{"id":45707,"date":"2023-06-04T13:05:45","date_gmt":"2023-05-09T19:38:38","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45707-2\/"},"modified":"2024-04-30T07:18:17","modified_gmt":"2024-04-29T23:18:17","slug":"45707-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45707-2\/","title":{"rendered":""},"content":{"rendered":"<p>\u3053\u306e\u8a18\u4e8b\u306fRust Advent Calendar 2020\u306e 10 \u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">9 \u65e5\u76ee\u306f\u3053\u3061\u3089 \u2192 no_std \u306e Rust on Linux \u3067 Hello, world!\u3059\u308b &#8211; Qiita<\/ul>\n<\/li>\n<\/ul>\n<p>11 \u65e5\u76ee\u306f\u3053\u3061\u3089 \u2192 Rust\u306e\u578b\u30b7\u30b9\u30c6\u30e0\u306e\u6069\u6075\uff1a\u8a00\u8a9e\u51e6\u7406\u7cfb\u3068\u3057\u3066\u306e\u89b3\u70b9\u304b\u3089 &#8211; Qiita<\/p>\n<p>\u3053\u3093\u306b\u3061\u306f\u3001@tasshi \u3067\u3059\u3002<br \/>\n\u540c\u65e5\u306b\u3046\u3063\u304b\u308a\u3082\u3046 1 \u3064\u30a2\u30c9\u30d9\u30f3\u30c8\u30ab\u30ec\u30f3\u30c0\u30fc\u3092\u767b\u9332\u3057\u3066\u3044\u30661\u3001<br \/>\n\u614c\u3066\u3066\u66f8\u3044\u3066\u3044\u308b\u3046\u3061\u306b\u3053\u3061\u3089\u306f 1 \u65e5\u9045\u308c\u3068\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002<\/p>\n<p>\u307e\u3060 11 \u65e5\u672a\u660e\u306a\u306e\u3067\u30bb\u30fc\u30d5\u3060\u3068\u4fe1\u3058\u3066\u5f37\u3044\u6c17\u6301\u3061\u3067\u6295\u7a3f\u3057\u307e\u3059\u3002<\/p>\n<h1>\u6982\u8981<\/h1>\n<p>Rust \u306e Re-export \u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u8abf\u3079\u3066\u3044\u305f\u3068\u3053\u308d\u3001\u6c17\u306b\u306a\u308b\u30c8\u30d4\u30c3\u30af\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n<p>Guidance around reexporting \u00b7 Issue #176 \u00b7 rust-lang\/api-guidelines<\/p>\n<p>\u3056\u3063\u304f\u308a\u3068\u8aac\u660e\u3059\u308b\u3068\u3001<br \/>\n\u300c\u516c\u958b\u3057\u3066\u3044\u308b API \u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u5916\u90e8\u30af\u30ec\u30fc\u30c8\u3092\u5229\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001<br \/>\n\u305d\u306e\u5916\u90e8\u30af\u30ec\u30fc\u30c8\u5168\u4f53\u3092 Re-export(\u518d\u516c\u958b)\u3059\u308b\u306e\u304c\u826f\u3044\u300d<br \/>\n\u3068\u3044\u3046\u5185\u5bb9\u3067\u3059\u3002<\/p>\n<p>\u73fe\u5728\u3082 Open issue \u306e\u305f\u3081\u4eca\u5f8c\u65b9\u91dd\u304c\u5909\u308f\u308b\u53ef\u80fd\u6027\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u73fe\u6642\u70b9\u3067\u306f\u3053\u308c\u304c\u4e00\u756a\u826f\u3055\u305d\u3046\u3068\u3044\u3046\u3053\u3068\u3067\u8a18\u4e8b\u306b\u66f8\u304d\u8d77\u3053\u3057\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n<h1>Re-exporting(\u518d\u516c\u958b)\u306b\u3064\u3044\u3066<\/h1>\n<p>pub\u30ad\u30fc\u30ef\u30fc\u30c9\u3068use\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u3001\u30b9\u30b3\u30fc\u30d7\u306b\u6301\u3061\u8fbc\u3093\u3060\u540d\u524d\u3092\u5916\u306b\u5bfe\u3057\u3066\u516c\u958b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n\u3053\u308c\u3092Re-exporting(\u518d\u516c\u958b)\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">pub<\/span> <span class=\"k\">mod<\/span> <span class=\"n\">public_module<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">mod<\/span> <span class=\"n\">submodule_in_public<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">my_function<\/span><span class=\"p\">()<\/span> <span class=\"p\">{}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">mod<\/span> <span class=\"n\">private_module<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">mod<\/span> <span class=\"n\">submodule_in_private<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">my_function<\/span><span class=\"p\">()<\/span> <span class=\"p\">{}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">pub<\/span> <span