{"id":45191,"date":"2022-12-24T02:24:43","date_gmt":"2024-01-17T14:16:22","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45191-2\/"},"modified":"2024-04-29T06:43:47","modified_gmt":"2024-04-28T22:43:47","slug":"45191-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45191-2\/","title":{"rendered":""},"content":{"rendered":"

\u30cf\u30a4\u30b5\u30a4\uff01\u30aa\u30fc\u30b9\u30c6\u30a3\u30f3\u3084\u3044\u3073\u30fc\u3093\uff01<\/p>\n

\u6982\u8981<\/h1>\n

Rust\u306emacro_rules!\u3092\u7d39\u4ecb\u3057\u3001struct\u306eimpl\u30e1\u30bd\u30c3\u30c9\u3067\u4f7f\u3046self\u3092macro\u306e\u4e2d\u3067\u3069\u3046\u3084\u3063\u3066\u53c2\u7167\u3067\u304d\u308b\u304b\u3001\u4e8c\u3064\u306e\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\uff01<\/p>\n

macro_rules!\u3068\u306f\uff1f<\/h1>\n

macro_rules!\u306fRust\u306e\u6a19\u6e96\u6a5f\u80fd\u3067\u3001\u300c\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u304f\u308c\u308b\u30b3\u30fc\u30c9\u300d\u3092\u7c21\u6613\u7684\u306b\u66f8\u304b\u305b\u3066\u304f\u308c\u308b\u6a5f\u80fd\u3067\u3059\u3002<\/p>\n

\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u30b3\u30fc\u30c9\u3001\u3064\u307e\u308a\u30e1\u30bf\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306a\u306e\u3067\u3059\u3002<\/p>\n

Rust\u306b\u306f\u3044\u304f\u3064\u304b\u306e\u30e1\u30bf\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u624b\u6cd5\u304c\u3042\u308a\u307e\u3059\u304c\u3001macro_rules!\u306f\u6700\u3082\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u308b \u5ba3\u8a00\u7684 \u30e1\u30bf\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u30c4\u30fc\u30eb\u3067\u3059\u3002<\/p>\n

\u3044\u304f\u3064\u304b\u306e\u5236\u9650\u304c\u3042\u3063\u305f\u308a\u3057\u307e\u3059\u304c\u3001\u96e3\u3057\u3044\u3068\u8a00\u308f\u308c\u3066\u3044\u308b\u30e1\u30bf\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u4e2d\u3067\u3082\u6bd4\u8f03\u7684\u624b\u3092\u51fa\u3057\u3084\u3059\u3044\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u30e1\u30bf\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0<\/h2>\n

\u30e1\u30bf\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306f\u7121\u8ad6\u3001Rust\u7279\u6709\u306e\u6982\u5ff5\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u5b9f\u306f\u3001\u30e1\u30bf\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306f80\u5e74\u4ee3\u304b\u3089\u65e9\u304f\u3082\u6d41\u884c\u3057\u305f\u6280\u6cd5\u3067\u3059\u3002Lisp\u8a00\u8a9e\u304c\u6d41\u884c\u3089\u305b\u305f\u6982\u5ff5\u3067\u3059\u3002<\/p>\n

\u7c21\u5358\u306b\u3044\u3046\u3068\u3001\u3064\u307e\u308aWikipedia\u901a\u308a\u306b\u3044\u3046\u3068\u3001\u30e1\u30bf\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u5b9a\u7fa9\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u4ed6\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u81ea\u5206\u306e\u30c7\u30fc\u30bf\u3068\u3057\u3066\u6271\u3048\u308b\u3053\u3068\u3067\u3059\u3002\u3068\u3042\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u3001\u81ea\u5206\u306e\u4e2d\u8eab\u3092\u898b\u3066\u3001\u65b0\u305f\u306b\u4f5c\u3063\u305f\u308a\u3001\u5909\u3048\u305f\u308a\u3001\u6d88\u3057\u305f\u308a\u3067\u304d\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n

\u30b3\u30fc\u30c9\u3092\u4f5c\u308b\u30b3\u30fc\u30c9\u3001\u305d\u308c\u304c\u30e1\u30bf\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3002<\/p>\n

