{"provider_name":"Hatena Blog","categories":["C++"],"author_url":"https://blog.hatena.ne.jp/osyo-manga/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fosyo-manga.hatenadiary.org%2Fentry%2F20111215%2F1323956164\" title=\"::value \u3092\u77ed\u304f\u3059\u308b - C++\u3067\u30b2\u30fc\u30e0\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","type":"rich","blog_title":"C++\u3067\u30b2\u30fc\u30e0\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0","provider_url":"https://hatena.blog","title":"::value \u3092\u77ed\u304f\u3059\u308b","height":"190","blog_url":"https://osyo-manga.hatenadiary.org/","published":"2011-12-15 22:36:04","width":"100%","description":"\u6700\u8fd1\u3001\u3088\u304f\u4f7f\u3063\u3066\u3044\u308b\u3093\u3067\u3059\u304c\u3001std::integral_constant \u306f\u3001 constexpr operator value_ type() { return value; } \u3092\u5b9a\u7fa9\u3057\u3066\u3044\u308b\u306e\u3067\u3053\u3093\u306a\u611f\u3058\u3067\u6e21\u3059\u3053\u3068\u3082\u51fa\u6765\u307e\u3059\u3002 [\u30bd\u30fc\u30b9] #include <iostream> #include <type_traits> extern void* enabler; template<bool B, typename T = void> using enabler_if = typename std::enable_if<B, T>::type*&; template< typenam\u2026","author_name":"osyo-manga","url":"https://osyo-manga.hatenadiary.org/entry/20111215/1323956164","image_url":null,"version":"1.0"}