{"provider_name":"Hatena Blog","description":"C++2a(C++20)\u306b\u304a\u3051\u308b\u7279\u6b8a\u5316\u3055\u308c\u305f\u95a2\u6570\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u547c\u3073\u51fa\u3057\u3068ADL(Argument Dependent Lookup)\u306b\u95a2\u3059\u308b\u5c0f\u3055\u306a\u6539\u5584\u3002C++17\u73fe\u5728\u306e\u8a00\u8a9e\u4ed5\u69d8\u3067\u306f\u3001\u30bf\u30d7\u30eb\u8981\u7d20\u30a2\u30af\u30bb\u30b9\u95a2\u6570\u306fstd::get<N>\u306e\u3088\u3046\u306b\u5b8c\u5168\u4fee\u98fe\u540d\u3067\u547c\u3073\u51fa\u3059\u3001\u3082\u3057\u304f\u306fusing std::get;\u306b\u3088\u308a\u540d\u524dget\u3092\u73fe\u5728\u306e\u540d\u524d\u7a7a\u9593\u3078\u53d6\u308a\u8fbc\u3093\u3067\u304a\u304f\u5fc5\u8981\u304c\u3042\u308b\u3002C++2a\u8a00\u8a9e\u4ed5\u69d8\u3067\u306f\u3053\u306e\u5236\u9650\u304c\u7de9\u548c\u3055\u308c\u3001ADL\u306b\u3088\u3063\u3066\u671f\u5f85\u901a\u308astd::get\u95a2\u6570\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u898b\u3064\u3051\u308b\u3088\u3046\u306b\u306a\u308b\u3002 #include <tuple> std::tuple<char, int, double> tp{'X', 42, 3.14\u2026","blog_title":"yohhoy\u306e\u65e5\u8a18","published":"2018-12-15 00:00:00","type":"rich","version":"1.0","author_name":"yohhoy","url":"https://yohhoy.hatenadiary.jp/entry/20181215/p1","width":"100%","blog_url":"https://yohhoy.hatenadiary.jp/","title":"\u95a2\u6570\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u7279\u6b8a\u5316\u3068ADL\u306e\u5c0f\u6539\u5584","categories":["C++","C++2a"],"height":"190","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyohhoy.hatenadiary.jp%2Fentry%2F20181215%2Fp1\" title=\"\u95a2\u6570\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u7279\u6b8a\u5316\u3068ADL\u306e\u5c0f\u6539\u5584 - yohhoy\u306e\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>","author_url":"https://blog.hatena.ne.jp/yohhoy/","image_url":null}