\u7c21\u5358\u306a\u4f8b<\/h2>\n

\u3067\u306f\u3001\u7c21\u5358\u306amacro\u3092\u66f8\u3044\u3066\u307f\u308c\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

macro_rules!<\/span> print_ten_lns<\/span> {<\/span>\r\n    (<\/span>$s<\/span>:<\/span> expr<\/span>)<\/span> =><\/span> {<\/span>\r\n        for<\/span> _<\/span> in<\/span> 0<\/span>..<\/span>10<\/span> {<\/span>\r\n            println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> $s<\/span>);<\/span>\r\n        }<\/span>\r\n    };<\/span>\r\n}<\/span>\r\n\r\nprint_ten_lns!<\/span>(<\/span>\"Hello world!\"<\/span>);<\/span>\r\n<\/code><\/pre>\n
macro_rules!\u306e\u5f8c\u306bmacro\u540d\u306b\u306a\u308bprint_ten_lns\u304c\u3042\u308a\u3001\u305d\u306e\u6b21\u306b\u8907\u6570\u306e\u30d1\u30bf\u30fc\u30f3\u3068\u5c55\u958b\u5f8c\u306e\u30b3\u30fc\u30c9\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u3053\u308d\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
($hoge: …)\u3068\u306fmacro\u306e\u5165\u529b\u3068\u306a\u308b\u30d1\u30bf\u30fc\u30f3\u306e\u3053\u3068\u3067\u3059\u3002\u8907\u6570\u306e\u5909\u6570\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002$\u3092\u982d\u306b\u3057\u3066Macro\u306e\u5909\u6570\u540d\u3092\u5b9a\u7fa9\u3057\u3066\u3001\u30b3\u30ed\u30f3:\u306e\u5f8c\u306b\u306f\u3069\u306e\u3088\u3046\u306aMacro\u5909\u6570\u306a\u306e\u304b\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u3044\u304f\u3064\u304b\u306eMacro\u5909\u6570\u306e\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u672c\u8a18\u4e8b\u3067\u306f\u4ee5\u4e0b\u306e\u4e8c\u3064\u306e\u4f7f\u3044\u307e\u3059\u3002<\/p>\n
    \n
  • \n
      expr: \u30a8\u30af\u30b9\u30d7\u30ec\u30c3\u30b7\u30e7\u30f3\u3002Rust\u3060\u3068\u307b\u3068\u3093\u3069\u306e\u3082\u306e\u304c\u3053\u308c\u306b\u8a72\u5f53\u3059\u308b\u3002let hoge = …\u306e…\u306e\u90e8\u5206\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        ident: \u30a2\u30a4\u30c7\u30f3\u30c6\u30a3\u30d5\u30a1\u30a4\u30e4\u30fc\u3002let hoge = “Hello hoge!”;\u306ehoge\u306b\u8a72\u5f53\u3057\u307e\u3059\u3002<\/ul>\n
        \u592a\u3044\u77e2\u5370=>\u3068\u30ab\u30fc\u30ea\u30d6\u30ec\u30fc\u30b9\u306b\u5165\u3063\u3066\u3044\u308b\u306e\u306f\u3001\u5c55\u958b\u5f8c\u306e\u30b3\u30fc\u30c9\u3067\u3059\u3002\u5c55\u958b\u5f8c\u3068\u306f\u3001\u3053\u306eMacro\u3092\u4f7f\u3063\u305f\u6642\u306b\u3001\u5b9f\u969b\u306b\u3069\u306e\u3088\u3046\u306aRust\u30b3\u30fc\u30c9\u306b\u306a\u308b\u304b\u8a18\u8f09\u3059\u308b\u3068\u3053\u308d\u3067\u3059\u3002<\/p>\n
        \u3055\u3089\u306b\u3001\u4efb\u610f\u306e\u6570\u306e\u5909\u6570\u3092\u5165\u529b\u3057\u3066\u5c55\u958b\u3055\u305b\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u4e0a\u8a18\u306e\u4f8b\u306e\u3088\u3046\u306b10\u56de\u30d7\u30ea\u30f3\u30c8\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u4efb\u610f\u306e\u5909\u6570\u306e\u6570\u3092\u30d7\u30ea\u30f3\u30c8\u3057\u305f\u3044\u3068\u306a\u3063\u305f\u3089\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u3051\u307e\u3059\u3002<\/p>\n