class=\"k\">use<\/span> <span class=\"nn\">crate<\/span><span class=\"p\">::<\/span><span class=\"nn\">private_module<\/span><span class=\"p\">::<\/span><span class=\"n\">submodule_in_private<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/\u975e\u516c\u958b\u30b5\u30d6\u30e2\u30b8\u30e5\u30fc\u30eb\u304b\u3089Re-export<\/span>\r\n<span class=\"k\">pub<\/span> <span class=\"k\">use<\/span> <span class=\"nn\">crate<\/span><span class=\"p\">::<\/span><span class=\"nn\">public_module<\/span><span class=\"p\">::<\/span><span class=\"n\">submodule_in_public<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/\u516c\u958b\u30b5\u30d6\u30e2\u30b8\u30e5\u30fc\u30eb\u304b\u3089Re-export<\/span>\r\n<\/code><\/pre>\n<p>TRPL (en): Bringing Paths Into Scope with the use Keyword &#8211; The Rust Programming Language<br \/>\nTRPL (ja): use \u30ad\u30fc\u30ef\u30fc\u30c9\u3067\u30d1\u30b9\u3092\u30b9\u30b3\u30fc\u30d7\u306b\u6301\u3061\u8fbc\u3080 &#8211; The Rust Programming Language \u65e5\u672c\u8a9e\u7248<\/p>\n<p>Re-export \u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5834\u9762\u3067\u52b9\u679c\u3092\u767a\u63ee\u3057\u307e\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u968e\u5c64\u306e\u6df1\u3044\u30b5\u30d6\u30e2\u30b8\u30e5\u30fc\u30eb\u304b\u3089\u5916\u90e8\u516c\u958b\u3059\u308b\u3082\u306e\u3092\u6d45\u3044\u968e\u5c64\u3078\u53d6\u308a\u51fa\u3059<\/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\">\u975e\u516c\u958b\u30b5\u30d6\u30e2\u30b8\u30e5\u30fc\u30eb\u3067\u5b9f\u88c5\u3092\u96a0\u853d\u3057\u3064\u3064\u516c\u958b\u7528\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u307f\u516c\u958b\u3059\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u5916\u90e8\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u30af\u30ec\u30fc\u30c8\u306e\u4e00\u90e8\u3068\u3057\u3066\u516c\u958b\u3059\u308b<\/ul>\n<p>Rust \u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u30b7\u30b9\u30c6\u30e0\u306b\u3064\u3044\u3066\u306f \u03baeen \u3055\u3093\u306e\u8a18\u4e8b\u3092\u8aad\u3080\u306e\u304c\u304a\u3059\u3059\u3081\u3067\u3059\u3002<br \/>\nRust \u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u4f7f\u3044\u65b9 2018 Edition \u7248 | \u03baeen \u306e Happy Hac\u03baing Blog<\/p>\n<h1>\u516c\u958b API \u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u4ed6\u306e\u30af\u30ec\u30fc\u30c8\u306e\u578b\u3092\u53d7\u3051\u53d6\u308b\/\u8fd4\u3059<\/h1>\n<p>\u3055\u3066\u3001\u672c\u984c\u306b\u5165\u308a\u307e\u3059\u3002<br \/>\n\u516c\u958b API \u304c\u5916\u90e8\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u63d0\u4f9b\u3059\u308b\u578b\u3092\u53d7\u3051\u53d6\u3063\u305f\u308a\u3001\u8fd4\u3057\u305f\u308a\u3059\u308b\u5834\u5408\u3092\u8003\u3048\u307e\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u306f\u67b6\u7a7a\u306e\u30af\u30ec\u30fc\u30c8imgconverter\u3092\u4f8b\u3068\u3057\u3066\u9032\u3081\u3066\u3044\u304d\u307e\u3059\u3002<br \/>\nimgconverter\u306fimage::DynamicImage\u3092\u53d7\u3051\u53d6\u3063\u3066\u4f55\u304b\u3057\u3089\u306e\u5909\u63db\u3092\u884c\u3046\u95a2\u6570convert_image\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">use<\/span> <span class=\"nn\">image<\/span><span class=\"p\">::<\/span><span class=\"n\">DynamicImage<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">convert_image<\/span><span class=\"p\">(<\/span><span class=\"n\">image<\/span><span class=\"p\">:<\/span> <span class=\"n\">DynamicImage<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">DynamicImage<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ \u306a\u3093\u3089\u304b\u306e\u51e6\u7406<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u308c\u3092\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5074\u3067\u5229\u7528\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<br \/>\nmain.rs\u3067\u306fimage::DynamicImage\u3092\u751f\u6210\u3057\u3001convert_image\u95a2\u6570\u3067\u5909\u63db\u3092\u884c\u3044\u307e\u3059\u3002<br \/>\nCargo.toml \u306b\u306f crates.io \u304b\u3089image\u30af\u30ec\u30fc\u30c8\u3092\u63a2\u3057\u3066\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u6301\u3063\u3066\u304d\u307e\u3059\u30022<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">use<\/span> <span class=\"nn\">image<\/span><span class=\"p\">::<\/span><span class=\"n\">DynamicImage<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">imgconverter<\/span><span class=\"p\">::<\/span><span class=\"n\">convert_image<\/span><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=\"n\">src_image<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">DynamicImage<\/span><span class=\"p\">::<\/span><span class=\"nf\">new_rgb8<\/span><span class=\"p\">(<\/span><span class=\"mi\">800<\/span><span class=\"p\">,<\/span> <span class=\"mi\">600<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">dst_image<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">convert_image<\/span><span class=\"p\">(<\/span><span class=\"n\">src_image<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"c\"># \u4e00\u90e8\u629c\u7c8b<\/span>\r\n<span class=\"nn\">[dependencies]<\/span>\r\n<span class=\"py\">image<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.23.12\"<\/span>\r\n<\/code><\/pre>\n<p>\u305d\u308c\u3067\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"post-pre\"><code>\u276f cargo build\r\n   Compiling app v0.1.0\r\nerror[E0308]: mismatched types\r\n --&gt; src\/bin\/main.rs:6:35\r\n  |\r\n6 |     let dst_image = convert_image(src_image);\r\n  |                                   ^^^^^^^^^ expected enum `image::dynimage::DynamicImage`, found enum `image::DynamicImage`\r\n  |\r\n  = note: perhaps two different versions of crate `image` are being used?\r\n\r\nerror: aborting due to previous error\r\n\r\nFor more information about this error, try `rustc --explain E0308`.\r\nerror: could not compile `app`.\r\n<\/code><\/pre>\n<p>\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3068\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002<\/p>\n<h3>\u539f\u56e0<\/h3>\n<p>\u5b9f\u306fimgconverter\u306f\u5c11\u3057\u53e4\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u306eimage\u30af\u30ec\u30fc\u30c8\u306b\u4f9d\u5b58\u3057\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c\"># \u4e00\u90e8\u629c\u7c8b<\/span>\r\n<span class=\"nn\">[dependencies]<\/span>\r\n<span class=\"py\">image<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.19.0\"<\/span>\r\n<\/code><\/pre>\n<p>\u5f15\u6570\u3068\u3057\u3066\u4e0e\u3048\u3089\u308c\u305fimage::DynamicImage\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304c0.23.12\u3067\u3042\u308b\u306e\u306b\u5bfe\u3057\u3066\u3001<br \/>\nconvert_image\u306e\u8981\u6c42\u3059\u308bimage::DynamicImage\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306f0.19.0\u3067\u3059\u3002<\/p>\n<p>\u8981\u6c42\u3059\u308b\u30d0\u30fc\u30b8\u30e7\u30f3\u3068\u4e0e\u3048\u3089\u308c\u305f\u30d0\u30fc\u30b8\u30e7\u30f3\u3068\u304c\u9055\u3046\u305f\u3081\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>\u4f9d\u5b58\u3059\u308b\u578b\u3092 Re-export \u3059\u308b<\/h2>\n<p>\u5148\u307b\u3069\u306e\u30a8\u30e9\u30fc\u306f\u3001\u30e9\u30a4\u30d6\u30e9\u30ea\u30af\u30ec\u30fc\u30c8\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u78ba\u8a8d\u3057\u3066\u9069\u5207\u306a\u30d0\u30fc\u30b8\u30e7\u30f3\u306eimage\u30af\u30ec\u30fc\u30c8\u3092\u4f7f\u3046\u3053\u3068\u3067\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n\u3057\u304b\u3057\u3001\u30af\u30ec\u30fc\u30c8\u306e\u5229\u7528\u8005\u306b\u6bce\u56de\u9069\u5207\u306a\u30d0\u30fc\u30b8\u30e7\u30f3\u306eimage\u30af\u30ec\u30fc\u30c8\u3092\u898b\u3064\u3051\u3055\u305b\u308b\u306e\u306f\u958b\u767a\u4f53\u9a13\u304c\u826f\u3044\u3068\u306f\u8a00\u3048\u307e\u305b\u3093\u3002<\/p>\n<p>\u5229\u7528\u8005\u3092\u30d0\u30fc\u30b8\u30e7\u30f3\u9055\u3044\u306e\u30b9\u30c8\u30ec\u30b9\u304b\u3089\u958b\u653e\u3059\u308b\u305f\u3081\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u578b\u3092 