{"image_url":null,"url":"https://unk-pizza.hatenadiary.org/entry/20130212/p1","blog_url":"https://unk-pizza.hatenadiary.org/","type":"rich","version":"1.0","width":"100%","title":"rvalue reference","author_url":"https://blog.hatena.ne.jp/unk_pizza/","author_name":"unk_pizza","categories":["C/C++"],"height":"190","blog_title":"\u304a\u3063\u3055\u3093\u30d7\u30ed\u30b0\u30e9\u30de\u306e\u622f\u308c\u8a00","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Funk-pizza.hatenadiary.org%2Fentry%2F20130212%2Fp1\" title=\"rvalue reference - \u304a\u3063\u3055\u3093\u30d7\u30ed\u30b0\u30e9\u30de\u306e\u622f\u308c\u8a00\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2013-02-12 00:00:00","description":"\u6700\u8fd1\u306b\u306a\u3063\u3066rvalue reference\u3068\u3044\u3046\u3082\u306e\u3092\u77e5\u308a\u307e\u3057\u305f\u3002 \u307e\u3060\u304d\u3061\u3093\u3068\u7406\u89e3\u3067\u304d\u3066\u3044\u306a\u3044\u53ef\u80fd\u6027\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u4e00\u5fdc\u30e1\u30e2\u66f8\u304d\u3002\u79c1\u306f\u4eca\u307e\u3067\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u305d\u306e\u3082\u306e\u3092\u5024\u8fd4\u5374\u3059\u308b\u95a2\u6570\u306e\u4f5c\u6210\u3092\u907f\u3051\u3066\u3044\u307e\u3057\u305f\u3002 class A { public: A() : v(1000000) {} std::vector<int> v; }; A f() { A a; a.v[10] = 10; a.v[100] = 100; //... return a; } void g() { A a = f(); } \u306a\u305c\u306a\u3089\u3001\u6614\u306eC++\u3067\u306f\u3001\u95a2\u6570g\u5185\u306ea\u3092\u3001\u95a2\u6570f\u306e\u623b\u308a\u5024\u3067\u521d\u671f\u5316\u3059\u308b\u969b\u306b\u3001\u6697\u9ed9\u306e\u30b3\u30d4\u30fc\u30b3\u30f3\u30b9\u2026","provider_url":"https://hatena.blog","provider_name":"Hatena Blog"}