4f7f\u5176\u80fd\u591f\u5bb9\u7eb3\u5176\u6700\u5927\u7684\u53d8\u4f53\u3002\u56e0\u6b64\uff0c\u5efa\u8bae\u5728\u679a\u4e3e\u5185\u4f7f\u7528\u7c7b\u4f3c\u5927\u5c0f\u7684\u53d8\u4f53\uff0c\u4ee5\u907f\u514d\u5185\u5b58\u5e03\u5c40\u4e0d\u7406\u60f3\u3002\u5982\u679c\u9700\u8981\uff0c\u53ef\u4ee5\u8003\u8651\u5c06\u8f83\u5927\u7684\u53d8\u91cfBox\u5316\u3002\u8003\u8651\u4ee5\u4e0b\u793a\u4f8b\uff1a<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>enum&nbsp;Foo{&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>A(u64),&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>B([u64;&nbsp;1000]),&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>}&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>enum&nbsp;FooBoxing&nbsp;{&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>A(u64),&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>B(Box&lt;[u64;1000]&gt;)&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>}&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>fn&nbsp;main()&nbsp;{&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>let&nbsp;x&nbsp;=&nbsp;Foo::A(0);&nbsp;\/\/&nbsp;\u5927\u5c0f8008&nbsp;\u5b57\u8282&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>let&nbsp;y&nbsp;=&nbsp;FooBoxing::A(0);&nbsp;\/\/&nbsp;16\u5b57\u8282&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>println!(<span>\"Foo&nbsp;size&nbsp;{:?}\"<\/span><span>,&nbsp;std::mem::size_of_val(&amp;x));&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>println!(<span>\"FooBoxing&nbsp;size&nbsp;{:?}\"<\/span><span>,&nbsp;std::mem::size_of_val(&amp;y));&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>}&nbsp;<\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u679a\u4e3eFoo\u7684\u53d8\u4f53A\u7684\u5927\u5c0f\u6bd4\u53d8\u4f53B\u5c0f\u5f97\u591a\uff0c\u4f46\u7528\u4e8e\u4e24\u4e2a\u53d8\u4f53\u7684\u5185\u5b58\u5e03\u5c40\u5c06\u76f8\u540c\uff0c\u56e0\u6b64\uff0c\u5f53\u4f7f\u7528\u53d8\u4f53A\u65f6\uff0c\u5176\u6027\u80fd\u5c06\u4e0d\u7406\u60f3\u3002<\/p>\n<p><strong>\u6807\u51c6\u4ea4\u6362\u529f\u80fd<\/strong><\/p>\n<p>rust swap\u51fd\u6570\u5141\u8bb8\u76f4\u63a5\u4ea4\u6362\u4e24\u4e2a\u53d8\u91cf\uff0c\u800c\u65e0\u9700\u521b\u5efa\u4e00\u4e2a\u4e34\u65f6\u53d8\u91cf\u3002<\/p>\n<pre>\n \n \n \n <ol>\n  \n  \n  \n  <li><span><span>use&nbsp;std::mem;&nbsp;<\/span><\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>let&nbsp;mut&nbsp;x&nbsp;=&nbsp;5;&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>let&nbsp;mut&nbsp;y&nbsp;=&nbsp;42;&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>mem::swap(&amp;mut&nbsp;x,&nbsp;&amp;mut&nbsp;y);&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>assert_eq!(42,&nbsp;x);&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n  \n  \n  \n  <li><span>assert_eq!(5,&nbsp;y);&nbsp;<\/span><\/li>\n \n \n \n <\/ol><\/pre>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>Rust\u8bed\u8a00\u4e2d\u6709\u5f88\u591a\u4f7f\u7528\u7684\u6280\u5de7\u53ef\u4ee5\u53c2\u8003\u3002\u5e0c\u671b\u672c\u6587\u629b\u7816\u5f15\u7389\uff0c\u7ed9\u5927\u5bb6\u4e00\u4e9b\u542f\u53d1\u3002\u5927\u5bb6\u5982\u679c\u66f4\u597d\u7684\u6280\u5de7\u548c\u5b9e\u7528\u65b9\u6cd5\u8bf7\u56de\u590d\u672c\u6587\u3002<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Rust\u662f\u4e00\u79cd\u5168\u65b0\u7cfb\u7edf\u7f16\u7a0b\u8bed\u8a00\uff0cRust\u8bed\u8a00\u7acb\u8db3\u4e8e\u7f16\u8bd1\u65f6\u5b89\u5168\uff0c\u7531\u4e8e\u6ca1\u6709\u5176\u4ed6\u8bed\u8a00GC\u9644\u5e26\uff0cRust\u4e5f\u662f\u4e00\u95e8\u9ad8\u6027\u80fd [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":363389,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[61],"tags":[],"class_list":["post-363388","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-website"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/363388","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=363388"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/363388\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media\/363389"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=363388"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=363388"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=363388"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}