{"type":"rich","provider_name":"Hatena Blog","title":"\u30d7\u30ea\u30d7\u30ed\u30bb\u30c3\u30b5\u3067\u4ee3\u5165\u3057\u307e\u3057\u3087\u3046\uff01","image_url":null,"published":"2009-07-20 02:54:13","author_name":"DigitalGhost","url":"https://dechimal.hatenadiary.com/entry/20090720/1248112453","version":"1.0","blog_url":"https://dechimal.hatenadiary.com/","width":"100%","height":"190","provider_url":"https://hatena.blog","blog_title":"\u30c7-mk6","description":"\u3055\u3066\u4eca\u56de\u306f\u4ee3\u5165\u3067\u3059\u3002\u3068\u306f\u3044\u3063\u3066\u3082\u95a2\u6570\u30de\u30af\u30ed\u3092\u5c55\u958b\u4e2d\u306b\u4ee3\u5165\u3068\u304b\u306f\u7121\u7406\u3067\u3059\u3002\u306a\u306e\u3067\u3001#define\u3067\u3001\u30d7\u30ea\u30d7\u30ed\u30bb\u30b9\u30b7\u30f3\u30dc\u30eb\u306b\u4ee3\u5165\u3057\u307e\u3057\u3087\u3046\u3002 \u3042\u3068\u3082\u3046\u304b\u306a\u308a\u3081\u3093\u3069\u3044\u306e\u3067\u8d85\u5c55\u958b\u3067\u8a71\u304c\u9032\u307f\u307e\u3059\u3002 #define A 1 #define B A #undef A #define A 2 B \u6700\u5f8c\u306e\u884c\u306eB\u306f\u3001\u3082\u3061\u308d\u30932\u306b\u306a\u308a\u307e\u3059\u3002B\u304c\u5c55\u958b\u3055\u308c\u3066A\u306b\u306a\u308a\u3001A\u304c\u5c55\u958b\u3055\u308c\u30662\u306b\u306a\u308a\u307e\u3059\u3002B\u304c\u5b9a\u7fa9\u3055\u308c\u305f\u3068\u304d\u306eA\u306e\u5b9a\u7fa9\u306a\u3093\u3066\u77e5\u3063\u305f\u3053\u3063\u3061\u3083\u3042\u308a\u307e\u305b\u3093\u3002B\u3092\u5c55\u958b\u3057\u3088\u3046\u3068\u3057\u305f\u3068\u304d\u306e\u5b9a\u7fa9\u304c\u91cd\u8981\u3067\u3059\u3002 \u3057\u304b\u3057\u79c1\u306fB\u3092\u5c55\u958b\u3059\u308b\u30681\u306b\u306a\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u306e\u3067\u3059\u3002\u306a\u3093\u3067\uff1f\u4e16\u306e\u4e2d\u306b\u306f\u5927\u304d\u304f\u5206\u3051\u3066\u4e8c\u3064\u306e\u884c\u52d5\u304c\u3042\u308a\u307e\u3059\u3002\u7406\u7531\u306e\u3042\u308b\u884c\u52d5\u3068\u3001\u306a\u2026","author_url":"https://blog.hatena.ne.jp/DigitalGhost/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fdechimal.hatenadiary.com%2Fentry%2F20090720%2F1248112453\" title=\"\u30d7\u30ea\u30d7\u30ed\u30bb\u30c3\u30b5\u3067\u4ee3\u5165\u3057\u307e\u3057\u3087\u3046\uff01 - \u30c7-mk6\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":["C++","Preprocessor"]}