{"author_url":"https://blog.hatena.ne.jp/yohhoy/","height":"190","categories":["Rust"],"description":"Rust\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u304c\u63d0\u4f9b\u3059\u308b\u30cc\u30eb\u8a31\u5bb9\u578b std::option::Option<T> \u306e\u7a7a\u9593\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u306b\u3064\u3044\u3066\u30e1\u30e2\u3002\uff3b\u672c\u8a18\u4e8b\u306fRust 1.11/Stable\u6e96\u62e0\uff3d\u307e\u3068\u3081\uff1a T\u578b\u304c\u30dd\u30a4\u30f3\u30bf\u7684\u306b\u632f\u308b\u821e\u3046\uff08\u6709\u52b9\u5024\u304c\u975e\u30bc\u30ed\u3068\u4fdd\u969c\u3067\u304d\u308b\uff09\u5834\u5408\u3001\u30cc\u30eb\u30dd\u30a4\u30f3\u30bf\u6700\u9069\u5316(null pointer optimization)*1\u306b\u3088\u308aOption<T>\u578b\u306fT\u578b\u306e\u30b5\u30a4\u30ba\u306b\u7b49\u3057\u3044\u3002\u5185\u90e8\u7684\u306b\u306f\u50240\u3092None\u3001\u975e0\u5024\u3092Some(T)\u3068\u3057\u3066\u6271\u3046\u3002 \u305d\u308c\u4ee5\u5916\u306e\u5834\u5408\uff08\u6709\u52b9\u50240\u3082\u3068\u308a\u3046\u308b\u578b\uff09\u306e\u5834\u5408\u3001T\u578b\u306e\u4fdd\u6301\u9818\u57df\u3068\u306f\u5225\u306b\u8ffd\u52a0\u30e1\u30e2\u30ea\u304c\u5fc5\u8981\u3068\u306a\u308b\u3002Option<T>\u578b\u306e\u30b5\u30a4\u30ba\u306fT\u578b\u3088\u308a\u3082\u5927\u304d\u304f\u306a\u308b\u3002 use std::me\u2026","blog_title":"yohhoy\u306e\u65e5\u8a18","provider_name":"Hatena Blog","published":"2016-09-08 00:00:00","image_url":null,"title":"Option\u578b\u3068Null Pointer Optimization","provider_url":"https://hatena.blog","version":"1.0","type":"rich","author_name":"yohhoy","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyohhoy.hatenadiary.jp%2Fentry%2F20160908%2Fp1\" title=\"Option\u578b\u3068Null Pointer Optimization - yohhoy\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","url":"https://yohhoy.hatenadiary.jp/entry/20160908/p1","width":"100%","blog_url":"https://yohhoy.hatenadiary.jp/"}