        macro_rules!<\/span> printlns<\/span> {<\/span>\r\n    (<\/span>$<\/span>(<\/span>$s:expr<\/span>),<\/span>+<\/span> $<\/span>(,)<\/span>?<\/span>)<\/span> =><\/span> {<\/span>\r\n        $<\/span>(<\/span>println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> $s<\/span>);)<\/span>+<\/span>\r\n    };<\/span>\r\n}<\/span>\r\n\r\nprintlns!<\/span>(<\/span>\"Hello world!\"<\/span>,<\/span> \"Hello Japan!\"<\/span>,<\/span> \"\u3053\u3093\u306b\u3061\u306f\"<\/span>,<\/span> \"\u4f60\u597d\"<\/span>);<\/span>\r\n<\/code><\/pre>\n
        \u30d1\u30bf\u30fc\u30f3\u306b\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u5c11\u3057\u6b63\u898f\u8868\u73fe\u306b\u4f3c\u3066\u3044\u307e\u3059\u3002<\/p>\n
        \u4e0a\u8a18\u306e\u7e70\u308a\u8fd4\u3057\u30d1\u30bf\u30fc\u30f3\u304c\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u306b\u5c55\u958b\u3055\u308c\u307e\u3059\u3002<\/p>\n
        println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> \"Hello world!\"<\/span>);<\/span>\r\nprintln!<\/span>(<\/span>\"{}\"<\/span>,<\/span> \"Hello Japan!\"<\/span>);<\/span>\r\nprintln!<\/span>(<\/span>\"{}\"<\/span>,<\/span> \"\u3053\u3093\u306b\u3061\u306f\"<\/span>);<\/span>\r\nprintln!<\/span>(<\/span>\"{}\"<\/span>,<\/span> \"\u4f60\u597d\"<\/span>);<\/span>\r\n<\/code><\/pre>\n
        Macro\u3092\u4f7f\u3046\u3053\u3068\u3067\u3055\u3073\u305f\u9244\u3067\u3082\u67d4\u8edf\u6027\u3092\u51fa\u3057\u3066\u3001DRY\u3092\u5fb9\u5e95\u3067\u304d\u307e\u3059\u3002<\/p>\n
        macro_rules!\u306b\u3064\u3044\u3066\u304d\u3061\u3093\u3068\u3057\u305f\u8aac\u660e\u304c\u4ee5\u4e0b\u306e\u8cc7\u6599\u306b\u3042\u308a\u307e\u3059\uff01<\/p>\n
         <\/p>\n
        macro_rules!\u3067self\u3092\u53c2\u7167\u3059\u308b<\/h1>\n
        macro_rules!\u306b\u5236\u9650\u304c\u3042\u308b\u3068\u4e0a\u8ff0\u3057\u307e\u3057\u305f\u304c\u3001\u305d\u306e\u4e00\u3064\u306fself\u306e\u6271\u3044\u3067\u3059\u3002\u305d\u306e\u5236\u9650\u306e\u4e2d\u3067\u30e1\u30bd\u30c3\u30c9\u5185\u306emacro\u3067self\u3092\u3069\u3046\u3084\u3063\u3066\u4f7f\u3048\u308b\u306e\u304b\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n
        self\u3092macro\u306e\u5f15\u6570\u3068\u3057\u3066\u6e21\u3059<\/h2>\n
        \u6700\u521d\u306e\u65b9\u6cd5\u306f\u3001self\u3092\u30e1\u30bd\u30c3\u30c9\u5185\u3067macro\u306e\u5f15\u6570\u3068\u3057\u3066\u6e21\u3057\u3066\u3042\u3052\u308b\u3084\u308a\u65b9\u3067\u3059\u3002ident\u578b\u306emacro\u5909\u6570\u3092\u4f7f\u3046\u3068\u6e21\u305b\u307e\u3059\u3002<\/p>\n
        \u4ee5\u4e0b\u306e\u4f8b\u3067\u306f\u3001Option<Vec>\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u305f\u304f\u3055\u3093\u6301\u3063\u3066\u3044\u308b\u30d1\u30e9\u30e1\u30fc\u30bf\u306estruct\u306b\u3001\u30e1\u30bd\u30c3\u30c9\u3067Option\u5185\u306e\u914d\u5217\u306b\u4f55\u304b\u3092\u30d7\u30c3\u30b7\u30e5\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u305f\u3060\u3057\u3001Option<Vec>\u304cNone\u306e\u5834\u5408\u306f\u3001\u7a7a\u306e\u914d\u5217\u3092\u5165\u308c\u305f\u4e0a\u3067\u3001\u30d7\u30c3\u30b7\u30e5\u3059\u308b\u306e\u3067\u3059\u3002<\/p>\n
