{"title":"C#: null \u308c\u308b class \u3068 null \u308c\u306a\u3044 struct \u3044\u305a\u308c\u306e\u53ef\u80fd\u6027\u3082\u3042\u308b object \u3092 as<T> \u3057\u305f\u3044\u5834\u5408\u306e\u9650\u754c\u3001\u3042\u308b\u3044\u306f C# \u3089\u3057\u3044\u7d50\u8ad6","description":"// \u3053\u308c\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u3067\u304d\u306a\u3044(\u00b4\u30fb\u03c9\u30fb\uff40) // object -> T static public T As<T>( object o ) { return o as T; } // as T \u3067\u304d\u308b\u305f\u3081\u306b\u306f T \u306b class \u5236\u7d04\u304c\u5fc5\u8981\u3002\u3053\u308c\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u3067\u304d\u308b\u3057\u3001\u671f\u5f85\u52d5\u4f5c\u3059\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u3002 // object(class=null\u308c\u308b\u4f55\u304b) -> T static public T As<T>( object o ) where T: class { return o as T; } // \u3053\u308c\u306f As<T> \u304c\u671f\u5f85\u52d5\u4f5c\u3059\u308b\u3002 object a = \"\u042f\uff08\u3084\u30fc\uff09\"; var aa = \u2026","image_url":null,"provider_url":"https://hatena.blog","height":"190","version":"1.0","blog_url":"https://usagi.hatenablog.jp/","type":"rich","width":"100%","published":"2018-12-26 19:28:47","categories":["C#","generics","null","Nullable","class","struct","IConvertible","cast","complex"],"author_url":"https://blog.hatena.ne.jp/USAGI-WRP/","blog_title":"C++ \u3068\u304d\u3069\u304d \u3054\u306f\u3093\u3001\u308f\u308a\u3068\u3066\u3043\u30fc\u3076\u308c\u3044\u304f\u2606","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fusagi.hatenablog.jp%2Fentry%2F2018%2F12%2F26%2F192847\" title=\"C#: null \u308c\u308b class \u3068 null \u308c\u306a\u3044 struct \u3044\u305a\u308c\u306e\u53ef\u80fd\u6027\u3082\u3042\u308b object \u3092 as&lt;T&gt; \u3057\u305f\u3044\u5834\u5408\u306e\u9650\u754c\u3001\u3042\u308b\u3044\u306f C# \u3089\u3057\u3044\u7d50\u8ad6 - C++ \u3068\u304d\u3069\u304d \u3054\u306f\u3093\u3001\u308f\u308a\u3068\u3066\u3043\u30fc\u3076\u308c\u3044\u304f\u2606\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_name":"USAGI-WRP","url":"https://usagi.hatenablog.jp/entry/2018/12/26/192847"}