{"id":44995,"date":"2023-07-07T05:51:25","date_gmt":"2023-03-25T11:05:12","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/44995-2\/"},"modified":"2024-04-30T12:24:25","modified_gmt":"2024-04-30T04:24:25","slug":"44995-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/44995-2\/","title":{"rendered":""},"content":{"rendered":"<p>Rust \u306e\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u7b49\u3067 &#8220;projection&#8221; \u3068\u3044\u3046\u8a00\u8449\u304c\u4f7f\u308f\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u304c\u3001Rust \u306b\u304a\u3051\u308b &#8220;projection&#8221; \u306e\u8aac\u660e\u3092\u898b\u3064\u3051\u308b\u3053\u3068\u304c\u3080\u305a\u304b\u3057\u304b\u3063\u305f\u305f\u3081\u3001\u8a18\u4e8b\u3068\u3057\u3066\u6b8b\u3057\u307e\u3059\u3002<\/p>\n<h1>1. Rust \u306b\u304a\u3051\u308b\u7528\u8a9e\u300c\u5c04\u5f71 (projection)\u300d\u306e\u8aac\u660e<\/h1>\n<p>\u300c\u5c04\u5f71 (projection)\u300d\u306f\u3044\u308f\u3086\u308b\u300c\u76f8\u5bfe\u30d1\u30b9\u300d\u306e\u7dcf\u79f0\u3067\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001x.f \u306f\u300c\u30d5\u30a3\u30fc\u30eb\u30c9\u5c04\u5f71 (field projection)\u300d\u3001T::Item \u306f\u300c\u95a2\u9023\u578b\u5c04\u5f71 (associated type projection)\u300d(\u307e\u305f\u306f\u300c\u5c04\u5f71\u578b (projection type)\u300d) \u3067\u3059\u3002<\/p>\n<p>\u53c2\u8003\u300cprojection &#8211; Appendix B: Glossary &#8211; Guide to Rustc Development\u300d<\/p>\n<p>\u3061\u306a\u307f\u306b (\u304a\u305d\u3089\u304f) \u516c\u5f0f\u306e Rust \u3067\u306f\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u304c\u3001\u300c\u95a2\u9023\u578b\u5c04\u5f71 (associated type projection)\u300d\u3067\u306a\u304f\u300c\u30d5\u30a3\u30fc\u30eb\u30c9\u5c04\u5f71 (field projection)\u300d\u306e\u578b\u3092\u300c\u5c04\u5f71\u306e\u578b (projection type)\u300d\u3068\u8868\u8a18\u3059\u308b\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u6587\u8108\u306b\u3088\u3063\u3066\u89e3\u91c8\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h1>2. \u30e1\u30e2\u30ea\u4e0a\u306e\u5834\u6240\u306b\u95a2\u3059\u308b\u300c\u5c04\u5f71 (projection)\u300d\u306e\u4f8b<\/h1>\n<h2>2.1. \u4e2d\u6c34\u6e96\u4e2d\u9593\u8868\u73fe MIR \u3067\u306e\u300c\u30d5\u30a3\u30fc\u30eb\u30c9\u5c04\u5f71 (field projection)\u300d\u306e\u4f8b<\/h2>\n<p>(\u672c\u8a18\u4e8b\u3067\u306f\u300c\u4e2d\u6c34\u6e96\u4e2d\u9593\u8868\u73fe MIR\u300d\u306b\u95a2\u3057\u3066\u306f\u89e6\u308c\u307e\u305b\u3093\u3002)<\/p>\n<p>\u300c\u5c04\u5f71 (projection)\u300d\u306f\u3001\u57fa\u3068\u306a\u308b (\u30e1\u30e2\u30ea\u4e0a\u306e) \u5834\u6240\u304b\u3089\u300c\u7a81\u304d\u51fa\u3055\u308c\u305f (project out)\u300d\u30d5\u30a3\u30fc\u30eb\u30c9\u7b49\u3067\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u30ed\u30fc\u30ab\u30eb\u5909\u6570 _1 \u3092\u57fa\u3068\u306a\u308b\u30d1\u30b9\u3068\u3057\u3001f \u3092\u300c\u5c04\u5f71\u8981\u7d20 (projection element)\u300d\u3068\u3057\u3066\u3001(\u30e1\u30e2\u30ea\u4e0a\u306e) \u5834\u6240 _1.f \u306f\u300c\u5c04\u5f71 (projection)\u300d\u3067\u3059\u3002<\/p>\n<p>(\u30ed\u30fc\u30ab\u30eb\u5909\u6570 _1 \u3082\u5c04\u5f71 _1.f \u3082\u300c(\u30e1\u30e2\u30ea\u4e0a\u306e) \u5834\u6240\u300d\u306b\u542b\u307e\u308c\u307e\u3059\u3002)<\/p>\n<p>\u53c2\u7167\u5916\u3057 *_1 \u3082\u300c\u5c04\u5f71 (projection)\u300d\u306e\u4f8b\u3067\u3059\u3002<\/p>\n<p>\u53c2\u8003\u300cMIR data types &#8211; The MIR (Mid-level IR) &#8211; Guide to Rustc Development\u300d<\/p>\n<p>\u7269\u4f53\u306e\u5f71\u306b\u4f8b\u3048\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059:<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u7269\u4f53: _1 (\u306e\u30e1\u30e2\u30ea\u4e0a\u306e\u5834\u6240)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30b9\u30af\u30ea\u30fc\u30f3\u304a\u3088\u3073\u5149\u306e\u5f53\u3066\u65b9: \u7269\u4f53\u306e f \u306e\u8981\u7d20\u3092\u53d6\u5f97\u3059\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u5f71: _1.f (\u306e\u30e1\u30e2\u30ea\u4e0a\u306e\u5834\u6240)<\/ul>\n<h2>2.2. \u914d\u5217\u3084\u30b9\u30e9\u30a4\u30b9\u306e\u300c\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5c04\u5f71 (index projection)\u300d<\/h2>\n<p>\u914d\u5217\u3084\u30b9\u30e9\u30a4\u30b9\u306b\u95a2\u3057\u3066\u3001\u7279\u5b9a\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u5834\u6240\u3092\u8868\u73fe\u3057\u305f (array[i] \u306e\u3088\u3046\u306a) \u3082\u306e\u3082\u300c\u5c04\u5f71 (projection)\u300d\u3067\u3001\u300c\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5c04\u5f71 (index projection)\u300d\u3068\u547c\u3070\u308c\u307e\u3059\u3002<\/p>\n<p>\u914d\u5217\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5c04\u5f71 (array index projection) \u3092\u5358\u306b\u300c\u914d\u5217\u5c04\u5f71 (array projection)\u300d\u3068\u547c\u3076\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>(\u304a\u305d\u3089\u304f) \u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u3057\u3063\u304b\u308a\u66f8\u304b\u308c\u3066\u3044\u307e\u305b\u3093\u304c\u3001Rust \u306e\u30b3\u30fc\u30c9\u4e2d\u7b49\u3067\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u540d\u79f0\u3067\u3059\u3002<\/p>\n<p>\u53c2\u8003\u300cL231 &#8211; rust\/error.rs at 1.63.0 \u00b7 rust-lang\/rust\u300d<br \/>\n\u53c2\u8003\u300cL932-L933 &#8211; rust\/sugg.rs at 1.63.0 \u00b7 rust-lang\/rust\u300d<br \/>\n\u53c2\u8003\u300cL978 &#8211; rust\/sugg.rs at 1.63.0 \u00b7 rust-lang\/rust\u300d<br \/>\n\u53c2\u8003\u300cL26 &#8211; rust\/const_let_eq.rs at 1.63.0 \u00b7 rust-lang\/rust\u300d<\/p>\n<h2>2.3. \u300c\u5c04\u5f71\u30e1\u30bd\u30c3\u30c9 (projection method)\u300d\u306b\u3088\u3063\u3066\u5f97\u3089\u308c\u308b\u53c2\u7167\u7b49\u306e\u300c\u30d5\u30a3\u30fc\u30eb\u30c9\u5c04\u5f71 (field projection)\u300d<\/h2>\n<p>\u30b2\u30c3\u30bf\u30fc\u30e1\u30bd\u30c3\u30c9\u306b\u3088\u3063\u3066\u53c2\u7167\u7b49\u306e\u300c\u30d5\u30a3\u30fc\u30eb\u30c9\u5c04\u5f71 (field projection)\u300d\u3092\u5f97\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u3068\u304d\u3001\u305d\u306e\u30b2\u30c3\u30bf\u30fc\u30e1\u30bd\u30c3\u30c9\u3092\u300c\u5c04\u5f71\u30e1\u30bd\u30c3\u30c9 (projection method)\u300d\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n<p>(\u203b\u3053\u308c\u306f\u300c\u30e1\u30bd\u30c3\u30c9\u5c04\u5f71 (method projection)\u300d\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002)<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">struct<\/span> <span class=\"n\">Something<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">data<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">impl<\/span> <span class=\"n\">Something<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c1\">\/\/ data \u30e1\u30bd\u30c3\u30c9\u306f\u5c04\u5f71\u30e1\u30bd\u30c3\u30c9<\/span>\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">data<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">self<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"o\">&amp;<\/span><span class=\"nb\">i32<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"o\">&amp;<\/span><span class=\"k\">self<\/span><span class=\"py\">.data<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"c1\">\/\/ data_mut \u30e1\u30bd\u30c3\u30c9\u306f\u5c04\u5f71\u30e1\u30bd\u30c3\u30c9<\/span>\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">data_mut<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"nb\">i32<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"py\">.data<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">foo<\/span> <span class=\"o\">=<\/span> <span