{"id":45712,"date":"2023-07-30T18:11:54","date_gmt":"2023-02-28T07:43:03","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45712-2\/"},"modified":"2024-04-30T16:07:46","modified_gmt":"2024-04-30T08:07:46","slug":"45712-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45712-2\/","title":{"rendered":""},"content":{"rendered":"<h1>Rust\u305d\u306e3 Advent Calendar 2019<\/h1>\n<p>\u3053\u306e\u8a18\u4e8b\u306f\u3001Rust\u305d\u306e3 Advent Calendar 2019 5\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002<\/p>\n<p>4\u65e5\u76ee -&gt; cargo publish\u3067\u304d\u306a\u3044Rust\u30d7\u30ed\u30b8\u30a7\u30af\u30c8<br \/>\n6\u65e5\u76ee -&gt; [Rust] Integer\u3068Float\u306e\u4e21\u65b9\u3067max\u304c\u5fc5\u8981\u306a\u3068\u304d<\/p>\n<h1>\u306f\u3058\u3081\u306b<\/h1>\n<p>C\/C++\/Fortran\u306a\u3069\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u7d4c\u9a13\u304c\u3042\u308b\u4eba\u304cRust\u306b\u89e6\u308c\u305f\u3068\u304d\u306b\u3001\u6b21\u306e\u3088\u3046\u306a\u7591\u554f\u306f\u8ab0\u3057\u3082\u611f\u3058\u308b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Rust\u306e\u6587\u5b57\u5217\u306f\u306a\u305cstr\u3067\u306f\u306a\u304f&amp;str\u306a\u306e\uff1f<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Rust\u306e\u30b9\u30e9\u30a4\u30b9\u304c\u4f55\u3092\u6307\u3057\u3066\u3044\u308b\u306e\u304b\u3088\u304f\u5206\u304b\u3089\u306a\u3044<\/ul>\n<p>\u5b9f\u969b\u3001C++\u306b\u304a\u3051\u308b\u90e8\u5206\u6587\u5b57\u5217\u306e\u53c2\u7167\u306fstd::basic_string_view\u3068\u3044\u3046\u666e\u901a\u306e\u30af\u30e9\u30b9\u3067\u8868\u73fe\u3055\u308c\u3066\u3044\u307e\u3059\u3057\u3001\u914d\u5217\u306b\u95a2\u3057\u3066\u3082vector_view\u3068\u3044\u3046\u5916\u90e8\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u307e\u3067\u5b58\u5728\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u305d\u3082\u305d\u3082\u53c2\u7167\u578b\u3068\u306f\u4f55\u3089\u304b\u306e\u5909\u6570\u3078\u306e\u53c2\u7167\u3092\u8868\u3059\u3082\u306e\u306a\u306e\u3067\u3001&amp;str\u3068\u3044\u3046\u578b\u304c\u5b58\u5728\u3059\u308b\u3068\u3044\u3046\u3053\u3068\u306f\u3001\u305d\u306e\u53c2\u7167\u6e90\u3068\u306a\u308bstr\u578b\u306e\u5909\u6570\u304c\u3069\u3053\u304b\u306b\u5b58\u5728\u3059\u308b\u306f\u305a\u306a\u306e\u3067\u3059\u304c\u3001\u6211\u3005\u306f\u305d\u308c\u3092\u898b\u305f\u3053\u3068\u304c\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u3067\u306f\u4e00\u4f53\u3001&amp;str\u578b\u3084&amp;[T]\u578b\u306e\u5909\u6570\u306f\u3069\u3053\u3092\u53c2\u7167\u3057\u3066\u3044\u308b\u306e\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n<p>\u305d\u308c\u3092\u77e5\u308b\u305f\u3081\u306b\u306f\u3001Rust\u306b\u304a\u3051\u308b\u30dd\u30a4\u30f3\u30bf\u306e\u6982\u5ff5\u304b\u3089\u304d\u3061\u3093\u3068\u7406\u89e3\u3057\u76f4\u3055\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<h1>Rust\u306b\u304a\u3051\u308b\u30dd\u30a4\u30f3\u30bf\u578b<\/h1>\n<p>64bit\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u4e0a\u3067\u306f\u3001\u30e1\u30e2\u30ea\u30a2\u30c9\u30ec\u30b9\u306f64bit\u3067\u8868\u73fe\u3055\u308c\u307e\u3059\u3002<br \/>\n\u3053\u308c\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u7d4c\u9a13\u304c\u3042\u308b\u65b9\u306b\u3068\u3063\u3066\u306f\u3082\u306f\u3084\u5e38\u8b58\u3060\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\u3068\u3053\u308d\u3067\u3001C\u3084C++, Rust\u306b\u306f\u30dd\u30a4\u30f3\u30bf\u3068\u3044\u3046\u6982\u5ff5\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n\u3053\u306e\u30dd\u30a4\u30f3\u30bf\u3092\u7528\u3044\u308b\u3068\u3001\u6b21\u306e\u3088\u3046\u306b\u5909\u6570\u3078\u306e\u53c2\u7167\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kt\">int<\/span> <span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>\r\n<span class=\"kt\">int<\/span><span