{"blog_title":"\u53f3\u4e0a\u2197","image_url":null,"url":"https://agtn.hatenablog.com/entry/2017/01/16/151745","width":"100%","description":"\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u3044\u3066\u3044\u308b\u3068\u4f55\u304b\u3057\u3089\u6728\u69cb\u9020\u3063\u307d\u3044\u3082\u306e\u3084\u30b0\u30e9\u30d5\u3063\u307d\u3044\u3082\u306e\u3092\u4f5c\u308a\u305f\u3044\u5834\u9762\u304c\u591a\u3005\u3042\u308b\u3068\u601d\u3044\u307e\u3059\uff0e Rust \u306f\u6240\u6709\u6a29\u3084 Size \u306e\u90fd\u5408\u3067\uff0c\u3053\u308c\u3089\u3092\u4f5c\u308d\u3046\u3068\u601d\u3046\u3068\u5730\u5473\u306b\u30cf\u30de\u308b\u306e\u3067\u307e\u3068\u3081\u3066\u304a\u304d\u307e\u3059\uff0e Rust \u3067\u6728\u69cb\u9020 \u6700\u3082\u5358\u7d14\u306a\u6728\u69cb\u9020\u306f Rust \u3060\u3068 enum Tree<T> { Leaf(T), Node(Box<Tree<T>>, Box<Tree<T>>), } \u3068\u3044\u3063\u305f\u5f62\u3067\u8868\u305b\u307e\u3059\uff0e Rust \u3067\u306f\u660e\u793a\u7684\u306b boxing \u3057\u3066\u3042\u3052\u306a\u3044\u3068\u518d\u5e30\u7684\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306f\u4f5c\u308c\u306a\u3044\u306e\u3067\u3061\u3087\u3063\u3068\u8907\u96d1\u306b\u898b\u3048\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\uff0c\u307e\u3041\u5358\u7d14\u3067\u3059\uff0e \u3053\u306e\u6728\u69cb\u9020\u3092\u66f8\u304d\u63db\u3048\u305f\u3044\u5834\u5408\u306f\uff0cownership \u3092\u3068\u3063\u2026","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","title":"Rust \u3067\u30b0\u30e9\u30d5\u69cb\u9020\u3084\u6728\u69cb\u9020\u3092\u4f5c\u308b","author_url":"https://blog.hatena.ne.jp/agtn/","type":"rich","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fagtn.hatenablog.com%2Fentry%2F2017%2F01%2F16%2F151745\" title=\"Rust \u3067\u30b0\u30e9\u30d5\u69cb\u9020\u3084\u6728\u69cb\u9020\u3092\u4f5c\u308b - \u53f3\u4e0a\u2197\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_url":"https://agtn.hatenablog.com/","published":"2017-01-16 15:17:45","author_name":"agtn","height":"190","categories":[],"version":"1.0"}