Re-export \u3057\u3066\u3042\u3052\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u65b0\u3057\u3044imgconverter\u3067\u306fimage::DynamicImage\u3092\u305d\u306e\u307e\u307e\u518d\u516c\u958b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">pub<\/span> <span class=\"k\">use<\/span> <span class=\"nn\">image<\/span><span class=\"p\">::<\/span><span class=\"n\">DynamicImage<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">convert_image<\/span><span class=\"p\">(<\/span><span class=\"n\">image<\/span><span class=\"p\">:<\/span> <span class=\"n\">DynamicImage<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">DynamicImage<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ \u306a\u3093\u3089\u304b\u306e\u51e6\u7406<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">image<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5074\u3067\u306fimgconverter::DynamicImage\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u9069\u5207\u306a\u30d0\u30fc\u30b8\u30e7\u30f3\u306eDynamicImage\u3092\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">use<\/span> <span class=\"nn\">imgconverter<\/span><span class=\"p\">::{<\/span><span class=\"n\">convert_image<\/span><span class=\"p\">,<\/span> <span class=\"n\">DynamicImage<\/span><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=\"n\">src_image<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">DynamicImage<\/span><span class=\"p\">::<\/span><span class=\"nf\">new_rgb8<\/span><span class=\"p\">(<\/span><span class=\"mi\">800<\/span><span class=\"p\">,<\/span> <span class=\"mi\">600<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">dst_image<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">convert_image<\/span><span class=\"p\">(<\/span><span class=\"n\">src_image<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u308c\u3067main.rs\u304c\u6b63\u5e38\u306b\u30d3\u30eb\u30c9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<h2>\u8fd4\u308a\u5024\u306b\u3055\u3089\u306b\u64cd\u4f5c\u3092\u52a0\u3048\u308b<\/h2>\n<p>\u307e\u3060\u5341\u5206\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u5909\u63db\u3055\u308c\u305fdst_image\u306b\u3055\u3089\u306b\u753b\u50cf\u51e6\u7406\u3092\u52a0\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<br \/>\nimage::imageops\u306b\u306fDynamicImage\u306b\u5bfe\u3059\u308b\u69d8\u3005\u306a\u753b\u50cf\u51e6\u7406\u95a2\u6570\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u300234<\/p>\n<p>\u4eca\u56de\u306fimage::imageops::flip_horizontal\u3092\u5229\u7528\u3057\u3066\u753b\u50cf\u3092\u5de6\u53f3\u53cd\u8ee2\u3057\u307e\u3059\u3002<br \/>\n\u3055\u3066\u3069\u3046\u306a\u308b\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">use<\/span> <span class=\"nn\">image<\/span><span class=\"p\">::<\/span><span class=\"n\">imageops<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">imgconverter<\/span><span class=\"p\">::{<\/span><span class=\"n\">convert_image<\/span><span class=\"p\">,<\/span> <span class=\"n\">DynamicImage<\/span><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=\"n\">src_image<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">DynamicImage<\/span><span class=\"p\">::<\/span><span class=\"nf\">new_rgb8<\/span><span class=\"p\">(<\/span><span class=\"mi\">800<\/span><span class=\"p\">,<\/span> <span class=\"mi\">600<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">dst_image<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">convert_image<\/span><span