class=\"o\">*<\/span> <span class=\"n\">pa<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">a<\/span><span class=\"p\">;<\/span>\r\n<span class=\"o\">*<\/span><span class=\"n\">pa<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span>\r\n<span class=\"n\">printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"%d<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">a<\/span><span class=\"p\">);<\/span>  <span class=\"c1\">\/\/ =&gt; 2<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u308c\u306f\u3001\u30dd\u30a4\u30f3\u30bf\u5909\u6570\u306e\u5b9f\u4f53\u304c\u30c7\u30fc\u30bf\u306e\u30e1\u30e2\u30ea\u30a2\u30c9\u30ec\u30b9\u3092\u8868\u3057\u3066\u3044\u308b\u304b\u3089\u3067\u3059\u3002<br \/>\n\u306a\u306e\u3067\u3001C\/C++\u306b\u304a\u3044\u3066\u306f\u3001\u3059\u3079\u3066\u306e\u30dd\u30a4\u30f3\u30bf\u5909\u6570\u306f64bit\u3067\u8868\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u300cC\/C++\u300d\u3068\u3060\u3051\u66f8\u3044\u3066Rust\u3092\u9664\u5916\u3057\u305f\u306e\u306b\u306f\u7406\u7531\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>Rust\u306e\u30dd\u30a4\u30f3\u30bf\u306f64bit\u3068\u306f\u9650\u3089\u306a\u3044\u304b\u3089\u3067\u3059\u3002<\/p>\n<h1>Rust\u306e\u30dd\u30a4\u30f3\u30bf\u578b\u306e\u4e2d\u8eab\u3092\u898b\u308b<\/h1>\n<p>\u307e\u305a\u3001Rust\u306e\u5909\u6570\u306e\u30d0\u30a4\u30c8\u5217\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306b\u3001AsRawBytes\u30c8\u30ec\u30a4\u30c8\u3092\u5b9a\u7fa9\u30fb\u5b9f\u88c5\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">trait<\/span> <span class=\"n\">AsRawBytes<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">fn<\/span> <span class=\"n\">as_raw_bytes<\/span><span class=\"o\">&lt;<\/span><span class=\"nv\">'a<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"nv\">'a<\/span> <span class=\"k\">self<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"o\">&amp;<\/span><span class=\"nv\">'a<\/span> <span class=\"p\">[<\/span><span class=\"nb\">u8<\/span><span class=\"p\">];<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">impl<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">T<\/span><span class=\"p\">:<\/span> <span class=\"o\">?<\/span><span class=\"n\">Sized<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">AsRawBytes<\/span> <span class=\"k\">for<\/span> <span class=\"n\">T<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">fn<\/span> <span class=\"n\">as_raw_bytes<\/span><span class=\"o\">&lt;<\/span><span class=\"nv\">'a<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"nv\">'a<\/span> <span class=\"k\">self<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"o\">&amp;<\/span><span class=\"nv\">'a<\/span> <span class=\"p\">[<\/span><span class=\"nb\">u8<\/span><span class=\"p\">]<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">unsafe<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">slice<\/span><span class=\"p\">::<\/span><span class=\"nf\">from_raw_parts<\/span><span class=\"p\">(<\/span>\r\n                <span class=\"k\">self<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"n\">T<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"nb\">u8<\/span><span class=\"p\">,<\/span>\r\n                <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">mem<\/span><span class=\"p\">::<\/span><span class=\"nf\">size_of_val<\/span><span class=\"p\">(<\/span><span class=\"k\">self<\/span><span class=\"p\">))<\/span>\r\n        <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>as_raw_bytes\u95a2\u6570\u306f\u3001\u5909\u6570\u3092\u30d0\u30a4\u30c8\u5217\u3067\u8868\u3057\u305f\u3068\u304d\u306e\u4e2d\u8eab\u3092&amp;[u8]\u578b\u3067\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u306b\u3088\u308a\u3001\u5909\u6570\u306e\u30d0\u30a4\u30c8\u5217\u306e\u4e2d\u8eab\u3092\u898b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">val<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0x1fc4<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{:x?