        macro_rules!<\/span> add_to_vec<\/span> {<\/span>\r\n    (<\/span>$self<\/span>:<\/span> ident<\/span>,<\/span> $prop<\/span>:<\/span> ident<\/span>,<\/span> $v_key<\/span>:<\/span> ident<\/span>)<\/span> =><\/span> {{<\/span>\r\n        let<\/span> vec<\/span> =<\/span> $self<\/span>.$prop<\/span>.get_or_insert<\/span>(<\/span>Vec<\/span>::<\/span>new<\/span>());<\/span>\r\n        vec<\/span>.push<\/span>(<\/span>$v_key<\/span>);<\/span>\r\n\r\n        $self<\/span>\r\n    }};<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
        \u3053\u308c\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30e1\u30bd\u30c3\u30c9\u5185\u3067\u4f7f\u3048\u307e\u3059\u3002<\/p>\n
        impl<\/span><<\/span>'a<\/span>><\/span> ParamBuilder<\/span><<\/span>'a<\/span>><\/span> {<\/span>\r\n\/\/ ...<\/span>\r\n    pub<\/span> fn<\/span> category_name<\/span>(<\/span>mut<\/span> self<\/span>,<\/span> s<\/span>:<\/span> &<\/span>'a<\/span> str<\/span>)<\/span> -><\/span> Self<\/span> {<\/span>\r\n        add_to_vec!<\/span>(<\/span>self<\/span>,<\/span> term_slug_and<\/span>,<\/span> s<\/span>)<\/span>\r\n    }<\/span>\r\n\/\/ ...<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
        \u3053\u308c\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u306b\u5c55\u958b\u3055\u308c\u307e\u3059\u3002<\/p>\n
        pub<\/span> fn<\/span> category_name<\/span>(<\/span>mut<\/span> self<\/span>,<\/span> s<\/span>:<\/span> &<\/span>'a<\/span> str<\/span>)<\/span> -><\/span> Self<\/span> {<\/span>\r\n  let<\/span> vec<\/span> =<\/span> self<\/span>.term_slug_and<\/span>.get_or_insert<\/span>(<\/span>Vec<\/span>::<\/span>new<\/span>());<\/span>\r\n  vec<\/span>.push<\/span>(<\/span>s<\/span>);<\/span>\r\n\r\n  self<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
        \u30e1\u30bd\u30c3\u30c9\u5185\u3067macro_rules!\u3092\u4f7f\u3063\u3066macro\u3092\u5b9a\u7fa9\u3059\u308b<\/h2>\n
        \u4e00\u3064\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u8907\u6570\u56de\u3001\u4f3c\u305f\u3088\u3046\u306a\u30ed\u30b8\u30c3\u30af\u3092\u30b3\u30d4\u30da\u30fc\u3057\u3066\u5909\u6570\u540d\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u540d\u3060\u3051\u3092\u5909\u66f4\u3059\u308b\u3068\u3044\u3046\u7d4c\u9a13\u306f\u3088\u304f\u3042\u308a\u307e\u3059\u304c\u3001\u8aad\u8005\u306f\u5982\u4f55\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n
        \u30e1\u30bd\u30c3\u30c9\u5185\u3067macro_rules!\u3092\u4f7f\u3063\u3066\u5b9a\u7fa9\u3059\u308b\u3068\u3001self\u3092\u76f4\u63a5macro\u306e\u5c55\u958b\u6587\u306e\u4e2d\u3067\u4f7f\u3048\u307e\u3059\u3002<\/p>\n
        impl<\/span><<\/span>'a<\/span>><\/span> QueryBuilder<\/span><<\/span>'a<\/span>><\/span> {<\/span>\r\n\/\/ ...<\/span>\r\n\r\n    pub<\/span> fn<\/span> query<\/span>(<\/span>mut<\/span> self<\/span>)<\/span> -><\/span> QueryAndValues<\/span> {<\/span>\r\n        let<\/span> params<\/span> =<\/span> self<\/span>.params<\/span>;<\/span>\r\n\r\n        macro_rules!<\/span> add_if_some_id<\/span> {<\/span>\r\n            (<\/span>$prop<\/span>:<\/span> ident<\/span>,<\/span> $query<\/span>:<\/span> expr<\/span>)<\/span> =><\/span> {<\/span>\r\n                if<\/span> let<\/span> Some<\/span>(<\/span>id<\/span>)<\/span> =<\/span> params<\/span>.$prop<\/span> {<\/span>\r\n                    self<\/span>.query<\/span>.push_str<\/span>(<\/span>$query<\/span>);<\/span>\r\n                    self<\/span>.values<\/span>.push<\/span>(<\/span>Value<\/span>::<\/span>UInt<\/span>(<\/span>id<\/span>));<\/span>\r\n                }<\/span>\r\n            };<\/span>\r\n        }<\/span>\r\n\r\n        add_if_some_id!<\/span>(<\/span>author<\/span>,<\/span> \" AND post_author = ?\"<\/span>);<\/span>\r\n\r\n        add_if_some_id!<\/span>(<\/span>p<\/span>,<\/span> \" AND wp_post.ID = ?\"<\/span>);<\/span>\r\n\/\/ ...<\/span>\r\n   }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
