{"id":45446,"date":"2023-08-04T12:10:46","date_gmt":"2024-02-02T17:16:52","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45446-2\/"},"modified":"2024-04-30T16:56:39","modified_gmt":"2024-04-30T08:56:39","slug":"45446-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45446-2\/","title":{"rendered":""},"content":{"rendered":"

\u305d\u3082\u305d\u3082Rust\u306b\u306f\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\/\u30c7\u30af\u30ea\u30e1\u30f3\u30c8\u69cb\u6587\u306f\u3042\u308a\u307e\u305b\u3093\u3001\u51aa\u4e57(**)\u306e\u69cb\u6587\u3082\u3042\u308a\u307e\u305b\u3093\u3002
\n(\u4f7f\u3044\u305f\u3044\u5834\u5408\u306f\u305d\u308c\u305e\u308c x += 1; \u3084 pow \u7cfb\u306e\u95a2\u9023\u95a2\u65701\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002)
\n\u306a\u306e\u3067\u53c2\u8003\u8a18\u4e8b\u306e + ++2 \u3084 +++3 \u306e\u3088\u3046\u306a\u904a\u3073\u306f\u51fa\u6765\u307e\u305b\u3093\u3002<\/p>\n

+++3\u306e\u8a18\u4e8b\u3067 &&& \u3068 *** \u304c\u4f7f\u308f\u308c\u3066\u3044\u305f\u306e\u3067\u3001\u305d\u3061\u3089\u3092\u691c\u8a3c\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n

\u524d\u63d0\u6761\u4ef6<\/h2>\n

***\u3092\u7528\u3044\u308b\u6642\u306b\u30c7\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9(Deref)\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3092\u4f7f\u308f\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3059\u3002
\n\u5143\u8a18\u4e8b\u306e\u69cb\u6587\u3068\u306f\u30ba\u30ec\u308b\u306e\u3068\u4f55\u3067\u3082\u51fa\u6765\u3066\u3057\u307e\u3046\u306e\u3067\u3001\u30de\u30af\u30ed\u3092\u4f7f\u308f\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u30de\u30af\u30ed\u7248\u8a18\u4e8b4<\/p>\n

&&& \u306e\u30d1\u30bf\u30fc\u30f3<\/h2>\n

\u59cb\u3081\u306bRust\u306e x && y \u306e\u6f14\u7b97\u5b50\u306e\u4e21\u8fba\u306fJavaScript\u3084C\/C++\u306e\u3088\u3046\u306a\u66d6\u6627\u306a\u8868\u73fe\u306f\u51fa\u6765\u306a\u304f\u3001 bool \u3057\u304b\u53d7\u3051\u5165\u308c\u3066\u304f\u308c\u307e\u305b\u3093\u3002
\n\u305d\u3057\u3066\u3001Rust\u306b\u304a\u3051\u308b x&&&y \u3068\u3044\u3046\u5f0f\u306f x&&(&y) \u3068\u89e3\u91c8\u3055\u308c\u3001 y \u306e\u53c2\u7167\u3092\u4f5c\u308a x \u3068\u8ad6\u7406AND\u6f14\u7b97\u3092\u884c\u3046\u547d\u4ee4\u3068\u306a\u308a\u307e\u3059\u3002
\ntrue && (&false) \u3068\u3044\u3046\u5f0f\u306fRust\u3067\u306f\u578b\u304c\u5408\u3063\u3066\u3044\u306a\u3044\u306e\u3068\u3001\u6697\u9ed9\u306e\u578b\u5909\u63db\u3082\u306a\u3044\u306e\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002
\nx \u3082\u53c2\u7167\u3067\u6301\u3063\u3066 &true && (&false) \u3067\u6f14\u7b97\u3059\u308b\u3057\u304b\u9078\u629e\u80a2\u304c\u306a\u3044\u3067\u3059\u304c\u3001\u3053\u306e\u6f14\u7b97\u3082\u4e0b\u8a18\u306e\u69d8\u306b\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n