}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">val<\/span><span class=\"nf\">.as_raw_bytes<\/span><span class=\"p\">());<\/span> <span class=\"c\">\/\/ =&gt; [c4, 1f, 0, 0]<\/span>\r\n<\/code><\/pre>\n<p>\u30ea\u30c8\u30eb\u30a8\u30f3\u30c7\u30a3\u30a2\u30f3\u306a\u306e\u3067\u30d0\u30a4\u30c8\u9806\u304c\u9006\u306b\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u307e\u3059\u3002<\/p>\n<h3>\u203b\u8ffd\u8a18\uff082019\/12\/6\uff09<\/h3>\n<p>AsRawBytes\u30c8\u30ec\u30a4\u30c8\u306fUndefined Bahaviour\u3092\u8d77\u3053\u3059\u5371\u967a\u304c\u3042\u308a\u307e\u3059\uff01AsRawBytes\u306e\u4f7f\u7528\u4e0a\u306e\u6ce8\u610f\u70b9\u306b\u3064\u3044\u3066@qnighy \u3055\u3093\u304b\u3089\u30b3\u30e1\u30f3\u30c8\u3092\u9802\u3044\u305f\u306e\u3067\u3001\u662f\u975e\u305d\u3061\u3089\u3082\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>\u666e\u901a\u306e\u30dd\u30a4\u30f3\u30bf\u578b<\/h2>\n<p>\u307e\u305a\u306fi32\u306e\u30dd\u30a4\u30f3\u30bf\u578b\u306b\u3064\u3044\u3066\u898b\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">pval<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"mi\">0x1fc4<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"nb\">i32<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{:x?}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">pval<\/span><span class=\"nf\">.as_raw_bytes<\/span><span class=\"p\">());<\/span>\r\n<span class=\"c\">\/\/ =&gt; [b8, f1, a3, d2, ae, 55, 0, 0]<\/span>\r\n<\/code><\/pre>\n<p>\u304d\u3061\u3093\u30688\u30d0\u30a4\u30c8\uff08 = 64bit\uff09\u3067\u8868\u3055\u308c\u3066\u3044\u307e\u3059\u306d\u3002<\/p>\n<p>\u5f53\u7136\u306a\u304c\u3089\u30e1\u30e2\u30ea\u30a2\u30c9\u30ec\u30b9\uff08\u7d76\u5bfe\u30a2\u30c9\u30ec\u30b9\uff09\u306f\u5b9f\u884c\u3059\u308b\u305f\u3073\u306b\u5909\u308f\u308b\u306e\u3067\u3001\u4e0a\u8a18\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u51fa\u529b\u7d50\u679c\u3082\u6bce\u56de\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>*[T]\u578b<\/h2>\n<p>\u3067\u306f\u3001\u30b9\u30e9\u30a4\u30b9\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u306f\u3069\u3046\u306a\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u5b9f\u9a13\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">s<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">4<\/span><span class=\"p\">];<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">ps<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">s<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"p\">[<\/span><span class=\"nb\">i32<\/span><span class=\"p\">];<\/span>\r\n<span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{:x?}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">ps<\/span><span class=\"nf\">.as_raw_bytes<\/span><span class=\"p\">());<\/span>\r\n<span class=\"c\">\/\/ =&gt; [10, 2, 59, b5, 7f, 55, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0]<\/span>\r\n<\/code><\/pre>\n<p>\u306a\u3093\u3068\u3001\u305f\u3060\u306e\u30dd\u30a4\u30f3\u30bf\u5909\u6570\u306a\u306e\u306b16\u30d0\u30a4\u30c8\u3067\u8868\u73fe\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3>\u30b9\u30e9\u30a4\u30b9\u306e\u5148\u982d\u306e\u30a2\u30c9\u30ec\u30b9\u3068\u6bd4\u8f03\u3059\u308b<\/h3>\n<p>\u3069\u3046\u3044\u3046\u3053\u3068\u3067\u3057\u3087\u3046\u304b\uff1f\u3082\u3046\u5c11\u3057\u7406\u89e3\u3092\u6df1\u3081\u308b\u305f\u3081\u306b\u3001\u30b9\u30e9\u30a4\u30b9\u306e\u5148\u982d\u306e\u30e1\u30e2\u30ea\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\u3057\u3066\u6bd4\u8f03\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">s<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">4<\/span><span class=\"p\">];<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">ps<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">s<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"p\">[<\/span><span class=\"nb\">i32<\/span><span class=\"p\">];<\/span>\r\n<span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{:x?