{"url":"https://potisan-programming-memo.hatenablog.jp/entry/2020/11/09/213737","image_url":null,"categories":["C++"],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fpotisan-programming-memo.hatenablog.jp%2Fentry%2F2020%2F11%2F09%2F213737\" title=\"C++17 \u53f3\u8fba\u5024\u53c2\u7167\u3068RVO - potisan\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30e1\u30e2\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"\u6b21\u306e\u30b3\u30fc\u30c9\u306es3\u3001s4\u306e\u9006\u30a2\u30bb\u30f3\u30d6\u30ea\u304c\u4e88\u60f3\u3068\u9055\u3044\u307e\u3057\u305f\u3002 #include <string> int main() { std::wstring s1(L\"abc\"); std::wstring s2(L\"def\"); std::wstring s3(s1 + s2); // \u4e00\u6642\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u521d\u671f\u5316 std::wstring s4(std::move(s1 + s2)); // \u53f3\u8fba\u5024\u53c2\u7167\u3067\u521d\u671f\u5316 return 0; } \u4e88\u60f3\uff1as3\u3068s4\u306f\u3069\u3061\u3089\u3082std::wstring\u306e\u30e0\u30fc\u30d6\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u547c\u3073\u51fa\u3055\u308c\u308b\u3002 \u5b9f\u969b\uff1as3\u3068s4\u306f\u3069\u3061\u3089\u3082\u30e0\u30fc\u30d6\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u30b9\u30ad\u30c3\u30d7\u3057\u3066\u4e00\u6642\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u307e\u305f\u306f\u2026","type":"rich","author_name":"potisan","version":"1.0","blog_url":"https://potisan-programming-memo.hatenablog.jp/","provider_name":"Hatena Blog","author_url":"https://blog.hatena.ne.jp/potisan/","provider_url":"https://hatena.blog","height":"190","blog_title":"potisan\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30e1\u30e2","width":"100%","title":"C++17 \u53f3\u8fba\u5024\u53c2\u7167\u3068RVO","published":"2020-11-09 21:37:37"}