{"provider_url":"https://hatena.blog","url":"https://yohhoy.hatenadiary.jp/entry/20150927/p1","description":"C++1z(C++17)\u3067\u4fee\u6b63\u3055\u308c\u308b\u3001std::function\u30af\u30e9\u30b9\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u304c\u6271\u3046\u95a2\u6570\u623b\u308a\u5024\u578b\u306b\u307e\u3064\u308f\u308b\u5c0f\u3055\u306a\u554f\u984c\u3002 // \u30e9\u30e0\u30c0\u306fint\u3092\u8fd4\u3059\u304cfunction\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u623b\u308a\u5024\u578bvoid\u3092\u6271\u3046 std::function<void()> f = [](){ return 42; }; // C++11/14: \u672a\u5b9a\u7fa9\u52d5\u4f5c(undefined behavior) // C++1z: well-defiend \u3053\u306e\u554f\u984c\u306f LWG 2420 \u306b\u3066\u53d6\u308a\u6271\u308f\u308c\u30012015\u5e745\u6708\u73fe\u5728\u306eWorking Draft*1\u3067\u4fee\u6b63\u9069\u7528\u3055\u308c\u305f\u3002 \u4e0b\u8a18\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u306b\u304a\u3044\u3066\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8f1\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u547c\u2026","width":"100%","blog_title":"yohhoy\u306e\u65e5\u8a18","title":"std::function\u306e\u623b\u308a\u5024\u578b\u306b\u95a2\u3059\u308b\u5c0f\u4fee\u6b63","author_name":"yohhoy","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyohhoy.hatenadiary.jp%2Fentry%2F20150927%2Fp1\" title=\"std::function\u306e\u623b\u308a\u5024\u578b\u306b\u95a2\u3059\u308b\u5c0f\u4fee\u6b63 - 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>","provider_name":"Hatena Blog","blog_url":"https://yohhoy.hatenadiary.jp/","image_url":null,"author_url":"https://blog.hatena.ne.jp/yohhoy/","published":"2015-09-27 00:00:00","version":"1.0","height":"190","type":"rich","categories":["C++","C++1z"]}