}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">ps<\/span><span class=\"nf\">.as_raw_bytes<\/span><span class=\"p\">());<\/span>\r\n<span class=\"c\">\/\/ =&gt; [10, 92, c6, cf, 5b, 55, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0]<\/span>\r\n\r\n<span class=\"k\">let<\/span> <span class=\"n\">pval<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">s<\/span><span class=\"p\">[<\/span><span class=\"mi\">0<\/span><span class=\"p\">]<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"nb\">i32<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{:x?}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">pval<\/span><span class=\"nf\">.as_raw_bytes<\/span><span class=\"p\">());<\/span>\r\n<span class=\"c\">\/\/ =&gt; [10, 92, c6, cf, 5b, 55, 0, 0]<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u308c\u3089\u306e\u30dd\u30a4\u30f3\u30bf\u5909\u6570\u306e\u6700\u521d\u306e8\u30d0\u30a4\u30c8\u304c\u4e00\u81f4\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u3064\u307e\u308a\u3053\u306e\u90e8\u5206\u304c\u914d\u5217\u306e\u6700\u521d\u306e\u8981\u7d20\u306e\u30e1\u30e2\u30ea\u30a2\u30c9\u30ec\u30b9\u3092\u6307\u3057\u3066\u3044\u308b\u3068\u4e88\u60f3\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u6b8b\u308b8\u30d0\u30a4\u30c8\u306e\u90e8\u5206\u306f\u3001\u6574\u6570\u3067\u8868\u3059\u30683\u306b\u306a\u308b\u306e\u3067\u3001\u30b9\u30e9\u30a4\u30b9\u306e\u9577\u3055\u3092\u8868\u3057\u3066\u3044\u308b\u3068\u4e88\u60f3\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>*str\u578b<\/h2>\n<p>\u6b63\u89e3\u3092\u898b\u308b\u524d\u306b\u3001\u4eca\u5ea6\u306f*str\u306e\u4e2d\u8eab\u3092\u898b\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">apple<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"apple\"<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"nb\">str<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{:x?}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">apple<\/span><span class=\"nf\">.as_raw_bytes<\/span><span class=\"p\">());<\/span>\r\n<span class=\"c\">\/\/ =&gt; [8, 32, 46, d1, 26, 56, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0]<\/span>\r\n\r\n<span class=\"k\">let<\/span> <span class=\"n\">apple<\/span> <span class=\"o\">=<\/span> <span class=\"n\">apple<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"p\">();<\/span>\r\n<span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{:x?}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">apple<\/span><span class=\"nf\">.as_raw_bytes<\/span><span class=\"p\">());<\/span>\r\n<span class=\"c\">\/\/ =&gt; [8, 32, 46, d1, 26, 56, 0, 0]<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u3061\u3089\u3082\u3001\u5148\u982d8\u30d0\u30a4\u30c8\u304c\u6587\u5b57\u5217\u306e\u5148\u982d\u306e\u30e1\u30e2\u30ea\u30a2\u30c9\u30ec\u30b9\u3067\u3001\u6b8b\u308a8\u30d0\u30a4\u30c8\u304c\u90e8\u5206\u6587\u5b57\u5217\u306e\u9577\u3055\u3092\u8868\u3057\u3066\u3044\u308b\u3068\u4e88\u60f3\u3067\u304d\u307e\u3059\u3002<\/p>\n<h1>*str\u3084*[T]\u306e\u6b63\u4f53<\/h1>\n<p>\u7d50\u8ad6\u304b\u3089\u8a00\u3046\u3068\u3001*str\u3084*[T]\u306f\u3001fat pointer\u3068\u547c\u3070\u308c\u308b\u7279\u6b8a\u306a\u30dd\u30a4\u30f3\u30bf\u578b\u306b\u5206\u985e\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>Jim Blandy and Jason Orendorff\u306b\u3088\u308b&#8221;Programming Rust: Fast, Safe Systems Development&#8221;\u3068\u3044\u3046\u7d20\u6674\u3089\u3057\u3044\u66f8\u7c4d\u304c\u3042\u3063\u305f\u306e\u3067\u305d\u3053\u304b\u3089\u5b9a\u7fa9\u3092\u62dd\u501f\u3059\u308b\u3068\u3001fat pointer\u3068\u306f<\/p>\n<blockquote><p>two-word values carrying the address of some value, along with some further information necessary to put the value to use.