fn<\/span> main<\/span>()<\/span> {<\/span>\r\n    \/\/ let compile_error = 1 && 1;<\/span>\r\n    let<\/span> x<\/span> =<\/span> &<\/span>true<\/span>;<\/span>\r\n    let<\/span> y<\/span> =<\/span> false<\/span>;<\/span>\r\n    assert_eq!<\/span>(<\/span>x<\/span>&&&<\/span>y<\/span>,<\/span> false<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
error[E0308]: mismatched types\r\n --<\/span>><\/span> src\/main.rs:5:16\r\n  |\r\n5 |     assert_eq!(<\/span>x&&&y, false<\/span>)<\/span>;<\/span>\r\n  |                ^\r\n  |                |\r\n  |                expected `<\/span>bool`<\/span>, found `<\/span>&bool`<\/span>\r\n  |                help<\/span>: consider dereferencing the borrow: `<\/span>*<\/span>x`<\/span>\r\n\r\nerror[E0308]: mismatched types\r\n --<\/span>><\/span> src\/main.rs:5:19\r\n  |\r\n5 |     assert_eq!(<\/span>x&&&y, false<\/span>)<\/span>;<\/span>\r\n  |                   ^^\r\n  |                   |\r\n  |                   expected `<\/span>bool`<\/span>, found `<\/span>&bool`<\/span>\r\n  |                   help<\/span>: consider removing the borrow: `<\/span>y`<\/span>\r\n<\/code><\/pre>\n
\u3059\u306a\u308f\u3061\u3053\u306e\u30d1\u30bf\u30fc\u30f3\u306f\u51fa\u6765\u306a\u3044\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002
\n\u7406\u7531\u306f\u5358\u7d14\u306b\u30b3\u30f3\u30d1\u30a4\u30e9\u30fc\u304c &bool && (&bool) \u306b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u304b\u3089\u3067\u3059\u3002
\nRust\u3067\u306f\u4e00\u90e8\u306e\u8a18\u8ff0\u30d1\u30bf\u30fc\u30f3\u3067\u306f\u6697\u9ed9\u306e\u53c2\u7167\u5916\u3057\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u306e\u30d1\u30bf\u30fc\u30f3\u3067\u306f\u8d77\u304d\u307e\u305b\u3093\u3002<\/p>\n
*** \u306e\u30d1\u30bf\u30fc\u30f3<\/h2>\n
\u6700\u5f8c\u306b x***y \u306e\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u304c\u3001Rust\u3067\u306f x*(*(*y)) \u3068\u89e3\u91c8\u3055\u308c\u307e\u3059\u3002
\n*y \u306f\u53c2\u7167\u5916\u3057\u306a\u306e\u3067\u7d14\u7c8b\u306b y \u3092 &&y \u3068\u3059\u308c\u3070\u89e3\u6c7a\u51fa\u6765\u305d\u3046\u3067\u3059\u3002<\/p>\n
fn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> z<\/span> =<\/span> &&<\/span>10<\/span>;<\/span>\r\n    assert_eq!<\/span>(<\/span>10<\/span>***<\/span>z<\/span>,<\/span> 100<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4eca\u5ea6\u306f\u3061\u3083\u3093\u3068\u30b3\u30f3\u30d1\u30a4\u30eb\u3055\u308c\u3001\u53c2\u7167\u304c\u5916\u3055\u308c\u3066\u3001\u6700\u5f8c\u306b\u306f 10 * 10 = 100 \u3068\u3044\u3046\u5f0f\u304c\u6210\u308a\u7acb\u3061\u307e\u3057\u305f\u3002<\/p>\n
\u4eca\u56de\u306f\u7121\u7406\u77e2\u7406\u611f\u304c\u3042\u308a\u307e\u3059\u304c\u3001y = &&value; x***y \u3060\u3051\u6210\u7acb\u3059\u308b\u3068\u3044\u3046\u5e0c\u5c11\u306a\u30b1\u30fc\u30b9\u3067\u3057\u305f\u306e\u3067\u3001
\nRust\u3067+++\u306f\u8a31\u3055\u308c\u306a\u3044+ ++\u3082\u8a31\u3055\u308c\u306a\u3044\u3001 &&&\u3082\u8a31\u3055\u308c\u306a\u3044\u3051\u3069***\u306f(\u4e00\u90e8\u306e\u30b1\u30fc\u30b9\u3067)\u8a31\u3055\u308c\u308b\u3068\u3044\u3046\u7d50\u679c\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n
\u77e5\u8b58\u3084\u8a18\u8ff0\u306e\u9593\u9055\u3044\u304c\u3042\u308c\u3070\u3054\u6307\u6458\u3044\u305f\u3060\u3051\u308c\u308b\u3068\u5b09\u3057\u3044\u3067\u3059\u3002<\/p>\n
\n
Results for pow – Rust\u00a0\u21a9<\/p>\n
JavaScript\u3067+++\u306f\u8a31\u3055\u308c\u306a\u3044+ ++\u306f\u8a31\u3055\u308c\u308b\u00a0\u21a9<\/p>\n
C\/C++ \u3067\u306f+++\u306f\u8a31\u3055\u308c\u308b\u00a0\u21a9<\/p>\n
Rust\u3067+++\u3092\u5b9f\u73fe\u3059\u308b\u00a0\u21a9<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
\u305d\u3082\u305d\u3082Rust\u306b\u306f\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\/\u30c7\u30af\u30ea\u30e1\u30f3\u30c8\u69cb\u6587\u306f\u3042\u308a\u307e\u305b\u3093\u3001\u51aa\u4e57(**)\u306e\u69cb\u6587\u3082\u3042\u308a\u307e\u305b\u3093\u3002 (\u4f7f\u3044\u305f\u3044 […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45446","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n- Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/45446-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u305d\u3082\u305d\u3082Rust\u306b\u306f\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\/\u30c7\u30af\u30ea\u30e1\u30f3\u30c8\u69cb\u6587\u306f\u3042\u308a\u307e\u305b\u3093\u3001\u51aa\u4e57(**)\u306e\u69cb\u6587\u3082\u3042\u308a\u307e\u305b\u3093\u3002 (\u4f7f\u3044\u305f\u3044 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45446-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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