{"provider_url":"https://hatena.blog","categories":["C++","Boost"],"author_url":"https://blog.hatena.ne.jp/yohhoy/","author_name":"yohhoy","description":"C++11\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u304a\u3088\u3073Boost.Utility\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u63d0\u4f9b\u3055\u308c\u308bdeclval<T>\u30f3\u30d7\u30ec\u30fc\u30c8\u306e\u623b\u308a\u5024\u578b\u306b\u3064\u3044\u3066\u30e1\u30e2\u3002 template<class T> typename add_rvalue_reference<T>::type declval() noexcept; \u623b\u308a\u5024\u578b\u304c\u5358\u7d14\u306aT&&\u3068\u306a\u3063\u3066\u3044\u306a\u3044\u7406\u7531\u306f\u3001\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30d1\u30e9\u30e1\u30fc\u30bfT=void\u578b\u3092\u4e0e\u3048\u305f\u3068\u304d\u3001ill-formed\u306avoid&&\u3067\u306f\u306a\u304fvoid\u306b\u63a8\u8ad6\u3055\u305b\u308b\u305f\u3081\u3002*1 template<class T> T&& declval() noexcept; // NG: declval<void>()\u304cvoid&&\u306b\u2026","height":"190","width":"100%","type":"rich","blog_title":"yohhoy\u306e\u65e5\u8a18","version":"1.0","published":"2013-07-10 00:00:00","blog_url":"https://yohhoy.hatenadiary.jp/","title":"declval\u306e\u623b\u308a\u5024\u578b\u3068void","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyohhoy.hatenadiary.jp%2Fentry%2F20130710%2Fp1\" title=\"declval\u306e\u623b\u308a\u5024\u578b\u3068void - 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>","url":"https://yohhoy.hatenadiary.jp/entry/20130710/p1","image_url":null}