{"categories":[],"url":"https://ryuichi1208.hateblo.jp/entry/2025/12/15/000000","title":"\u3010C\u3011do { ... } while(0);\u30de\u30af\u30ed","width":"100%","height":"190","version":"1.0","blog_url":"https://ryuichi1208.hateblo.jp/","type":"rich","author_url":"https://blog.hatena.ne.jp/ryuichi1208/","image_url":null,"published":"2025-12-15 00:00:00","author_name":"ryuichi1208","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fryuichi1208.hateblo.jp%2Fentry%2F2025%2F12%2F15%2F000000\" title=\"\u3010C\u3011do { ... } while(0);\u30de\u30af\u30ed - \u5730\u65b9\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u5b66\u7fd2\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>","provider_name":"Hatena Blog","description":"\u3053\u306e\u8a18\u4e8b\u306f\u300c\u6e21\u90e8 Advent Calendar 2025\u300d\u306e15\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002 C \u306e\u30b3\u30fc\u30c9\u3092\u8aad\u3093\u3067\u3044\u308b\u3068\u3001\u3053\u3093\u306a\u30de\u30af\u30ed\u306b\u906d\u9047\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002 #define FOO(x) do { \\ bar(x); \\ baz(x); \\ } while (0) \u300c\u3048\u3063\u3001while(0) \u3063\u3066\u7d76\u5bfe 1 \u56de\u3067\u7d42\u308f\u308b\u3058\u3083\u3093\u3002\u306a\u306b\u3053\u308c\uff1f\u300d\u3068\u306a\u308a\u304c\u3061\u3067\u3059\u304c\u3001\u3053\u308c\u306f \u201c\u8907\u6570\u6587\u30de\u30af\u30ed\u3092\u5b89\u5168\u306b\u66f8\u304f\u305f\u3081\u306e\u5b9a\u756a\u30a4\u30c7\u30a3\u30aa\u30e0\u201d \u3067\u3059\u3002\u7d50\u8ad6\u304b\u3089\u8a00\u3046\u3068\u3001do { ... } while(0) \u3067\u5305\u3080\u3053\u3068\u3067\u3001\u30de\u30af\u30ed\u3092 1 \u6587\u3068\u3057\u3066\u6271\u3048\u308b \u3088\u3046\u306b\u306a\u308a\u3001if \u6587\u306a\u3069\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u3068\u304d\u306e\u4e8b\u6545\u3092\u9632\u3052\u307e\u3059\u3002 \u4e8b\u6545\u308b\u4f8b\uff1ado { ...\u2026","blog_title":"\u5730\u65b9\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u5b66\u7fd2\u65e5\u8a18","provider_url":"https://hatena.blog"}