{"provider_name":"Hatena Blog","height":"190","width":"100%","image_url":null,"categories":["C++0x","C++","C++0x","C++"],"blog_title":"Cry's Blog","author_name":"Cryolite","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.cryolite.net%2Fentry%2F20080410%2Fp1\" title=\" - Cry&#39;s Blog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"\u306a\u3093\u3067 requirement \u306b\u95a2\u3059\u308b\u63a8\u8ad6\u304c\u6b32\u3057\u304f\u306a\u3063\u305f\u304b\u3068\u3044\u3046\u3068\uff0c\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u306e\u3092\u898b\u3066\u305f\u3089\u3046\u306b\u3085\u30fc\u3093\u3063\u3066\u3044\u3046\uff0e \u305f\u3068\u3048\u3070\uff0c // \u3068\u308a\u3042\u3048\u305a\u7d30\u304b\u3044\u3053\u3068\u306f\u304a\u3044\u3068\u3044\u3066\uff0c\u300c\u578b T \u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u6301\u3063\u3066\u308b\u300d\u3068\u3044\u3046\u5236\u7d04\u306e\u8a18\u8ff0\u3060\u3068\u601d\u3063\u3066\uff01 concept DefaultConstructible<typename T> { T::T(); } template<class T> requires DefaultConstructible<T> // \u95a2\u6570\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8 f \u306f\uff0c\u305d\u306e\u578b\u30d1\u30e9\u30e1\u30bf T \u304c // \u30c7\u30d5\u30a9\u30eb\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u6301\u3063\u3066\u3044\u306a\u3044\u3068\u3044\u3051\u306a\u3044\uff0c\u3068\u3044\u3046\u8a18\u8ff0 T f() { // \u2026","title":"","author_url":"https://blog.hatena.ne.jp/Cryolite/","url":"https://blog.cryolite.net/entry/20080410/p1","published":"2008-04-10 00:00:00","type":"rich","version":"1.0","provider_url":"https://hatena.blog","blog_url":"https://blog.cryolite.net/"}