class=\"p\">(<\/span><span class=\"n\">src_image<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nn\">imageops<\/span><span class=\"p\">::<\/span><span class=\"nf\">flip_horizontal<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"n\">dst_image<\/span><span class=\"p\">);<\/span>  <span class=\"c\">\/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u308c\u3082\u30d0\u30fc\u30b8\u30e7\u30f3\u9055\u3044\u3067\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u3088\u3046\u306b\u76f4\u63a5\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u5229\u7528\u3057\u3066\u3044\u308b\u578b\u3060\u3051\u3092 Re-export \u3057\u3066\u3082\u3001\u305d\u306e\u30af\u30ec\u30fc\u30c8\u306e\u4ed6\u306e\u6a5f\u80fd\u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<h2>\u4f9d\u5b58\u3059\u308b\u578b\u3092\u542b\u3080\u30af\u30ec\u30fc\u30c8\u5168\u4f53\u3092 Re-export \u3059\u308b<\/h2>\n<p>\u3053\u308c\u3092\u9632\u3050\u305f\u3081\u306b\u30bf\u30a4\u30c8\u30eb\u3067\u51fa\u3066\u304d\u305f\u30af\u30ec\u30fc\u30c8\u5168\u4f53\u306e Re-export \u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n<p>imgconverter\u3067\u306fimage\u3092\u518d\u516c\u958b\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">pub<\/span> <span class=\"k\">use<\/span> <span class=\"n\">image<\/span><span class=\"p\">;<\/span> <span class=\"c\">\/\/image\u30af\u30ec\u30fc\u30c8\u5168\u4f53\u3092Re-export<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">image<\/span><span class=\"p\">::<\/span><span class=\"n\">DynamicImage<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">convert_image<\/span><span class=\"p\">(<\/span><span class=\"n\">image<\/span><span class=\"p\">:<\/span> <span class=\"n\">DynamicImage<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">DynamicImage<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ \u306a\u3093\u3089\u304b\u306e\u51e6\u7406<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">image<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<\/code><\/pre>\n<p>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5074\u3067\u306f\u518d\u516c\u958b\u3055\u308c\u305fimgconverter::image\u3092\u5229\u7528\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">use<\/span> <span class=\"nn\">imgconverter<\/span><span class=\"p\">::<\/span><span class=\"n\">convert_image<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">imgconverter<\/span><span class=\"p\">::<\/span><span class=\"nn\">image<\/span><span class=\"p\">::{<\/span><span class=\"n\">imageops<\/span><span class=\"p\">,<\/span> <span class=\"n\">DynamicImage<\/span><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=\"n\">src_image<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">DynamicImage<\/span><span class=\"p\">::<\/span><span class=\"nf\">new_rgb8<\/span><span class=\"p\">(<\/span><span class=\"mi\">800<\/span><span class=\"p\">,<\/span> <span class=\"mi\">600<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">dst_image<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">convert_image<\/span><span class=\"p\">(<\/span><span class=\"n\">src_image<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nn\">imageops<\/span><span class=\"p\">::<\/span><span class=\"nf\">flip_horizontal<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"n\">dst_image<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u308c\u3067\u5229\u7528\u8005\u306f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u5229\u7528\u3055\u308c\u3066\u3044\u308b\u30af\u30ec\u30fc\u30c8\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u610f\u8b58\u3057\u306a\u304f\u3066\u826f\u304f\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<h2>\u691c\u8a3c\u30b3\u30fc\u30c9<\/h2>\n<p>\u4e0a\u8a18\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u9055\u3044\u306e\u30b3\u30fc\u30c9\u3082\u542b\u307e\u308c\u3066\u3044\u308b\u306e\u3067\u30d3\u30eb\u30c9\u306f\u3067\u304d\u307e\u305b\u3093\u3002<br \/>\nmshrtsr\/rust-re-export-dependencies: Investigation for usage of &#8220;Re-exporting&#8221;<\/p>\n<h2>\u53c2\u8003\u30da\u30fc\u30b8<\/h2>\n<p>RFC API guideline &#8211; re-export a whole crate if exporting any &#8211; The Rust Programming Language Forum<\/p>\n<p>quickcheck\u30af\u30ec\u30fc\u30c8\uff08\u30e9\u30f3\u30c0\u30e0\u30c6\u30b9\u30c8\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\uff09\u304crand::Rng\u3060\u3051\u3092\u518d\u516c\u958b\u3057\u3066\u3044\u3066\u3001\u5229\u7528\u8005\u304c\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u610f\u8b58\u3057\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u3053\u3068\u306b\u3064\u3044\u3066\u306e\u6295\u7a3f<br \/>\n\u672c\u7b4b\u3068\u306f\u95a2\u4fc2\u306a\u3044\u3051\u3069\u3001\u30d0\u30fc\u30b8\u30e7\u30f3 1.0 \u4ee5\u4e0a\u306e\u30af\u30ec\u30fc\u30c8\u306a\u3093\u304b\u307b\u3068\u3093\u3069\u306a\u3044\u3060\u308d\u3063\u3066\u8a00\u308f\u308c\u3066\u3061\u3087\u3063\u3068\u7b11\u3063\u305f<\/p>\n<p>Crates which re-export types from other crates should also re-export the entire crate \u00b7 Issue #170 \u00b7 rust-lang\/api-guidelines<\/p>\n<p>\u4e0a\u306e\u8b70\u8ad6\u306e API guideline \u672c\u4f53\u3078\u306e issue<br \/>\n&gt; This has the problem that all users of quickcheck need to depend on the same version of rand as quickcheck if they want to use the rest of rand&#8217;s API.<\/p>\n<p>Guidance around reexporting \u00b7 Issue #176 \u00b7 rust-lang\/api-guidelines<\/p>\n<p>\u304a\u305d\u3089\u304f\u73fe\u6642\u70b9(2020\/12\/11)\u3067\u6700\u65b0\u306e\u8b70\u8ad6<br \/>\n&gt; If your crate has a public dependency, then the corresponding crate should be reexported by your crate (via pub extern).<\/p>\n<h2>\u4f59\u8ac7<\/h2>\n<p>\u3053\u308c\u3063\u3066\u4f9d\u5b58\u30e9\u30a4\u30d6\u30e9\u30ea\u540c\u58eb\u3067 Re-export \u3057\u3066\u3044\u308b\u30af\u30ec\u30fc\u30c8\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u9055\u3063\u305f\u5834\u5408\u3069\u3046\u3059\u308b\u3093\u3067\u3059\u304b\u306d\u3002<\/p>\n<div>\n<p>kintone\u3067\u4ed6\u306e\u30e6\u30fc\u30b6\u306e\u4e88\u5b9a\u3092\u78ba\u8a8d\u3059\u308bJS\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3092\u4f5c\u308b &#8211; Qiita\u00a0\u21a9<\/p>\n<p>image &#8211; crates.io: Rust Package Registry\u00a0\u21a9<\/p>\n<p>image::imageops &#8211; Rust\u00a0\u21a9<\/p>\n<p>\u6b63\u78ba\u306b\u306fimage\u30af\u30ec\u30fc\u30c8\u306e\u63d0\u4f9b\u3059\u308b\u753b\u50cf\u7cfb\u306e\u578b\u5168\u822c\u306b\u5bfe\u3059\u308b\u753b\u50cf\u51e6\u7406\u95a2\u6570\u7fa4\u3067\u3059\u00a0\u21a9<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u306e\u8a18\u4e8b\u306fRust Advent Calendar 2020\u306e 10 \u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002 9 \u65e5\u76ee\u306f\u3053\u3061\u3089 \u2192  [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45707","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\/45707-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u3053\u306e\u8a18\u4e8b\u306fRust Advent Calendar 2020\u306e 10 \u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002 9 \u65e5\u76ee\u306f\u3053\u3061\u3089 \u2192 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45707-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-05-09T19:38:38+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-29T23:18:17+00:00\" \/>\n<meta name=\"author\" content=\"\u79d1, \u96c5\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u79d1, \u96c5\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 \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\/45707-2\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/45707-2\/\",\"name\":\"- Blog - Silicon 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