<\/p><\/blockquote>\n<p>(\u8a33)<\/p>\n<blockquote><p>\u4f55\u3089\u304b\u306e\u5024\u306e\u30a2\u30c9\u30ec\u30b9\u3068\u3001\u305d\u306e\u5024\u3092\u5229\u7528\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u60c5\u5831\u3092\u683c\u7d0d\u3057\u305f2\u30ef\u30fc\u30c9\u306e\u5024<\/p><\/blockquote>\n<p>\u3064\u307e\u308a\u3001\u5358\u306b\u30e1\u30e2\u30ea\u30a2\u30c9\u30ec\u30b9\u3060\u3051\u3067\u306a\u304f\u3001\u305d\u306e\u5024\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u4ed8\u3051\u52a0\u3048\u305f2\u3064\u306e\u5024\u306e\u30bb\u30c3\u30c8\u3068\u8aad\u307f\u66ff\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u300c\u305d\u306e\u5024\u306b\u95a2\u3059\u308b\u60c5\u5831\u300d\u3068\u306f\u3001*[T]\u306e\u5834\u5408\u306f\u90e8\u5206\u914d\u5217\u306e\u9577\u3055\u3092\u3001*str\u306e\u5834\u5408\u306f\u90e8\u5206\u6587\u5b57\u5217\u306e\u9577\u3055\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u3089\u306e\u4ed6\u306b\u3082\u3001\u4f8b\u3048\u3070\u30c8\u30ec\u30a4\u30c8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3078\u306e\u30dd\u30a4\u30f3\u30bf*SomeTrait\u3082fat pointer\u306b\u5206\u985e\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u306e\u4ed6\u306bvtable\u306e\u30a2\u30c9\u30ec\u30b9\u304c\u683c\u7d0d\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>fat pointer\u306e\u7279\u6027<\/h2>\n<p>fat pointer\u306f\u901a\u5e38\u306e\u30dd\u30a4\u30f3\u30bf\u3068\u306f\u3044\u304f\u3064\u304b\u3053\u3068\u306a\u308b\u6027\u8cea\u3092\u6301\u3064\u306e\u3067\u6ce8\u610f\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>1. fat pointer\u304b\u3089\u901a\u5e38\u306epointer\u3078\u306f\u30ad\u30e3\u30b9\u30c8\u53ef\u80fd\u3002\u9006\u306f\u4e0d\u53ef\u80fd\u3002<\/h3>\n<p>\u30dd\u30a4\u30f3\u30bf\u306e\u69cb\u9020\u3092\u8003\u3048\u308c\u3070\u5f53\u305f\u308a\u524d\u306a\u306e\u3067\u3059\u304c\u3001\u3053\u308c\u3089\u306e\u30ad\u30e3\u30b9\u30c8\u306f\u4e0d\u53ef\u9006\u5909\u63db\u3067\u3059\u3002<br \/>\n\u901a\u5e38\u306e\u30dd\u30a4\u30f3\u30bf\u304b\u3089fat pointer\u3078\u30ad\u30e3\u30b9\u30c8\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">ps<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"p\">[<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">4<\/span><span class=\"p\">]<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"p\">[<\/span><span class=\"nb\">i32<\/span><span class=\"p\">]<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"p\">();<\/span>\r\n\r\n<span class=\"k\">let<\/span> <span class=\"n\">pa<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"mi\">314<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"nb\">i32<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"p\">[<\/span><span class=\"nb\">u8<\/span><span class=\"p\">];<\/span>\r\n<span class=\"c\">\/\/ =&gt; cannot cast thin pointer `*const i32` to fat pointer `*const [u8]`<\/span>\r\n<\/code><\/pre>\n<p>\u305f\u3060\u3057\u3001trait object\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u306e\u307f\u4f8b\u5916\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3042\u308b\u30dd\u30a4\u30f3\u30bf\u578b*T\u304b\u3089\u3001T\u304c\u5b9f\u88c5\u3059\u308b\u30c8\u30ec\u30a4\u30c8SomeTrait\u306e\u30dd\u30a4\u30f3\u30bf\u578b*SomeTrait\u3078\u306e\u30ad\u30e3\u30b9\u30c8\u306f\u6709\u52b9\u3067\u3059\uff08\u30a2\u30c3\u30d7\u30ad\u30e3\u30b9\u30c8\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">stdout<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">io<\/span><span class=\"p\">::<\/span><span class=\"nf\">stdout<\/span><span class=\"p\">();<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">writer<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"n\">stdout<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">io<\/span><span