class=\"n\">Something<\/span> <span class=\"p\">{<\/span> <span class=\"n\">data<\/span><span class=\"p\">:<\/span> <span class=\"mi\">23<\/span> <span class=\"p\">};<\/span>\r\n\r\n    <span class=\"k\">let<\/span> <span class=\"n\">bar<\/span> <span class=\"o\">=<\/span> <span class=\"n\">foo<\/span><span class=\"nf\">.data<\/span><span class=\"p\">();<\/span> <span class=\"c1\">\/\/ foo.data() \u306f\u30d5\u30a3\u30fc\u30eb\u30c9\u5c04\u5f71<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\"<\/span><span class=\"p\">,<\/span> <span class=\"o\">*<\/span><span class=\"n\">bar<\/span><span class=\"p\">);<\/span>\r\n\r\n    <span class=\"k\">let<\/span> <span class=\"n\">baz<\/span> <span class=\"o\">=<\/span> <span class=\"n\">foo<\/span><span class=\"nf\">.data_mut<\/span><span class=\"p\">();<\/span> <span class=\"c1\">\/\/ foo.data_mut() \u306f\u30d5\u30a3\u30fc\u30eb\u30c9\u5c04\u5f71<\/span>\r\n    <span class=\"o\">*<\/span><span class=\"n\">baz<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">42<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\"<\/span><span class=\"p\">,<\/span> <span class=\"o\">*<\/span><span class=\"n\">baz<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3042\u308b Field \u578b\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u5bfe\u3057\u3066\u3001\u53c2\u7167\u578b &amp;Field \u3084 &amp;mut Field \u3060\u3051\u3067\u306a\u304f\u3001(\u56fa\u5b9a\u3055\u308c\u305f) Pin&lt;&amp;Field&gt; \u3084 Pin&lt;&amp;mut Field&gt; \u578b\u7b49\u3082\u300c\u30d5\u30a3\u30fc\u30eb\u30c9\u5c04\u5f71 (field projection)\u300d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>(Pin \u306b\u95a2\u3057\u3066\u306f\u672c\u8a18\u4e8b\u3067\u306f\u4e0d\u8aac\u660e\u3002)<\/p>\n<p>\u53c2\u8003\u300cgenerate_enum_as_method &#8211; User Manual\u300d<br \/>\n\u53c2\u8003\u300cProjections and Structural Pinning &#8211; std::pin &#8211; Rust\u300d<\/p>\n<h1>3. \u300c\u95a2\u9023\u578b\u5c04\u5f71 (associated type projection)\u300d\u306e\u4f8b<\/h1>\n<h2>3.1. \u30c8\u30ec\u30a4\u30c8\u3092\u89e3\u6c7a\u3059\u308b\u3068\u304d\u306e\u300c\u95a2\u9023\u578b\u5c04\u5f71 (associated type projection)\u300d\u306e\u4f8b<\/h2>\n<p>\u95a2\u9023\u8981\u7d20 (associated item) \u306b\u304a\u3051\u308b\u300c\u5c04\u5f71 (projection)\u300d\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8868\u3055\u308c\u307e\u3059:<\/p>\n<p>P1..Pm \u306f\u578b\u307e\u305f\u306f\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0 P \u306e\u96c6\u5408 (\u7a7a\u96c6\u5408\u306e\u5834\u5408\u3082\u3042\u308a)<\/p>\n<p>P0 \u578b\u306f TraitName \u30c8\u30ec\u30a4\u30c8\u3092\u5b9f\u88c5\u3057\u3066\u3044\u308b\u578b<\/p>\n<p>AssocItem \u306f TraitName \u30c8\u30ec\u30a4\u30c8\u3067\u5ba3\u8a00\u3055\u308c\u3066\u3044\u308b\u95a2\u9023\u8981\u7d20<\/p>\n<pre class=\"post-pre\"><code>Projection = &lt;P0 as TraitName&lt;P1..Pn&gt;&gt;::AssocItem&lt;Pn+1..Pm&gt;\r\n<\/code><\/pre>\n<p>\u95a2\u9023\u8981\u7d20 (associated item) \u304c\u95a2\u9023\u578b (associated type) \u306e\u5834\u5408\u306f\u300c\u95a2\u9023\u578b\u5c04\u5f71 (associated type projection)\u300d(\u307e\u305f\u306f\u300c\u5c04\u5f71\u578b (projection type)\u300d) \u3068\u547c\u3070\u308c\u307e\u3059\u3002<\/p>\n<p>\u53c2\u8003\u300cDomain goals &#8211; Goals and clauses &#8211; Guide to Rustc Development\u300d<\/p>\n<p>\u53c2\u8003\u300cAssociated Items &#8211; The Rust Reference\u300d<\/p>\n<h2>3.2. \u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u306e\u300c\u95a2\u9023\u578b\u5c04\u5f71 (associated type projection)\u300d\u306e\u4f8b<\/h2>\n<p>\u95a2\u9023\u578b (associated type) \u3092\u53c2\u7167\u3059\u308b\u69cb\u6587 Self::Foo \u3084 ::Bar \u7b49\u306f\u5168\u3066\u300c\u95a2\u9023\u578b\u5c04\u5f71 (associated type projection)\u300d(\u307e\u305f\u306f\u300c\u5c04\u5f71\u578b (projection type)\u300d) \u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u578b\u7b49\u3067\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5c04\u5f71\u304c\u3042\u308a\u307e\u3059:<\/p>\n<pre class=\"post-pre\"><code><span class=\"o\">&lt;<\/span><span class=\"n\">T<\/span> <span class=\"k\">as<\/span> <span class=\"nb\">Index<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">I<\/span><span class=\"o\">&gt;&gt;<\/span><span class=\"p\">::<\/span><span class=\"n\">Output<\/span><span class=\"p\">;<\/span>\r\n<span class=\"o\">&lt;<\/span><span class=\"n\">T<\/span> <span class=\"k\">as<\/span> <span class=\"nb\">Iterator<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">::<\/span><span class=\"n\">Item<\/span><span class=\"p\">;<\/span>\r\n<span class=\"o\">&lt;<\/span><span class=\"n\">T<\/span> <span class=\"k\">as<\/span> <span class=\"nb\">IntoIterator<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">::<\/span><span class=\"n\">Item<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u53c2\u8003\u300cIndex in std::ops &#8211; Rust\u300d<br \/>\n\u53c2\u8003\u300cIterator in core::iter &#8211; Rust\u300d<br \/>\n\u53c2\u8003\u300cIntoIterator in std::iter &#8211; Rust\u300d<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Rust \u306e\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u7b49\u3067 &#8220;projection&#8221; \u3068\u3044\u3046\u8a00\u8449\u304c\u4f7f\u308f\u308c\u308b\u3053\u3068\u304c\u3042\u308a [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44995","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>- Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/44995-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"Rust \u306e\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u7b49\u3067 &#8220;projection&#8221; \u3068\u3044\u3046\u8a00\u8449\u304c\u4f7f\u308f\u308c\u308b\u3053\u3068\u304c\u3042\u308a [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/44995-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-03-25T11:05:12+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-30T04:24:25+00:00\" \/>\n<meta name=\"author\" content=\"\u96c5, \u609f\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u96c5, \u609f\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/44995-2\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/44995-2\/\",\"name\":\"- Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\"},\"datePublished\":\"2023-03-25T11:05:12+00:00\",\"dateModified\":\"2024-04-30T04:24:25+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/f044a4b7fa4ee2701702942002419ca6\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/zh\/blog\/44995-2\/\"]}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/\",\"name\":\"Blog - Silicon Cloud\",\"description\":\"\",\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/f044a4b7fa4ee2701702942002419ca6\",\"name\":\"\u96c5, \u609f\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/e71a913e914f1aad1efc391f92084294bac54bc782acd289638580134cf667a6?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/e71a913e914f1aad1efc391f92084294bac54bc782acd289638580134cf667a6?s=96&d=mm&r=g\",\"caption\":\"\u96c5, \u609f\"},\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/author\/yawu\/\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/44995-2\/#local-main-organization-logo\",\"url\":\"\",\"contentUrl\":\"\",\"caption\":\"Blog - Silicon Cloud\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"- Blog - Silicon Cloud","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/zh\/blog\/44995-2\/","og_locale":"zh_CN","og_type":"article","og_description":"Rust \u306e\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u7b49\u3067 &#8220;projection&#8221; 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