{"blog_url":"https://rhysd.hatenablog.com/","version":"1.0","image_url":null,"provider_name":"Hatena Blog","categories":["C++","Boost"],"title":" Boost.Variant \u306b\u578b\u6307\u5b9a\u3067\u30a2\u30af\u30bb\u30b9\u3057\u305f\u3044","type":"rich","author_name":"rhysd","author_url":"https://blog.hatena.ne.jp/rhysd/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Frhysd.hatenablog.com%2Fentry%2F2014%2F01%2F03%2F024421\" title=\" Boost.Variant \u306b\u578b\u6307\u5b9a\u3067\u30a2\u30af\u30bb\u30b9\u3057\u305f\u3044 - \u306f\u3084\u304f\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u306a\u308a\u305f\u3044\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"boost::variant \u306e\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5834\u5408\uff0cwhich() \u30e1\u30f3\u30d0\u95a2\u6570\u3067 boost::variant \u304c\u4fdd\u6301\u3057\u3066\u3044\u308b\u5024\u306e\u578b\u3092\u898b\u3066\u304b\u3089\u30a2\u30af\u30bb\u30b9\u3059\u308b\u304b static_visitor \u3067\u30a2\u30af\u30bb\u30b9\u3059\u308b\u304b\u306e\u4e8c\u629e\u304c\u666e\u901a\u3060\u3068\u601d\u3046\u3051\u308c\u3069\uff0c\u300cwhich() \u3067\u30a2\u30af\u30bb\u30b9\u3059\u308b\u306e\u306f\u30de\u30b8\u30c3\u30af\u30ca\u30f3\u30d0\u30fc\u5897\u3048\u308b\u304b\u3089\u5acc\u300d\u300c\u3061\u3087\u3063\u3068\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3060\u3051\u3067 static_visitor \u3092\u5b9a\u7fa9\u3059\u308b\u306e\u306f\u5927\u4ef0\u3059\u304e\u308b\u300d\u3068\u3044\u3046\u3053\u3068\u3067\uff0c\u578b\u3067\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u95a2\u6570\u304c\u307b\u3057\u3044\u306a\u3068\u306a\u3063\u305f\uff0e \u306e\u3067\uff0c\u4f5c\u3063\u305f\u307f\u305f\uff0e \u623b\u308a\u5024\u578b\u306f boost::optional \u3067\uff0cboost::variant \u304c\u76ee\u7684\u306e\u578b\u306e\u5024\u3092\u4fdd\u6301\u3057\u3066\u3044\u306a\u3051\u308c\u3070 boost::non\u2026","height":"190","width":"100%","published":"2014-01-03 02:44:21","blog_title":"\u306f\u3084\u304f\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u306a\u308a\u305f\u3044","provider_url":"https://hatena.blog","url":"https://rhysd.hatenablog.com/entry/2014/01/03/024421"}