class=\"p\">::<\/span><span class=\"n\">Stdout<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">io<\/span><span class=\"p\">::<\/span><span class=\"n\">Write<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<h3>2. \u4e00\u90e8\u306e\u30dd\u30a4\u30f3\u30bf\u6f14\u7b97\u304c\u7981\u6b62<\/h3>\n<p>fat pointer\u306e\u53c2\u7167\u5148\u306e\u578b\u306f\u901a\u5e38Sized trait\u3092\u5b9f\u88c5\u3057\u3066\u3044\u306a\u3044\u306e\u3067\u3001pointer\u578b\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u307b\u3068\u3093\u3069\u4f7f\u7528\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\uff08\u30c8\u30ec\u30a4\u30c8\u5883\u754c\u3067\u306f\u3058\u304b\u308c\u308b\u305f\u3081\uff09\u3002<\/p>\n<p>fat pointer\u3067\u30a2\u30c9\u30ec\u30b9\u6f14\u7b97\u3092\u884c\u3044\u305f\u3044\u5834\u5408\u306f\u3001\u4e00\u5ea6\u901a\u5e38\u306e\u30dd\u30a4\u30f3\u30bf\u306b\u30ad\u30e3\u30b9\u30c8\u3059\u308b\u3053\u3068\u3067\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">ps<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"p\">[<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">4<\/span><span class=\"p\">]<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"p\">[<\/span><span class=\"nb\">i32<\/span><span class=\"p\">]<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"nb\">i32<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">ps<\/span> <span class=\"o\">=<\/span> <span class=\"n\">ps<\/span><span class=\"nf\">.add<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<h1>\u53c2\u7167\u578b\u306e\u5834\u5408<\/h1>\n<p>\u3053\u3053\u307e\u3067\u306f\u5206\u304b\u308a\u3084\u3059\u304f\u3059\u308b\u305f\u3081\u306b\u6562\u3048\u3066\u30dd\u30a4\u30f3\u30bf\u578b\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u304d\u307e\u3057\u305f\u304c\u3001\u5b9f\u969b\u306b\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u8a18\u8ff0\u3059\u308b\u969b\u306f\u53c2\u7167\u3092\u6271\u3046\u5834\u9762\u306e\u307b\u3046\u304c\u5727\u5012\u7684\u306b\u591a\u3044\u3068\u601d\u308f\u308c\u307e\u3059\u3002<\/p>\n<p>\u3057\u304b\u3057\u53c2\u7167\u578b\u3067\u3042\u3063\u3066\u3082\u4e0a\u8a18\u306e\u30eb\u30fc\u30eb\u306f\u6210\u7acb\u3057\u307e\u3059\u3002<br \/>\n\u3064\u307e\u308a\u3001\uff08\u300c\u53c2\u7167\u5148\u306e\u5909\u6570\u300d\u3067\u306f\u306a\u304f\uff09\u300c\u53c2\u7167\u5909\u6570\u305d\u308c\u81ea\u4f53\u300d\u304c\u3001\u5909\u6570\u306e\u30a2\u30c9\u30ec\u30b9\u3068\u4ed8\u52a0\u60c5\u5831\u3092\u6301\u3063\u3066\u3044\u308b\u3068\u3044\u3046\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>&amp;str\u3084&amp;[T]\u306f\u3069\u3053\u3092\u53c2\u7167\u3057\u3066\u3044\u308b\u306e\u304b<\/h2>\n<p>\u3053\u306e\u554f\u984c\u306b\u5bfe\u3059\u308b\u7b54\u3048\u306f\u3001<\/p>\n<p>&amp;str\u306f\u6587\u5b57\u5217\u306e\u4e00\u90e8\u5206\u3092\u53c2\u7167\u3057\u3066\u3044\u308b<\/p>\n<p>&amp;[T]\u306f\u914d\u5217\u306e\u4e00\u90e8\u5206\u3092\u53c2\u7167\u3057\u3066\u3044\u308b<\/p>\n<p>\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3057\u304b\u3057\u4ed6\u306e\u53c2\u7167\u5909\u6570\u3068\u7570\u306a\u308a\u3001&amp;str\u578b\u3084&amp;[T]\u578b\u306e\u5909\u6570\u305d\u308c\u81ea\u4f53\u304c\u3001\u90e8\u5206\u914d\u5217\u306e\u9577\u3055\u306e\u60c5\u5831\u3082\u6301\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u8a00\u3046\u306a\u308c\u3070\u3001&amp;str\u306fC++\u306estd::basic_string_view\u3001&amp;[T]\u306fvector_view\u3068\u7b49\u4fa1\u306a\u69cb\u9020\u4f53\u3068\u6349\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h1>\u5177\u4f53\u4f8b<\/h1>\n<h2>&amp;[T]<\/h2>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">s<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">7<\/span><span class=\"p\">,<\/span> <span class=\"mi\">3<\/span><span