        \u3053\u306e\u3084\u308a\u65b9\u3060\u3068\u3001self\u3082\u4f7f\u3048\u308b\u3057\u3001self\u304b\u3089\u629c\u3044\u305fparams\u306e\u5909\u6570\u3082\u898b\u3048\u307e\u3059\u306e\u3067\u3001\u308f\u3056\u308f\u3056$self\u3092\u6e21\u3059\u5fc5\u8981\u306f\u306a\u3044\u3067\u3059\uff01<\/p>\n
        \u307e\u3068\u3081<\/h1>\n
        macro_rules!\u3092\u7d39\u4ecb\u3057\u3066\u3001self\u3092macro\u306e\u4e2d\u3067\u3069\u3046\u6271\u3046\u304b\u3082\u8aac\u660e\u3057\u3066\u53c2\u308a\u307e\u3057\u305f\u304c\u3001\u5982\u4f55\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n
        DRY\uff08\u540c\u3058\u30b3\u30fc\u30c9\u3092\u7e70\u308a\u8fd4\u3059\u306a\uff09\u3092\u5fb9\u5e95\u3059\u308b\u4e0a\u3067\u306f\u975e\u5e38\u306b\u6709\u7528\u306amacro_rules!\u3067\u3059\u3002\u7b46\u8005\u306fwp_query_rs\u3067\u7d39\u4ecb\u3057\u305f\u4e8c\u3064\u306emacro\u3067200\u884c\u307b\u3069\u77ed\u7e2e\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n
        \u8208\u5473\u3042\u308b\u65b9\u306f\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3082\u516c\u958b\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u305c\u3072\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n
         <\/p>\n
        \u7b46\u8005\u306f\u3001The Book\u306e\u8aac\u660e\u3060\u3051\u8aad\u3093\u3067\u3001Rust\u306emacro_rules!\u304c\u4e0a\u7d1a\u8005\u5411\u3051\u3067\u81ea\u5206\u306f\u306a\u304b\u306a\u304b\u4f7f\u3048\u306a\u3044\u3060\u308d\u3046\u3068\u601d\u3063\u3066\u3044\u307e\u3057\u305f\u304c\u3001Jon Gjengset\u3055\u3093\u306eCrust of Rust\u30b7\u30ea\u30fc\u30ba\u306eCrust of Rust: Declarative Macros\u3092\u898b\u305f\u3089\u3001\u6848\u5916\u4f7f\u3048\u308b\u306a\u3068\u6539\u3081\u3066\u601d\u3044\u307e\u3057\u305f\u3002<\/p>\n
        \u4ed6\u306e\u65e5\u672c\u306eRustacean\u305f\u3061\u3082\u3044\u304b\u304c\u3067\u3057\u3087\u3046\u304b\uff1fmacro_rules!\u3092\u73fe\u5834\u3067\u4f7f\u3048\u3066\u3044\u307e\u3059\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n","protected":false},"excerpt":{"rendered":"
        \u30cf\u30a4\u30b5\u30a4\uff01\u30aa\u30fc\u30b9\u30c6\u30a3\u30f3\u3084\u3044\u3073\u30fc\u3093\uff01 \u6982\u8981 Rust\u306emacro_rules!\u3092\u7d39\u4ecb\u3057\u3001struct\u306eimpl\u30e1 […]<\/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-45191","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\/45191-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u30cf\u30a4\u30b5\u30a4\uff01\u30aa\u30fc\u30b9\u30c6\u30a3\u30f3\u3084\u3044\u3073\u30fc\u3093\uff01 \u6982\u8981 Rust\u306emacro_rules!\u3092\u7d39\u4ecb\u3057\u3001struct\u306eimpl\u30e1 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45191-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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