{"author_url":"https://blog.hatena.ne.jp/syu-m-5151/","categories":["Rust"],"image_url":null,"title":"newtype \u3068 `PhantomData` \u3067\u300c\u6df7\u305c\u305f\u3089\u578b\u30a8\u30e9\u30fc\u300d\u3092\u4f5c\u308b","url":"https://syu-m-5151.hatenablog.com/entry/2026/05/06/111448","author_name":"syu-m-5151","blog_title":"\u3058\u3083\u3042\u3001\u304a\u3046\u3061\u3067\u5b66\u3079\u308b ","height":"190","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","description":"\u306f\u3058\u3081\u306b UserId \u3068 OrderId \u3092\u53d6\u308a\u9055\u3048\u3066\u30d0\u30b0\u3092\u751f\u307f\u51fa\u3059\u7d4c\u9a13\u306f\u3001String \u3067\u8b58\u5225\u5b50\u3092\u6271\u3063\u3066\u3044\u308c\u3070\u8ab0\u3057\u3082\u3042\u308a\u307e\u3059\u3002Rust \u3067\u306f newtype \u3067\u5225\u306e\u578b\u306b\u5206\u3051\u308b\u3060\u3051\u3067\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u306b\u6b62\u3081\u3066\u3082\u3089\u3048\u307e\u3059\u3002\u3055\u3089\u306b PhantomData \u3092\u7d44\u307f\u5408\u308f\u305b\u308c\u3070\u3001\u300cJPY \u3068 USD \u3092\u8db3\u3057\u7b97\u3059\u308b\u300d\u306e\u3088\u3046\u306a\u5358\u4f4d\u30df\u30b9\u3082\u578b\u30a8\u30e9\u30fc\u306b\u3067\u304d\u307e\u3059\u3002 \u30e9\u30f3\u30bf\u30a4\u30e0\u30b3\u30b9\u30c8\u306f\u30bc\u30ed\u3002\u578b\u60c5\u5831\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u5f8c\u306b\u6d88\u3048\u307e\u3059\u3002 newtype \u306e\u57fa\u672c newtype \u306f\u300cstruct \u3067\u30e9\u30c3\u30d7\u3057\u3066\u3001\u5225\u306e\u578b\u3068\u3057\u3066\u6271\u3046\u300d\u3060\u3051\u306e\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002 #[derive(Debug, Clone, PartialEq, Eq, Hash)]\u2026","blog_url":"https://syu-m-5151.hatenablog.com/","type":"rich","width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fsyu-m-5151.hatenablog.com%2Fentry%2F2026%2F05%2F06%2F111448\" title=\"newtype \u3068 `PhantomData` \u3067\u300c\u6df7\u305c\u305f\u3089\u578b\u30a8\u30e9\u30fc\u300d\u3092\u4f5c\u308b - \u3058\u3083\u3042\u3001\u304a\u3046\u3061\u3067\u5b66\u3079\u308b \" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","version":"1.0","published":"2026-05-06 11:14:48"}