class=\"p\">,<\/span> <span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"mi\">5<\/span><span class=\"p\">];<\/span>\r\n\r\n<span class=\"c\">\/\/ \"1\"\u306e\u4f4d\u7f6e\u306e\u30e1\u30e2\u30ea\u30a2\u30c9\u30ec\u30b9\u3068\u90e8\u5206\u914d\u5217\u306e\u9577\u3055(6)\u3092\u4fdd\u6301<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">ps1<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">s<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c\">\/\/ \"3\"\u306e\u4f4d\u7f6e\u306e\u30e1\u30e2\u30ea\u30a2\u30c9\u30ec\u30b9\u3068\u90e8\u5206\u914d\u5217\u306e\u9577\u3055(4)\u3092\u4fdd\u6301<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">ps2<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">s<\/span><span class=\"p\">[<\/span><span class=\"mi\">2<\/span><span class=\"o\">..<\/span><span class=\"p\">];<\/span>\r\n\r\n<span class=\"c\">\/\/ \"7\"\u306e\u4f4d\u7f6e\u306e\u30e1\u30e2\u30ea\u30a2\u30c9\u30ec\u30b9\u3068\u90e8\u5206\u914d\u5217\u306e\u9577\u3055(2)\u3092\u4fdd\u6301<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">ps3<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">s<\/span><span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"o\">..<\/span><span class=\"mi\">3<\/span><span class=\"p\">];<\/span>\r\n<\/code><\/pre>\n<h2>&amp;str<\/h2>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">s<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"melon\"<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c\">\/\/ \"m\"\u306e\u4f4d\u7f6e\u306e\u30e1\u30e2\u30ea\u30a2\u30c9\u30ec\u30b9\u3068\u90e8\u5206\u914d\u5217\u306e\u9577\u3055(5)\u3092\u4fdd\u6301<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">ps1<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">s<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c\">\/\/ \"l\"\u306e\u4f4d\u7f6e\u306e\u30e1\u30e2\u30ea\u30a2\u30c9\u30ec\u30b9\u3068\u90e8\u5206\u914d\u5217\u306e\u9577\u3055(2)\u3092\u4fdd\u6301<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">ps2<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">s<\/span><span class=\"p\">[<\/span><span class=\"mi\">2<\/span><span class=\"o\">..<\/span><span class=\"mi\">4<\/span><span class=\"p\">];<\/span>\r\n\r\n<span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">segments<\/span> <span class=\"o\">=<\/span> <span class=\"n\">s<\/span><span class=\"nf\">.split<\/span><span class=\"p\">(<\/span><span class=\"s\">\"o\"<\/span><span class=\"p\">);<\/span>\r\n\r\n<span class=\"c\">\/\/ \"m\"\u306e\u4f4d\u7f6e\u306e\u30e1\u30e2\u30ea\u30a2\u30c9\u30ec\u30b9\u3068\u90e8\u5206\u914d\u5217\u306e\u9577\u3055(3)\u3092\u4fdd\u6301<\/span>\r\n<span class=\"k\">let<\/span> <span class=\"n\">ps3<\/span> <span class=\"o\">=<\/span> <span class=\"n\">segments<\/span><span class=\"nf\">.next<\/span><span class=\"p\">()<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n<\/code><\/pre>\n<h1>\u53c2\u8003\u6587\u732e<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Blandy Jim and Orendorff Jason. (2017) Programming Rust : fast, safe systems development. O&#8217;Reilly<\/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\">Rust \u521d\u5fc3\u8005\u304c\u81ea\u52d5\u578b\u5909\u63db\u3084\u578b\u5909\u63db\u95a2\u4fc2\u306e\u30c8\u30ec\u30a4\u30c8\u3092\u81ea\u4fe1\u3092\u6301\u3063\u3066\u6271\u3048\u308b\u3088\u3046\u306b\u306a\u308b\u305f\u3081\u306e\u578b\u5909\u63db\u307e\u3068\u3081 8 \u30d1\u30bf\u30fc\u30f3<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30e1\u30e2\u30ea\u3092\u30c0\u30f3\u30d7\u3057\u3066Rust\u306eslice\u3068Vec\u3092\u7406\u89e3\u3059\u308b &#8211; \u9006\u3055\u307e\u306b\u3057\u305f<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Rust\u305d\u306e3 Advent Calendar 2019 \u3053\u306e\u8a18\u4e8b\u306f\u3001Rust\u305d\u306e3 Advent Calen [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45712","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\/45712-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"Rust\u305d\u306e3 Advent Calendar 2019 \u3053\u306e\u8a18\u4e8b\u306f\u3001Rust\u305d\u306e3 Advent Calen [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45712-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-02-28T07:43:03+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-30T08:07:46+00:00\" \/>\n<meta name=\"author\" content=\"\u6e05, \u626c\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u6e05, \u626c\" \/>\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\/45712-2\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/45712-2\/\",\"name\":\"- Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\"},\"datePublished\":\"2023-02-28T07:43:03+00:00\",\"dateModified\":\"2024-04-30T08:07:46+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/cb5556d2501da73d864cac945e8d9461\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/zh\/blog\/45712-2\/\"]}]},{\"@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\/cb5556d2501da73d864cac945e8d9461\",\"name\":\"\u6e05, \u626c\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/32a4239de8ff29adace466261d309424a1e5fe9f7e3036bf89fe03f2e3dbe717?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/32a4239de8ff29adace466261d309424a1e5fe9f7e3036bf89fe03f2e3dbe717?s=96&d=mm&r=g\",\"caption\":\"\u6e05, \u626c\"},\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/author\/qingyang\/\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/45712-2\/#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\/45712-2\/","og_locale":"zh_CN","og_type":"article","og_description":"Rust\u305d\u306e3 Advent Calendar 2019 \u3053\u306e\u8a18\u4e8b\u306f\u3001Rust\u305d\u306e3 Advent Calen [&hellip;]","og_url":"https:\/\/www.silicloud.com\/zh\/blog\/45712-2\/","og_site_name":"Blog - Silicon Cloud","article_published_time":"2023-02-28T07:43:03+00:00","article_modified_time":"2024-04-30T08:07:46+00:00","author":"\u6e05, \u626c","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"\u6e05, \u626c","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"2 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/zh\/blog\/45712-2\/","url":"https:\/\/www.silicloud.com\/zh\/blog\/45712-2\/","name":"- Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website"},"datePublished":"2023-02-28T07:43:03+00:00","dateModified":"2024-04-30T08:07:46+00:00","author":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/cb5556d2501da73d864cac945e8d9461"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/zh\/blog\/45712-2\/"]}]},{"@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\/cb5556d2501da73d864cac945e8d9461","name":"\u6e05, \u626c","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/32a4239de8ff29adace466261d309424a1e5fe9f7e3036bf89fe03f2e3dbe717?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/32a4239de8ff29adace466261d309424a1e5fe9f7e3036bf89fe03f2e3dbe717?s=96&d=mm&r=g","caption":"\u6e05, \u626c"},"url":"https:\/\/www.silicloud.com\/zh\/blog\/author\/qingyang\/"},{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/45712-2\/#local-main-organization-logo","url":"","contentUrl":"","caption":"Blog - Silicon Cloud"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/45712","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/comments?post=45712"}],"version-history":[{"count":2,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/45712\/revisions"}],"predecessor-version":[{"id":92910,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/45712\/revisions\/92910"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/media?parent=45712"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/categories?post=45712"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/tags?post=45712"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}